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| Registros recuperados: 170 | |
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| Da Costa Gonzalez, Fiz; Robert, Rene; Quere, Claudie; Wikfors, Gary H.; Soudant, Philippe. |
| Essential fatty acids (EFA) are important for bivalve larval survival and growth. The purpose of this study was to quantitatively assess for the first time through a mass-balance approach dietary EFA incorporation and synthesis within Crassostrea gigas larvae. A first experiment was carried out using two microalgae, Tisochrysis lutea (T) and Chaetoceros neogracile (Cg), as mono- and bi-specific diets. A second experiment using a similar design was performed to confirm and extend the results obtained in the first. Flow-through larval rearing was used for accurate control of food supply and measurement of ingestion. Non-methylene-interrupted fatty acids were synthetized from precursors supplied in the diet: 16:1n-7 and 18:1n-9, mediated by Delta 5... |
| Tipo: Text |
Palavras-chave: Fatty acid; Larvae; Lipids; Metabolism; Oyster; Synthesis. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00268/37962/36086.pdf |
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| Almanza Valenzuela, Enrique Iván. |
| El gusano rojo de maguey es un recurso atractivo para los colectores y acopiadores que lo comercian en mercados y restaurantes a precios elevados, explotando las poblaciones silvestres sin un programa de manejo, esto ha causado reducción tanto de la planta de maguey como del insecto, por lo que es indispensable generar conocimientos que permitan realizar un mejor aprovechamiento de este recurso. En este trabajo se obtuvieron larvas de primer instar al incubar huevos en condiciones de laboratorio y se definieron aspectos básicos de biología y comportamiento de Comadia redtenbacheri, para lograr el establecimiento y desarrollo de su fase larvaria en plantas de maguey mantenidas en condiciones de invernadero. Los mejores niveles de infestación se... |
| Tipo: Tesis |
Palavras-chave: Gusano rojo de maguey; Agave salmiana; Insectos comestibles; Larvas; Maestría; Entomología y Acarología; Agave red worm; Edible insects; Larvae. |
| Ano: 2007 |
URL: http://hdl.handle.net/10521/1277 |
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| Charlon, Nicole. |
| The problem of the clogging up of sea water pipes by Mytilus edulis larvae is a very real problem. A study has been made of the ways to destroy these larvae, (1) by electricity (publication in preparation), (2) by ultrasound. This last technique has given interesting data, but exploitation of results on a large scale presents many difficulties. An interesting general phenomenon is to be underlined. For ultrasound treatments of short duration (10s), many larvae are simply stressed and recover later on. For longer treatments, there is actual dislocation of the larvae and instant mortality, this mortality increases with time. |
| Tipo: Text |
Palavras-chave: Mytilus edulis; Pest control; Pipelines; Mortality causes; Larvae. |
| Ano: 1975 |
URL: http://archimer.ifremer.fr/doc/1975/publication-2031.pdf |
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| Mazurais, David; Ernande, Bruno; Quazuguel, Patrick; Severe, Armelle; Huelvan, Christine; Madec, Lauriane; Mouchel, Olivier; Soudant, P.; Robbens, J.; Huvet, Arnaud; Zambonino-infante, J.. |
| Microplastics are present in marine habitats worldwide and may be ingested by low trophic organisms such as fish larvae, with uncertain physiological consequences. The present study aims at assessing the impact of polyethylene (PE 10-45µM) microbeads ingestion in European sea bass (Dicentrarchus labrax) larvae. Fish were fed an inert diet including 0, 104 and 105 fluorescent microbeads per gram from 7 until 43 days post-hatching (dph). Microbeads were detected in the gastrointestinal tract in all fish fed diet incorporating PE. Our data revealed an efficient elimination of PE beads from the gut since no fluorescent was observed in the larvae after 48h depuration. While the mortality rate increased significantly with the amount of microbeads scored per... |
| Tipo: Text |
Palavras-chave: Microplastic; Fish; Larvae; Ingestion; Survival. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00279/39057/37621.pdf |
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| Sluys, Ronald. |
| Many of the lower metazoans reach adulthood via complex developmental stages. Each of these stages is described with a specialized terminology, which is different for every major group of organisms. Biologists with a proper training in biodiversity may have learned about these complex issues during their undergraduate days, but many of us do no longer encounter the intricacies of lower metazoan development in later stages of our careers. We may be familiar with the ontogenetic stages in the group on which we specialize, but only a few will have practical knowledge and an overview of the larval stages in such groups as crustaceans, echinoderms, polychaetes, sipunculans, molluscs, flatworms, bryozans, and nemertines. Donald Williamson certainly belongs to... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Ontogeny; Larvae; Evolutionary theory; Parallelism; Homology. |
