Reproductive biology of the lane snapper, Lutjanus synagris, and recommendations for its management on the Abrolhos Shelf, Brazil
The reproductive biology of the lane snapper, Lutjanus synagris , was evaluated from 770 specimens (434 females and 336 males) obtained on the Abrolhos Bank, eastern Brazil, between May 2005 and October 2007. Total length ranged from 14.7 to 56.0 cm for females and from 16.5 to 54.3 cm for males, wi...
Published in: | Journal of the Marine Biological Association of the United Kingdom |
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Online Access: | http://dx.doi.org/10.1017/s0025315414001088 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315414001088 |
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crcambridgeupr:10.1017/s0025315414001088 2024-09-15T18:25:06+00:00 Reproductive biology of the lane snapper, Lutjanus synagris, and recommendations for its management on the Abrolhos Shelf, Brazil Freitas, Matheus Oliveira Rocha, Gecely Rodrigues Alves Chaves, Paulo De Tarso Da Cunha De Moura, Rodrigo Leão 2014 http://dx.doi.org/10.1017/s0025315414001088 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315414001088 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Journal of the Marine Biological Association of the United Kingdom volume 94, issue 8, page 1711-1720 ISSN 0025-3154 1469-7769 journal-article 2014 crcambridgeupr https://doi.org/10.1017/s0025315414001088 2024-08-07T04:03:38Z The reproductive biology of the lane snapper, Lutjanus synagris , was evaluated from 770 specimens (434 females and 336 males) obtained on the Abrolhos Bank, eastern Brazil, between May 2005 and October 2007. Total length ranged from 14.7 to 56.0 cm for females and from 16.5 to 54.3 cm for males, with size composition not varying significantly between sexes. Five distinct maturity stages were identified based on macroscopic and histological examination of the gonads. Mean value of the gonadosomatic index (GSI) for females peaked in September and October, with a secondary peak in February and March. Histological analyses confirmed the reproductive cycle inferred by GSI variation. Asynchronous-type ovarian development was observed, and batch fecundity ranged from less than 104,743 oocytes for a 25.5 cm female of to 568,400 oocytes for a 56.0 cm female (250.0 and 2260 g, respectively), with an average of 345,700 oocytes. The reproductive parameters obtained for L. synagris in the Abrolhos Bank were similar to those reported in studies in northern Brazil and the north-west Atlantic. The species is an important fishery resource in the study region, and management measures are needed before the species becomes overfished. Exploitation occurs largely during spawning aggregations, a situation that has caused other lane snapper populations (and congeners) to decline acutely elsewhere. Our results provide support for size limits and seasonal spawning closures on the Abrolhos Bank, a region that sustains artisanal fisheries involving >20,000 fishermen. Article in Journal/Newspaper North West Atlantic Cambridge University Press Journal of the Marine Biological Association of the United Kingdom 94 8 1711 1720 |
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Open Polar |
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Cambridge University Press |
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English |
description |
The reproductive biology of the lane snapper, Lutjanus synagris , was evaluated from 770 specimens (434 females and 336 males) obtained on the Abrolhos Bank, eastern Brazil, between May 2005 and October 2007. Total length ranged from 14.7 to 56.0 cm for females and from 16.5 to 54.3 cm for males, with size composition not varying significantly between sexes. Five distinct maturity stages were identified based on macroscopic and histological examination of the gonads. Mean value of the gonadosomatic index (GSI) for females peaked in September and October, with a secondary peak in February and March. Histological analyses confirmed the reproductive cycle inferred by GSI variation. Asynchronous-type ovarian development was observed, and batch fecundity ranged from less than 104,743 oocytes for a 25.5 cm female of to 568,400 oocytes for a 56.0 cm female (250.0 and 2260 g, respectively), with an average of 345,700 oocytes. The reproductive parameters obtained for L. synagris in the Abrolhos Bank were similar to those reported in studies in northern Brazil and the north-west Atlantic. The species is an important fishery resource in the study region, and management measures are needed before the species becomes overfished. Exploitation occurs largely during spawning aggregations, a situation that has caused other lane snapper populations (and congeners) to decline acutely elsewhere. Our results provide support for size limits and seasonal spawning closures on the Abrolhos Bank, a region that sustains artisanal fisheries involving >20,000 fishermen. |
format |
Article in Journal/Newspaper |
author |
Freitas, Matheus Oliveira Rocha, Gecely Rodrigues Alves Chaves, Paulo De Tarso Da Cunha De Moura, Rodrigo Leão |
spellingShingle |
Freitas, Matheus Oliveira Rocha, Gecely Rodrigues Alves Chaves, Paulo De Tarso Da Cunha De Moura, Rodrigo Leão Reproductive biology of the lane snapper, Lutjanus synagris, and recommendations for its management on the Abrolhos Shelf, Brazil |
author_facet |
Freitas, Matheus Oliveira Rocha, Gecely Rodrigues Alves Chaves, Paulo De Tarso Da Cunha De Moura, Rodrigo Leão |
author_sort |
Freitas, Matheus Oliveira |
title |
Reproductive biology of the lane snapper, Lutjanus synagris, and recommendations for its management on the Abrolhos Shelf, Brazil |
title_short |
Reproductive biology of the lane snapper, Lutjanus synagris, and recommendations for its management on the Abrolhos Shelf, Brazil |
title_full |
Reproductive biology of the lane snapper, Lutjanus synagris, and recommendations for its management on the Abrolhos Shelf, Brazil |
title_fullStr |
Reproductive biology of the lane snapper, Lutjanus synagris, and recommendations for its management on the Abrolhos Shelf, Brazil |
title_full_unstemmed |
Reproductive biology of the lane snapper, Lutjanus synagris, and recommendations for its management on the Abrolhos Shelf, Brazil |
title_sort |
reproductive biology of the lane snapper, lutjanus synagris, and recommendations for its management on the abrolhos shelf, brazil |
publisher |
Cambridge University Press (CUP) |
publishDate |
2014 |
url |
http://dx.doi.org/10.1017/s0025315414001088 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315414001088 |
genre |
North West Atlantic |
genre_facet |
North West Atlantic |
op_source |
Journal of the Marine Biological Association of the United Kingdom volume 94, issue 8, page 1711-1720 ISSN 0025-3154 1469-7769 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0025315414001088 |
container_title |
Journal of the Marine Biological Association of the United Kingdom |
container_volume |
94 |
container_issue |
8 |
container_start_page |
1711 |
op_container_end_page |
1720 |
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1810465508980424704 |