The influence of temporal variation of some limnological parameters on finfish assemblage in Osun River, Nigeria.

The Journal of Basic and Applied Zoology

Research

Adetola Jenyo-Oni¹  Adams Iyiola² 

[1] Department of Aquaculture and Fisheries Management, Faculty of Renewable Natural Resources, University of Ibadan, 23402, Ibadan, Oyo state, Nigeria;Department of Aquaculture and Fisheries Management, Faculty of Renewable Natural Resources, University of Ibadan, 23402, Ibadan, Oyo state, Nigeria;Department of Fisheries and Aquatic Resources Management, College of Agriculture and Renewable Natural Resources, Osun State University, P.M.B. 4494, 23439, Osogbo, Osun State, Nigeria;

关键词: Fish abundance;    Human activities;    River Osun;    Sustainability;    Water quality parameters;   

DOI  :  10.1186/s41936-023-00342-w

 received in 2022-08-19, accepted in 2023-05-31,  发布年份 2023

来源: Springer

【 摘 要 】

BackgroundAnthropogenic activities is a major factor that determines the condition and sustainability of an environment. The nature and type of activities will determine the health, ecosystem services and general well-being of the environment. These activities have increased as a result of industrialization and urbanization, notwithstanding pressure on fish species for balanced nutrition and economic returns. The paucity of documented information about the limnological parameters and finfish assemblage in Osun River nessiciated this study.ResultsMean temperature (18.7 ± 2.69 °C) and dissolved oxygen (3.2 ± 0.54 mg/L) values were below the recommended limit for fish survival, pH (7.1 ± 0.25) and ammonia (1.2 ± 0.18 mg/L) were within and above the recommended limits. The river had a total of 4544 finfish belonging to 11 families and 19 species. Chrysichthys nigrodigitatus, sampling zone A and Cichlid family had the highest abundance in the river with 21.00%, 24.20% and 32.50% respectively.Fin fish abundance had a negative relationship between dissolved oxygen (r = − 0.032), ammonia (r = − 0.668), pH (r = − 0.819); temperature and DO with ammonia(r = − 0.668, r = − 0.590) and pH (r = − 0.043, r = − 0.011) respectively. Dissolved oxygen (b = − 137.1), ammonia (b = − 522) and pH (b = − 93.4) had a negative effect on finfish assemblage in the river. Significant correlated values (p < 0.05) were observed between fin fish and temperature (p = 0.008), ammonia (p = 0.017), pH (p = 0.001). dissolved oxygen (b = − 2.14), ammonia (b = − 2.72) and pH (b = − 1.97) had a negative association with fin fish abundance while significance (p < 0.05) were observed with dissolved oxygen (p = 0.048).ConclusionIt is worthy to note that human activities principally dictates the quality and quantity of limnological parameters which directly affect finfish assemblage; therefore proper environmental management is essential for sustenance of finfish in the river as elaborated by the United Nations Sustainable Development Goals.

【 授权许可】

CC BY   
© The Author(s) 2023

【 图 表 】

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