Southernmost occurrence of <i>Epinephelus marginatus</i> in the south‐west Atlantic

Rico, M. Rita; M., E.

doi:10.1111/j.1095-8649.2003.00271.x

Cited by 19 publications

(16 citation statements)

References 4 publications

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“…It is usually found in relatively shallow waters (<80 m), occurring on both sides of Atlantic Ocean throughout the Mediterranean Sea and round the southern tip of Africa to southern Mozambique and Madagascar (Heemstra & Randall, 1993). In the western Atlantic, its range is restricted to the coast of South America, from Rio de Janeiro southwards to Argentina (Figueiredo & Menezes, 1980;Rico & Acha, 2003;Luiz Jr. et al, 2004). The 'Molhes da Barra de Rio Grande' (MBRG), a man-made rock substrate (rocky jetty), 4.5 km long, located in the municipality of Rio Grande (southern Brazil) connecting a large coastal lagoon to the Atlantic Ocean, probably constitutes the southernmost limit of this species along the Brazilian coast (Condini et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Age, growth, and reproductive aspects of the dusky grouper Mycteroperca marginata (Actinopterygii: Epinephelidae) in a man-made rocky habitat in southern Brazil

et al. 2011

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The dusky grouper, Mycteroperca marginata, is an important commercial marine fish that is currently considered an endangered species worldwide and listed as overexploited in Brazil. Although its reproductive biology has been studied elsewhere, no information is available for populations in its southernmost distribution limit on the Brazilian coast. The present work investigates age structure, growth and reproduction of individuals inhabiting a pair of rocky jetties, about 4.5 km long each, located in the mouth of Patos Lagoon in the municipality of Rio Grande, in the southwestern Atlantic Ocean. A total of 130 individuals obtained between February 2007 and May 2009 were analyzed, with total length ranging from 260 to 800 mm. The growth coefficient found in the present study (K: 0.069) was lower than values reported for dusky grouper populations from the Mediterranean Sea (0.087) and southeast Africa (0.09). This difference could be related to higher average water temperatures in these regions compared to the current study site or due to poorer habitat quality in terms of the shelters available for dusky grouper individuals to establish their territories. Microscopic ovarian analyses of individuals during three years of sampling revealed only the occurrence of immature and resting females. The absence of ripe or post-spawning individuals, associated with low GSI values (<0.2) over the studied months, indicates that the dusky grouper did not use this man-made rocky substrate as a spawning site. The current L 50 estimate of 451.3 mm indicates that most individuals captured in this area are immature. Such fishing pressure on immature specimens, associated with its slow growth rates and complex reproductive characteristics, threatens sustainability of the current dusky grouper fishery at the study site.A garoupa-verdadeira, Mycteroperca marginata, é uma espécie de importância comercial que atualmente é considerada como ameaçada mundialmente e sobre-explotada no Brasil. Embora sua biologia reprodutiva tenha sido estudada em outras regiões, nenhuma informação está disponível sobre populações que habitam o extremo sul da sua distribuição na costa brasileira. O presente trabalho investiga a estrutura de idade, crescimento e reprodução de indivíduos que habitam dois molhes de pedra, com cerca de 4,5 km de extensão cada, localizados na desembocadura da laguna dos Patos no município de Rio Grande, no Atlântico Sudoeste. Foram analisados 130 indivíduos obtidos entre fevereiro de 2007 e maio de 2009, com comprimento total entre 260 e 800 mm. O coeficiente de crescimento no presente estudo (K: 0,069) foi inferior aos valores reportados para o Mediterrâneo (0,087) e sudeste da África (0,09). Essa diferença pode estar relacionada a temperaturas médias maiores nessas regiões comparadas ao presente local de estudo ou devido a menor qualidade de habitat em termo de abrigos para os indivíduos de garoupa-verdadeira estabelecerem seus territórios. Análises microscópicas dos ovários dos indivíduos durante esses três anos de amostragens...

