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Journal articles on the topic 'Metamorphosis'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Youson, J. H., J. A. Holmes, J. A. Guchardi, et al. "Importance of Condition Factor and the Influence of Water Temperature and Photoperiod on Metamorphosis of Sea Lamprey Petromyzon marinus." Canadian Journal of Fisheries and Aquatic Sciences 50, no. 11 (1993): 2448–56. http://dx.doi.org/10.1139/f93-269.

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The incidence of metamorphosis of larval sea lamprey, Petromyzon marinus, was strongly affected by water temperature but not photoperiod. In a 1991 experiment, the development of metamorphosing animals in 13 °C water was retarded about 1 mo relative to animals metamorphosing at 21 °C and to a population from the Chippewa River, Michigan; the minimum length, weight, and condition factor (CF) of metamorphosing experimental animals were 117 mm, 2.8 g, and 1.50, respectively, and only 4% metamorphosed at 13 °C and 18.9% at 21 °C. In 1992, with a population from the Great Chazy River, New York, 66%

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2

Holmes, J. A., F. W. H. Beamish, J. G. Seelye, S. A. Sower, and J. H. Youson. "Long-term Influence of Water Temperature, Photoperiod, and Food Deprivation on Metamorphosis of Sea Lamprey, Petromyzon marinus." Canadian Journal of Fisheries and Aquatic Sciences 51, no. 9 (1994): 2045–51. http://dx.doi.org/10.1139/f94-207.

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After 11 mo in the laboratory, significantly more sea lamprey, Petromyzon marinus, larvae from the Chippewa River, Michigan, metamorphosed in an ambient temperature regime (3 ± 2 animals∙tank−1) compared with a fixed 21 °C temperature (0 animals); photoperiod and food deprivation did not have detectable effects on the incidence of metamorphosis. Metamorphosing animals in our laboratory study were significantly smaller in size (length and weight) and had a lower condition factor (CF) than animals from the same population that metamorphosed a year earlier under field and shorter term laboratory

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3

Holmes, John A., Helen Chu, Syeda A. Khanam, Richard G. Manzon, and John H. Youson. "Spontaneous and induced metamorphosis in the American brook lamprey, Lampetra appendix." Canadian Journal of Zoology 77, no. 6 (1999): 959–71. http://dx.doi.org/10.1139/z99-056.

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We described the seven stages of spontaneous metamorphosis in the American brook lamprey (Lampetra appendix) and assessed the importance of size as a determinant of spontaneous and induced metamorphosis. Serum concentrations of the thyroid hormones (TH) thyroxine (T4) and triiodothyronine (T3) were measured in metamorphosing and nonmetamorphosing L. appendix. The sequence of stages in metamorphosis and changes in the relative lengths of most body regions were consistent with data reported for other lamprey species. However, premetamorphic and metamorphosing L. appendix in the early stages of m

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Pronych, Scott, and Richard Wassersug. "Lung use and development in Xenopus laevis tadpoles." Canadian Journal of Zoology 72, no. 4 (1994): 738–43. http://dx.doi.org/10.1139/z94-099.

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Shortly after hatching, Xenopus laevis tadpoles fill their lungs with air. We examined the role played by early lung use in these organisms, since they are able to respire with both their lungs and their gills. We investigated the effect on X. laevis development when the larvae were prevented from inflating their lungs, and whether early lung use influenced the size of the lungs or the tadpole's ability to metamorphose. Tadpoles that were denied access to air had lungs one-half the size of those of controls. This difference in lung size was too large to be explained merely by a stretching of t

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Iwai, Noriko, and Kiyomi Yasumiba. "Field variations in mass at metamorphosis in a stream frog, Odorrana splendida, and their relationship with the stream environment." Animal Biology 71, no. 3 (2021): 297–310. http://dx.doi.org/10.1163/15707563-bja10053.

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Abstract Animals with complex life cycles, such as amphibians, shift their habitats when they metamorphose. Metamorphosing traits (e.g., size at, and timing of, metamorphosis) at an early stage can affect the growth, reproduction, and survival in the adult stage. Thus, metamorphosing traits are important factors that affect the fitness of the individuals. Although size at metamorphosis in the field has been investigated in amphibians, its relationship with environmental factors has been scarce. We aimed to quantify variations in the mass at metamorphosis of a stream frog, Odorrana splendida, a

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Byrne, Isabel, Robyn Thomson, Rory Thomson, Duncan Murray-Uren, and J. Roger Downie. "Observations on metamorphosing tadpoles of Hyalinobatrachium orientale (Anura: Centrolenidae)." Phyllomedusa: Journal of Herpetology 19, no. 2 (2020): 217–23. http://dx.doi.org/10.11606/issn.2316-9079.v19i2p217-223.

