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"ecdysis" Definitions
  1. the act of molting or shedding an outer cuticular layer
"ecdysis" Antonyms

108 Sentences With "ecdysis"

How to use ecdysis in a sentence? Find typical usage patterns (collocations)/phrases/context for "ecdysis" and check conjugation/comparative form for "ecdysis". Mastering all the usages of "ecdysis" from sentence examples published by news publications.

The term ecdysis comes from ('), "to take off, strip off".
Her power continuously grows each day after her first ecdysis. She also experiences wild mood and personality swings around the time her ecdysis is supposed to occur. While the first ecdysis just made her stronger with minimal physical alterations (six horns instead of two), the second ecdysis would supposedly turn her irrevocably into a giant disfigured monster of terrifying strength. :According to a prophecy, one who shed their skin twice would gain power surpassing that of the demon gods (including Azatodeth) but would turn into a large black monster with ten legs and four eyes.
135 Prawns eat less around the time of ecdysis (moulting), probably because of the softness of the mouthparts, and must eat more than usual to compensate, once ecdysis is complete. Prawns are an attractive food for predators, with a higher energy content than most other invertebrates.
A spider with a small abdomen may be undernourished but more probably has recently undergone ecdysis. Some arthropods, especially large insects with tracheal respiration, expand their new exoskeleton by swallowing or otherwise taking in air. The maturation of the structure and colouration of the new exoskeleton might take days or weeks in a long-lived insect; this can make it difficult to identify an individual if it has recently undergone ecdysis. Ecdysis allows damaged tissue and missing limbs to be regenerated or substantially re-formed.
Enzymes are secreted to digest the inner layers of the existing cuticle, detaching the animal from the outer cuticle. This allows the new cuticle to develop without being exposed to the environmental elements. After apolysis, ecdysis occurs. Ecdysis is the actual emergence of the arthropod into the environment and always occurs directly after apolysis.
A. ruficornis nymph. Lateral aspect, sitting on glass window. The brown colour only develops at the final ecdysis. A. ruficornis nymph.
CCAP is responsible for activation of the ecdysis motor program. Mutant flies that had a defect in CCAP neurons also couldn’t express bursicon.
While still in graduate school at Harvard, Truman identified an insect neurohormone now known as the eclosion hormone, which mediates moth ecdysis. He demonstrated that injecting eclosion hormone (EH) into moths elicits a stereotyped sequence of ecdysis behaviors.Žitňan, Dušan & Daubnerová, Ivana. (2016). Chapter 76 "Eclosion Hormone", Editors: Yoshio Takei, Hironori Ando, Kazuyoshi Tsutsui, Handbook of Hormones, Academic Press, Pages 459-e76-2, .
Adult Rhopalomyia solidaginis fly, emerging from pupal case Process of ecdysis of a cicada. Ecdysis is the moulting of the cuticle in many invertebrates of the clade Ecdysozoa. Since the cuticle of these animals typically forms a largely inelastic exoskeleton, it is shed during growth and a new, larger covering is formed. The remnants of the old, empty exoskeleton are called exuviae.
Dysecdysis, a common skin disease in snakes and lizards, will occur when ecdysis, or shedding, fails. There are numerous reasons why shedding fails and can be related to inadequate humidity and temperature, nutritional deficiencies, dehydration and traumatic injuries. Nutritional deficiencies decrease proteolytic enzymes while dehydration reduces lymphatic fluids to separate the skin layers. Traumatic injuries on the other hand, form scars that will not allow new scales to form and disrupt the process of ecdysis.
Eurypterids are a group of chelicerates that became extinct in the Late Permian. They underwent ecdysis similarly to extant chelicerates, and most fossils are thought to be of exuviae, rather than cadavers.
In future studies of silkmoth eclosion, Truman went on to confirm the role of EH in mediating ecdysis. Later studies also implicated a brain-based circadian clock as the regulator controlling the release of EH.
In males, the gonads mature over a few weeks after the final ecdysis and their weight also steadily increases. Female weight increases as a result of mating stimulating egg maturation. Mating occurs once females reach at least 30g.
In 2008, a juvenile form was artificially produced by treating y-larvae with the hormone 20-hydroxyecdysone, which stimulated ecdysis and the transition to a new life phase. The resulting animal, named the ypsigon, was slug-like, apparently unsegmented, and limbless.
These fungi occur usually only on adult hosts; apparently immature arthropods eliminate them during ecdysis (adult arthropods no longer molt). Some thallus-forming species are dioecious, that is, they have separate female and male individuals, like Herpomyces (in the order Herpomycetales).
When used in paleontology, suture can also refer to fossil exoskeletons, as in the suture line, a division on a trilobite between the free cheek and the fixed cheek; this suture line allowed the trilobite to perform ecdysis (the shedding of its skin).
The front wings are vestigial and reduced to pad-like structures. Adults grow to long and wide. Bed bugs have five immature nymph life stages and a final sexually mature adult stage. They shed their skins through ecdysis at each stage, discarding their outer exoskeleton.
This is prevented by an arm bracelet gotten from Mink's great- grandfather. The bracelet monitors and suppresses Mink's power. When it's turned off, the counter on the bracelet rises, showing Mink's rise in strength. If the counter ever reaches 999, the second ecdysis would occur.