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Section: Introductionmentioning

confidence: 99%

Age, growth, and reproductive aspects of the dusky grouper Mycteroperca marginata (Actinopterygii: Epinephelidae) in a man-made rocky habitat in southern Brazil

et al. 2011

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“…In the Western Atlantic this fish occurs in Brazil, with its southernmost distribution in Argentina [1]. In Brazil, it is caught frequently in artisanal fisheries of the southern coast, Santa Catarina State and the southeastern coast (São Paulo and Rio de Janeiro States) [2].…”

Section: Introductionmentioning

confidence: 99%

Ecology and ethnoecology of dusky grouper [garoupa, Epinephelus marginatus (Lowe, 1834)] along the coast of Brazil

Begossi¹,

Silvano

2008

J Ethnobiology Ethnomedicine

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Dusky grouper (garoupa, Epinephelus marginatus) is an important catch for several artisanal smallscale fisheries along the Brazilian coast. It is a sedentary, monandric, and late maturing protogynous species, which makes it vulnerable to overharvesting even though it is mainly caught through hook and line or spear fishing through free diving. Lack of information on the ecology and biology of this species in Brazil is astonishing. Much of the information found in the literature concerns Mediterranean dusky groupers. Studies compiling local knowledge (ethnoecology) about fish species complement biological data, and have been fundamental for effective fisheries management. In this study, our objectives are to obtain data about dusky grouper through fish catches and analysis of stomach contents and gonad maturation (macroscopic analyses), along with interviews from fishermen from six small-scales communities from the southern (Pântano do Sul, Florianópolis, Santa Catarina State) to the northern Brazilian coast (Porto Sauípe, Bahia State). We conclude that precautionary approaches and 'data-less' management approaches are needed in the coast of Brazil. Research on this species and on the potential of aquaculture for its cultivation, are urgent, due to the apparent vulnerability and decrease of dusky grouper along the coast of Brazil.

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“…The occasional presences of tropical and subtropical fishes in Argentinean waters are well documented in the literature (Cousseau and Figueroa, 1989;Díaz de Astarloa and Figueroa, 1995;Díaz de Astarloa et al, 2000;Figueroa et al, 2000;Rico and Acha, 2003;Scenna et al, 2006;Solari et al, 2010;Spath et al, 2012;Delpiani et al, 2013). The Argentinean marine biogeographic province (Briggs and Bowen, 2012) is characterized by the encounter between the warm, southward-flowing Brazilian Current, and the cold, northward flow, of the Malvinas Current (Figueroa et al, 1998) and water discharge of continental output (Lucas et al, 2005).…”

Section: Discussionmentioning

confidence: 71%

First report of the black gemfish Nesiarchus nasutus (Perciformes: Gempylidae) in Argentinean waters

et al. 2015

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The gempylid Nesiarchus nasutus is reported for the first time from Argentinean waters, the southernmost occurrence of the species in the Southwestern Atlantic. This suggests that the fluctuating environmental characteristics of the area would be proper for the presence of tropical and subtropical species.Keywords: southwestern Atlantic, Brazilian current, trichiuroids fish, deep-sea. Primeiro relatório do gemfish preto Nesiarchus nasutus (Perciformes: Gempylidae) em águas argentinas ResumoA ocorrência de Nesiarchus nasutus é registrado pela primeira vez em águas argentinas, sendo a esta ocorrência mais meridional da espécie no Atlântico Sudoeste. Isto sugere que as características ambientais flutuantes da área seriam adequadas para a presença de espécies tropicais e subtropicais na mesma. Palavras-chave:Atlântico ocidental sul, corrente do Brasil, trichiuroidea, águas profundas.

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Southernmost occurrence of Epinephelus marginatus in the south‐west Atlantic

Abstract: The southernmost occurrence of the dusky grouper Epinephelus marginatus in the south-west Atlantic (Argentina) was recorded at 36 S, expanding its range 1200 km southward from that previously reported.

Cited by 19 publications

References 4 publications

Age, growth, and reproductive aspects of the dusky grouper Mycteroperca marginata (Actinopterygii: Epinephelidae) in a man-made rocky habitat in southern Brazil

Age, growth, and reproductive aspects of the dusky grouper Mycteroperca marginata (Actinopterygii: Epinephelidae) in a man-made rocky habitat in southern Brazil

Ecology and ethnoecology of dusky grouper [garoupa, Epinephelus marginatus (Lowe, 1834)] along the coast of Brazil

First report of the black gemfish Nesiarchus nasutus (Perciformes: Gempylidae) in Argentinean waters

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