Abstract
The study investigated the plankton diversity and abundance of three selected on-farm research fish ponds in Nigerian Institute for Oceanography and Marine Research, Lagos. Samples were taken from three ponds using standard procedure and physico- chemical features of the water bodies were measured. Plankton of class ( Bacillariophyceae, Chlorophyceae, Cyanophyceae and Euglenophyceae I) and Zooplanktons of ( Cladocera, Rotifera and Copepoda ) family were found. There were varying results for the phytoplaktons and zooplaktons respectively during the study. The highest percentage composition for phytoplankton was recorded in Pond 1 (94.11%), and the highest Shannon-Weaner diversity (1.265%) in pond 2. The highest percentage of zooplankton was recorded in pond 2 (91.67%). Utilizing the parameter of Shannon index value, the abundance value for zooplaktons was not remarkable. Statistical association between parameters and abundance reflected that abundance was positively correlated with temperature, and negatively correlated with pH while the levels of dissolved oxygen (DO) were positively correlated. The low densities and plankton diversity in pond 3 was an indication of low pH and high transparency as a result of nutrient depletion. Keywords : Abundance; physico-chemical factors; phytoplankton; zooplankton; fish ponds
Highlights
The richness of planktons and its interaction with the environment as essential for fish production. Wetzel (1989) showed that fresh water production which influences the growth of fish, is influenced by its physical, chemical, and biological contents
Wetzel (1989) further showed that fresh water production which influences the growth of fish is influenced by its physical, chemical, and biological contents
Santhosh and Singh (2007) established that the relationship between the physico-chemical parameters of water quality and plankton production in fish ponds is of great importance to fish culture
Summary
The richness of planktons and its interaction with the environment as essential for fish production. Wetzel (1989) showed that fresh water production which influences the growth of fish, is influenced by its physical, chemical, and biological contents. Wetzel (1989) further showed that fresh water production which influences the growth of fish is influenced by its physical, chemical, and biological contents. Abowei (2010) reported that the population density of plankton production and its distribution is a greatly influenced by physical, chemical and environmental factors. Santhosh and Singh (2007) established that the relationship between the physico-chemical parameters of water quality and plankton production in fish ponds is of great importance to fish culture. Reasonable fish production is greatly influenced by biological and physo-chemical qualities of water (Ugwumba and Ugwumba, 1993; Santhosh and Singh, 2007). Several studies on the physical and chemical parameters on some indigenous habitats had been undertaken (APHA, 1991; Boyd, 1998)
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