Seasonal Abundance Of Freshwater Prawns Atya Gabonensis Giebel, 1875 And Macrobrachium Felicinum, Holthuis, 1949 In The Lower River Benue, Makurdi, Nigeria

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C. Obetta, S G. Solomon , R.A. Obande,2 J.O. Cheikyula

Agricultural Research Council of Nigeria, P.M.B 5026, Wuse Abuja, Nigeria

Samples of A.gabonensis were hand-picked under rocks and crevices by the aide of fishermen. M.felicinum were collected with non-return valves trap,from November 2013 to October 2014. Specimens were transported to the laboratory in icebox. A total of one thousand one hundred and thirty two (1,132) samples of both species were collected.A.gabonensisconstituted 91.08% while Mfelicinumconstituted 8.92% of the total catch.A.gabonensiswas in high abundance during the late dry season, March and April,with the catch of14.64% and 12.54% of the total catch respectively.M. felicinum was in high number at the pick of rainy season with the most catch in July ( 5.57%)and August ( 3%). A.gabonensishad higher number of male than female except in February when the sex ratio was 1:1. M. felicinum had sex ratio of 1:3 M:F in both July and August.Water quality parameters were within tolerable ranges for prawn.It was concluded that A.gabonensis is in abundance in the Lower River Benue during the dry season and could be exploited for local consumption and export. M.felicinum is seasonal and can be harvested, with the seeds in July and August. This makes the species good for aquaculture.

 

Key words: Freshwater prawns, Seasonal abundance, Atyagabonensis, Macrobrachiumfelicinum

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