ENVIRONMENTAL PARAMETERS AND THE DYNAMICS OF FISH RESOURCES IN LEKKI LAGOON, SOUTH-WEST, NIGERIA.

• W.O. Abdul

  Department of Aquaculture and Fisheries Management, Federal University of Agriculture Abeokuta, Abeokuta Ogun State, Nigeria.

  Author

• K.E. Oguntuase

  Department of Aquaculture and Fisheries Management, Federal University of Agriculture Abeokuta, Abeokuta Ogun State, Nigeria.

  Author

• E.O. Adekoya

  Department of Aquaculture and Fisheries Management, Federal University of Agriculture Abeokuta, Abeokuta Ogun State, Nigeria.

  Author

• A.F. Braide

  Department of Aquaculture and Fisheries Management, Federal University of Agriculture Abeokuta, Abeokuta Ogun State, Nigeria.

  Author

• D.O. Odulate

  Department of Aquaculture and Fisheries Management, Federal University of Agriculture Abeokuta, Abeokuta Ogun State, Nigeria.

  Author

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 (Berger- Parker dominance, Simpson's diversity, 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 2 (r =98.50%) correlation environmental variables related to fish abundance.

1. W.O. Abdul, Department of Aquaculture and Fisheries Management, Federal University of Agriculture Abeokuta, Abeokuta Ogun State, Nigeria.

   Department of Aquaculture and Fisheries Management, Federal University of Agriculture Abeokuta, Abeokuta Ogun State, Nigeria.

2. K.E. Oguntuase, Department of Aquaculture and Fisheries Management, Federal University of Agriculture Abeokuta, Abeokuta Ogun State, Nigeria.

   Department of Aquaculture and Fisheries Management, Federal University of Agriculture Abeokuta, Abeokuta Ogun State, Nigeria.

3. E.O. Adekoya, Department of Aquaculture and Fisheries Management, Federal University of Agriculture Abeokuta, Abeokuta Ogun State, Nigeria.

   Department of Aquaculture and Fisheries Management, Federal University of Agriculture Abeokuta, Abeokuta Ogun State, Nigeria.

4. A.F. Braide, Department of Aquaculture and Fisheries Management, Federal University of Agriculture Abeokuta, Abeokuta Ogun State, Nigeria.

   Department of Aquaculture and Fisheries Management, Federal University of Agriculture Abeokuta, Abeokuta Ogun State, Nigeria.

5. D.O. Odulate, Department of Aquaculture and Fisheries Management, Federal University of Agriculture Abeokuta, Abeokuta Ogun State, Nigeria.

   Department of Aquaculture and Fisheries Management, Federal University of Agriculture Abeokuta, Abeokuta Ogun State, Nigeria.

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