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Observations on metamorphosing tadpoles of Hyalinobatrachium orientale (Anura: Centrolenidae). Metamorphosis, when anuran amphibians resorb their tails and remodel their mouthparts and internal organs, is a vulnerable stage in the frog’s life history. As larvae metamorphose from tadpoles to adult frogs, they are neither suited to aquatic life nor ready for active terrestrial life. Previous studies have examined the duration of metamorphosis in a range of species, with respect to tadpole size, habitat, and other factors; however, the duration of metamorphosis relative to where it takes place ha

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7

Zaks, Lev A. "The Aesthetic as a Field and Object of Cultural Metamorphoses." Bulletin of Liberal Arts University 12, no. 2 (2024): 167–77. https://doi.org/10.35853/vestnik.gu.2024.12-2.11.

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The article addresses the problem of the socio-cultural reality of the aesthetic as field and result/object of metamorphosis, something that has not been much developed in aesthetics. The paper is of the aesthetic-culturological nature: it joints the culturological vision of metamorphosis as a general phenomenon of culture - a special kind of cultural change, transformation, development of cultural phenomena in some of the most important aspects of its world). The author establishes the ontological foundations of cultural systematics - taking into account the specificity of metamorphoses of ae

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8

Chelgren, Nathan D., Daniel K. Rosenberg, Selina S. Heppell, and Alix I. Gitelman. "Individual variation affects departure rate from the natal pond in an ephemeral pond-breeding anuran." Canadian Journal of Zoology 86, no. 4 (2008): 260–67. http://dx.doi.org/10.1139/z08-003.

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Frogs exhibit extreme plasticity and individual variation in growth and behavior during metamorphosis, driven by interactions of intrinsic state factors and extrinsic environmental factors. In northern red-legged frogs ( Rana aurora Baird and Girard, 1852), we studied the timing of departure from the natal pond as it relates to date and size of individuals at metamorphosis in the context of environmental uncertainty. To affect body size at metamorphosis, we manipulated food availability during the larval stage for a sample (317) of 1045 uniquely marked individuals and released them at their na

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9

Chambers, R. Christopher, and William C. Leggett. "Size and Age at Metamorphosis in Marine Fishes: An Analysis of Laboratory-Reared Winter Flounder (Pseudopleutonectes americanus) with a Review of Variation in Other Species." Canadian Journal of Fisheries and Aquatic Sciences 44, no. 11 (1987): 1936–47. http://dx.doi.org/10.1139/f87-238.

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Offspring of adult winter flounder (Pseudopleuronectes americanus) collected from Conception Bay, Newfoundland, were reared from fertilization to metamorphosis. We tested two hypotheses: 1) length and age at metamorphosis are equally variable among individuals and (2) length and age at metamorphosis are not correlated. Length at metamorphosis was significantly less variable than age at metamorphosis when data from all laboratory populations were pooled and in 15 of 18 populations. Coefficients of variation for length and age at metamorphosis for the pooled data were 0.051 and 0.123, respective

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10

Foresti, M. "Metamorphoses: The Place of Moving Images." Garage Journal, no. 04 (November 30, 2021): 66–89. https://doi.org/10.35074/gj.2021.50.16.006.

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The migration of film from cinemas to art institutions engendered a series of metamorphoses. A metamorphosis of the medium, through the convergence of film and installation, produced the moving image. A metamorphosis of the space within the screen itself transformed the spectators’ reception of this new language of the moving image. A metamorphosis of the exhibition space resulted from its relation to the new medium. These metamorphoses require museums to redefine the ways in which they can empower their audiences through effective curatorship. This research article analyzes these transformati

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11

Rao, Xiaozhen, and Gang Lin. "Effects of age, salinity and temperature on the metamorphosis and survival of Capitulum mitella cyprids (Cirripedia: Thoracica: Scalpellomorpha)." Journal of the Marine Biological Association of the United Kingdom 100, no. 1 (2020): 55–62. http://dx.doi.org/10.1017/s0025315419001152.

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AbstractCapitulum mitella is a tropical/sub-tropical intertidal barnacle of high economic value. However, no studies have yet focused on the effects of the extrinsic and intrinsic factors that affect the metamorphosis of this species. The current study stored cyprids at room temperature (24–26°C) and low temperature (7°C) and then compared the effects of age and storage temperature on cyprid metamorphosis. The effects of salinity and temperature on cyprid metamorphosis and survival were examined. Results showed the following. (1) Young 0-day cyprids were not competent to metamorphose, and C. m

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12

Baird, Andrew H., and Aileen N. C. Morse. "Induction of metamorphosis in larvae of the brooding corals Acropora palifera and Stylophora pistillata." Marine and Freshwater Research 55, no. 5 (2004): 469. http://dx.doi.org/10.1071/mf03121.

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Many coral larvae require surface contact with crustose red algae (CRA) to induce metamorphosis; however, many features of the ecology of pocilloporid corals, such as their ability to colonize primary substrata, suggest that their larvae respond to different cues. We compared the metamorphosis of larvae of the brooding corals Stylophora pistillata (family Pocilloporidae) and Acropora palifera (family Acroporidae) in response to a variety of environmental cues. Acropora palifera metamorphosed only in the presence of three species of CRA. In contrast, S. pistillata metamorphosed in all assays, e

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13

Mathiron, Anthony G. E., Jean-Paul Lena, Sarah Baouch, and Mathieu Denoël. "The ‘male escape hypothesis’: sex-biased metamorphosis in response to climatic drivers in a facultatively paedomorphic amphibian." Proceedings of the Royal Society B: Biological Sciences 284, no. 1853 (2017): 20170176. http://dx.doi.org/10.1098/rspb.2017.0176.

