Incidência da pesca de arrasto camaroneiro sobre peixes em atividade reprodutiva: uma avaliação no litoral norte de Santa Catarina, Brasil.

Pina, Juliana Ventura de; Chaves, Paulo de Tarso

doi:10.5088/atl.2009.31.1.99

Cited by 13 publications

(15 citation statements)

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“…Already, the number of taxa obtained by Pina and Chaves (2009) along the northern coast of Santa Catarina during the same sampling time was higher for all previously mentioned groups (31 families and 72 species). The sediment of the two sampled areas was similar, with sand fractions predominant, corroborating what had been ascertained for nearby fishing grounds (Abreu, Menezes, and Rosa, 2006;Corrêa et al, 1996).…”

Section: Discussionmentioning

confidence: 85%

Seasonality of Ichthyofauna Bycatch in Shrimp Trawls from Different Depth Strata in the Southern Brazilian Coast

Filho

Branco

Monteiro

et al. 2015

Journal of Coastal Research

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Rodrigues-Filho, J.L.; Branco, J.O.; Monteiro, H.S.; Verani, J.R., and Barreiros, J.P., 2015. Seasonality of ichthyofauna bycatch in shrimp trawls from different depth strata in the southern Brazilian coast. Journal of Coastal Research, 31(2), 378-389. Coconut Creek (Florida), ISSN 0749-0208.Changes in the species composition and ecological descriptors of fish assemblages in terms of abiotic factors such as depth, temperature, salinity, and granulometry were analyzed. Monthly trawls, from October 2003 to September 2004 (30 minutes each) were analyzed in two areas covering an important shrimp fishing site of the Brazilian coast. Results using bifactorial analysis of variance revealed a seasonal variation of environmental variables (p , 0.05), and granulometry analyses showed that the composition of the fishing grounds was similar-mostly sand. A total of 12,613 fish were collected: 7880 in area I and 4733 in area II. The highest values of capture in numerical abundance (catch per unit effort) occurred during winter. Fifty taxa were caught in area I, and 53 taxa were caught in area II. Both values are considered high when compared to previous studies conducted in nearby areas. Sciaenidae was the most speciose family in all samples and in both areas were dominant in number of species (37 species in area I and 42 species in area II). Cynoscion striatus was the most abundant and dominant species in both areas. Estimates of ecological descriptors, such as richness, diversity, and evenness, showed that the ichthyofauna structure was strongly influenced by climatic factors, and all values were more pronounced during fall and winter. The permutational multivariate analysis of variance demonstrated that ichthyofauna species composition differs among seasons. The Student's t test applied a posteriori showed that the community composition differed (significantly) in the following comparisons: spring vs. fall (p , 0.05) and winter vs. summer (p , 0.05). According to similarity percentage analysis, changes in the community structure were mainly correlated with species classified as abundant, which occurred unevenly during the different periods. Our results show that the fish community is influenced by seasonal variations such as salinity and temperature but not by depth or sand grain sizes. ADDITIONAL INDEX WORDS:Fishing, abiotic factors, ecological descriptors, specific composition.

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Section: Discussionmentioning

confidence: 85%

Seasonality of Ichthyofauna Bycatch in Shrimp Trawls from Different Depth Strata in the Southern Brazilian Coast

Filho

Branco

Monteiro

et al. 2015

Journal of Coastal Research

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“…These species are described as the most frequent and with more individuals present in discards of seabob shrimp trawling in southern Brazil (SOUZA;CHAVES, 2007;PINA;CHAVES, 2009). This fact proves the generalist and opportunistic feeding behavior of L. dominicanus, since it uses the resources that are more abundant and widely available in time and space as is the case of the discard of shrimp fleet (WHITTINGTON; MARTIN, 2006;CARNIEL;KRUL, 2012;SILVA-COSTA;BUGONI, 2013).…”

Section: Discussionmentioning

confidence: 86%

Does the closed fishing season influence the ichthyofauna consumed by Larus dominicanus?

