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

Authors

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

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 Ãgua Doce
  • Alex Pires de Oliveira Nuñer, Universidade Federal de Santa Catarina
    Departamento de Aquicultura Biologia e Cultivo de Peixes de Ãgua Doce

Published

2010-05-24

Issue

Section

Aquiculture and Fisheries Resources

How to Cite

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. (2010). Acta Scientiarum. Biological Sciences, 32(2), 107-111. https://doi.org/10.4025/actascibiolsci.v32i2.5261

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