Cambios a largo plazo de la madurez de la sardina, Sardina pilchardus, en aguas portuguesas

Autores/as

  • Alexandra Silva Instituto Português do Mar e da Atmosfera (IPMA)
  • Sara Faria Instituto Português do Mar e da Atmosfera (IPMA) - Cascais Ambiente
  • Cristina Nunes Instituto Português do Mar e da Atmosfera (IPMA)

DOI:

https://doi.org/10.3989/scimar.03852.03A

Palabras clave:

madurez, condición, sardina, aguas portuguesas

Resumen


Se describen los cambios a largo plazo de la madurez de la sardina utilizando muestras recogidas desde 1947 en los desembarcos en la costa oeste de Portugal. Las estimas de la talla de primera madurez al 50% (L50) fueron calculadas en 44 años del periodo de estudio y se mostraron como una buena aproximación de la talla de madurez de los individuos desovantes de primer año de vida (Lp50 peces de edad 0-1). La probabilidad de madurar de la sardina a una talla determinada disminuye desde principios de los años 50 hasta finales de los años 60, correspondiendo a un aumento de 2 cm en ambas tallas, L50 y Lp50. Esta tendencia cambió a principio de los años 70 y se detuvieron a mediados de los años 90. La tendencia de la sardina a madurar a tallas inferiores se correlacionó positivamente con la mejora de la condición corporal en la estación de crecimiento que precedía a la madurez. Las tendencias a largo plazo de la madurez y la condición corporal eran paralelas a las tendencias en la temperatura superficial del mar reportadas en la literatura. Los resultados sugieren que la madurez a tallas pequeñas está influida directamente por el aumento de la temperatura, que temperaturas más elevadas mejoran la condición mediante un aumento de la eficiencia en la alimentación o a una combinación de ambas. Por otra parte, no encontramos evidencias de que la presión de la pesca haya contribuido a los cambios a largo plazo en la madurez de la sardina.

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Publicado

2013-09-30

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1.
Silva A, Faria S, Nunes C. Cambios a largo plazo de la madurez de la sardina, Sardina pilchardus, en aguas portuguesas. Sci. mar. [Internet]. 30 de septiembre de 2013 [citado 19 de mayo de 2024];77(3):429-38. Disponible en: https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1472

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