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| Registros recuperados: 18 | |
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| Hernandorena, A. |
| Heat shocks at 40 degree were delivered to Artemia at the end of embryonic development and at the beginning of postembryonic development and their effects on subsequent development examined. Heat shocks delivered during preemergence development have no effect on subsequent development. Heat shocks delivered to newly hatched nauplii induce anomalies on the morphogenesis of thoracic and genital appendages. The induction of morphological anomalies by thermal conditions prevailing during early larval life makes it easier to integrate the morphological effects previously induced by nutritional conditions imposed to older feeding stages. |
| Tipo: Text |
Palavras-chave: Artemia; Branchiopoda; Morphogenesis; Embryonic development. |
| Ano: 1987 |
URL: http://archimer.ifremer.fr/doc/1987/acte-1377.pdf |
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| Surot Navarro, E.A.. |
| El desarrollo embrionario y larval corresponden a fases importantes dentro del ciclo de vida de invertebrados marinos. Estudios relacionados al desarrollo embrionario de crustáceos son escasos y se enfocan principalmente en fecundidad, volumen y rendimiento reproductivo. La fisiología y bioquímica larval se ha estudiado con un poco más de detalle, aunque, el conocimiento de estas fases aún es escaso. El presente estudio analiza el desarrollo temprano de Lithodes santolla (Molina, 1782) y Petrolisthes laevigatus (Guérin, 1835) en términos de la fisiología y bioquímica durante el desarrollo, comparando ambas especies respecto al modo de desarrollo presente, planctotrofía (P. laevigatus) y lecitotrofía (L. santolla). Durante el desarrollo temprano se... |
| Tipo: Theses and Dissertations |
Palavras-chave: Marine invertebrates; Larval development; Embryonic development. |
| Ano: 2006 |
URL: http://hdl.handle.net/1834/4918 |
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| Costa,Deliane Cristina; Takata,Rodrigo; Silva,Walisson de Souza e; Bessonart,Martin; Gadea,Juan Luis; Magnone,Larisa; Luz,Ronald Kennedy. |
| ABSTRACT Samples of eggs, newly hatched larvae (NHL), and larvae at the end of the lecithotrophic period (eight days after hatching) (LPL) of Lophiosilurus alexandri were collected to determine the amino acid and fatty acid profiles. Crude protein did not change throughout initial development and the concentration of lipids was highest in NHL. The content of the indispensable amino acids (IAA) isoleucine, leucine, and valine decreased in LPL, while in eggs and NHL they remained high and similar in value. The dispensable amino acids (DAA), such as aspartic acid, tyrosine, and glycine, increased in LPL, while alanine decreased. The percentage of neutral lipids increased in LPL. The saturated fatty acid content decreased during ontogeny, while monounsaturated... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Embryonic development; Nutritional requirement; Pacamã. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000200215 |
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| Beiras, Ricardo; His, Edouard. |
| The effects of Hg concentrations ranging from 0 (control) to 1024 µg 1-1 upon embryogenesis, survival and growth of Mytilus galloprovincialis mussel larvae were investigated . Embryogenesis was abnormal in 50 % of the individuals at 10µg 1-1. The 48 h LC50 for D-shaped, early umbonate, late umbonate and eyed larvae were 51, 164, 322 and 383 µg 1- 1 respectively. The LC50 was an allometric function of ash-free dry weight with exponent b = 0.60. Larval growth was significantly reduced alter 6 d exposure to 4 µg Hg 1-1 and alter 10 d exposure to 2 µg 1-1. No significant differences in lethal or sublethal sensitivity to Hg were found between M. galloprovincialis and previously studied Crassostrea gigas embryos and larvae. The implications of these findings for... |
| Tipo: Text |
Palavras-chave: Mercury; Mytilus galloprovincialis; Mussel; Larvae; Growth; Embryonic development; Bioassay; Ecotoxicology. |
| Ano: 1995 |
URL: http://archimer.ifremer.fr/doc/00037/14868/12192.pdf |
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| SUZUKI, Yo; WATANABE, Hiroyuki; FUKUI, Yutaka; 福井, 豊. |
| The aim of this study was to investigate whether seasonal changes affected in vitro developmental competence of porcine oocytes. The relationship between atmospheric temperature and embryonic development of in vitro matured porcine oocytes following intracytoplasmic sperm injection was examined throughout the year. The blastocyst rate (31.1%) in winter (mean atmospheric temperature during December to February: -3.8 C) was significantly higher (P<0.05) than those of other seasons in 2008/2009 (19.7-23.5%; 6.3-17.5 C). The monthly mean blastocyst rates were negatively correlated with the temperatures (r=-0.5944, P<0.05). The results of the present study suggest that porcine embryos could be produced throughout the year, but the in vitro production... |
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Palavras-chave: Embryonic development; Pig; Seasonal changes; Temperature. |
| Ano: 2010 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2814 |
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| Amaral, Rodrigo de Souza; Faculdade de Agronomia e Medicina Veterinária, Universidade de Brasília - UnB; Siqueira Filho, Emivaldo de; Faculdade de Agronomia e Medicina Veterinária, Universidade de Brasília - UnB; Coser, Leonardo Augusto Silva; Faculdade de Agronomia e Medicina Veterinária, Universidade de Brasília - UnB; Euzebio, Umberto; Departamento de Genética e Morfologia, Instituto de Ciências Biológicas, Universidade de Brasília - UnB. |
| This study aimed to evaluate the effects of temperature variation during incubation on testicular morphology of post-hatch chicks. We utilized 60 eggs incubated under different temperatures: Group 1 – 37.5°C; Group 2 – 39.5°C; and Group 3 – 34°C. Chicks were weighted and the testes were histologically analyzed. All eggs from Group 3 showed embryonic death. There were no significant differences in body weight and testicular morphology between Groups 1 and 2; however, there was a difference in the diameter of the seminiferous tubules (p < 0.001). The increase in temperature to 39.5°C during incubation causes a decrease in diameter of the seminiferous tubules. |
| Tipo: Estudos morfológicos |
Palavras-chave: 2.06.02.00-6 Gallus gallus domesticus; Thermal stress; Embryonic development; Seminiferous tubules; Morphogenesis Embriologia Gallus gallus domesticus; Thermal stress; Embryonic development; Seminiferous tubules; Morphogenesis. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/8187 |
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| Buzollo,Hellen; Veríssimo-Silveira,Rosicleire; Oliveira-Almeida,Isângela R.; Alexandre,Juliana S.; Okuda,Hélio T.; Ninhaus-Silveira,Alexandre. |
| The fish embryonic development comprises the events between the egg fertilization up to larvae hatching, being useful for the identification of viable eggs in productivity and survival studies as well as in raising experiments of several species. The goal of the present study was to characterize the embryonic development of Pimelodus maculatus (Siluriformes; Pimelodidae). The embryogenesis was typical of teleosteans, but with differences in relation to other species such as duration of development, type of blastocoel, moment of somite segmentation among others. Six stages of embryonic development were defined: zygote, cleavage, blastula, gastrula, organogenesis (divided in phases: early segmentation and late segmentation) and hatching with a period of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Embryonic development; Induced spawning; Morphology; Yolk syncyctial layer. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000300013 |
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| Registros recuperados: 18 | |
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