Species Composition Relative Abundance And Socio-economic Value Of Fishes In Ribb And Gumara River Eastern Lake Tana

This study was carried out in the eastern part of Lake Tana (Fogera Woreda) covering both postrainyrnand dry seasons, from October 2015 to April 2016, with the objective to identify and assessrnspecies composition, relative abundance, socio-economic and marketing system of fish andrnfisheries in that locality. Field sampling, personal observation, structured questionnaire andrninterview were employed. Shannon diversity index was used to compare species diversity in allrnsampling sites between seasons. Correlation analysis and paired T- test were used to test speciesrncomposition and abundance between seasons. Descriptive analysis and two ways ANOVA werernused to analyze the collected data. Generally eight fish species were identified and Cyprinidaernare the dominate one. Species composition of the fishes during the post- rainy and dry seasonsrnwas different. Mean Shannon diversity index showed highest H’ value (1.06) in dry than postrainyrn(1.04) season. The relative abundance score of species during the post-rainy and dryrnseasons was variable in all sampling sites and in dry season higher numbers of species werernrecorded (114). However, the most abundant species was Labeobarbus crassibarbus in weightrn(43.1) and Labeobarbus intermedius (46.7%) in number. Relation of fishing categories to boatrnand daily catch was analyzed by two way ANOVA and daily catch of fishers to the type of boatrnshowed a significant difference (P

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