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This study accessed the effects of environmental parameters on the dynamics of fish resources in Lekki lagoon,
Nigeria. The catch data of fish species were estimated from commercial landings between January and June, 2016 in
nine (9) distinct sampling stations. Collected fish species were identified using standard identification guide while the
physico-chemical parameters of the lagoon were determined using standard procedures. Data collected were
subjected to univariate indices ( , Richness index, Shannon's indicies),
and multivariate analysis, using PRIMER software. This study recorded 40 species of 25 families during the period of
study; Chrysicththys nigrodigitatus contributed the highest (23.09%) catch while Erpetoichthy calabaricus
contributed the least (0.023%) catch.. Margalef diversity and Pielou evenness indices were highest in Station VI
(2.934, 0.785 respectively) while Shannon-Wienner index and Simpson's index of dominance were both highest in
Station II (2.621 and 0.899 respectively), while, the least values of Margalef diversity, Pielou evenness were recorded
in Stations I (0.352), III (0.5517), IV (0.833) and IX (0.706). Multivariate analysis showed that environmental
gradient and fish abundance was significantly (p < 0.42) correlated with pH, electrical conductivity, sulphate,
phosphate, nitrate, alkalinity and salinity in the lagoon. Distance-based linear model (DistLM) indicated the strong
(r2=98.50%) correlation environmental variables related to fish abundance.
Key words: Fish resources, Lagoon, Environmental parameters, Coastal waters, Multivariate analysis