Can length structure of English Channel cephalopod landings reveal trends in exploitation? ...

• Main Authors: Deguines, A., Bouali, A., Robin, J. P.
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: ASC 2007 - Theme session O 2024
• Subjects: Fisheries and aquaculture; Northeast Atlantic
• Online Access: https://dx.doi.org/10.17895/ices.pub.25258300.v1; https://ices-library.figshare.com/articles/conference_contribution/Can_length_structure_of_English_Channel_cephalopod_landings_reveal_trends_in_exploitation_/25258300/1

No abstracts are to be cited without prior reference to the author.The need of alternative methods for the assessment of fishing pressure is often advocated in Cephalopod stocks in relation with their short life span and presumably variable life traits. English Channel Loliginid squid and cuttlefish are among the first Cephalopod resources in the Northeast Atlantic. English Channel fishery data collection programmes have already enabled to apply slightly modified versions of 'classical single species methods' like monthly cohort analysis. The present study revisits landings length frequency sampling (which is carried out at the Port-en-Bessin fish market and now extends over a number of months) and analyses if length structures can reveal changes in cohort exploitation patterns. Changes in length structure are explored via multivariate correspondence analysis (CA) in which variables (i.e. length-classes) and records (i.e. sampling dates) can be plotted simultaneously. The largest dataset concerns Loligo ...