Temporal and along-shelf distribution of the larval fish assemblage at Gran Canaria, Canary Islands

Marta Moyano; Santiago Hernández-León

doi:10.3989/scimar.2009.73s1085

Autores/as

Marta Moyano Laboratorio de Oceanografía Biológica. Facultad de Ciencias del Mar. Universidad de Las Palmas de Gran Canaria
Santiago Hernández-León Laboratorio de Oceanografía Biológica. Facultad de Ciencias del Mar. Universidad de Las Palmas de Gran Canaria

DOI:

https://doi.org/10.3989/scimar.2009.73s1085

Palabras clave:

ictioplancton, asociaciones de larvas, mesozooplancton, variaciones estacionales, iluminación lunar

Resumen

Se estudiaron las variaciones temporales y espaciales en la comunidad de larvas de peces de la isla de Gran Canaria (Islas Canarias) a partir de muestreos semanales desde octubre 2005 a junio 2006. Se identificaron un total de 156 taxones, pertene- cientes a 51 familias y 15 órdenes. La familia Myctophidae fue la más abundante (30%), seguida por Sparidae (11%), Clupei- dae (9%) y gonostomatidae (7%). Como es de esperar en una isla oceánica, los taxones neríticos y oceánicos contribuyeron en proporciones similares. Se encontraron dos zonas de retención para huevos y larvas de especies neríticas, a sotavento y barlovento de la isla. Sin embargo, la estacionalidad mostró una mayor influencia en la estructura de la comunidad larvaria que la zona de muestreo, siendo ésta no significativa a largo plazo. Se observaron dos asociaciones estacionales de larvas correspondiendo con los dos períodos más característicos en la columna de agua: periodo de mezcla (invierno) y de estrati- ficación (verano). además, se encontró una relación significativa entre la iluminación lunar y la biomasa del zooplancton de pequeño tamaño, que podría ser extensible a las larvas neríticas. Las larvas neríticas más abundantes (Sparidae) mostraron una relación con el ciclo lunar, apoyando parcialmente una hipótesis reciente sobre el efecto de la iluminación lunar en la supervivencia larvaria y su desarrollo en aguas subtropicales.

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