Population dynamics of Scomberomorus brasiliensis from a small-scale fishery off Southern Brazil
Scomberomorus brasiliensis is the most important fish species of the small-scale fishery off the southwestern Atlantic north of the La Plata estuary. For management purposes, this study evaluated their reproductive biology, size, age and growth along the Paraná coast. Monthly samples (March 2018-Ju...
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Instituto Oceanográfico da Universidade de São Paulo
2024-04-01
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| Series: | Ocean and Coastal Research |
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| Online Access: | https://www.journals.usp.br/ocr/article/view/224228 |
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| author | Paulo de Tarso da Cunha Chaves Pollyana Olbera Birnfeld André Martins Vaz-dos-Santos |
| author_facet | Paulo de Tarso da Cunha Chaves Pollyana Olbera Birnfeld André Martins Vaz-dos-Santos |
| author_sort | Paulo de Tarso da Cunha Chaves |
| collection | DOAJ |
| description |
Scomberomorus brasiliensis is the most important fish species of the small-scale fishery off the southwestern Atlantic north
of the La Plata estuary. For management purposes, this study evaluated their reproductive biology, size, age and growth
along the Paraná coast. Monthly samples (March 2018-June 2020) from the fishery comprised 933 specimens (413 males,
520 females), 210-779 mm fork length, corresponding to a size smaller than in the northern areas. It presented negative
allometry (b = 2.69159, length-weight relationship). Specimens in all stages of maturity occurred during the study period,
indicating spawning in the area from October to June, peaking from January to March. The gonad–length relationship was
suitable to confirm this assessment. Individual fecundity varied between 34,484 and 390,786 oocytes. Maturity occurred
at L50 = 446.46 mm, t50 = 1.4 years, and L100 = 588.79 mm, and t100 = 2.3 years. The growth parameters were L∞ = 771.68 mm,
k = 0.65 year-1 and t0
= -0.102 years, with cohorts aged from 0.5 to 6.5 years. Scomberomorus brasiliensis along the Paraná
coast constitutes a self-sustaining group, not directly related to that from northeastern Brazil. This small-scale fishery is not
currently negatively affecting stock level; it is essential to monitor these attributes to detect future changes or impacts.
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| format | Article |
| id | doaj-art-301ea307b3f546358672bb90465c2ab3 |
| institution | DOAJ |
| issn | 2675-2824 |
| language | English |
| publishDate | 2024-04-01 |
| publisher | Instituto Oceanográfico da Universidade de São Paulo |
| record_format | Article |
| series | Ocean and Coastal Research |
| spelling | doaj-art-301ea307b3f546358672bb90465c2ab32025-08-20T02:55:42ZengInstituto Oceanográfico da Universidade de São PauloOcean and Coastal Research2675-28242024-04-0169Population dynamics of Scomberomorus brasiliensis from a small-scale fishery off Southern BrazilPaulo de Tarso da Cunha ChavesPollyana Olbera BirnfeldAndré Martins Vaz-dos-Santos Scomberomorus brasiliensis is the most important fish species of the small-scale fishery off the southwestern Atlantic north of the La Plata estuary. For management purposes, this study evaluated their reproductive biology, size, age and growth along the Paraná coast. Monthly samples (March 2018-June 2020) from the fishery comprised 933 specimens (413 males, 520 females), 210-779 mm fork length, corresponding to a size smaller than in the northern areas. It presented negative allometry (b = 2.69159, length-weight relationship). Specimens in all stages of maturity occurred during the study period, indicating spawning in the area from October to June, peaking from January to March. The gonad–length relationship was suitable to confirm this assessment. Individual fecundity varied between 34,484 and 390,786 oocytes. Maturity occurred at L50 = 446.46 mm, t50 = 1.4 years, and L100 = 588.79 mm, and t100 = 2.3 years. The growth parameters were L∞ = 771.68 mm, k = 0.65 year-1 and t0 = -0.102 years, with cohorts aged from 0.5 to 6.5 years. Scomberomorus brasiliensis along the Paraná coast constitutes a self-sustaining group, not directly related to that from northeastern Brazil. This small-scale fishery is not currently negatively affecting stock level; it is essential to monitor these attributes to detect future changes or impacts. https://www.journals.usp.br/ocr/article/view/224228Reproductive biologyGrowthArtisanalManagementSouthwestern Atlantic |
| spellingShingle | Paulo de Tarso da Cunha Chaves Pollyana Olbera Birnfeld André Martins Vaz-dos-Santos Population dynamics of Scomberomorus brasiliensis from a small-scale fishery off Southern Brazil Ocean and Coastal Research Reproductive biology Growth Artisanal Management Southwestern Atlantic |
| title | Population dynamics of Scomberomorus brasiliensis from a small-scale fishery off Southern Brazil |
| title_full | Population dynamics of Scomberomorus brasiliensis from a small-scale fishery off Southern Brazil |
| title_fullStr | Population dynamics of Scomberomorus brasiliensis from a small-scale fishery off Southern Brazil |
| title_full_unstemmed | Population dynamics of Scomberomorus brasiliensis from a small-scale fishery off Southern Brazil |
| title_short | Population dynamics of Scomberomorus brasiliensis from a small-scale fishery off Southern Brazil |
| title_sort | population dynamics of scomberomorus brasiliensis from a small scale fishery off southern brazil |
| topic | Reproductive biology Growth Artisanal Management Southwestern Atlantic |
| url | https://www.journals.usp.br/ocr/article/view/224228 |
| work_keys_str_mv | AT paulodetarsodacunhachaves populationdynamicsofscomberomorusbrasiliensisfromasmallscalefisheryoffsouthernbrazil AT pollyanaolberabirnfeld populationdynamicsofscomberomorusbrasiliensisfromasmallscalefisheryoffsouthernbrazil AT andremartinsvazdossantos populationdynamicsofscomberomorusbrasiliensisfromasmallscalefisheryoffsouthernbrazil |