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Effect of temperature on the embryonic and larvae development of discus fish Symphysodon aequifasciatus and time of first feeding

Published online by Cambridge University Press:  18 September 2024

Douglas da Cruz Mattos
Affiliation:
Federal Institute of Education, Science and Technology Espírito Santo, Piúma, Brazil
Leonardo Demier Cardoso
Affiliation:
Federal University of Juiz de Fora, Minas Gerais, Brazil
Adriano Teixeira de Oliveira*
Affiliation:
Federal Institute of Education, Science and Technology Amazonas, Manaus, Brazil
Rafaela Screnci-Ribeiro
Affiliation:
North Fluminense State University Darcy Ribeiro, Animal Science and Nutrition Laboratory, Rio de Janeiro, Brazil
Bruno Olivetti de Mattos
Affiliation:
Federal University of Recôncavo da Bahia, Center for Agricultural, Environmental and Biological Sciences, Cruz das Almas, Brazil
Paulo Henrique Rocha Aride
Affiliation:
Federal Institute of Education, Science and Technology Amazonas, Manaus, Brazil
Marcella Costa Radael
Affiliation:
Federal University of Western Pará, Monte Alegre, Brazil
Jonas Henrique de Souza Motta
Affiliation:
Federal Institute of Education, Science and Technology Espírito Santo, Piúma, Brazil
Manuel Vazquez Vidal
Affiliation:
North Fluminense State University Darcy Ribeiro, Animal Science and Nutrition Laboratory, Rio de Janeiro, Brazil
*
Corresponding author: Adriano Teixeira de Oliveira; Email: adriano.oliveira@ifam.edu.br

Summary

This study aimed to analyze the influence of different temperatures on the embryonic and larval development of discus fish Symphysodon aequifasciatus and determine the time required for the beginning of exogenous feeding. Eggs and larvae were obtained from natural spawns and distributed in five treatments: 24.0, 26.0, 28.0, 30.0, and 32.0 °C. To assess the developmental stages and embryonic structures, samples were taken at regular intervals and checked under an optical microscope. At the end of the experimental period, statistical analysis was performed, followed by Tukey’s test. As a result, it was possible to observe the significant effects of temperature on the variables. It was noted that the temperature accelerated the embryonic and larval development of the discus and also contributed to a reduction in the time between the incubation period and the feeding transition. It was also noted that the incubation of eggs and larvae at a temperature of 24.0 °C can cause damage to embryos, such as malformation of the body as well as anomalies in the circulatory system.

Information

Type
Research Article
Copyright
© The Author(s), 2024. Published by Cambridge University Press

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