Desiccation is not required for hatching, however. The larva hatches as a metanauplius. It undergoes ecdysis, or molting, several times, growing more phyllopods each time. L. packardi takes about 38 days to mature, reproduces around its 54th day of life, and lives about 144 days.
Female crab spider Synema decens, teneral after final ecdysis, still dangling from drop line, about to be mated, opisthosoma still shrunken Complete process of a spider moulting. Spiders generally change their skin for the first time while still inside the egg sac, and the spiderling that emerges broadly resembles the adult. The number of moults varies, both between species and sexes, but generally will be between five times and nine times before the spider reaches maturity. Not surprisingly, since males are generally smaller than females, the males of many species mature faster and do not undergo ecdysis as many times as the females before maturing.
Miho has also performed solo and on October 21, 2005 her first solo album, Ecdysis was released in Japan, later to the American and European market. The song, "Birthday Cake," from the first Cibo Matto album was used in the Xbox game, Jet Set Radio Future.
Eleuteroschisis is asexual reproduction in dinoflagellates in which the parent organism completely sheds its theca (i.e. undergoes ecdysis) either before or immediately following cell division. Neither daughter cell inherits part of the parent theca.FENSOME R.A., TAYLOR F.J.R., NORRIS G., SARJEANT W.A.S., WHARTON D.I. & WILLIAMS G.L. 1993.
The cysts are small dark red or violet bubbles clustered on the host plant's roots. Female cysts are in diameter. Males are half the size of their female counterparts and fewer in number, with only one male per 500 females. The cysts undergo ecdysis a number of times.
Clouded brille of a colubrid nearing ecdysis Clear brille of the same snake - 20 days earlier Exuvia of grass snake Natrix natrix, showing brille scales The brille (also called the ocular scale, eye cap or spectacle) is the layer of transparent, immovable disc-shaped skin or scale covering the eyes of some animals for protection, especially in animals without eyelids. The brille has evolved from a fusion of the upper and lower eyelids. Brille means "spectacles" or "glasses" in German, Norwegian and Danish and "shine" in French and Spanish. In snakes, there are no eyelids and the brille is clear and cannot be distinguished, except when the animal is becoming ready for ecdysis.
Homolodromiidae is a family of crabs, the only family in the superfamily Homolodromioidea. In contrast to other crabs, including the closely related Homolidae, there is no strong linea homolica along which the exoskeleton breaks open during ecdysis. The family comprises two genera, Dicranodromia, which has 18 species, and Homolodromia, with five species.
The coxa, basis, ischium are smaller aspects that serve to attach the jointed limb to the crab's body. The exoskeleton is composed of a chitin cuticle. This is periodically molted when the crab undergoes ecdysis. Following this shedding, other organisms or the crab itself will ingest the former shell to gain its nutrients.
Reptiles shed their skin through a process called ecdysis which occurs continuously throughout their lifetime. In particular, younger reptiles tend to shed once every 5–6 weeks while adults shed 3–4 times a year. Younger reptiles shed more because of their rapid growth rate. Once full size, the frequency of shedding drastically decreases.
Cicada climbing out of its exoskeleton while attached to tree The exoskeleton cannot stretch and thus restricts growth. Arthropods therefore replace their exoskeletons by undergoing ecdysis (moulting), or shedding the old exoskeleton after growing a new one that is not yet hardened. Moulting cycles run nearly continuously until an arthropod reaches full size.Ruppert, Fox & Barnes (2004), pp.
Females are known to have multiple broods, typically up to two to three. The newly hatched caterpillars will group together until they shed their skin—termed an instar for each shedding. This shedding event occurs four times throughout development in a process called ecdysis. The larvae experience a fifth skin shed to produce a fully grown caterpillar.
Chapter "Immature stages", (pp. 104–133). After growth and ecdysis, the caterpillar enters into a sessile developmental stage called a pupa (or chrysalis) around which it may form a casing. The insect develops into the adult in the pupa stage; when ready the pupa hatches and the adult stage or imago of a butterfly or moth arises.
Volatile constituents of larval osmeterial secretions in Papilio protenor demetrius. Journal of Insect Physiology, 26(1), 39-45. doi: 10.1016/0022-1910(80)90108-0 5th larvae secretion is mainly aliphatic acid and their esters, while the previous instars contain primarily mono- and sesquiterpenoids. Scientists suspect that these differences are associated with the colouration of the 4th larval ecdysis.
The eyelids of a snake are transparent "spectacle" scales, which remain permanently closed, also known as brille. The shedding of scales is called ecdysis (or in normal usage, molting or sloughing). In the case of snakes, the complete outer layer of skin is shed in one layer.Smith, Malcolm A. The Fauna of British India, Including Ceylon and Burma.
Each instar - the period between molts - generally takes about 4–10 days. There are five instars before cocooning. At the end of each instar, a small amount of silk is placed on the major vein of a leaf and the larva undergoes apolysis, then ecdysis (molting), leaving the old exoskeleton behind. Sometimes the shed exoskeleton is eaten.
The side lobes of the thorax (or pleurae, singular pleura) have rounded ends. The pygidium is well rounded, semicircular or shorter, with an entire margin, and without lateral and posterior projections. In many Phacopidae, where the facial sutures are apparently continuous and well developed, they were evidently nonfunctional in ecdysis, since no separate free cheeks can be found.
Egg cases are about long, brown, and purse-shaped. Immature cockroaches emerge from egg cases in 6–8 weeks and require 6–12 months to mature. After hatching, the nymphs feed and undergo a series of 13 moultings (or ecdysis). Adult cockroaches can live up to an additional year, during which females produce an average of 150 young.
