Distribution of Catfish Families in Agulu and Nawfia Lakes in Anambra State, Nigeria
Keywords:
Catfish, Distribution, Agulu, Nawfia, LakeAbstract
An evaluation of the distribution and abundance of catfish families in Agulu and Nawfia Lakes in Anambra State, Nigeria is the major aim of this research. The lakes located in the same basin were being gradually silted by gully erosion. They were sampled with fishing efforts of the artisanal fishermen. Bamboo traps, cast nets, hooks and line, long line with hooks and set nets were used during the sampling. A total of 4 catfish families were encountered. Individual species of the group were sorted out and enumerated according to families. The data were tabulated to reflect species and their families. Chi-square and correlation coefficient were used in analysis of the data. Highest percentage of bagrid fish was recorded in gulu Lake. Nawfia Lake had the highest record of clariid fish. More Chrysichthyes species were collected at the open water than the shore habitat of Agulu Lake. In Nawfia Lake Clarias gariepinus ranked highest at the open water, while Chysichthyes furcatus ranked highest at the shore. The occurrence rate of the family Clariidae was lower in Agulu than Nawfia Lake, probably as a result of attack by Crocodylus cataphractus. The aquatic predators were visibly more abundant in Agulu than Nawfia Lake. Controlling their population would probably ensure high survival rate, and abundance of the clariid fish. Systematic control of erosion and some expansion work around Nawfia Lake, would enhance sustainable management of the fishery resources in the study area.
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