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Description of the ontogenic and larval period of discus fish (Symphysodon aequifasciatus)

Published online by Cambridge University Press:  03 April 2014

Douglas da Cruz Mattos*
Affiliation:
Universidade Estadual do Norte Fluminense Darcy Ribeiro, Departamento de Produção Animal, Laboratório de Zootecnia e Nutrição Animal, CEP, Campos dos Goytacazes, RJ, Brazil
Leonardo Demier Cardoso
Affiliation:
Universidade Estadual do Norte Fluminense Darcy Ribeiro, Departamento de Produção Animal, Laboratório de Zootecnia e Nutrição Animal, CEP, Campos dos Goytacazes, RJ, Brazil
Paulo José Fosse
Affiliation:
Universidade Estadual do Norte Fluminense Darcy Ribeiro, Departamento de Produção Animal, Laboratório de Zootecnia e Nutrição Animal, CEP, Campos dos Goytacazes, RJ, Brazil
Marcella Costa Radael
Affiliation:
Universidade Estadual do Norte Fluminense Darcy Ribeiro, Departamento de Produção Animal, Laboratório de Zootecnia e Nutrição Animal, CEP, Campos dos Goytacazes, RJ, Brazil
João Carlos Fosse Filho
Affiliation:
Universidade Estadual do Norte Fluminense Darcy Ribeiro, Departamento de Produção Animal, Laboratório de Zootecnia e Nutrição Animal, CEP, Campos dos Goytacazes, RJ, Brazil
João Vitor de Azevedo Manhães
Affiliation:
Universidade Estadual do Norte Fluminense Darcy Ribeiro, Departamento de Produção Animal, Laboratório de Zootecnia e Nutrição Animal, CEP, Campos dos Goytacazes, RJ, Brazil
Dalcio Ricardo de Andrade
Affiliation:
Universidade Estadual do Norte Fluminense Darcy Ribeiro, Departamento de Produção Animal, Laboratório de Zootecnia e Nutrição Animal, CEP, Campos dos Goytacazes, RJ, Brazil
Manuel Vazquez Vidal Jr
Affiliation:
Universidade Estadual do Norte Fluminense Darcy Ribeiro, Departamento de Produção Animal, Laboratório de Zootecnia e Nutrição Animal, CEP, Campos dos Goytacazes, RJ, Brazil
*
All correspondence to: Douglas da Cruz Mattos. Universidade Estadual do Norte Fluminense Darcy Ribeiro, Departamento de Produção Animal, Laboratório de Zootecnia e Nutrição Animal, CEP, Campos dos Goytacazes, RJ, Brazil. Tel: +55 22 997696350. e-mail: douglas_uenf@yahoo.com.br

Summary

The aim of this study was to describe the embryonic and larval development of discus fish (Symphysodon aequifasciatus), and to determine the time required, hours post fertilization (hpf), for the emergence of various structures. To describe embryonic and larval stages, observations were made at regular periods under an optical microscope and images were taken with a digital camera attached to a microscope. The average temperature reached in the experimental tank was 27.9°C. Important facts in embryonic and larval development are described, such as the closure of the blastopore, which occurred at 31.5 hpf; a period of eruption, which occurred at 58.5 hpf; and a mouth opening, which occurred at 90.5 hpf; and larvae that exhibited oriented swimming and eating exogenous food at 136.5 hpf.

Type
Research Article
Copyright
Copyright © Cambridge University Press 2014 

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