As mentioned, some have prolegs as well as "true" thoracic legs. Some have no externally visible legs at all (though they have internal rudiments that emerge as adult legs at the final ecdysis). Examples include the maggots of flies or grubs of weevils. In contrast, the larvae of other Coleoptera, such as the Scarabaeidae and Dytiscidae have thoracic legs, but no prolegs.
523–524 The developmental stages between each moult (ecdysis) until sexual maturity is reached is called an instar. Differences between instars can often be seen in altered body proportions, colors, patterns, changes in the number of body segments or head width. After moulting, i.e. shedding their exoskeleton, the juvenile arthropods continue in their life cycle until they either pupate or moult again.
Ixodes holocyclus requires three hosts to complete its life cycle, thus it is a 'three-host tick'. To moult to the next stage a blood meal must be obtained by the larva or nymph. Moulting is known as ecdysis. To find a host, ticks use a behaviour known as 'questing' - climbing onto vegetation and waving forelegs slowly until a host comes within reach.
The Articulata hypothesis is the grouping in a higher taxon of animals with segmented bodies, consisting of Annelida and Panarthropoda. This theory states that these groups are descended from a common segmented ancestor. The Articulata hypothesis is an alternative to the hypothesis that ecdysis (the shedding of outer cuticle) is a primitive characteristic – this would place Panarthropoda in the group Ecdysozoa.
In moulting, first the old cuticle separates from the epidermis (apolysis). Enzymatic moulting fluid is released between the old cuticle and epidermis, which separates the exocuticle by digesting the endocuticle and sequestering its material for the new cuticle. When the new cuticle has formed sufficiently, the epicuticle and reduced exocuticle are shed in ecdysis.. (2002). A Survey of Entomology. iUniverse. .
In general, the stratum corneum contains 15 to 20 layers of corneocytes. The stratum corneum has a thickness between 10 and 40 μm. In reptiles, the stratum corneum is permanent, and is replaced only during times of rapid growth, in a process called ecdysis or moulting. This is conferred by the presence of beta-keratin, which provides a much more rigid skin layer.
The process of ecdysis involves forming a new layer of skin under the old one. Proteolytic enzymes and lymphatic fluid is secreted between the old and new layers of skin. Consequently, this lifts the old skin from the new one allowing shedding to occur. Snakes will shed from the head to the tail while lizards shed in a "patchy pattern".
All snakeflies require a period of cool temperatures (probably around ) to induce pupation. The length of the pupation stage is variable. Most species pupate in the spring or early summer, and take a few days to three weeks before ecdysis. If the larvae begin pupation in the late summer or early fall, they can take up to ten months before the adults emerge.
The cephalon does not end in genal spines. The side lobes of the thorax (or pleurae, singular pleura) have rounded ends. The pygidium is well rounded, semicircular or shorter, with an entire margin, and without lateral and posterior projections. In many Phacopidae, where the facial sutures are apparently continuous and well developed, they were evidently nonfunctional in ecdysis, since no separate free cheeks can be found.
A female deposits some 10 to 50 eggs in an ootheca. The period between egg- laying and hatching varies according to temperature and humidity, but about fifty days would be typical. After hatching, the nymphs feed on small insects such as houseflies and fruit flies. Males develop into adults after undergoing ecdysis about seven times into successive instars, while females mature after about eight instars.
In the manga, her main enemies are King Siva, Princess Vena, and Azatodeth. Mink is also infatuated with Dick Saucer, the handsome dragonslayer and popstar. However, because of her half-human/half- dragon heritage, she is actively seeking out the legendary , which would make her fully human. :As a part-dragon, she undergoes ecdysis, in which she sheds her skin and becomes more powerful.
In the end, Azatodeth is killed by the holy sword wielded by Mink, after she had undergone her second ecdysis. :Although Azatodeth plays an important role in the manga, he does not in the anime, only mentioned and in a background. ;Blacksmith Tony :You never see this character, but he is important to the story. He is ingenious for making mecha-suits and creatures.
A snake shedding its skin Molting, or ecdysis, serves a number of functions. Firstly, the old and worn skin is replaced; secondly, it helps get rid of parasites such as mites and ticks. Renewal of the skin by molting is supposed to allow growth in some animals such as insects; however, this has been disputed in the case of snakes. Molting occurs periodically throughout the snake's life.
Ant mimicry is a useful defense against predation for the young, as most ants are relatively unpalatable and aggressive, making insect predators that rely on vision to identify their prey, such as birds and wasps, avoid them. Around their third ecdysis, Creobroter spp. trade their ant-mimicking, dark, shiny appearance for the green and light-colored markings that make their outline so difficult to discern amidst vegetation.
Facial or cephalic sutures are the natural fracture lines in the cephalon of trilobites. Their function was to assist the trilobite in shedding its old exoskeleton during ecdysis (or molting). All species assigned to the suborder Olenellina, that became extinct at the very end of the Early Cambrian (like Fallotaspis, Nevadia, Judomia, and Olenellus) lacked facial sutures. They are believed to have never developed facial sutures, having pre-dated their evolution.
Secondly, often a major injury in one phase, such as the loss of a leg from an insect nymph, or a claw from a young crab, can be repaired after one or two stages of ecdysis. Similarly, delicate parts that need periodic replacement, such as the outer surfaces of the eye lenses of spiders, or the urticating hairs of caterpillars, can be shed, making way for new structures.
