Diversity, distribution and abundance of fish species in Lake Asejire, Oyo State, Nigeria
نویسندگان
چکیده
Aquatic systems in Nigeria have suffered stress induced by human activities which alter the natural composition of water resources. This study investigated diversity, distribution and abundance fish species Lake Asejire. The lake was partitioned based on accessibility into upper, middle lower sections for study. Fish were sampled using monofilament gill nets with stretched mesh sizes ranging from 44.45-169.33mm. Water fortnightly a period twelve months. quality parameters: temperature (28.96±0.28oC), dissolved oxygen (5.6±0.13mg/l), pH (6.73±0.19) conductivity (159.8±0.32μS/cm) measured within suitable standard ranges production waters. A total 16 10 families identified lake. Cichlids had highest number (4) relative (66.82%) Coptodon zillii most abundant across months sampling stations (27.53%). section (52.90%) while upper least (16.14%) catch (13.35%) November. richness decreased (S=16) to (S=14), highly diversified (H=0.73) combined value H=0.67 evenly distributed evenness (E=0.22). Simpson’s index region (D=0.30) there high probability picking different at random. Trophic grouping showed forage carnivore (F/C) ratio 2.06 indicating an unbalanced population food habit, should be addressed. There is need proper regulation such as enforcement fishing seasons trophic levels ensure sustainability resources
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ژورنال
عنوان ژورنال: The Zoologist
سال: 2023
ISSN: ['1596-972X']
DOI: https://doi.org/10.4314/tzool.v21i1.8