@incollection{fdi:010077641, title = {{F}ish population structure and its relation to fisheries yield in small reservoirs in {C}{\^o}te d'{I}voire}, author = {{T}ito de {M}orais, {L}uis}, editor = {}, language = {{ENG}}, abstract = {{L}ack of reliable data on the fisheries of northern {C}{\^o}te d'{I}voire reservoirs is a major limitation for management of the fish stocks. {A}s individual reservoirs cannot be studied due to the high costs and lack of trained investigators, empirical and production models have to be used to evaluate exploitation rates and fisheries potential. {D}aily yield ({DY}, in kg fishing day-1 year-1) and total catch ({TC}, in kg year-1) appear to be better descriptors than annual yield (in kg ha-1 year-1). {TC} is related to variables linked to nutrient availability (watershed area, conductivity and {M}orphoedaphic {I}ndex). {DY} is related to fish species richness and to reservoir area, indicating that fish population structure could be a key to understanding the patterns observed. {C}orrelation between fish population structure and yield was significant. {I}t was hypothesised that overall catch, {TC}, is related to nutrient availability, but that catch per unit effort is related to the presence of given species in the reservoirs, and particularly to the presence of bottom feeding species.}, keywords = {{POISSON} {D}'{EAU} {DOUCE} ; {STRUCTURE} {DE} {POPULATION} ; {ESTIMATION} {DE} {STOCK} ; {GESTION} {DES} {PECHES} ; {PECHE} {ARTISANALE} ; {RESERVOIR} ; {LAC} ; {DISPONIBILITE} {EN} {NUTRIMENTS} ; {MODELISATION} ; {COTE} {D}'{IVOIRE}}, booktitle = {{M}anagement and ecology of lake and reservoir fisheries}, numero = {}, pages = {112--122}, address = {{O}xford}, publisher = {{B}lackwell - {F}ishing {N}ew {B}ooks}, series = {}, year = {2002}, DOI = {10.1002/9780470995679.ch10}, ISBN = {0-85238-283-9}, URL = {https://www.documentation.ird.fr/hor/fdi:010077641}, }