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

Fiche du document

Date

7 septembre 2015

Discipline
Type de document
Périmètre
Langue
Identifiant
Source

eJournals

Relations

Ce document est lié à :
https://ejournals.epublishing.ekt.gr/index.php/hcm [...]

Organisation

EKT ePublishing




Citer ce document

M. C. MANGANO et al., « Trawling disturbance effects on the trophic ecology of two co-generic Astropectinid species », eJournals, ID : 10670/1.r2c8ao


Métriques


Partage / Export

Résumé 0

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.  

document thumbnail

Par les mêmes auteurs

Sur les mêmes sujets

Sur les mêmes disciplines

Exporter en