Pure neem oil has been found to be the most effective antifeedants by the third instar. Pure neem oil and azatrol are most effective feeding deterrent for the second and fourth instars of southern armyworm. Although these products worked in laboratory experiences, it was found that the magnitude of the negative effect on the larval mortality and pupal ecdysis varied considerably among neem-derived insecticides tested.Hail Shanna, John Capinera, Nawaf Freihat.
As an arthropod, A. magnificus, is segmented and bilaterally symmetrical. The body of the shrimp contains a hard external skeleton called, exoskeleton, made of chitin which periodically molts by a process called ecdysis. A. magnificus, has a compressed body composed of a cephalothorax, containing a head and a thorax attached to an elongated abdomen. It has five pairs of pereiopods, two pair of antennae, a mandible, and three pairs of maxillipeds.
He resumed his studies in Montpellier and Toulouse where he graduated in zoology in 1922. He then became a preparator at the University of Toulouse where he will passed all his career retiring in 1962 as a senior lecturer. His thesis, written in 1930, was devoted to the development, the phenomenon of ecdysis, autotomy and regeneration in the spiders, mainly in the European species of the genus Dolomedes.
Ecdysis is the first solo album by Japanese musician Miho Hatori. She came to prominence with a series of contributions to diverse bands, including Cibo Matto, Gorillaz, the Beastie Boys, and Smokey & Miho before working entirely as a solo performer. The album was released on October 21, 2005 in Japan under the Speedstar International label. The album was distributed in the United States one year later under the Rykodisc label.
The spider can fast for weeks to months at a time. Fasting is sometimes an indication of an upcoming ecdysis (moult). G. rosea is usually skittish, running away from danger rather than acting defensively, but it may also raise its front legs and present its fangs in preparation to defend itself. It can act especially defensive for days after moulting; this may be innate in the spider's behavior.
The larval stage is where the feeding and growing stages occur, and the larvae periodically undergo hormone-induced ecdysis, developing further with each instar, until they undergo the final larval-pupal molt. The larvae of both butterflies and moths exhibit mimicry to deter potential predators. Some caterpillars have the ability to inflate parts of their heads to appear snake- like. Many have false eye-spots to enhance this effect.
This stage is the most vulnerable state of the parasitoid wasp's lifecycle. This is the part of the lifecycle that explains why Z. percontatoria prefers the web-building spiders of the family Theridiidae. The larva will begin influencing the spider to build a web. Scientists hypothesize that the larva is somehow able to increase levels of the hormone that encourages behaviors that the spider would conduct before molting or ecdysis.
Many insects, such as grasshoppers and bees, which actively pump the air sacs in their abdomen, are able to control the flow of air through their body. In some aquatic insects, the tracheae exchange gas through the body wall directly, in the form of a gill, or function essentially as normal, via a plastron. Note that despite being internal, the tracheae of arthropods are lined with cuticular tissue and are shed during moulting (ecdysis).
This structure, made from host tissue, protects them from the immune defences of the host. Larvae go through four more instars, and in each moult the older cuticle separates but is not discarded ("apolysis without ecdysis"), so multiple layers form around the larvae. Male larvae pupate after the last moult, but females directly become neotenous adults. The colour and shape of the host's abdomen may be changed and the host usually becomes sterile.
Cascavel (Crotalus durrisus), a rattlesnake, seen moulting. The shedding of scales is called ecdysis, or, in normal usage moulting or sloughing. Moulting serves a number of functions - first, the old and worn skin is replaced; second, it helps get rid of parasites such as mites and ticks. Renewal of the skin by moulting is supposed to allow growth in some animals such as insects, however this view has been disputed in the case of snakes.
Later, he demonstrated that insect hearing depends on intact tympanal organ which was the first description of this organ's function. For his contributions he is regarded as the founder of modern bioacoustics. He also studied other physiological phenomena in insects, such as breathing, hibernation, the development of pigment under different conditions, and ecdysis. Regen's largest project was a so-called "geobiological laboratory", a large terrarium in which he studied phonotaxis on a large scale.
The nymphs resemble fully grown adults except for size and the absence of wings. Nymphs usually undergo four to five successive stages of moltings (ecdysis), increasing in size and becoming more adult-like with each stage until the final molting. The stages are individually known as instars, with the earliest stage (just after hatching) being known as the first nymphal instar. Nymphs may also differ significantly from adults in colors and patterns exhibited.
20-Hydroxyecdysone (ecdysterone or 20E) is a naturally occurring ecdysteroid hormone which controls the ecdysis (moulting) and metamorphosis of arthropods. It is therefore one of the most common moulting hormones in insects, crabs, etc. It is also a phytoecdysteroid produced by various plants, including Cyanotis vaga, Ajuga turkestanica and Rhaponticum carthamoides where its purpose is presumably to disrupt the development and reproduction of insect pests. In arthropods, 20-hydroxyecdysone acts through the ecdysone receptor.
Cluster type aggregations form alongside temporary crowding and excess of food while ball type aggregations may manifest out of temporary crowding but lack of food. At lower constant temperatures of 22 °C and 25 °C, cluster type aggregations may form but higher temperatures of 30° and 32 °C inhibit aggregation formation. Aggregations produced pupa with slightly heavier dry body weights and promoted developmental synchronization in ecdysis and greater likelihood of migration at emergence.
