Limnological evaluation of the fisheries potentials and productivity of a small shallow tropical African reservoir

 

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Autor: K. Mustapha, Moshood
Formato: artículo original
Estado:Versión publicada
Fecha de Publicación:2009
Descripción:Morphometrics and physico-chemical parameters of Oyun reservoir, Offa, Nigeria (a small shallow tropical African Reservoir) were used to estimate the potential fish yield of the reservoir according to the morpho-edaphic index (MEI). Physico-chemical characteristics of the water body were sampled monthly from three stations between January 2002 and December 2003 with standard methods. Estimates of the potential fish yield were obtained using the physico-chemical characteristics of the reservoir and the relationship Y = 23.281 MEI 0.447, where Y is the potential fish yield in kg/ha, MEI is the morpho-edaphic index (given in µS/cm and estimated by dividing the mean conductivity by the mean depth). The reservoir mean depth and conductivity values were 2.6m and 113.10µS/cm respectively, while its potential fish yield was estimated at 125.72 kg/ha. This estimate was higher than other small shallower and larger African reservoirs. The reservoir high ionic content, high nutrient and dissolved oxygen levels, good pH, low level of pollution and shallow depth were responsible for the high estimate of the fish yield. In order to realize this high potential fish yield and sustainable exploration of the fisheries, effective management of the reservoir to curb eutrophication should be adopted, while other management practices such as stocking and conservation of desirable and indigenous fish species, implementation of fishing regulations and adoption of best management practices should be implemented.
País:Portal de Revistas UCR
Institución:Universidad de Costa Rica
Repositorio:Portal de Revistas UCR
Lenguaje:Inglés
OAI Identifier:oai:portal.ucr.ac.cr:article/5449
Acceso en línea:https://revistas.ucr.ac.cr/index.php/rbt/article/view/5449
Palabra clave:rendimiento pesquero potencial
índice morfo-edáfico
conductividad
profundidad media
embalse
potential fish yield
morpho-edaphic index
conductivity
mean depth
reservoir