Temporal Dynamics of Reproduction in Hemiramphus brasiliensis (Osteichthyes: Hemiramphidae)

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 p...

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Published inTheScientificWorld Vol. 2014; no. 2014; pp. 1 - 8
Main Authors Oliveira, Mônica Rocha de, Chellappa, Sathyabama
Format Journal Article
LanguageEnglish
Published Cairo, Egypt Hindawi Publishing Corporation 2014
Hindawi Limited
Wiley
Subjects
Animal behavior
Animals
Beloniformes
Brazil
Commercial fishing
Female
Fertility - physiology
Fish
Fishes - anatomy & histology
Fishes - physiology
Fishing
Gonads - cytology
Hemiramphidae
Hemiramphus brasiliensis
Male
Marine
Osteichthyes
Physiological aspects
Reproduction - physiology
Sex Ratio
Sexual Maturation - physiology
Spermatocytes - cytology
Time Factors
Brazil
Rio Grande
ASW, Brazil, Rio Grande do Norte
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Summary: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.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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Academic Editor: Veronique Martin-Jezequel
ISSN:2356-6140
1537-744X
1537-744X
DOI:10.1155/2014/837151