Induced spawning of brazilian mojarra Eugerres brasilianus in captivity

Authors

  • Gabriel PASSINI Universidade Federal de Santa Catarina, Departamento de Aquicultura, Centro de Ciências Agrárias, Laboratório de Piscicultura Marinha
  • Cristina Vaz Avelar de CARVALHO Universidade Federal de Santa Catarina, Departamento de Aquicultura, Centro de Ciências Agrárias, Laboratório de Piscicultura Marinha
  • Wanessa de Melo COSTA Fundação Instituto de Pesca do Estado do Rio de Janeiro - FIPERJ
  • Vinicius Ronzani CERQUEIRA Universidade Federal de Santa Catarina, Departamento de Aquicultura, Centro de Ciências Agrárias, Laboratório de Piscicultura Marinha

Keywords:

Gerreidae, reproduction, maturation, LHRHa

Abstract

The objective of this study was to evaluate different dosages from one analogue of luteinizing hormone-releasing hormone (LHRHa) for induced spawning of Eugerres brasilianus broodstock in captivity. Wild fishes with an average weight of 302.0 ± 45.0 g were kept in cages in estuarine water. There were tested two dosages, 15 µg kg-1 and 30 µg kg-1, and a control group that did not receive hormonal treatment. After induction, fishes were transferred to 500 L tanks in a proportion of two males for each female. Only hormonally induced fish spawned naturally in the tanks after 36 hours, at 26 ± 0.2°C. Fertilization and hatching rates varied from 97 to 100% and 92 to 99% in treatments 15 µg kg-1 and 30 µg kg-1 respectively. The dosage of 15 µg kg-1 of the hormone LHRHa is enough to obtain final maturation and spawning in E. brasilianus broodstock.

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Published

2018-11-13

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