Laboratory development of <em>Capitella</em> sp. A (Annelida: Capitellidae) from a NW Mediterranean fish farm reared under different organic enrichment conditions

Nuria Méndez

doi:10.3989/scimar.04450.08B

Autores/as

Nuria Méndez Unidad Académica Mazatlán. Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México

DOI:

https://doi.org/10.3989/scimar.04450.08B

Palabras clave:

poliqueto, Capitella capitata, desarrollo, reproducción, enriquecimiento orgánico, especies gemelas

Resumen

El poliqueto Capitella sp. A, procedente de una piscifactoría del Mediterráneo NO (Les Cases d’Alcanar, Tarragona, España), se cultivó por primera vez en condiciones experimentales en sedimentos con diferente contenido orgánico con el fin de estudiar su desarrollo y crecimiento. La especie resultó ser dioica, con desarrollo lecitotrófico. El tamaño de los individuos y la duración de las etapas del desarrollo variaron ampliamente, como ocurre en la mayoría de especies conocidas del género. En el sedimento con enriquecimiento orgánico se observaron juveniles un día después de la eclosión y hembras inmaduras (con ovarios amarillos) al cabo de 52 días. La aparición de oocitos intracelómicos blancos permitió estimar la edad de maduración de las hembras en unos 64 días, mientras que los adultos sobrevivieron durante 167 días. En función de su desarrollo, Capitella sp. A difiere de todas las especies lecitotróficas de Capitella conocidas. Estos resultados también demuestran que el enriquecimiento orgánico mejora el crecimiento y la supervivencia, mientras que una escasez de alimento puede provocar alteraciones morfológicas tales como la reducción en el tamaño de las espinas genitales de los machos.

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