Estrategias reproductivas en el sable negro (Aphanopus carbo Lowe, 1839) en el Atlántico nordeste

Autores/as

  • Ana Neves Departamento de Biologia Animal and Centro de Oceanografia, Faculdade de Ciências da Universidade de Lisboa
  • Ana Rita Vieira Departamento de Biologia Animal and Centro de Oceanografia, Faculdade de Ciências da Universidade de Lisboa
  • Inês Farias Unidade de Recursos Marinhos e Sustentabilidade, IPIMAR
  • Ivone Figueiredo Unidade de Recursos Marinhos e Sustentabilidade, IPIMAR
  • Vera Sequeira Departamento de Biologia Animal and Centro de Oceanografia, Faculdade de Ciências da Universidade de Lisboa
  • Leonel Serrano Gordo Departamento de Biologia Animal and Centro de Oceanografia, Faculdade de Ciências da Universidade de Lisboa

DOI:

https://doi.org/10.3989/scimar.2009.73s2019

Palabras clave:

sable negro, skip spawning, fecundidad, atresia, Portugal

Resumen


Las gónadas del sable negro del Atlántico nordeste fueron examinadas para conocer la biología reproductiva de esta especie. Los resultados sobre el tipo de fecundidad mostraron que la especie tenía una fecundidad determinada en base a los siguientes hechos: (i) hiato entre ovocitos previtelogénicos y vitelogénicos; (ii) aumento de tamaño de los ovocitos vitelogénicos durante el período de puesta; (iii) ausencia de incremento en el número permanente de ovocitos vitelogénicos avanzados durante el período de puesta y (iv) una pequeña atresia en los ovarios antes de la ovulación y durante ella. Las estimaciones de fecundidad se establecieron entre 73 y 373 ovocitos g-1 hembra. La comparación de los ovarios de hembras en desarrollo de aguas frente a Portugal continental y las de Madeira mostró una diferencia significativa en el tamaño medio de los ovocitos entre las dos áreas, y que las hembras de Madeira presentaron una mayor cantidad de ovocitos con alvéolos corticales y un índice gonadosomático mayor. A partir de julio y en hembras recolectadas frente a Portugal de continente, todos los individuos comenzaron a sufrir una atresia generalizada en sus ovocitos, mientras que en las aguas de Madeira, el ciclo reproductivo continúa hasta ovulación. Sin embargo, en algunas hembras de Madeira la gametogénesis también se paraliza y todos los ovocitos vitelogénicos son absorbidos vía atresia folicular. El porcentaje de hembras no reproductivas varió del 21.23% en 2006 al 37.4% en 2005.

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Publicado

2009-12-31

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1.
Neves A, Vieira AR, Farias I, Figueiredo I, Sequeira V, Serrano Gordo L. Estrategias reproductivas en el sable negro (Aphanopus carbo Lowe, 1839) en el Atlántico nordeste. Sci. mar. [Internet]. 31 de diciembre de 2009 [citado 23 de julio de 2024];73(S2):19-31. Disponible en: https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1143

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