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Paedomorphosis is a major evolutionary process that bypasses metamorphosis and allows reproduction in larvae. In newts and salamanders, it can be facultative with paedomorphs retaining gills and metamorphs dispersing. The evolution of these developmental processes is thought to have been driven by the costs and benefits of inhabiting aquatic versus terrestrial habitats. In this context, we aimed at testing the hypothesis that climatic drivers affect phenotypic transition and the difference across sexes because sex-ratio is biased in natural populations. Through a replicated laboratory experime

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DARE, O. K., and M. R. FORBES. "Rates of development in male and female Wood Frogs and patterns of parasitism by lung nematodes." Parasitology 135, no. 3 (2007): 385–93. http://dx.doi.org/10.1017/s0031182007003836.

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SUMMARYResearchers are becoming interested in testing whether investment in growth and/or development trades off against investment in parasite defence. We tested this idea by examining relations between development of Wood Frogs (Rana sylvatica) and susceptibility to lung nematodes (Rhabdias ranae). Male and female frogs reared in outdoor mesocosms were the same length and mass at metamorphosis. However, males metamorphosed sooner than females. Lung nematodes were no more likely to penetrate male versus female metamorphs following controlled exposures, but males had higher intensities of adul

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15

Licht, Lawrence E. "The effect of food level on growth rate and frequency of metamorphosis and paedomorphosis in Ambystoma gracile." Canadian Journal of Zoology 70, no. 1 (1992): 87–93. http://dx.doi.org/10.1139/z92-013.

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The effect of food level on larval growth response and frequency of metamorphosis and paedomorphosis was examined in Ambystoma gracile from high- and low-elevation populations in British Columbia. Larvae that eventually metamorphosed and those that became paedomorphic did not differ in growth rates when fed equal quantities of food. Body size at metamorphosis did not differ between fast- and slow-growing larvae, but larvae fed high levels of food metamorphosed sooner than those fed less. Food level had no effect on the frequency of metamorphosis and paedomorphosis. Larvae of different sexes di

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16

Porter, David H. "Metamorphoses and Metamorphosis: A Brief Response." American Journal of Philology 124, no. 3 (2003): 473–76. http://dx.doi.org/10.1353/ajp.2003.0050.

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17

Holmes, John A., and John H. Youson. "Fall condition factor and temperature influence the incidence of metamorphosis in sea lampreys, Petromyzon marinus." Canadian Journal of Zoology 72, no. 6 (1994): 1134–40. http://dx.doi.org/10.1139/z94-151.

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Larval sea lampreys of immediate premetamorphic size (at least 120 mm and 3.0 g) were subjected to ambient or constant 21 °C temperature regimes for 9 months to investigate the influence of temperature and a fall condition factor (CF) of 1.50 or greater on the incidence of metamorphosis the following summer. The incidence of metamorphosis was 53% in the ambient temperature regime (29/55) and only 2% (1/55) in the constant temperature regime. About 64% (7/11) of the presumptively metamorphic larvae in the ambient temperature regime entered metamorphosis compared with 10% (1/10) in the constant

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18

Doughty, Paul, and J. Dale Roberts. "Plasticity in age and size at metamorphosis of Crinia georgiana tadpoles: responses to variation in food levels and deteriorating conditions during development." Australian Journal of Zoology 51, no. 3 (2003): 271. http://dx.doi.org/10.1071/zo02075.

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Adaptive phenotypic plasticity in life-history traits is predicted to evolve when populations occur in heterogeneous environments. Anuran larvae of many species cannot escape their aquatic environment until metamorphosis and therefore should show plasticity in response to conditions experienced as tadpoles. In this study, we manipulated the aquatic environments of Crinia georgiana tadpoles in the laboratory to mimic variation among ponds in resources and drying conditions in nature. This species breeds in very shallow water in winter and ponds frequently dry between bouts of rain, especially t

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19

Rollins-Smith, Louise A., Patrick J. Blair, and A. Tray Davis. "Thymus Ontogeny in Frogs: T-Cell Renewal at Metamorphosis." Developmental Immunology 2, no. 3 (1992): 207–13. http://dx.doi.org/10.1155/1992/26251.

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Metamorphosis in amphibians presents a unique problem for the developing immune system. Because tadpoles are free-living, they need an immune system to protect against potential pathogens. However, at metamorphosis, they acquire a variety of new adultspecific molecules to which the tadpole immune system must become tolerant. We hypothesized thatXenopus laevistadpoles may avoid potentially destructive antiself responses by largely discarding the larval immune system at metamorphosis and acquiring a new one. By implanting triploid (3N) thymuses into diploid (2N) hosts, we examined the influx and

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Lin, Gang, and Xiaozhen Rao. "Metamorphosis of the Pedunculate Barnacle Capitulum mitella Linnaeus, 1758 (Cirripedia: Scalpelliformes)." Journal of the Marine Biological Association of the United Kingdom 97, no. 8 (2016): 1643–50. http://dx.doi.org/10.1017/s0025315416001089.

