Faraj A. auteur aut IRD Bez Nicolas auteur aut IRD text journalArticle eng text/pdf reformatted digital access The common octopus (Octopus vulgaris) is the target species of the cephalopod fishery that exploits two stocks, Dakhla and Cap Blanc, off southern Morocco (26 degrees N 21 degrees N), an area commonly referred to as the Saharan Bank. Octopus vulgaris is also one of the most abundant demersal species in this highly productive area, and plays a key role in the upwelling ecosystem. Spatial patterns of the main phases of the octopus vulgaris life cycle of the Dakhla stock are described, using trawl surveys carried out twice a year from 1998 to 2003. Using geostatistics and spatial indicators, mature females and juveniles are analysed and mapped to characterize the main features of the spawning and recruitment phases. There 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. Our results suggest that the spatial pattern of the Octopus vulgaris Dakhla stock is different from that of the same species in other ecosystems such as the Mediterranean. 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. specialized accessibility indices cephalopod fishery Dakhla stock geostatistics GIS Octopus vulgoris recruitment spatial indicators spatial patterns spawning 040 020 64 9 1820-1828 2007 1054-3139 https://www.documentation.ird.fr/hor/fdi:010093142 10.1093/icesjms/fsm160 1054-3139 [F B010093142] https://www.documentation.ird.fr/hor/fdi:010093142 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/2025-04/010093142.pdf IRD - Base Horizon / Pleins textes 2008-05-30 2025-04-02 fdi:010093142 fre