| Registro completo |
| Provedor de dados: |
R. Bras. Zootec.
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| País: |
Brazil
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| Título: |
Morphological and behavioral development of the piracanjuba larvae
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| Autores: |
Maciel,Cláudia Maria Reis Raposo
Lanna,Eduardo Arruda Teixeira
Maciel Junior,Alaor
Donzele,Juarez Lopes
Neves,Clóvis Andrade
Menin,Eliane
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| Data: |
2010-05-01
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| Ano: |
2010
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| Palavras-chave: |
Behavior
Brycon orbignyanus
Characiformes
First feeding
Morphology
Ontogeny
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| Resumo: |
The objective of this work was to study the morphologic development and the swimming and feeding behaviors of piracanjuba larvae, Brycon orbignyanus Valenciennes (1849) (Characiformes, Characidae, Bryconinae), during the period from zero to 172 hours after hatching (standard length = 3.62 - 11.94 mm). The morphological analyses were accomplished by using a trinocular stereo microscope, while the behavioral analyses were performed through periodic observations. In 28 hours after hatching, the larvae (standard length = 6.25 ± 0.13 mm) showed the following structural and behavioral characteristics that made them become active predators able to overcome a larval critical phase, the beginning of exogenous feeding: presence of pigmented eyes, terminal and wide mouth, developed oral dentition, developing digestive tube, yolk sac reduction, fins and swim bladder formation, horizontal swimming, cannibalism, and predation. Intense cannibalism among larvae was verified from 26 to 72 hours. At the end of the metamorphosis - 172 hours after hatching - the larvae measuring 11.94 + 0.80 mm in standard length presented a flexed notochord, caudal fin bifurcation, dorsal and anal fin formation, synchronized movements, and formation of shoals, characteristics that together allow enhanced perception and locomotio in exploration of the environment, determining the best moment for transfering to the fishponds. New studies can contribute to commercial fish farming by improving feeding management, performance, survival, and productivity of this species.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000500004
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| Editor: |
Sociedade Brasileira de Zootecnia
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| Relação: |
10.1590/S1516-35982010000500004
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| Formato: |
text/html
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| Fonte: |
Revista Brasileira de Zootecnia v.39 n.5 2010
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| Direitos: |
info:eu-repo/semantics/openAccess
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