Abstract
The Diversity of fish species, composition and abundance from Bodna River in Kwali Area Council, Abuja was studied between May 2018 to April 2019.The aim of the study was to determine the management and sustainable use of the fisheries resources of the Area council. About 1331 fish were collected from the artisanal fishermen during the study period and morphometric indices were determined using standard methods. The fish were identified and counted. Sex ratio 1:2:1 (Males to Females) was obtained indicating a male dominated population. Length –weight measurement indicated that the fish exhibited positive allometric growth pattern. The highest percentage abundant species in the site were Oreochromis niloticus with 34.8% Clarias garienpinus with 28.0% and Pellonula leonensis with 17.6% and the least occurring species were Nannocharax shariensis with 11.0% Mormyrus valenciensis with 7.7%. The seasonal variation of fish distribution was observed to be higher in the wet season with 66.2% than the dry season. Nutrient displayed greater impact on fish abundance in the wet season. The Simpson and Shannon Weiner’s diversity index values were (0.976) and (-1.456) in both richness and evenness respectively. The findings of the study could be helpful to the artisanal fishermen and the community for fisheries sustainability.
Highlights
Water is a unique liquid, it is essential for life and the most important medium through which living organisms can grow and flourish, (Bellingham, 2012)
The mean abundance and composition of fish in Bodna River are presented in table 1.Five fish species belonging to five families were recovered in Bodna River from May, 2018 to April, 2019
Claridae was represented by a species Clarias garienpinus, Cichlidae with a species Oreochromis niloticus, Mormyridae with a species Mormyrus valenciensis, Clupeidae with a species Pellonulaleonensis and Distichodontidae was represented by a species Nannocharax shariensis
Summary
Water is a unique liquid, it is essential for life and the most important medium through which living organisms can grow and flourish, (Bellingham, 2012). Rivers are vital and vulnerable freshwater systems that are critical for the sustenance of all life, providing main water resources for domestic, industrial and agricultural purposes (Farah et al 2002). Aquatic eco systems are critical component of global environment. In addition to being essential contribution to biodiversity and ecological productivity, it provides a variety of services for human population such as water for drinking, irrigation, recreational opportunity and habitat for economically important fishes, (Dankishiya et al,2013).A healthy environment is necessary for any organism because life depends upon the continuance of a proper exchange of essential substances and energies between the organism and aquatic surrounding (Omoigberale et al, 2007). Fish is highly perishable especially in the tropics, where high temperature and humidity accelerates spoilage of fish. Poor handling, inadequate processing facilities, lack of ice or storage facilities, remoteness of the fishing villages to urban market centers, poor transportation system and poor distribution channel have drastically reduced fish utilization in the tropics, (Ayeloja et al, 2016)
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