In the case of snakes, it is called shedding or ecdysis. Snakes will rub against rough surfaces to shed their skin. A shed skin is much longer than the snake that shed it, as the skin covers the top and bottom of each scale. If the skin is shed intact, each scale is unwrapped on the top and bottom side of the scale which almost doubles the length of the shed skin.
Pulses of 20-hydroxyecdysone occur during insect development, whereupon this hormone binds to the ecdysone receptor, a ligand-activated transcription factor found in the nuclei of insect cells. This in turn leads to the activation of many other genes, as evidenced by puffing of polytene chromosomes at over a hundred sites. Ultimately the activation cascade causes physiological changes that result in ecdysis (moulting). The temporal expression of ecdysone receptor within neural stem cells mediates temporal patterning and neural diversity.
When rain is delayed in spring, a bank of partly developed eggs in the soil may accumulate, leading to something of an explosion of emergence after good rain. Their lifecycles vary with climatic conditions and also with gender; males and female develop according to different schedules. Males are somewhat smaller than females and they undergo ecdysis only four times, after which they are ready for reproductive activity. They produce spermatophores mounted on fine stems well above the substrate surface.
Moulting of the skin (ecdysis) takes place regularly, around every 14 days, induced by the hormone ecdysone. The inner surface of the skin bears a hexagonal pattern. At each moult, the shed skin is replaced by the epidermis, which lies immediately beneath it; unlike the cuticula, this consists of living cells. Beneath this lies a thick layer of connective tissue, which is composed primarily of collagen fibres aligned either parallel or perpendicular to the body's longitudinal axis.
Secondary control of the JH titre found in the haemolymph of the developing insect is metabolic inactivation of JH by JH-specific esterase and juvenile hormone epoxide hydrolase. During ecdysis the form of the old cuticle laid down before the next moult is controlled by the JH level in the insect. JH maintains a juvenile state. The level gradually decreases during the development of the insect, allowing it to proceed to successive instars with each molt.
Development proceeds in repeated stages of growth and ecdysis (moulting); these stages are called instars. The juvenile forms closely resemble adults, but are smaller and lack adult features such as wings and genitalia. The size and morphological differences between nymphs in different instars are small, often just differences in body proportions and the number of segments; in later instars, external wing buds form. In holometabolous insects, immature stages are called larvae and differ markedly from adults.
The epidermis increases in size due to mitosis and then the new cuticle is produced. Enzymes secreted by the epidermal cells digest the old endocuticle, not affecting the old sclerotised exocuticle. #Ecdysis—this begins with the splitting of the old cuticle, usually starting in the midline of the thorax's dorsal side. The rupturing force is mostly from haemolymph pressure that has been forced into thorax by abdominal muscle contractions caused by the insect swallowing air or water.
Adult D. fallai live a relatively nomadic lifestyle, moving from tree to tree periodically. They are nocturnal in their general activities such as ecdysis, feeding, and oviposition, but mate during the day. They occur as solitary individuals and spend their day sitting among tree branches. Although D. fallai are one of the largest/heaviest insect species, they have relatively agile movements and are easily able to jump long distances up and down tree trunks and branches.
When the cell wall composition of A. parasiticum was analyzed, there was no chitin or cellulose detected, a result that supported the non-relatedness of Amoebidium to fungi. Secondly, experimentation on the nutritional requirements of A. parasiticum lead to the development of various media recipes that enabled the culturing of other trichomycete species. Thirdly, researchers had noted that amoebagenesis appeared to be triggered by ecdysis or death of the host arthropod based on their observations during dissections.Lichtwardt, R. W. 1986.
It is produced by cells in the proboscisMoths of Australia by I. F. B. Common, published January 1990 by CSIRO Publishing, via Google Books and exuded onto the galeae.PHYSIOLOGY OF INSECT ECDYSIS I. THE ECLOSION BEHAVIOUR OF SATURNIID MOTHS AND ITS HORMONAL RELEASE, from the Journal of Experimental Biology, by James W. Truman, vol. 54 (1971), pp 805-814 Its function is to weaken the fibers of the cocoon, thereby facilitating the emergence of the adult insect. It was discovered by Carroll Williams.
Chapter 3. PTTH also stimulates the corpora allata, a retrocerebral organ, to produce juvenile hormone, which prevents the development of adult characteristics during ecdysis. In holometabolous insects, molts between larval instars have a high level of juvenile hormone, the moult to the pupal stage has a low level of juvenile hormone, and the final, or imaginal, molt has no juvenile hormone present at all.Gullan, P.J. & Cranston, P.S. 6.3 Process and Control of Moulting in The Insects: An Outline of Entomology.
The larva passes through a further five naupliar stages by ecdysis, with increasing numbers of setae (bristles) appearing on the appendages at each stage. Around 41 hours after hatching, the larva moults into the first protozoea stage, by which time the body is long. The body is now differentiated into a cephalothorax and an abdomen, bears several thoracic appendages, and the larva now begins to ingest food. After a further two protozoea stages, the larva hatches into the first mysis stage.
In the head, thorax, or abdomen, tracheae may also be connected to air sacs. Many insects, such as grasshoppers and bees, which actively pump the air sacs in their abdomen, are able to control the flow of air through their body. In some aquatic insects, the tracheae exchange gas through the body wall directly, in the form of a gill, or function essentially as normal, via a plastron. Note that despite being internal, the tracheae of arthropods are shed during moulting (ecdysis).
