Competencia por el alimento entre el cormorán moñudo, el cormorán grande y la pesca artesanal: un caso de estudio

Autores/as

DOI:

https://doi.org/10.3989/scimar.04680.04B

Palabras clave:

competencia, pesquerías, cormorán grande, depredación, cormorán moñudo, sintopía

Resumen


El cormorán moñudo (Phalacrocorax aristotelis desmarestii) y el cormorán grande (P. carbo sinensis) son especies sintópicas en el entorno de Isla Grosa y la laguna costera del Mar Menor (SE de España, Mediterráneo occidental) durante la época de reproducción del primero que coincide con la invernada del segundo. Se estudia la composición de la dieta de ambas especies mediante la identificación de otolitos en sus egagrópilas, y se evalúa la competencia entre ambas especies y con la pesca artesanal local. El cormorán moñudo se alimentó mayoritariamente de pequeños peces pelágicos, y el cormorán grande consumió principalmente peces demersales. La dieta del cormorán moñudo consistió estrictamente de peces marinos, mientras que el cormorán grande capturó peces en los diferentes ambientes acuáticos de la zona de estudio, incluyendo especies marinas, de lagunas costeras e incluso de embalses de agua dulce. La gran disimilitud observada entre la composición de la dieta de ambas aves nos indica que no existe competencia por el alimento entre ellas. Asimismo, la baja densidad poblacional de cormorán moñudo y su esfuerzo pesquero en la zona de estudio tampoco demuestran competencia con la pesca artesanal local. Por el contrario, la abundancia de cormorán grande en la zona de estudio es muy alta, y se alimentaron principalmente de especies de alto valor comercial para los pescadores locales. No obstante, solo se observó competencia con la pesca artesanal local por alguna especie de pez de las menos abundantemente capturadas por los pescadores.

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Publicado

2018-03-30

Cómo citar

1.
Aguado-Giménez F, Eguía-Martínez S, Torres-Campos I, Meroño-García S, Martínez-Ródenas J. Competencia por el alimento entre el cormorán moñudo, el cormorán grande y la pesca artesanal: un caso de estudio. Sci. mar. [Internet]. 30 de marzo de 2018 [citado 2 de mayo de 2025];82(1):7-15. Disponible en: https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1745

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