Competition for food between the Mediterranean shag, the great cormorant and artisanal fisheries: a case study

Isotopic signatures revealed high mobility patterns for cormorants, illustrating differences between roosting and feeding areas (spatially well separated). Cormorants roosting in open sea move to inland freshwater bodies, their trophic niche overlapping that of individuals settled there. Similarly, individuals settled around transitional waters (coastal lagoon), seem to divide the predation pressure between different food sources along the marine-continental gradient. Recently in Spain, the Great Cormorant has been devoid of legal protection due to its supposed impact on fisheries. Our methods provide a useful and non-invasive tool that can be used as a first step for assessing such interaction. On the basis of its dispersed feeding distribution and expected predation pressure the cormorant does not seem to represent a serious threat to recreational or commercial fisheries which would justify downgrading its protection.

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Aguado-Gimenez F. Eguia-Martinez S. Torres-Campos I. Merono-Garcia S. y Martinez-Rodenas J. Competition for food between the Mediterranean shag the great cormorant and artisanal fisheries: a case study. CSIC, 2017. https://doi.org/10.3989/scimar.04680.04B

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Retrieved: 15 Nov 2025 07:40:25
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Resource type Article
Date of creation 2024-11-05
Date of last revision 2024-11-05
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Metadata identifier 280b473c-0a0b-5f27-85ed-b97e05f10cfd
Metadata language Spanish
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High-value dataset category Earth observation and environment
ISO 19115 topic category biota
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Name of the dataset creator Aguado-Gimenez, F., Eguia-Martinez, S., Torres-Campos, I., Merono-Garcia, S. y Martinez-Rodenas, J.
Name of the dataset editor CSIC
Other identifier DOI: 10.3989/scimar.04680.04B
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Email of the dataset creator felipe.aguado@carm.es
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