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In this paper, metamorphosis of laboratory-reared cyprids of the pedunculate cirripede, Capitulum mitella was successfully induced. A timeline and a detailed description of morphological events during metamorphosis were derived from light microscopy and scanning electron microscopy analyses. The metamorphic process of cyprids involves five main events. (1) Triggering of metamorphosis: after 0–6 h of reagent exposure, the epidermis ventral to the compound eyes gradually invaginates. (2) Invagination and separation of epidermis: after 6–36 h, the invagination bypasses the compound eyes, the cypr

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Usmanova, Shoira Rustamovna. "The Application Of The Method Of Metamorphosis In The Folklore Of The Peoples Of The East." Psychology and Education Journal 58, no. 1 (2021): 1033–42. http://dx.doi.org/10.17762/pae.v58i1.852.

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In recent years, interdisciplinary research, including folklore, ethnography, linguoculturology and other disciplines, has been expanding. The complex study of materials related to various sciences ensures the complementarity of the fields of science, contributes to a deeper and more systematic understanding of the phenomena of language and culture. In particular, the comparative study of the specific motives and methods in the discourse of mythological traditions and fairy tales in folklore texts serves to determine the way of thinking, mentality and imagination of different peoples. Th

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Da Silva Martins, Ana Glaucia, Raoni Rebouças, Isaias Santos, Adão Henrique Rosa Domingos, and Luís Felipe Toledo. "Influence of tail injury on the development of Neotropical elegant treefrog tadpoles." Acta Herpetologica 17, no. 1 (2022): 13–20. http://dx.doi.org/10.36253/a_h-11453.

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Anuran larvae in aquatic environments are important prey items for several vertebrate and invertebrate species. Besides avoiding predation, there are some strategies that may reduce the physical damage in those tadpoles that survive the predation attempt. For example, the injured tadpole tail can regrow after a predator bite, but few studies have examined the consequences of such injury. We examined the consequences of three levels of injury to the tail and how this influenced development and feeding behavior of tadpoles of the Neotropical elegant treefrog, Dendropsophus elegans. We collected

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23

Sacks, Edward S. "Theater, Performance, and Illusion in Ovid Metamorphoses 11." Illinois Classical Studies 47, no. 1 (2022): 102–31. http://dx.doi.org/10.5406/23285265.47.1.05.

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Abstract Themes of theater, performance, and illusion course through Metamorphoses 11. The theme of “theater” and its disintegration is established in the opening Orpheus episode and culminates in Ceyx-Alcyone, where Morpheus's self-conscious acting in Alcyone's dream shatters the usual harmony between actor and role. The unveiling of theater is also connected with the unveiling of metamorphosis. This latter disruption, in the Peleus-Thetis episode, involves crucial disclosures about metamorphosis by one metamorphic deity Proteus to defeat the transformations of another (Thetis). These disinte

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Rahman, M. Aminur, Fatimah Md Yusoff, A. Arshad, and Tsuyoshi Uehara. "Effects of Delayed Metamorphosis on Larval Survival, Metamorphosis, and Juvenile Performance of Four Closely Related Species of Tropical Sea Urchins (GenusEchinometra)." Scientific World Journal 2014 (2014): 1–11. http://dx.doi.org/10.1155/2014/918028.

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We report here, the effects of extended competency on larval survival, metamorphosis, and postlarval juvenile growth of four closely related species of tropical sea urchins,Echinometrasp. A (Ea),E. mathaei(Em),Echinometrasp. C (Ec), andE. oblonga(Eo). Planktotrophic larvae of all four species fed on cultured phytoplankton (Chaetoceros gracilis) attained metamorphic competence within 22–24 days after fertilization. Competent larvae were forced to delay metamorphosis for up to 5 months by preventing them from settling in culture bottles with continuous stirring on a set of 10 rpm rotating roller

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Kawashima. "Metamorphosis as Origin–Koji Yamamura’s Short Animation Franz Kafka’s A Country Doctor." Arts 8, no. 2 (2019): 54. http://dx.doi.org/10.3390/arts8020054.

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In the beginning was metamorphosis. This paradoxical thought, which the ancient Roman poet Ovidius and modern author Franz Kafka represented in their literary works, is visualized in Koji Yamamura’s short animation Franz Kafka’s A Country Doctor. Diverse metamorphoses that do and do not appear in the Kafka original are so elaborately and dynamically depicted in this animation that no live-action film could possibly represent them. In addition, the film itself can be seen as a metamorphosis, as it is an animation converted from a short story. Such a dominance of metamorphosis is also true for t

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Possamaï-Pérez, Marylène. "L’Ovide moralisé du XIVe siècle : mort ou renaissance des Métamorphoses d’Ovide ?" Acta Universitatis Lodziensis. Folia Litteraria Romanica, no. 9 (January 1, 2014): 7–15. https://doi.org/10.18778/1505-9065.9.02.

