Identification of elasmobranchs in Caraguatatuba City, São Paulo State (2018-19) / Identificação de elasmobranquios em Caraguatatuba, SP (2018-19)

Nathalia Toyonaga Rodrigues, Marcelo Ricardo de Souza, Janice Peixer, Alberto Ferreira de Amorim

Resumo


The variety of common names in fish causes problems in fishing catch estimates, which can hamper the administration and management of fish stocks. The production of elasmobranchs in Caraguatatuba City, SP has increased in the last 10 years, with reports of various categories of endangered species. The lack of basic information, degradation of the environment and the under-exploitation of fisheries, are the biggest enemies to create a species conservation policy and a sustainable development of fisheries. Therefore, January 2018 to January 2019, was monitored the landings of elasmobranchs captured by artisanal fishing in the city of Caraguatatuba, SP and information was collected regarding identification from the fisherman's point of view and weighing of specimens. All specimens were identified for a study to analyze the estimation of shark and ray’s species that occur in the region. The analyzed species were categorized, according to the Instituto de Pesca (Official Database of Instituto de Pesca, SP) as: “cação-rola-rola”, known as sharpnose shark (Rhizoprionodon lalandii and R. porosus), “cambeva” group of hammerhead sharks (Sphyrna lewini), “cação-galha-preta”, spinner shark (Carcharhinus brevipinna), “machote”, group of small sharks (Carcharhinus obscurus). In the ray’s group, “Viola”, group of guitarfish (Pseudobatos horkelii, P. percellens e Zapteryx brevirostris) and “raias-agrupadas”, are a group of ray’s species that were not or could not be categorized in any group (Aetobatus narinari, Dasyatis hypostigma, Gymnura altavela, Gymnura micrura, Hypanus americanus, Hypanus guttatus, Rioraja agassizi and Rhinoptera bonasus). The study aims to show an existence of basic flaws in the information contained in the Database of the Instituto de Pesca, in relation to the data collected in the municipality of Caraguatatuba, SP, Brazil and how misinformation can affect fisheries sustainability and conservation of elasmobranchs.

 


Palavras-chave


fisheries management, conservation, shark and ray, fisheries sustainability, fishery stocks

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Referências


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DOI: https://doi.org/10.34188/bjaerv4n1-039

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