Temporal Dynamics of Reproduction in Hemiramphus brasiliensis Osteichthyes: HemiramphidaeReportar como inadecuado




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The Scientific World Journal - Volume 2014 2014, Article ID 837151, 8 pages -

Research ArticleDepartamento de Oceanografia e Limnologia, Centro de Biociências, Universidade Federal do Rio Grande do Norte, Via Costeira Senador Dinarte Medeiros Mariz, Mãe Luíza, s-n, 59.014-002 Natal, RN, Brazil

Received 20 July 2014; Revised 3 October 2014; Accepted 6 October 2014; Published 16 November 2014

Academic Editor: Veronique Martin-Jezequel

Copyright © 2014 Mônica Rocha de Oliveira and Sathyabama Chellappa. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The reproductive aspects of Hemiramphus brasiliensis were analyzed with a view to verify the temporal dynamics of reproduction. This paper presents data on sex ratio, length at first sexual maturity, macroscopic and histological aspects of gonad development, gonadosomatic index GSI, reproductive period, and fecundity of H. brasiliensis. The fishes were captured from the coastal waters of Rio Grande do Norte, northeastern Brazil. Females of this species predominated in the sampled population and were larger in size than the males. The length at the first sexual maturation of males was 20.8 cm and that of females was 21.5 cm. The macroscopic characteristics of the gonads indicated four maturation stages. Histological studies of gonads of H. brasiliensis showed six phases of oocyte development and four phases of spermatocyte development. The batch fecundity of this species was 1153 ±258.22 mature oocytes for 50 g body weight of female. The microscopic characteristics of gonad development indicate that H. brasiliensis is a multiple spawner, presenting a prolonged reproductive period during the whole year, with a peak in the month of April, and is considered as an opportunistic strategist.





Autor: Mônica Rocha de Oliveira and Sathyabama Chellappa

Fuente: https://www.hindawi.com/



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