The reproductive biology of the rainbow runner, Elagatis bipinnulata (Quoy & Gaimard, 1825) caught in the São Pedro and São Paulo Archipelago
The rainbow runner, Elagatis bipinnulata, which belongs to the Carangidae family, has a circumtropical distribution. It is found throughout the Atlantic Ocean, from Massachusetts (USA) to Bahia (Brazil). The reproductive biology of the rainbow runner was studied, using specimens captured off the São...
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doaj-b73c53f6c1884ad08e5bc3c654c88b402020-11-24T22:11:46ZengInstituto Internacional de EcologiaBrazilian Journal of Biology1678-43757119910610.1590/S1519-69842011000100015S1519-69842011000100015The reproductive biology of the rainbow runner, Elagatis bipinnulata (Quoy & Gaimard, 1825) caught in the São Pedro and São Paulo ArchipelagoPB Pinheiro0FHV Hazin1P Travassos2PGV Oliveira3F Carvalho4MG Rêgo5Universidade Federal de PernambucoUniversidade Federal Rural de PernambucoUniversidade Federal Rural de PernambucoUniversidade Federal Rural de PernambucoUniversity of FloridaUniversidade Federal Rural de PernambucoThe rainbow runner, Elagatis bipinnulata, which belongs to the Carangidae family, has a circumtropical distribution. It is found throughout the Atlantic Ocean, from Massachusetts (USA) to Bahia (Brazil). The reproductive biology of the rainbow runner was studied, using specimens captured off the São Pedro and São Paulo Archipelago. From July 1999 to November 2003, a total of 352 fishes were analysed (201 females and 151 males). Fork length (FL) was measured and specimens were gutted for gonads collection. In the laboratory, gonads length, width and weight were measured, and sexes identified macroscopically. Through histological analysis, five different maturation stages were identified for females: immature, maturing, mature, spent and resting. A predominance of maturing and mature females was observed from January to May. The highest gonad index (GI) values were also observed during this period, ranging from 7.7 to 55. Mean sexual maturity size (L50) for females was estimated at 64.6 cm (FL). In the studied area the species exhibited total spawning, with two synchronous groups. Testicles were histologically very similar making them impossible to differentiate sexual maturation stages. Considerable variation was observed in the male gonads weight, hampering the assessment of size at maturity. However, GI values for males were also higher from January to May. These results suggest that the spawning period of the rainbow runner in the São Pedro and São Paulo Archipelago occurs during the first semester of the year.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842011000100015&lng=en&tlng=enspawninggonadal indexfecundity |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
PB Pinheiro FHV Hazin P Travassos PGV Oliveira F Carvalho MG Rêgo |
spellingShingle |
PB Pinheiro FHV Hazin P Travassos PGV Oliveira F Carvalho MG Rêgo The reproductive biology of the rainbow runner, Elagatis bipinnulata (Quoy & Gaimard, 1825) caught in the São Pedro and São Paulo Archipelago Brazilian Journal of Biology spawning gonadal index fecundity |
author_facet |
PB Pinheiro FHV Hazin P Travassos PGV Oliveira F Carvalho MG Rêgo |
author_sort |
PB Pinheiro |
title |
The reproductive biology of the rainbow runner, Elagatis bipinnulata (Quoy & Gaimard, 1825) caught in the São Pedro and São Paulo Archipelago |
title_short |
The reproductive biology of the rainbow runner, Elagatis bipinnulata (Quoy & Gaimard, 1825) caught in the São Pedro and São Paulo Archipelago |
title_full |
The reproductive biology of the rainbow runner, Elagatis bipinnulata (Quoy & Gaimard, 1825) caught in the São Pedro and São Paulo Archipelago |
title_fullStr |
The reproductive biology of the rainbow runner, Elagatis bipinnulata (Quoy & Gaimard, 1825) caught in the São Pedro and São Paulo Archipelago |
title_full_unstemmed |
The reproductive biology of the rainbow runner, Elagatis bipinnulata (Quoy & Gaimard, 1825) caught in the São Pedro and São Paulo Archipelago |
title_sort |
reproductive biology of the rainbow runner, elagatis bipinnulata (quoy & gaimard, 1825) caught in the são pedro and são paulo archipelago |
publisher |
Instituto Internacional de Ecologia |
series |
Brazilian Journal of Biology |
issn |
1678-4375 |
description |
The rainbow runner, Elagatis bipinnulata, which belongs to the Carangidae family, has a circumtropical distribution. It is found throughout the Atlantic Ocean, from Massachusetts (USA) to Bahia (Brazil). The reproductive biology of the rainbow runner was studied, using specimens captured off the São Pedro and São Paulo Archipelago. From July 1999 to November 2003, a total of 352 fishes were analysed (201 females and 151 males). Fork length (FL) was measured and specimens were gutted for gonads collection. In the laboratory, gonads length, width and weight were measured, and sexes identified macroscopically. Through histological analysis, five different maturation stages were identified for females: immature, maturing, mature, spent and resting. A predominance of maturing and mature females was observed from January to May. The highest gonad index (GI) values were also observed during this period, ranging from 7.7 to 55. Mean sexual maturity size (L50) for females was estimated at 64.6 cm (FL). In the studied area the species exhibited total spawning, with two synchronous groups. Testicles were histologically very similar making them impossible to differentiate sexual maturation stages. Considerable variation was observed in the male gonads weight, hampering the assessment of size at maturity. However, GI values for males were also higher from January to May. These results suggest that the spawning period of the rainbow runner in the São Pedro and São Paulo Archipelago occurs during the first semester of the year. |
topic |
spawning gonadal index fecundity |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842011000100015&lng=en&tlng=en |
work_keys_str_mv |
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