Trawling disturbance effects on the trophic ecology of two co-generic Astropectinid species

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Semantic enrichment/homogenization by EKT
Trawling disturbance effects on the trophic ecology of two co-generic Astropectinid species (EN)

PORPORATO, E. M.D.
KAISER, M. J.
MANGANO, M. C.
LAMBERT, G. I.
SPANÒ, N.

Physical disturbance by trawling can have both negative and positive effects on populations of scavenging benthic organisms. In the present study the impact of fishing activity on feeding behaviour of the two Astropectinids, Astropecten bispinosus and A. irregularis, was assessed based on stomach contents analysis. The study was carried out along trawled seabed highlighting the positive response of the two facultative scavengers to carrion generated by trawl disturbance. Furthermore, there was greater food specialization in areas that were more heavily exploited by trawling. This specialisation could be linked to the availability of certain prey that results from the passage of fishing gears across the seabed. Interestingly, differences between the two species analysed have been highlighted in term of population dynamic, feeding rate, diet composition and diet diversity, testifying their capacity to coexist in the same fishing grounds.   (EN)

info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion

Scavengers, Stomach contents analysis, Energy subsidy, Vessel Monitoring System data, Ecosystem approach, Southern Tyrrhenian Sea. (EN)

Ελληνικό Κέντρο Θαλασσίων Ερευνών (ΕΛΚΕΘΕ) (EL)
Hellenic Centre for Marine Research (HCMR) (EN)

Mediterranean Marine Science

2015-09-07


Hellenic Centre for Marine Research (EN)

Mediterranean Sea (EN)

1791-6763
1108-393X
Mediterranean Marine Science; Vol 16, No 3 (2015); 538-549 (EL)
Mediterranean Marine Science; Vol 16, No 3 (2015); 538-549 (EN)



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