@article{PAR00002350, title = {{S}patial considerations for the {D}akhla stock of {O}ctopus vulgaris : indicators, patterns, and fisheries interactions}, author = {{F}araj, {A}. and {B}ez, {N}icolas}, editor = {}, language = {{ENG}}, abstract = {{T}he common octopus ({O}ctopus vulgaris) is the target species of the cephalopod fishery that exploits two stocks, {D}akhla and {C}ap {B}lanc, off southern {M}orocco (26 degrees {N} 21 degrees {N}), an area commonly referred to as the {S}aharan {B}ank. {O}ctopus vulgaris is also one of the most abundant demersal species in this highly productive area, and plays a key role in the upwelling ecosystem. {S}patial patterns of the main phases of the octopus vulgaris life cycle of the {D}akhla stock are described, using trawl surveys carried out twice a year from 1998 to 2003. {U}sing geostatistics and spatial indicators, mature females and juveniles are analysed and mapped to characterize the main features of the spawning and recruitment phases. {T}here are clear distinctions between the spatial patterns of the spawning and recruitment phases: juveniles are more coastal, less spatially dispersed, more anisotropically distributed, and more patchy. {O}ur results suggest that the spatial pattern of the {O}ctopus vulgaris {D}akhla stock is different from that of the same species in other ecosystems such as the {M}editerranean. {GIS} reveals that the spawning-stock biomass is globally more accessible to the industrial fleet than to the artisanal one, a finding contrary to contemporary thinking and with important resource management implications.}, keywords = {accessibility indices ; cephalopod fishery ; {D}akhla stock ; geostatistics ; {GIS} ; {O}ctopus vulgoris ; recruitment ; spatial indicators ; spatial patterns ; spawning}, booktitle = {}, journal = {{I}ces {J}ournal of {M}arine {S}cience}, volume = {64}, numero = {9}, pages = {1820--1828}, ISSN = {1054-3139}, year = {2007}, DOI = {10.1093/icesjms/fsm160}, URL = {https://www.documentation.ird.fr/hor/{PAR}00002350}, }