A female that encounters such a spermatophore might take it up into her cloaca or simply eat it if she is not receptive. Rival males might each other's spermatophores or even their own after they have failed to attract any female and are no longer viable. The female sheds her skin nine times, but achieves sexual maturity in the sixth instar, that is, after the fifth ecdysis. The earlier instars last for only a matter of days, but the sexually functional instars for a fortnight or so.
The band was formed by Damian Herring and brothers Matt and Jamie Knox in 2009, with bassist Alex Kulick joining the band in 2016. While the band's debut album The Chills displayed a relatively traditional approach to the death metal genre, the band has since moved towards a more progressive metal sound, a development and style which has been compared with that of Death. The band's 2014 album Ecdysis and more recent albums have received critical acclaim from major publications such as Pitchfork, Decibel, Stereogum and Spin.
While three species of Eurypterus were purportedly discovered in China in 1957, the evidence of them belonging to the genus (or if they were even eurypterids at all) is nonexistent. No other traces of Eurypterus in modern continents from Gondwana are currently known. Eurypterus are very common fossils in their regions of occurrence, millions of specimens are possible in a given area, though access to the rock formations may be difficult. Most fossil eurypterids are the disjointed shed exoskeleton (known as exuviae) of individuals after molting (ecdysis).
Different developmental stages of ants within a colony process different kinds of food; larvae ingest solids, while adults ingest liquids, including larval excretions (The Ants). Immature individuals cannot pass from one larval stage to another or to adulthood without the help of adults; adults help immature individuals remove their old larval and/or pupal skins during ecdysis (molting). As larvae are relatively immobile, they only interact with nutrients as adults bring the nutrients to the larvae or the larvae to the nutrients. Bigger colonies do not necessarily produce a greater total reproductive biomass.
It generally darkens or otherwise gains colour as its exoskeleton hardens. Although the process of ecdysis is metabolically risky and expensive, it does have some advantages. For one thing it permits a complex development cycle of metamorphosis in which young animals may be totally different from older phases, such as the nauplius larvae of crustaceans, the nymphs of say, the Odonata, or the larvae of Endopterygota, such as maggots of flies. Such larval stages commonly have ecological and life cycle roles totally different from those of the mature animals.
Striptease and public nudity have been subject to legal and cultural prohibitions and other aesthetic considerations and taboos. Restrictions on venues may be through venue licensing requirements and constraints and a wide variety of national and local laws. These laws vary considerably around the world, and even between different parts of the same country. H. L. Mencken is credited with coining the word ecdysiast – from "ecdysis", meaning "to molt" – in response to a request from striptease artist Georgia Sothern, for a "more dignified" way to refer to her profession.
The most notable characteristic shared by ecdysozoans is a three-layered cuticle (four in Tardigrada) composed of organic material, which is periodically molted as the animal grows. This process of molting is called ecdysis, and gives the group its name. The ecdysozoans lack locomotory cilia and produce mostly amoeboid sperm, and their embryos do not undergo spiral cleavage as in most other protostomes. Ancestrally, the group exhibited sclerotized teeth within the foregut, and a ring of spines around the mouth opening, though these features have been secondarily lost in certain groups.
In fighting and killing the snake, the companions of the founder Cadmus all perished – leading to the term "Cadmean victory" (i.e. a victory involving one's own ruin). Rod of Asclepius, in which the snake, through ecdysis, symbolizes healing Three medical symbols involving snakes that are still used today are Bowl of Hygieia, symbolizing pharmacy, and the Caduceus and Rod of Asclepius, which are symbols denoting medicine in general. One of the etymologies proposed for the common female first name Linda is that it might derive from Old German Lindi or Linda, meaning a serpent.
A cockroach soon after ecdysis Cockroaches are social insects; a large number of species are either gregarious or inclined to aggregate, and a slightly smaller number exhibit parental care. It used to be thought that cockroaches aggregated because they were reacting to environmental cues, but it is now believed that pheromones are involved in these behaviors. Some species secrete these in their feces with gut microbial symbionts being involved, while others use glands located on their mandibles. Pheromones produced by the cuticle may enable cockroaches to distinguish between different populations of cockroach by odor.
Ticks pierce the skin of their hosts with specialized mouthparts to suck blood, and they survive exclusively by this obligate method of feeding. Some species of mites may be mistaken for larval ticks at infestations on animal hosts, but their feeding mechanisms are distinctive. All ticks have an incomplete metamorphosis: after hatching from the egg, a series of similar stages (instars) develops from a six-legged larva, to eight-legged nymph, and then a sexually developed, eight- legged adult. Between each stage is a molt (ecdysis), which enables the developing tick to expand within a new external skeleton.
Close-up of the head: the two eyes sit on eyestalks, with an antennule on either side of the rostrum (center, above the mouth) The carapace widths of mature Dungeness crabs may reach in some areas off the coast of Washington, but are typically under . They are a popular delicacy, and are the most commercially important crab in the Pacific Northwest, as well as the western states generally. The annual Dungeness Crab and Seafood Festival is held in Port Angeles, Washington each October. Dungeness crabs have a wide, long, hard shell, which they must periodically moult to grow; this process is called ecdysis.
