Temperatures for fertilization and hatching and their influence on determining the sex ratio of the silver catfish Rhamdia quelen - doi: 10.4025/actascibiolsci.v32i2.5261

Ricardo da Silva Longo; Alex Pires de Oliveira Nuñer

doi:10.4025/actascibiolsci.v32i2.5261

Temperatures for fertilization and hatching and their influence on determining the sex ratio of the silver catfish Rhamdia quelen - doi: 10.4025/actascibiolsci.v32i2.5261

Ricardo da Silva Longo Universidade Federal de Santa Catarina
Alex Pires de Oliveira Nuñer Universidade Federal de Santa Catarina

DOI: https://doi.org/10.4025/actascibiolsci.v32i2.5261

Keywords: hatching time, survival

Abstract

This study aimed to evaluate the effects of water temperature during fertilization and egg incubation in the determination of the sex ratio of fingerlings of silver catfish Rhamdia quelen. Water temperatures of 19, 25 and 30°C were used during the egg fertilizations, and the eggs were then incubated at temperatures of 19, 25 or 30°C for each fertilization temperature condition. An increase in temperature reduced the fertilization rate of R. quelen, while the final number of fish was reduced when a lower temperature was used during egg incubation. The temperatures of fertilization and incubation that were tested did not alter the sex ratio.

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Author Biographies

Ricardo da Silva Longo, Universidade Federal de Santa Catarina

Departamento de Aquicultura Biologia e Cultivo de Peixes de Água Doce

Alex Pires de Oliveira Nuñer, Universidade Federal de Santa Catarina

Dlex Pires de Oliveira Nuñer formou-se em Agronomia pela Universidade Federal de Lavras (1985), e concluiu Mestrado em Ecologia e Recursos Naturais pela Universidade Federal de São Carlos (1991) e Doutorado em Ecologia e Recursos Naturais pela Universidade Federal de São Carlos (1997). Desde 1999 é professor da Universidade Federal de Santa Catarina, lotado no Departamento de Aqüicultura do Centro de Ciências Agrárias. Atua na área de Recursos Pesqueiros e Engenharia de Pesca, com estudos ligados ao Manejo e à Conservação de Peixes de Água Doce, ao desenvolvimento de Tecnologia de Cultivo de Peixes, à Limnologia e à Telemetria de Peixes. Currículo Lattes

Published

2010-05-24

How to Cite

Longo, R. da S., & Nuñer, A. P. de O. (2010). Temperatures for fertilization and hatching and their influence on determining the sex ratio of the silver catfish Rhamdia quelen - doi: 10.4025/actascibiolsci.v32i2.5261. Acta Scientiarum. Biological Sciences, 32(2), 107-111. https://doi.org/10.4025/actascibiolsci.v32i2.5261

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Issue

Vol 32 No 2 (2010)

Section

Aquiculture and Fisheries Resources

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