Aspectos alimentares a nível populacional e individual de Pimelodus argenteus, uma espécie de peixe nativa do Pantanal Sul, Brazil
DOI:
https://doi.org/10.20950/1678-2305/bip.2024.50.e850Palavras-chave:
Peixes, Dieta populacional, Especialização individual, Variação individual, Reserva da biosfera, Patrimônio mundialResumo
O Pantanal é altamente importante do ponto de vista ambiental e econômico e sofre com as mudanças ambientais e a antropização. Pimelodus argenteus é uma espécie nativa do pantanal sul, Mato Grosso do Sul, e importante para a pesca artesanal e alimentação das populações ribeirinhas. Diante dos pressupostos, este estudo teve como objetivos caracterizar a dieta e os hábitos alimentares de P. argenteus e verificar se há variação e especialização individual na dieta no período avaliado. Para isso, os exemplares foram adquiridos de um pescador artesanal em outubro de 2017 no Rio Miranda, Pantanal sul-matogrossense. A dieta da população foi variável, composta de 18 itens alimentares, e sua guilda trófica foi determinada como carnívora/malacófaga. Observamos variação individual e especialização na dieta em nível individual. Também foi observado o consumo de bivalves com alto potencial invasivo e itens não orgânicos, indicando influências antrópicas. Esses resultados levantam questões sobre os possíveis impactos a longo prazo sobre as espécies nativas e economicamente importantes. Além disso, sugerimos que a especialização individual possa ter ocorrido em resposta a pressões competitivas. Por fim, nossos resultados podem fornecer informações ecológicas para fundamentar planos de conservação dessa espécie nativa e desse bioma com importantes funções ecossistêmicas.
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Copyright (c) 2024 Bruna Caroline Kotz Kliemann, Nayara Yuri Mitsumori Alvares, Lidiane Franceschini, Bianca da Silva Miguel, Aymar Orlandi Neto, Igor Paiva Ramos
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