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The Ovide moralisé, anonymous poem from the beginning of the 14th century, is the first complete translation in vernacular language of Ovid’s Metamorphoses: in this sense, this text resurrects the ovidian poem, gives it life for all the lay people who did not read the latin. But this translation is for its author as the pretext for another rewrite, thematic and axiological transposition. Moreover, the “translator” often bends his source text to make it more consistent with interpretation (especially the “Christian” one) he intends to give it in a second time: can we then consider that this ver

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Eri, R., J. M. Arnold, V. F. Hinman, et al. "Hemps, a novel EGF-like protein, plays a central role in ascidian metamorphosis." Development 126, no. 24 (1999): 5809–18. http://dx.doi.org/10.1242/dev.126.24.5809.

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All chordates share several characteristic features including a dorsal hollow neural tube, a notochord, a pharynx and an endostyle. Unlike other chordate taxa, ascidians have a biphasic life-history with two distinct body plans. During metamorphosis, the larval nerve cord and notochord degenerate and the pharyngeal gill slits and endostyle form. While ascidians, like other marine invertebrates, metamorphose in response to specific environmental cues, it remains unclear how these cues trigger metamorphosis. We have identified a novel gene (Hemps) which encodes a protein with a putative secretio

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Todd, Christopher D., Matthew G. Bentley, and Jonathan N. Havenhand. "Larval metamorphosis of the opisthobranch molluscAdalaria proxima(Gastropoda: Nudibranchia): the effects of choline and elevated potassium ion concentration." Journal of the Marine Biological Association of the United Kingdom 71, no. 1 (1991): 53–72. http://dx.doi.org/10.1017/s0025315400037395.

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Veliger larvae of the nudibranch molluscAdalaria proximaare triggered to metamorphose to the benthic form by the adult prey bryozoan,Electro pilosa.Ion substitution and supplementation experiments with artificial sea water (ASW) have, however, shown that metamorphosis can be induced by elevation of the potassium ion concentration alone. Approximately 19 mM K+ASW (10 mM ‘excess’) was found to elicit maximal metamorphic responses: 29 and 39 mM K+ASW had no inductive effect. Choline chloride was also found to induce metamorphosis in a dose-dependent manner, with lO M ineffective, 10 M approximate

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Bellés, Xavier, and Takaaki Daimon. "What triggers metamorphosis in cave insects with contracted life cycle? A work program." Suplementos del Boletín de la Asociación española de Entomología 4 (November 15, 2022): 116–21. https://doi.org/10.70186/sbaeeearh1584.

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Usually, the time of metamorphosis in insects is determined when the individual reaches a critical weight (CW) in the preimaginal stage. However, there are highly specialized cave-dwelling beetles that have only a single larval instar, which, instead of gaining weight during development until metamorphosis, loses it. We propose several mechanisms by which these species could reach the CW and metamorphose. For example, the CW could be reached not through an increase, but the other way around, a decrease in weight, or a related parameter, after which the mechanisms that trigger metamorphosis wou

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Watkins, T. B. "The effect of metamorphosis on the repeatability of maximal locomotor performance in the Pacific tree frog Hyla regilla." Journal of Experimental Biology 200, no. 20 (1997): 2663–68. http://dx.doi.org/10.1242/jeb.200.20.2663.

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Measuring the repeatability of inter-individual differences in locomotor performance is an important first step in elucidating both the functional causes and the ecological consequences of performance variation. Thus, repeatability of whole-animal performance traits provides a crucial link between functional and evolutionary biology. In the present study, repeatability of maximal burst locomotor performance was estimated for a single population of the Pacific tree frog Hyla regilla. Animals were reared individually from eggs through metamorphosis in the laboratory. Maximum burst swimming speed

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McWilliam, Paulette S., and Bruce F. Phillips. "Metamorphosis of the final phyllosoma and secondary lecithotrophy in the puerulus of Panulirus cygnus George: a review." Marine and Freshwater Research 48, no. 8 (1997): 783. http://dx.doi.org/10.1071/mf97159.

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The final phyllosoma of Panulirus cygnus metamorphoses to a non-feeding puerulus that lives on energy reserves accumulated in the final larva, and the metamorphic moult occurs mainly in the slope region adjoining the shelf-break off Western Australia. A review of the literature on field studies, laboratory rearing and nutritional studies of phyllosomal and other decapod zoeal larvae provided no evidence that metamorphosis in P. cygnus (or other shallow-water palinurids) is triggered by a direct environmental cue. It did indicate that metamorphosis results from the culmination of sustained nutr

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Kuzmin, Sergius L. "Feeding of amphibians during metamorphosis." Amphibia-Reptilia 18, no. 2 (1997): 121–31. http://dx.doi.org/10.1163/156853897x00017.

