Ultrassonografia na gestão reprodutiva da sardinha-verdadeira Sardinella brasiliensis
DOI:
https://doi.org/10.20950/1678-2305/bip.2026.52.e1001Palavras-chave:
Aquicultura, Clupeidae, Diagnóstico por imagem, Peixes marinhos, SexagemResumo
A sardinha-verdadeira é uma espécie de grande importância econômica e ecológica, amplamente explorada pela pesca comercial. Sua reprodução em cativeiro apresenta desafios, especialmente pelo pequeno porte da espécie, que inviabiliza o uso de técnicas invasivas, como a canulação, para determinação sexual e avaliação gonadal. A ultrassonografia, cada vez mais utilizada em programas de reprodução na aquicultura, destaca-se por ser uma ferramenta não invasiva, rápida e eficiente para identificação do sexo e análise reprodutiva. Neste estudo, 55 sardinhas foram anestesiadas para avaliação ultrassonográfica, utilizando um transdutor linear multifrequencial com frequências entre 8 e 13 MHz. As imagens capturadas evidenciaram diferenças de ecogenicidade entre as gônadas. Nas fêmeas, os ovários apresentaram aspecto hiperecogênico e heterogêneo, enquanto nos machos os testículos exibiram padrão hipoecogênico e homogêneo, em comparação às estruturas corporais adjacentes. Para a confirmação dos resultados, foram realizadas análises macroscópicas, que exigiram a eutanásia de todos os peixes, e análises histológicas. Essas análises permitiram não apenas validar a sexagem com uma acurácia de 98,18%, identificando 46 machos e nove fêmeas, mas também determinar as fases de maturação gonadal de cada indivíduo. Tanto na avaliação macroscópica quanto na microscópica foi possível observar características específicas das gônadas que indicaram as fases de desenvolvimento reprodutivo, contribuindo para uma compreensão mais detalhada do ciclo reprodutivo da espécie.
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Direitos autorais (c) 2026 Sabrina Lara Luz, Ingrith Aparecida Mazuhy Santarosa, Maria Alcina Martins de Castro, Carolina Perenguez Riofrio, Letícia Cordeiro Koppe de França, Everton Danilo dos Santos, Bernardo Viero de Oliveira, Aline Brum, Caio Magnotti
Este trabalho está licenciado sob uma licença Creative Commons Attribution 4.0 International License.
