Abundance and species compositions of the fishes in blue Nile River, Ethiopia

Content Provider	Semantic Scholar
Author	Awoke, Tadlo Mingist, Minwyelet Getahun, Abebe
Copyright Year	2015
Abstract	In the present study we evaluate the relative abundance and species composition of fishes in Blue Nile River below the fall during the wet season (September-October, 2010) and dry season (March-April, 2011). Fish samples were collected by using monofilaments gillnets (5-55 mm) and multifilament gillnets, having mesh sizes of six, eight, ten, twelve and fourteen centimeter stretched bar mesh, having a length of twenty five meter and depth of one and half meter, on three sampling sites. Sefiana site had the higher diversity (average H'= 3.02). Labeobarbus intermedius was the most dominant (39.67% by number) followed by Labeo forskalii (27.77%) and M. kannume (11.67%). The other species, L. nedgia, B. docmak, L. crassibarbis, C. gariepinus and O. niloticus were found in 9.57%, 5.13%, 3.50%, 1.98% and 0.70%, respectively. All the fish species except L. crassibarbis, B. docmak and C. gariepinus were showed significant differences in abundance between seasons with overall catch composition of 39.67%, 27.77%, 9.57%, and 11.67% for L. intermedius, L. forskalii, L. nedgia and M. kannume, respectively. L. intermedius, L. forskalii, L. nedgia and M. kannume were the most important species in both seasons and in most of the sampling sites. The studied habitats are in danger being eroded and therefore catchment rehabilitation should be considered and the massive seasonal fishing by the local communities should be reduced.
Starting Page	334
Ending Page	339
Page Count	6
File Format	PDF HTM / HTML
Volume Number	2
Alternate Webpage(s)	http://www.fisheriesjournal.com/archives/2015/vol2issue6/PartE/2-6-29.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article