Academic literature on the topic 'Trochophore'

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Journal articles on the topic "Trochophore"

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Li, Haimei, Bo Zhang, Guiju Huang, et al. "Differential Gene Expression during Larval Metamorphic Development in the Pearl Oyster, Pinctada fucata, Based on Transcriptome Analysis." International Journal of Genomics 2016 (2016): 1–15. http://dx.doi.org/10.1155/2016/2895303.

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P. fucata experiences a series of transformations in appearance, from swimming larvae to sessile juveniles, during which significant changes in gene expression likely occur. Thus, P. fucata could be an ideal model in which to study the molecular mechanisms of larval metamorphosis during development in invertebrates. To study the molecular driving force behind metamorphic development in larvae of P. fucata, transcriptomes of five larval stages (trochophore, D-shape, umbonal, eyespots, and spats) were sequenced using an Illumina HiSeq™ 2000 system and assembled and characterized with the transcr
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Lacalli, Thurston C. "Structural correlates of photoresponse in trochophore larvae." Canadian Journal of Zoology 66, no. 4 (1988): 1004–6. http://dx.doi.org/10.1139/z88-148.

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Electron microscopic reconstructions of larval ocelli from two polychaete species show a correlation between pigment cup orientation and larval photoresponse. Phyllodoce maculata larvae are strongly photopositive and their ocellar receptor cell is shaded from above. Spirobranchus polycerus larvae are photonegative and their receptor cell is shaded from below. The results support a hypothesis developed by Marsden and Hsieh (Marsden, J. R., and Hsieh, J. 1987. Zoomorphology (Berlin), 106: 361–368), which states that larvae undertake extended swimming only when the eyespot, i.e., the receptor cel
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Bartolomaeus, Thomas. "Head Kidneys in Hatchlings of Scoloplos Armiger (Annelida: Orbiniida): Implications for the Occurrence of Protonephridia in Lecithotrophic Larvae." Journal of the Marine Biological Association of the United Kingdom 78, no. 1 (1998): 183–92. http://dx.doi.org/10.1017/s0025315400040017.

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It is generally believed that lecithotrophic larvae of annelids do not possess functional excretory organs. However, as in certain annelids the planktotrophic trochophora larva has been secondarily modified into a lecithotrophic developmental stage and because protonephridia are characteristic for the trochophora, lecithotrophic developmental stages should also possess such organs. To test this assumption hatchlings of the orbiniidan Scoloplos armiger, which develops directly without a free-living larval stage, were investigated ultrastrucrurally. Each hatchling possesses a pair of protonephri
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Serras, F., and J. E. Speksnijder. "F-actin localization during trochoblast differentiation embryos." Development 112, no. 3 (1991): 833–45. http://dx.doi.org/10.1242/dev.112.3.833.

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We have studied the development of the ciliated, Patella vulgata trochophore larvae. This organ, the different clones of trochoblasts. In each of these filamentous (F-) actin is formed at the time that which we visualized with TRITC-phalloidin, is cilia that crosses each trochoblast. Isolated quartets of animal micromeres (from which the form rows of cilia and F-actin bands at the proper embryos, the trochoblasts shift their position form a ring of differentiated prototroch cells with a encircling the entire larva. At the dorsal side, a and thus a double band of F-actin is present. In double F
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Liu, Yibing, Lisui Bao, Sarah R. Catalano, Xiaochen Zhu, and Xiaoxu Li. "The Effects of Larval Cryopreservation on the Epigenetics of the Pacific Oyster Crassostrea gigas." International Journal of Molecular Sciences 24, no. 24 (2023): 17262. http://dx.doi.org/10.3390/ijms242417262.

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High mortalities and highly variable results during the subsequent development of post-thaw larvae have been widely considered as key issues restricting the application of cryopreservation techniques to support genetic improvement programs and hatchery production in farmed marine bivalve species. To date, few studies have been undertaken to investigate the effects of cryodamage at the molecular level in bivalves. This study is the first to evaluate the effect of larval cryopreservation on the epigenetics of the resultant progenies of the Pacific oyster Crassostrea gigas. The results show that
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Chooseangjaew, Supatcha, Nuntaporn Getlekha, Worawut Koedprang, Chanika Saenge Chooklin, Kattinat Sakulsawasdipan, and Suwat Tanyaros. "Induction of Gynogenetic Diploids the Tropical Oyster, Crassostrea belcheri 1873 (Ostreids: Ostreoidea)." ASEAN Journal of Scientific and Technological Reports 27, no. 2 (2024): 72–78. http://dx.doi.org/10.55164/ajstr.v27i2.250804.

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The induction of diploid gynogenesis in the Tropical oyster, Crassostrea belcheri 1873, was carried out through two main experiments: 1) the destruction of spermatozoa DNA using ultraviolet (UV) irradiation, and 2) the induction of gynogenetic diploids. UV light source was placed 30 cm over the sperm for various durations, including 0 (control), 30, 60, 90, and 120 seconds. The study revealed that the highest survival rate was observed in trochophore at 90 minutes (42.5 ± 2.50%) compared to the normal control C. belcheri (p>0.05). Based on cytogenetic study, haploid (n=10), diploid (2n=20),
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Paredes, E., S. L. Adams, S. L. Gale, L. T. McGowan, J. F. Smith, and H. R. Tervit. "41. Cryopreservation of greenlipped mussel (Perna canaliculus) trochophore larvae." Cryobiology 63, no. 3 (2011): 317. http://dx.doi.org/10.1016/j.cryobiol.2011.09.044.