| Ano: 1992 |
URL: http://www.repository.naturalis.nl/record/504508 |
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| Genard, Bertrand; Moraga, Dario; Pernet, Fabrice; David, Elise; Boudry, Pierre; Tremblay, Rejean. |
| Quantification of mRNA of genes related to metabolism, immunity and cellular stress was examined in relation to a massive mortality event during the culture of American oyster larvae, Crassostrea virginica which was probably, in regard to previous microbiological analysis, induced by vibrio infection. To document molecular changes associated with the mortality event, mRNA levels were compared to biochemical and physiological data, previously described in a companion paper. Among the 18 genes studied, comparatively to the antibiotic control, 10 showed a lower relative gene expression when the massive mortality occurred. Six of them are presumed to be related to metabolism, corroborating the metabolic depression associated with the mortality event suggested... |
| Tipo: Text |
Palavras-chave: Massive mortality; Relative gene expression; Metabolism; Immunity; Cellular stress; Larvae. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00075/18585/16138.pdf |
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| Pittman, Karin; Yufera, Manuel; Pavlidis, Michail; Geffen, Audrey J.; Koven, Willian; Ribeiro, Laura; Zambonino, Jose Luiz; Tandler, Amos. |
| Teleost fish are more diverse than any other vertebrate group, and yet only a limited number of species are fished and farmed globally. Efforts to expand the quantity and diversity of fish produced are hampered by the extreme diversity of ontogenetic responses of fish, especially during larval development. This review looks at advances in molecular phylogeny, endocrine and nutrient influences and long-term studies of the phenotypes of commercially important fish to put the sources and consequences of this plasticity into context. This nested context of evolutionary forces of the fish-specific genome duplication, epigenetic influences, ontogenetically conserved processes like metamorphosis and cell determination is further presented in relation to how fish... |
| Tipo: Text |
Palavras-chave: Development; Epigenetics; Fish-specific genome duplication; Juveniles; Larvae; Metamorphosis; Plasticity. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00144/25509/23655.pdf |
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| Sankarankutty,C; Oliveira,J.E. Lins; Cunha,K.M.F; Silva,A.C.C; Barroca,E.V.G. |
| The present paper deals with data on zooplankton collected from the estuary of Potengi, Natal, Rio Grande do Norte, Brazil covering a period of one year from October 1992 to October 1993. Three fixed stations within the estuary located at varying distances from the mouth of the river were sampled. Sampling was done monthly when the tide was lowest. Analysis of the samples has shown clear pattern of seasonal variations in abundance of the dominant zooplankton components which are composed of Copepoda, Appendicularia, larvae of Brachyura, larvae of Cirripedia and Chaetognalha. A detailed study of the larvae of Brachyura was also attempted which showed that seven species can be identified in the samples, of which those of Aratus pisonii (H. Milne Edwards) and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brachyura; Seasonal; Abundance; Taxonomy; Larvae; Estuary; Brazil. |
| Ano: 1995 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751995000200007 |
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| Marengoni,Nilton Garcia; Pereira,Letícia Angélica; Weiss,Luciane Aline; Besen,Mateus Antonio; Bombardelli,Robie Allan. |
| ABSTRACT: The objective of this study was to evaluate the effects of garlic (Allium sativum) essential oil on the rates of eggs fertilization and hatching and on the normal development of larvae of artificially incubated silver catfish (Rhamdia quelen). The experiment was carried out using a completely randomized experimental design with four treatments and five replicates. The treatments consisted of introducing garlic essential oil into the incubators, which used a closed system of water recirculation, at concentrations of 0, 1, 3, and 5mg L-1. Rates of eggs fertilization and larval hatching were determined at 10 and 24h after the beginning of eggs hydration. Morphology of larvae was assessed with the aid of a stereo microscope to determine the rate of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Silver catfish; Antimicrobials; Hatching rate; Larvae; Allium sativum. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000600652 |
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| Registros recuperados: 170 | |
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