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AbstractThe feeding ecology of 28 amphibian species with complete life cycles has been studied from the last pre-metamorphic stages to metamorphosed juveniles. The widespread view that feeding ceases completely during metamorphosis is not confirmed. Generally, however, amphibian feeding rate decreases at metamorphosis. Foraging in Caudata either does not cease (Hynobiidae, rheophilous Salamandridae) or ceases only before the end of transformation, which takes less than one metamorphic stage. The cessation of foraging in Anura coincides with the transformation of the mouth and digestive tract a

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Watters, G. Thomas. "Glochidial metamorphosis of the freshwater mussel Lampsilis cardium (Bivalvia: Unionidae) on larval tiger salamanders, Ambystoma tigrinum ssp. (Amphibia: Ambystomidae)." Canadian Journal of Zoology 75, no. 3 (1997): 505–8. http://dx.doi.org/10.1139/z97-062.

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Larval tiger salamanders (Ambystoma tigrinum ssp.) were infected with glochidia of the freshwater mussel Lampsilis cardium in laboratory experiments. At 20–21 °C, metamorphosis occurred from 9 to 39 days, primarily between 9 and 17 days. The percentage of attached glochidia that metamorphosed varied from 0.27 to 15.7%. Metamorphosis on the salamanders occurred more quickly than on a known piscine host, largemouth bass (Micropterus salmoides), but a smaller percentage of the total attached glochidia metamorphosed. The role of amphibians as hosts of freshwater mussels in North America has not be

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Băncilă, Raluca Ioana, Florina Stănescu, Rodica Plăiaşu, et al. "Food and light availability induce plastic responses in fire salamander larvae from contrasting environments." PeerJ 11 (October 4, 2023): e16046. http://dx.doi.org/10.7717/peerj.16046.

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Phenotypic plasticity has been proposed as a mechanism facilitating the colonisation and adaptation to novel environments, such as caves. However, phenotypic plasticity in subterranean environments remains largely unexplored. Here, we test for plasticity in growth and development of fire salamander larvae (Salamandra salamandra) from subterranean and surface habitats, in response to contrasting food availability and light conditions. We hypothesized that: (i) low food availability and absence of light decrease larval growth and delay metamorphosis, (ii) light conditions mediate the effects of

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Beachy, Christopher, and Richard Bruce. "Life history of a small form of the plethodontid salamander Desmognathus quadramaculatus." Amphibia-Reptilia 24, no. 1 (2003): 13–26. http://dx.doi.org/10.1163/156853803763806902.

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AbstractWe sampled Desmognathus quadramaculatus, one of the largest species of plethodontid salamanders in eastern North America, from a population exhibiting extremely small adult body sizes in the Bald Mountains of North Carolina (USA). In order to test the hypothesis that miniaturization in desmognathine salamanders is due to early metamorphosis and maturation, we estimated ages and sizes at metamorphosis and maturation. Analysis of size-frequency distributions suggests that most larvae metamorphose after 24 months, with the remainder metamorphosing after 36. The minimum age of sexually mat

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Webster, Nicole S., Luke D. Smith, Andrew J. Heyward, et al. "Metamorphosis of a Scleractinian Coral in Response to Microbial Biofilms." Applied and Environmental Microbiology 70, no. 2 (2004): 1213–21. http://dx.doi.org/10.1128/aem.70.2.1213-1221.2004.

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ABSTRACT Microorganisms have been reported to induce settlement and metamorphosis in a wide range of marine invertebrate species. However, the primary cue reported for metamorphosis of coral larvae is calcareous coralline algae (CCA). Herein we report the community structure of developing coral reef biofilms and the potential role they play in triggering the metamorphosis of a scleractinian coral. Two-week-old biofilms induced metamorphosis in less than 10% of larvae, whereas metamorphosis increased significantly on older biofilms, with a maximum of 41% occurring on 8-week-old microbial films.

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Lochet, Aude, J. Ellen Marsden, Brian J. Fryer, and Stuart A. Ludsin. "Instability of statolith elemental signatures revealed in newly metamorphosed sea lamprey (Petromyzon marinus)." Canadian Journal of Fisheries and Aquatic Sciences 70, no. 4 (2013): 565–73. http://dx.doi.org/10.1139/cjfas-2012-0410.

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Techniques that use calcified structures to identify the natal origin of organisms assume that reworking of previously deposited material does not occur. While verified for otoliths, this assumption remains unverified for statoliths. Herein, we test the stability of sea lamprey (Petromyzon marinus) statolith microchemistry during metamorphosis. Using laser ablation inductively coupled plasma mass spectrometry, we quantified the concentrations of nine elements in statoliths from sea lamprey larvae (n = 118) and newly metamorphosed (n = 115) individuals that were collected across six tributaries

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Gavrić, Jelena P., Svetlana G. Despotović, Branka R. Gavrilović, et al. "Oxidative Stress Parameters in Goitrogen-Exposed Crested Newt Larvae (Triturus spp.): Arrested Metamorphosis." International Journal of Environmental Research and Public Health 18, no. 18 (2021): 9653. http://dx.doi.org/10.3390/ijerph18189653.

