Your browser doesn't support javascript.
loading
Embryonic and larval development of Brycon amazonicus (SPIX & AGASSIZ, 1829).
Nakauth, A C S Sampaio; Villacorta-Correa, M A; Figueiredo, M R; Bernardino, G; França, J M.
Afiliação
  • Nakauth AC; Instituto Natureza e Cultura, Universidade Federal do Amazonas, Benjamin Constant, AM, Brazil.
  • Villacorta-Correa MA; Faculdade de Ciências Agrárias, Universidade Federal do Amazonas, Manaus, AM, Brazil.
  • Figueiredo MR; Programa de Pós-graduação em Aqüicultura, Universidade Federal do Rio Grande, Rio Grande, RS, Brazil.
  • Bernardino G; Centro de Tecnologia, Treinamento e Produção em Aqüicultura, Secretaria Executiva Adjunta de Pesca e Aqüicultura, Manaus, AM, Brazil.
  • França JM; Centro de Tecnologia, Treinamento e Produção em Aqüicultura, Secretaria Executiva Adjunta de Pesca e Aqüicultura, Manaus, AM, Brazil.
Braz J Biol ; 76(1): 109-16, 2016 Feb.
Article em En | MEDLINE | ID: mdl-26909629
The objective of this study was to describe the embryonic and larval development of Brycon amazonicus, featuring the main events up to 50 hours after fertilization (AF). The material was provided by the Aquaculture Training, Technology and Production Center, Presidente Figueiredo (AM). The characterization was based on stereomicroscopic examination of the morphology of eggs, embryos and larvae and comparison with the literature. Matrinxã eggs are free, transparent, and spherical, with a perivitelline space of 0.56 ± 0.3 mm. The successive divisions give rise to cells with 64 blastomeres during the first hour AF. The gastrula stage, beginning 02 h 40 min AF, was characterized by progressive regression cells and the formation of the embryonic axis, leading to differentiation of the head and tail 05 h 30 min AF. From 06 to 09 h AF the somites, notochord, otic and optic vesicles and otoliths were observed, in addition to heart rate and the release of the tail. The larvae hatched at 10 h 30 min AF (29.9 °C), with a total length of 3.56 ± 0.46 mm. Between 19 and 30 h AF, we observed 1) pigmentation and gut formation, 2) branchial arches, 3) pectoral fins, 4) a mouth opening and 5) teeth. Cannibalism was initiated earlier (34 h AF) which was associated with rapid yolk absorption (more than 90% until 50 h AF), signaling the need for an exogenous nutritional source. The environmental conditions (especially temperature) influenced the time course of some events throughout the embryonic and larval development, suggesting the need for further studies on this subject.
Assuntos
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Desenvolvimento Embrionário / Embrião não Mamífero / Characidae Limite: Animals Idioma: En Revista: Braz J Biol Assunto da revista: BIOLOGIA Ano de publicação: 2016 Tipo de documento: Article País de afiliação: Brasil País de publicação: Brasil
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Desenvolvimento Embrionário / Embrião não Mamífero / Characidae Limite: Animals Idioma: En Revista: Braz J Biol Assunto da revista: BIOLOGIA Ano de publicação: 2016 Tipo de documento: Article País de afiliação: Brasil País de publicação: Brasil