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Desenvolvimento embrionário e larval de Brycon gouldingi (Teleostei, Characidae)

Authors: Faustino, Francine;

Desenvolvimento embrionário e larval de Brycon gouldingi (Teleostei, Characidae)

Abstract

Brycon gouldingi is an endemic species of Tocantins-Araguaia basin and studies about its biology and ontogenetic development are not available in the literature. Morphometric and morphological analyses of embryonic and larval stages of this species will increase the knowledge about its biology and aquaculture potential. To perform this work, adult specimens from Mortes River- MT, the main tributary of Araguaia River were collected and adapted to captivity for seven months. Ten collections were carried out at Buriti Fishculture, Nova Mutum — MT, between December 2007 and January 2008, after induced spawning, comprising samplings in the following periods: extrusion, fertilization (time zero), 10, 20 and 30 seconds, lmin, lmin e 30s, at each minute up to 10min, each 5min up to 30min, at 45min, each hour up to 24 hours, each 2 hours up to 48 hours and each 3 hours up to total yolk absorption. Oocytes, eggs, embryos and larvae were observed under stereomicroscope, scanning electron microscope and light microscope. Morphometry analyses were also performed in the oocytes released by each female and in the oocytes up to total yolk absorption taking into account total larval length, yolk sac height and length values. The mean water temperature in the incubators was 26.4±1.12 °C. The oocyte diameter was equal to 1.13±0.06 mm and 54% of them were between 1.11 and 1.20 mm. The mean duration of the embryonic period was 13.9±0.06 hours post-fertilization (hpf) being divided into seven stages (zygote, cleavage, blastula, gastrula, histogenesis/organogenesis and hatching). At hatching, the total larval length was equal to 3.40±0.07 mm and the yolk sac volume was 0.46±0.081.iL. During the larval development, the appearance of adhesive organs on the cephalic dorsal region plus heart... (Complete abstract click electronic access below)

Brycon gouldingi é uma espécie endêmica da Bacia Tocantins-Araguaia e estudos acerca de sua biologia e desenvolvimento ontogenético não se encontram na literatura. Analises morfométrica e morfológica dos períodos embrionário e larval desta espécie contribuirão para o conhecimento de sua biologia e potencial para o cultivo. Para este trabalho, foram capturados exemplares adultos da espécie, provenientes do Rio das Mortes - MT, principal afluente do Rio Araguaia e adaptados em cultivo por cerca de sete meses. Dez coletas foram realizadas na Piscicultura Buriti, Nova Mutum — MT, nos meses de dezembro de 2007 e janeiro de 2008, apos a reprodução induzida dos exemplares, sendo feitas amostragens nos seguintes tempos: extrusão, fertilização (tempo zero), 10, 20 e 30 segundos, 1 min, 1 min e 30s, a cada minuto ate completar 10min, a cada 5min ate atingir 30min, aos 45min, de hora em hora ate completar 24 horas, a cada 2 horas ate completar 48 horas e a cada 3 horas ate a absorção total do vitelo. Ovócitos, ovos, embriões e larvas foram observados em estereomicroscópio, microscopia eletrônica de varredura e microscopia de luz. Foi realizada também a morfometria dos ovócitos liberados por cada fêmea e das larvas desde o momento da eclosão ate a absorção total do vitelo, registrando-se valores de comprimento total da larva, altura e comprimento do saco vitelínico. A temperatura media da água nas incubadoras foi de 26,4±1,12 °C. 0 diâmetro dos ovócitos foi de 1,13±0,06 mm e 54% deles possuíam entre 1,11 e 1,20 mm. 0 período embrionário teve uma duração media de 13,9±0,06 horas pós-fertilização (hpf) sendo dividido em sete fases (zigoto,'1. clivagem, mórula, blástula, gástrula, histogênese/organogênese...

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Universidade Estadual Paulista (UNESP)

Pós-graduação em Aquicultura - FCAV

Country
Brazil
Keywords

Ovócitos, Brycon gouldingi - Morphology, Brycon - Morfologia

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
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