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Thiourea is an established disruptor of thyroid hormone synthesis and is frequently used as an inhibitor of metamorphosis. The changes caused by thiourea can affect processes associated with the oxidative status of individuals (metabolic rate, the HPI axis, antioxidant system). We investigated the parameters of oxidative stress in crested newt (Triturus spp.) larvae during normal development in late larval stage 62 and newly metamorphosed individuals, and during thiourea-stimulated metamorphosis arrest in individuals exposed to low (0.05%) and high (0.1%) concentrations of thiourea. Both group

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Shikuma, Nicholas J., Igor Antoshechkin, João M. Medeiros, Martin Pilhofer, and Dianne K. Newman. "Stepwise metamorphosis of the tubewormHydroides elegansis mediated by a bacterial inducer and MAPK signaling." Proceedings of the National Academy of Sciences 113, no. 36 (2016): 10097–102. http://dx.doi.org/10.1073/pnas.1603142113.

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Diverse animal taxa metamorphose between larval and juvenile phases in response to bacteria. Although bacteria-induced metamorphosis is widespread among metazoans, little is known about the molecular changes that occur in the animal upon stimulation by bacteria. Larvae of the tubewormHydroides elegansmetamorphose in response to surface-boundPseudoalteromonas luteoviolaceabacteria, producing ordered arrays of phage tail-like metamorphosis-associated contractile structures (MACs). Sequencing theHydroidesgenome and transcripts during five developmental stages revealed that MACs induce the regulat

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Pawlik, Joseph R. "Larval settlement and metamorphosis of two gregarious sabellariid polychaetes:Sabellaria alveolatacompared withPhragmatopoma californica." Journal of the Marine Biological Association of the United Kingdom 68, no. 1 (1988): 101–24. http://dx.doi.org/10.1017/s002531540005013x.

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Two sabellariid polychaetes,Sabellaria alveolatafrom European waters andPhragmatopoma californicafrom the west coast of North America, are known from previous work to have larvae that settle and metamorphose preferentially on the cemented sand tubes of conspecific adults. The naturally occurring inducers of larval metamorphosis were recently isolated and identified forP. californica.In the present study, larval behaviour ofS. alveolataandP. californicawas compared in reciprocal laboratory settlement assays. For both species, metamorphosis occurred to a greater extent on conspecific tube sand t

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Rabby, Ahmad Fazley, Turabur Rahman, Zahidul Islam, et al. "Growth, Development and Survival Rate of The Blue Swimming Crab (Portunus pelagicus) Cultured using Different Larvae Feeds." ILMU KELAUTAN: Indonesian Journal of Marine Sciences 29, no. 1 (2024): 147–55. http://dx.doi.org/10.14710/ik.ijms.29.1.147-155.

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Blue swimming crab (Portunus pelagicus) is one of the most important commodities of softshell industry. Besides mud crab its demand as feed is increasing day by day. As a coastal dominant country, Bangladesh has a great feasibility of this species in culture, production, use and export. However, the production contribution from Bangladesh is still from natural sources and far behind in terms of farming, culture and production. Optimization of larval rearing techniques is therefore important to develop intensive hatchery rearing technique for this species. So, this study is aimed to develop lar

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Southerden, Francesca. "'Ad modum floris': Petrarch's Narcissus between the Rerum vulgarium fragmenta and Triumphi." Modern Language Review 119, no. 1 (2024): 89–113. http://dx.doi.org/10.1353/mlr.2024.a916729.

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ABSTRACT: This article analyses Petrarch's treatment of Narcissus in his vernacular poetry, focusing on his inclusion of an aspect of the myth not usually found in medieval vernacular rewritings of Ovid's Metamorphoses : the flower which seals Narcissus's metamorphosis. Setting Petrarch's flower-Narcissus in dialogue with passages from the anonymous fourteenth-century Ovide moralisé demonstrates the poet's distinctive treatment of the myth relative to his lyric and romance precursors even as he preserves its significance for dramatizing the ambivalent pleasures of erōs . Desiring 'in the manne

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Szurawitzki, Michael. "Becks Konzept der Metamorphose und Flecks Denkstil. Überlegungen zu ihrer Verschränkung." tekst i dyskurs - text und diskurs, no. 12 (2019) (December 27, 2019): 235–58. http://dx.doi.org/10.7311/tid.12.2019.13.

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In this paper, an interweaving of the concepts of metamorphosis, developed by Ulrich Beck, and the scientific thinking style of Ludwik Fleck is suggested. Due to our own relevant preliminary work, it seems obvious to bring these two concepts together for the purpose of a theoretical connection useful for linguistics, especially for discourse linguistics. After a short introduction (1) and a review of the state of research on Fleck’s theory of cognition (2), the core term “metamorphosis” is semantically determined (3), and comments are made on the relevance of the concept. This is followed by a

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Belles, Xavier. "The innovation of the final moult and the origin of insect metamorphosis." Philosophical Transactions of the Royal Society B: Biological Sciences 374, no. 1783 (2019): 20180415. http://dx.doi.org/10.1098/rstb.2018.0415.