2017

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Does the closed fishing season influence the ichthyofauna consumed by Larus dominicanus?Fish that are incidentally caught by shrimp trawling represent a predictable and abundant resource for feeding several bird species, especially for the gull Larus dominicanus. This fishing activity is subject to disruptions throughout the year during closed fishing seasons, when other fishing modalities are exercised, which can alter the composition, abundance and size of the fish bycatch. This study evaluated the influence of the restriction of fishing period of shrimp (closed season) on the diet of L. dominicanus, on the Paraná State coast. From December 2013 to August 2014, 10 pellets were collected per month in two distinct areas that have shrimp trawl fishery as the main economic activity: one continental and another in an estuarine island. In total, 920 fish were identified, divided into four families and 15 species, especially the family Sciaenidae with 11 species. There were differences in abundance and biomass of species between areas and between seasons of pre-closure, closure and post-closure. Differences for the mean total length of the species were only detected between the pre-closed and closed seasons in one area. This study evidenced the strong relationship between L. dominicanus and the shrimp trawl fishery, the species composition identified in the pellets and their respective morphometric measurements follow the same pattern of the literature for fish discarded in trawling activities. As capturas incidentais de peixes no arrasto do camarão representam um recurso abundante para a alimentação de muitas aves, sobretudo para a gaivota Larus dominicanus. O presente estudo avaliou a influência do defeso da pesca de arrasto do camarão sobre a dieta de L. dominicanus no litoral do estado do Paraná. Entre dezembro de 2013 e agosto de 2014 foram coletados 10 pellets alimentares por mês em duas áreas distintas, em períodos sem e com a influência do defeso do camarão sete-barbas. Ao todo, foram identificados 920 peixes, divididos em quatro famílias e 15 espécies, com destaque para a família Sciaenidae, com 11 espécies. Foram identificadas diferenças na abundância e biomassa das espécies entre as áreas e entre os períodos de pré-defeso, defeso e pós-defeso. Diferenças em relação ao comprimento total médio das espécies só foram encontradas entre o pré-defeso e defeso em uma das áreas. Com este trabalho, foi possível observar a forte relação entre L. dominicanus e a pesca de arrasto do camarão, a composição das espé-cies identificadas nos pellets e as estimativas de comprimento seguem o mesmo padrão do que a literatura traz para os peixes descartados nas atividades de arrasto. resumo Descritores: Descarte de pesca, Pesca do camarão, Defeso, Aves marinhas, Brasil. AbstrAct

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“…Furthermore, many individuals are often caught before reaching the size of first sexual maturity (Pina & Chaves, 2009). Research on prawn fishery bycatch has been limited to recording and quantifying species (Vianna & Almeida, 2005).…”

Section: Introductionmentioning

confidence: 99%

Sustainability of capture of fish bycatch in the prawn trawling in northeastern Brazil

Júnior¹,

Araújo²,

Feitosa³

2013

Neotrop. ichthyol.

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The prawn fishery produces more discards than any other type of catch and captures a large quantity of immature individuals. This research aimed to assess the sustainability of capture of fish bycatch in prawn trawling. Each species was assessed according to two groups of criteria: (1) their relative vulnerability to capture by trawl and mortality due to this fishery (2) recovery capacity of the specie after a possible collapse of the population. Within each group, each species was ranked (1-3), being 1 the highest value, meaning the species is highly susceptible to capture or has a low resilience. A total of 8,894 individuals were caught, belonging to 28 families. The species with capture least sustainable were Stellifer rastrifer and Isopisthus parvipinnis. These latter species are highly susceptible since they are either benthic or demersal, and their diet may include benthic organism. Chirocentrodon bleekerianus and Anchoa tricolor were the most likely fishes to be sustainable since they are pelagic, they are least susceptible to capture by trawls, and also have a greater capacity to recover, as most individuals have bred before capture. Due to the fishery's multi-specific nature, it is difficult to implement mitigation measures for specific species. Thus, the creation of fishing exclusion zones should be considered as the most appropriate management measure.A pesca de arrasto de camarão produz mais descarte do que qualquer outra pescaria e captura uma grande quantidade de indivíduos imaturos. Esta pesquisa visa determinar a sustentabilidade da captura da ictiofauna acompanhante na pesca de arrasto de camarão. Cada espécie foi analisada de acordo com dois grupos de critérios: (1) vulnerabilidade à captura pela rede de arrasto e mortalidade ocasionada por esta pescaria; e (2) capacidade de recuperação da população para minimizar. Dentro de cada critério as espécies foram classificadas de 1 a 3, sendo 1 o valor mais alto, indicando que a espécie é altamente susceptível à captura ou tem baixa capacidade de recuperação. Um total de 8.894 indivíduos foram capturados, pertencendo a 28 famílias. As espécies com captura menos sustentável foram Stellifer rastrifer e Isopisthus parvipinnis. Estas espécies são altamente susceptíveis, pois são bentônicas ou demersais e suas dietas incluem organismos bentônicos. Chirocentrodon bleekerianus e Anchoa tricolor foram as espécies que apresentaram a captura mais sustentável. Por serem pelágicas, são menos susceptíveis à captura por arrastos de fundo, além disto, apresentaram uma grande capacidade de recuperação, pois a maior parte dos indivíduos capturados encontrava-se acima do seu tamanho de primeira maturação sexual. Devido à natureza multiespecífica da pescaria é difícil implementar medidas mitigatórias específicas. Assim, a criação de zona de exclusão de pesca deve ser considerada como a medida de manejo mais adequada.

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Incidência da pesca de arrasto camaroneiro sobre peixes em atividade reprodutiva: uma avaliação no litoral norte de Santa Catarina, Brasil.

Cited by 13 publications

References 2 publications

Seasonality of Ichthyofauna Bycatch in Shrimp Trawls from Different Depth Strata in the Southern Brazilian Coast

Seasonality of Ichthyofauna Bycatch in Shrimp Trawls from Different Depth Strata in the Southern Brazilian Coast

Does the closed fishing season influence the ichthyofauna consumed by Larus dominicanus?

Sustainability of capture of fish bycatch in the prawn trawling in northeastern Brazil

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