@article{fdi:010067395, title = {{E}stimating {G}hanaian purse seine and baitboat catch during 2006-2013 : input data for 2015 bigeye stock assessment}, author = {{C}hassot, {E}mmanuel and {A}yivi, {S}. and {F}loch, {L}aurent and {D}amiano, {A}lain and {D}ewals, {P}atrice}, editor = {}, language = {{ENG}}, abstract = {{G}hanaian industrial tuna fisheries data covering the period 2006-2013 were analyzed following guidelines provided during the {ICCAT} preparatory meeting for the 2015 assessment of bigeye tuna ({T}hunnus obesus; {BET}). {T}o account for differences in fishing strategy and quality of data sources available, the fleet was split between a component of large purse seiners and a component composed of baitboats and purse seiners that can collaborate at sea. {F}irst, the total {T}ask {I} was derived from information on landings and logbooks for the first and second fleet components, respectively. {S}econd, the monthly proportion of catch and spatial distribution on a 5°x5° grid were derived from logbook data with some necessary assumptions when data were missing. {T}hird, species composition of the catch was estimated from the size samples collected onboard {E}uropean purse seiners from fishing sets made on fish aggregating devices based on three processing areas. {B}igeye represented about 15% in the ‘offshore’ area while its percentage in the catch was about 7-8% in areas closer to the shore during the same period. {S}ize samples collected by {MFRD} during 2006-2013 showed that the distribution of bigeye caught by {G}hanaian vessels differed from that of {E}uropean purse seiners on {FAD}s.}, keywords = {{PECHE} {THONIERE} ; {SENNEUR} ; {CAPTURE} ; {THON} ; {DISTRIBUTION} {SPATIALE} ; {EFFORT} {DE} {PECHE} ; {ANALYSE} {STATISTIQUE} ; {ATLANTIQUE} ; {GHANA}}, booktitle = {}, journal = {{C}ollective {V}olume of {S}cientific {P}apers - {ICCAT}}, volume = {72}, numero = {2 ({SCRS}/2015/139)}, pages = {485--496}, ISSN = {1021-5212}, year = {2016}, URL = {https://www.documentation.ird.fr/hor/fdi:010067395}, }