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The three modes of insect postembryonic development are ametaboly, hemimetaboly and holometaboly, the latter being considered the only significant metamorphosis mode. However, the emergence of hemimetaboly, with the genuine innovation of the final moult, represents the origin of insect metamorphosis and a necessary step in the evolution of holometaboly. Hemimetaboly derives from ametaboly and might have appeared as a consequence of wing emergence in Pterygota, in the early Devonian. In extant insects, the final moult is mainly achieved through the degeneration of the prothoracic gland (PG), af

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Smith, Peter R., and Fu-Shiang Chia. "Larval development and metamorphosis of Sabellaria cementarium Moore, 1906 (Polychaeta: Sabellariidae)." Canadian Journal of Zoology 63, no. 5 (1985): 1037–49. http://dx.doi.org/10.1139/z85-156.

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The development of the polychaete Sabellaria cementarium Moore, 1906 proceeds at 10–14 °C, as follows: 23 h, early trochophore with prototroch and apical tuft; 65 h, 1 pair of provisional setae; 3.5 days, feeding trochophore; 18 days, metatrochophore; 4 weeks, metatrochophore with tentacle buds; 5–6 weeks, nectochaeta competent to metamorphose; 6–8 weeks, settlement and metamorphosis. Larval behavior is described. Tube sand of adult sabellariids (S. cementarium, Phragmatopoma lapidosa, ldanthrysus ornamentatus) and beach sand induced metamorphosis. Larvae exhibit a low degree of substrate spec

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Chazal, Anne C., John D. Krenz, and David E. Scott. "Relationship of larval density and heterozygosity to growth and survival of juvenile marbled salamanders (Ambystoma opacum)." Canadian Journal of Zoology 74, no. 6 (1996): 1122–29. http://dx.doi.org/10.1139/z96-124.

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Intraspecific competition and enzyme variability have been observed to influence the bioenergetics of many organisms. In amphibians, larval growth affects body size at metamorphosis, which in turn can lead to differences in adult survival and fecundity. We manipulated larval density in a population of the marbled salamander, Ambystoma opacum, and measured body size and enzyme variability in surviving newly metamorphosed juveniles. Crowded larval conditions resulted in lower survival and smaller body sizes at metamorphosis. Multilocus heterozygosity showed no relation to body size at high larva

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Jeffs, Andrew G., Stephen M. Chiswell, and John D. Booth. "Distribution and condition of pueruli of the spiny lobster Jasus edwardsii offshore from north-east New Zealand." Marine and Freshwater Research 52, no. 8 (2001): 1211. http://dx.doi.org/10.1071/mf01182.

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Pelagic spiny lobster, Jasus edwardsii, pueruli and phyllosomas were sampled on offshore transects from the south-east coast of the North Island of New Zealand in February 1998. Carapace length, weight, and total lipid content of pueruli (n = 360) were assessed; 33 pueruli had soft carapaces, indicative of recent metamorphosis from final-stage (stage 11) phyllosoma larvae. The recently metamorphosed pueruli occurred 24–216 km offshore, much farther offshore than has been previously suggested for the location of metamorphosis. Their distribution was compared to information on their size and con

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Thumm, Karen, and Michael Mahony. "The effect of water level reduction on larval duration in the red-crowned toadlet Pseudophryne australis (Anura: Myobatrachidae): Bet-hedging or predictive plasticity?" Amphibia-Reptilia 27, no. 1 (2006): 11–18. http://dx.doi.org/10.1163/156853806776052137.

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AbstractField observations indicate that when faced with the desiccation of their ephemeral ponds, the tadpoles of Pseudophryne australis, a semi-endotrophic myobatrachid frog, do not accelerate metamorphosis, and total reproductive losses are a frequent event. In this experiment we tested whether tadpoles were able to accelerate developmental rates when subjected to a decline in the water level. Tadpoles were divided into three treatments: water was held either at a constant level, or was removed at a slow or a fast rate. There were no significant differences in the mean length of larval dura

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Veres, Ottilia. "Spaces in Between in the Myth of Myrrha: A Metamorphosis into Tree." Acta Universitatis Sapientiae, Philologica 11, no. 1 (2019): 83–92. http://dx.doi.org/10.2478/ausp-2019-0006.

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Abstract Within the larger context of metamorphoses into plants in Greek and Roman mythology, the paper aims to analyse the myth of Myrrha and her metamorphosis into a tree, focusing on the triggering cause of the transformation as well as the response given to her newly-acquired form of life. Myrrha’s transformation into a myrrh tree takes place as a consequence of her transgressive incestuous act of love with her father, Cinyras. Her metamorphosis occurs as a consequence of sinful passion – passion in extremis –, and she sacrifices her body (and human life/existence) in her escape. I will lo

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Alves, Ricardo N., Ana S. Gomes, Kurt Stueber, et al. "The transcriptome of metamorphosing flatfish." BMC Genomics 17, no. 1 (2016): 413. https://doi.org/10.1186/s12864-016-2699-x.

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<strong>Background: </strong>Flatfish metamorphosis denotes the extraordinary transformation of a symmetric pelagic larva into an asymmetric benthic juvenile. Metamorphosis in vertebrates is driven by thyroid hormones (THs), but how they orchestrate the cellular, morphological and functional modifications associated with maturation to juvenile/adult states in flatfish is an enigma. Since THs act via thyroid receptors that are ligand activated transcription factors, we hypothesized that the maturation of tissues during metamorphosis should be preceded by significant modifications in the transcr

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