Aquat. Living Resour.
Volume 26, Number 4, October-December 2013
Deep-Sea Fisheries and Stocks
|Page(s)||343 - 353|
|Section||Deep-Sea Fisheries and Stocks|
|Published online||19 December 2013|
Spatial overlap between the leafscale gulper shark and the black scabbardfish off Portugal
Divisão de Modelação e Gestão de Recursos da Pesca, Departamento
de Mar e Recursos Marinhos, IPMA, Instituto Português do Mar e da
a Corresponding author: email@example.com
Received: 21 January 2013
Accepted: 5 December 2013
Information about the spatial distribution of bycatch species and their spatial overlap with the target species is essential for fisheries management. The present study used fishery-dependent data (vessel monitoring systems, logbooks and official daily landings) to study the spatial distribution and overlap between black scabbardfish Aphanopus carbo and leafscale gulper shark Centrophorus squamosus taken by the longline fishery operating off mainland Portugal. The geostatistical method kriging was applied to estimate the distribution of the leafscale gulper shark in relation to black scabbardfish and thus assess the impact of the fishery on the leafscale gulper shark. Results indicate that in fishing grounds where the black scabbardfish is more abundant, the relative occurrence of deepwater sharks is reduced. These findings have implications for alternative management measures to be adopted in this particular fishery, particularly where it concerns the minimization of deepwater shark bycatch.
Key words: Spatial distribution / Spatial overlap / Bycatch / Deep-sea fish / Centrophorus squamosus / Aphanopus carbo / Northeast Atlantic Ocean
© EDP Sciences, IFREMER, IRD 2013
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.