Ecdysis occurs at least once during the active season. As the outer skin wears and the snake grows, the new skin forms underneath the old, including the eye scales which may turn a milky blue/white colour at this time — referred to as being 'in blue'. The blue-white colour comes from an oily secretion between the old and new skins; the snake's coloration will also look dull, as though the animal is dusty. This process affects the eyesight of the snakes and they do not move or hunt during this time; they are also, in common with most other snakes, more aggressive.
Trilobites, like brachiopods, crinoids, and corals, are found on all modern continents, and occupied every ancient ocean from which Paleozoic fossils have been collected. The remnants of trilobites can range from the preserved body to pieces of the exoskeleton, which it shed in the process known as ecdysis. In addition, the tracks left behind by trilobites living on the sea floor are often preserved as trace fossils. There are three main forms of trace fossils associated with trilobites: Rusophycus, Cruziana and Diplichnites—such trace fossils represent the preserved life activity of trilobites active upon the sea floor.
Interactive fiction author Emily Short wrote a favourable review, calling the game "strange and challenging, evocative and opaque like Lovecraft's own stories". However, Eliza Gauger's review for Destructoid criticised the parser as inadequate and the writing and pacing as inferior to those of Ecdysis, another contribution to the Project. In Make It Good (2009), the player controls a police detective investigating a murder in a house. Reviewers considered that this premise was inspired by Infocom's mysteries such as Deadline (1982), but that Ingold's detective was distinguished by his moral ambiguity and concealment of information from the player.
All isolates were proven to be highly virulent to fifth instar nymphs where the fungi caused 60-98% mortality 4-6 days after the nymphs were infected. In the treatments where M. anisopliae and B. bassiana were utilized, first instar nymphs were less sensitive to the effects of the fungi compared to older leaf hoppers. This is most likely due to the ability of the younger nymphs to shed the fungal spores through ecdysis. The fungus species P. fumosoroseus was observed to grow more rapidly on E. decipiens cadavers than any of the other fungi tested.
In preparation for ecdysis, the arthropod becomes inactive for a period of time, undergoing apolysis or separation of the old exoskeleton from the underlying epidermal cells. For most organisms, the resting period is a stage of preparation during which the secretion of fluid from the moulting glands of the epidermal layer and the loosening of the underpart of the cuticle occur. Once the old cuticle has separated from the epidermis, a digesting fluid is secreted into the space between them. However, this fluid remains inactive until the upper part of the new cuticle has been formed.
Ecdysis occurs at least once during the active season. As the outer skin wears and the snake grows, the new skin forms underneath the old, including the eye scales which may turn a milky blue/white colour at this time — referred to as being 'in blue'. The blue- white colour comes from an oily secretion between the old and new skins; the snake's coloration will also look dull, as though the animal is dusty. This process affects the eyesight of the snakes and they do not move or hunt during this time; they are also, in common with most other snakes, more aggressive.
Once the new cuticle has formed sufficiently, the animal splits the remaining parts of the old integument along built-in lines of weakness and sheds them in the visible process of ecdysis, generally shedding and discarding the epicuticle and the reduced exocuticle, though some species carry them along for camouflage or protection. The shed portions are called the exuviae. The animal then expands its body by swallowing liquid or gas and in the process it stretches the new integument to its proper size and shape. The new integument still is soft and usually is pale, and it is said to be teneral or callow.
Larval (left) and juvenile (right) instars of Strobilopterus (not to scale) Like all arthropods, eurypterids matured and grew through static developmental stages referred to as instars. These instars were punctuated by periods during which eurypterids went through ecdysis (molting of the cuticle) after which they underwent rapid and immediate growth. Some arthropods, such as insects and many crustaceans, undergo extreme changes over the course of maturing. Chelicerates, including eurypterids, are in general considered to be direct developers, undergoing no extreme changes after hatching (though extra body segments and extra limbs may be gained over the course of ontogeny in some lineages, such as xiphosurans and sea spiders).
Then, by crawling movements, the organism pushes forward in the old integumentary shell, which splits down the back allowing the animal to emerge. Often, this initial crack is caused by a combination of movement and increase in blood pressure within the body, forcing an expansion across its exoskeleton, leading to an eventual crack that allows for certain organisms such as spiders to extricate themselves. While the old cuticle is being digested, the new layer is secreted. All cuticular structures are shed at ecdysis, including the inner parts of the exoskeleton, which includes terminal linings of the alimentary tract and of the tracheae if they are present.
When the naiad is ready to metamorphose into an adult, it stops feeding and makes its way to the surface, generally at night. It remains stationary with its head out of the water, while its respiration system adapts to breathing air, then climbs up a reed or other emergent plant, and moults (ecdysis). Anchoring itself firmly in a vertical position with its claws, its skin begins to split at a weak spot behind the head. The adult dragonfly crawls out of its larval skin, the exuvia, arching backwards when all but the tip of its abdomen is free, to allow its exoskeleton to harden.
As mentioned, the integument, and in particular the cuticle, is the product of the single layer of columnar or cuboidal epithelial cells attached to the basement membrane. The cuticle provides muscular support and acts as a protective shield as the insect develops, but it is not in itself cellular, so once established it cannot grow and offers little scope for maintenance, renewal or increase in size as the animal grows. Therefore, the animal periodically sheds the external part of the cuticle in a process called moulting or ecdysis. As the time for moulting approaches, as much as possible of the exocuticle material is internally digested by enzymatic action and reabsorbed through the epithelial layer.
