NEW RECORD OF CARCHARHINUS LEUCAS IN AN AMAZONIAN RIVER SYSTEM
DOI:
https://doi.org/10.18764/1981-6421e2020.6Keywords:
Bull sharks, Tocantins River basin, Neotropical regionAbstract
ABSTRACT
Carcharhinus leucas is a cosmopolitan shark species in tropical and subtropical waters. Normally, individuals are found in most of the major rivers in the world but records in the Amazon basin are somewhat scarce. Here we provide a new record of a young of the year female bull shark caught in Cametá (PA) as bycatch of the bottom longline fi shery, weighing 8 kg and measuring 90 cm total length. The Brazilian Amazon coast and its freshwater systems are one of the only areas where records of small young of the year and juveniles exist for the Atlantic Ocean on the Neotropical region. Therefore, this information is important to direct future research on habitat use and reproductive
patterns for the species in this region, since this could be a crucial area for the species conservation.
Resumo
Carcharhinus leucas é uma espécie de tubarão cosmopolita que vive em ambientes tropicais e subtropicais. Geralmente são encontradas na maioria dos rios do mundo, mas os seus registros nas bacias hidrográfi cas amazônicas são escassos. Neste estudo apresentamos um novo registro de uma fêmea juvenil de tubarão cabeça-chata capturada em Cametá (PA) como fauna acompanhante da pesca de espinhel, pesando 8 kg e medindo 90 cm de comprimento total. O Litoral Amazônico Brasileiro e os seus sistemas fl uviais são alguns dos únicos ambientes onde indivíduos jovens do ano e juvenis podem ser encontrados na região Neotropical do oceano Atlântico. Portanto, estas informações são importantes para delinear futuros estudos sobre o uso de habitat e padrões reprodutivos para a espécie nesta região, uma vez que esta área pode ser crucial para sua conservação desta espécie.
Palavras-chave: Tubarão cabeça-chata; Bacia do rio Tocantins; Região Neotropical.
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