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Paredes, E., S. L. Adams, S. L. Gale, L. T. McGowan, J. F. Smith, and H. R. Tervit. "118. Cryopreservation of Pacific oyster (Crassostrea gigas) trochophore larvae." Cryobiology 63, no. 3 (2011): 338. http://dx.doi.org/10.1016/j.cryobiol.2011.09.121.

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Paredes, E., S. L. Adams, H. R. Tervit, et al. "Cryopreservation of Greenshell™ mussel (Perna canaliculus) trochophore larvae." Cryobiology 65, no. 3 (2012): 256–62. http://dx.doi.org/10.1016/j.cryobiol.2012.07.078.

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Marsden, J. R. "Response to light by trochophore larvae of Spirobranchus giganteus." Marine Biology 93, no. 1 (1986): 13–16. http://dx.doi.org/10.1007/bf00428649.

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Dissertations / Theses on the topic "Trochophore"

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Hunt, Marie. "Development of Lecithotrophic Trochophore-like pilidium nielseni Found in Five Lineiform Species (Lineidae; Heteronemertea; Pilidiophora; Nemertea) from Oregon." Thesis, University of Oregon, 2016. http://hdl.handle.net/1794/20557.

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The pilidium larva is an idiosyncrasy defining the Pilidiophora. Its development is unique, and conserved even in derived pilidia; the juvenile is formed via a series of invaginations of the larval epidermis (imaginal discs), then bursts through the larval body while simultaneously consuming it in catastrophic metamorphosis. Pilidium nielseni is a lecithotrophic pilidium with two circumferential ciliary bands reminiscent of the “prototroch” and “telotroch” of a trochophore larva, the ancestral larval form of spiralians. However, pilidium nielseni represents a convergence on this larval form, n
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Hunt, Marie Katherine. "Development of Lecithotrophic Trochophore-like pilidium nielseni Found in Five Lineiform Species (Lineidae; Heteronemertea; Pilidiophora; Nemertea) from Oregon." Thesis, University of Oregon, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10142323.

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<p>The pilidium larva is an idiosyncrasy defining the Pilidiophora. Its development is unique, and conserved even in derived pilidia; the juvenile is formed via a series of invaginations of the larval epidermis (imaginal discs), then bursts through the larval body while simultaneously consuming it in catastrophic metamorphosis. Pilidium nielseni is a lecithotrophic pilidium with two circumferential ciliary bands reminiscent of the ?prototroch? and ?telotroch? of a trochophore larva, the ancestral larval form of spiralians. However, pilidium nielseni represents a convergence on this larval form
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Books on the topic "Trochophore"

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Nielsen, Claus, ed. Origin and Diversity of Marine Larvae. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198786962.003.0001.

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The origin of larvae has been much discussed, but the most plausible theory is the “terminal addition theory,” which proposes that the larvae originated when a benthic stage was added to the ancestral holoplanktonic life cycle, with the planktonic stage retained as the larva. Marine larvae show an astonishing morphological and ecological variation. Planktotrophic larvae are found in many smaller or larger lineages, and characteristic types—such as the trochophore of many annelids and molluscs, the cyphonautes of some bryozoans, the actinotrocha of most phoronids, the pluteus larvae of most ech
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Book chapters on the topic "Trochophore"

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Williamson, Donald I. "Trochophorate Animals: Polychaetes, Echiurans, Sipunculans, Molluscs." In The Origins of Larvae. Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-017-0357-4_6.

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Williamson, Donald I. "Trochophorate Animals: Polychaetes, Echiurans, Sipunculans, Molluscs." In LARVAE and EVOLUTION. Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-015-8077-9_10.

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Williamson, Donald I. "Near-Trochophorate Animals: Flatworms, Nemertines, Bryozoans." In LARVAE and EVOLUTION. Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-015-8077-9_11.

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Williamson, Donald I. "Near-Trochophorate Animals: Flatworms, Nemerteans, Bryozoans, Lophophorates." In The Origins of Larvae. Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-017-0357-4_7.

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"Trochophora." In Encyclopedia of Parasitology. Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-43978-4_3288.

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Emília Cunha, Maria, Hugo Quental Ferreira, Ana Barradas, and Pedro Pousão-Ferreira. "Response of Marine Plankton Communities in Ponds to the Presence of Vertical Structures." In Plankton Communities [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.97475.

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The effects of bottom vertical structures like AquaMats® in enhancing plankton productivity was evaluated. One experimental earthen pond of 500 m2 was provided with AquaMats® increasing the surface substrate area 12 times and water quality, phytoplankton and zooplankton populations developed during almost 100 days was compared with a pond without AquaMats®. Their presence favored the development of Dinoflagellates (Miozoa, Dinophyceae), mostly Gymnodiniales, which may be of some concern since some species of this group have been associated with toxic algal blooms while in the ponds without Aqu
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Kültz, Dietmar. "Mollusc aquaculture." In A Primer of Ecological Aquaculture. Oxford University PressOxford, 2022. http://dx.doi.org/10.1093/oso/9780198850229.003.0010.

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Abstract Mollusc aquaculture accounts for 22% of animal aquaculture and 60% of animal mariculture. Most aquaculture molluscs are bivalves, although some are gastropods, notably abalone. Bivalves develop via the trochophore, veliger, and pediveliger larval stages. After attachment, the pediveliger metamorphoses into spat. Mollusc aquaculture is divided into two major phases: 1) spat collection and juvenile development and 2) grow-out. Often the first phase is performed in intensive hatcheries while grow-out is by extensive mariculture. Extensive grow-out methods are on-bottom culture, off-botto
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