In the case of male crabs, the parasite causes the ventral abdominal plate to widen, which makes it more suitable for brooding, and alters the crab's behaviour so that it looks after the brood sac, despite this not being a normal behaviour for a male crab. Reproduction is completely suppressed in both male and female crabs which are effectively castrated. The barnacle seems able to take control of the timing of the crab's moult, extruding its brood sac immediately after ecdysis, when the crab's shell is soft. Suitable host crabs include the flatback mud crab (Eurypanopeus depressus), the Say's mud crab (Dyspanopeus sayi), the knotfinger mud crab (Panopeus lacustris), P. obessus, the furrowed mud crab (P.
Metroids are throughout the series shown to be highly adaptive to outside stimuli. The original Metroid established that exposure to beta rays would cause Metroids to multiply very quickly. Metroid II: Return of Samus and the remake Metroid: Samus Returns established a five-stage life cycle in which those Metroids native to their home planet SR388 go through two stages of ecdysis followed by two stages of mutation, thus maturing through five previously unknown forms: Alpha Metroid, Gamma Metroid, Zeta Metroid, Omega Metroid, and the uncommon Queen Metroid (the latter as the primary antagonist of the game). They are frequently shown to be vulnerable to ice- based weaponry such as the Ice Beam and freeze guns.
Amblyomma variegatum, commonly known as the tropical bont tick, is a species of tick of the genus Amblyomma endemic to Africa. It has spread from its centre of origin to several countries, including the Caribbean islands, where it is known as the Senegalese tick (due to the suspected introduction of the tick from cattle imports from that country) and the Antigua gold tick. They are vividly coloured (especially the males) and have a substantial impact on livestock, primarily through their transmission of diseases. They are three- host hard ticks (where each life stage completes a blood meal on a particular host before dropping off and ecdysis) that have been found on a variety of domesticated species such camels, cattle, goats, sheep, dogs, and various species of wildlife.
The second instar is completely different in appearance and behavior, often becoming grub- or maggot-like in the instars before pupation. As a rule, the instars after the first ecdysis are of more or less constant form and not highly mobile, being specialised for feeding and growth until the final larval instar metamorphoses into the pupal form. There are examples of holometabolic species in which there are certain striking differences between the earliest instars and the later instars, though without their generally being regarded as hypermetamorphic. For example, early instars of many Papilionidae are of a colour, shape and texture that suggest bird droppings; later instars that are larger and would simply stand out in such camouflage, typically become leaf- green.
The nymph extends its hinged labium (a toothed mouthpart similar to a lower mandible, which is sometimes termed as a "mask" as it is normally folded and held before the face) that can extend forward and retract rapidly to capture prey such as mosquito larvae, tadpoles, and small fish. They breathe through gills in their rectum, and can rapidly propel themselves by suddenly expelling water through the anus. Some naiads, such as the later stages of Antipodophlebia asthenes, hunt on land. Ecdysis: Emperor dragonfly, Anax imperator, newly emerged and still soft, holding on to its dry exuvia, and expanding its wings The larval stage of dragonflies lasts up to five years in large species, and between two months and three years in smaller species.
Adult Polish cochineal, male (left) and female; from Wolfe (1766) In mid-July, the female Polish cochineal lays approximately 600-700 eggs, encased with a white waxy ootheca, in the ground. When the larvae hatch in late August or early September, they do not leave the egg case but remain inside until the end of winter. In late March or early April, the larvae emerge from the ground to feed for a short time on the low-growing leaves of the host plant before returning underground to feed on the plant's roots. At this point, the larvae undergo ecdysis, shedding their exoskeletons together with their legs and antennae, and they encyst by forming outer protective coatings (cysts) within the root tissues.
At temperatures of 16 °C and below, the growth rate is considerably decreased, with an average length of adult stadia (i.e., the time between two consecutive mouldings) of 126 days as compared to 15 days at 29 °C. 16 °C can therefore be seen as limiting temperature for active feeding and growth. Torpor sets in at a temperature of 13 °C, and at 11 °C, ecdysis stops. Nymphs are much more sensitive to cold: at a temperature of 1 °C, second instar larvae die within two days, whereas adult specimens can survive several months. At 21 °C, egg development takes on average 49 days, which decreases with higher temperatures; at 29.5 °C, hatching occurs after 20 days. At 21 °C, the first larval instar is on average 9 days long, which is reduced to 5 days at temperatures of 24 °C and above. Prolonged temperatures above 24 °C are eventually fatal for gray silverfish: At 26 °C, the survival is 4 months, and at temperatures of 29 to 33.6 °C, survival time drops to 1–3 weeks.
A striking example of phoresy is that planidia of beetles of the genus Meloe will form a group and produce a pheromone that mimics the sex attractant of its host bee species; when the male bee arrives and attempts to mate with the mass of larvae, they climb onto his abdomen, and from there they transfer in turn to a female bee, and finally to the bee nest, where they attack the bee larvae as their hosts. It is common for planidia to molt shortly after entering the host body or nest, but some species postpone further development while the host larva grows. Whether after a delay or not, the first ecdysis changes the planidial form into an extra larval form that is practically unrecognisably different from the planidium; this reflects the lapsed need for the larva to wander any further, together with an increased need for efficiency in feeding. The changes in morphology usually include de- sclerotization, and loss of the legs and eyes of the larvae.

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