Journal
AQUACULTURE RESEARCH
Volume 42, Issue 7, Pages 996-1010Publisher
WILEY
DOI: 10.1111/j.1365-2109.2010.02683.x
Keywords
aquaculture; artisanal fisheries; Boops boops; body condition; gut contents; physiology; fatty acids
Categories
Funding
- Instituto Alicantino de Cultura Juan Gil Albert, Excma. Diputacion de Alicante (Spain)
- Ministerio de Ciencia e Innovacion (Spanish Goverment) [CTM2009-14362-C02-01]
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Coastal aquaculture installations concentrate large numbers of wild fish species of both ecological and economic importance, including schools of bogue, Boops boops (L.), in high abundance and biomass. The aggregated species consume large quantities of the easily available pellets lost from cages. As a consequence, the physical condition of farm-associated wild fish is increased and their physiology is altered. These changes may influence local fisheries as many of these aggregating species are targeted by fishers. We assess whether local fishers catch wild fish that have previously aggregated at fish farms by comparing the body condition, trophic indexes, diet overlap and the fatty acid (FA) composition of B. boops obtained from local fish markets and around fish farms. Bogue captured by trammel-nets and around fish farms facilities presented a similar biological condition, as well as high quantities of pellets in the gut, and their FA profile was affected by vegetal-derived FAs. In contrast, bogue captured by trawlers were not influenced by fish farms, as they consumed natural trophic resources. We conclude that artisanal fishers exploit these aggregated fish populations once they have dispersed away from farms, and benefit from a 'biomass export' from fish farms at a local scale.
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