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International Journal of Fisheries and Aquatic Studies
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E-ISSN: 2347-5129, P-ISSN: 2394-0506

International Journal of Fisheries and Aquatic Studies

2018, Vol. 6, Issue 4, Part G

Phytoplankton abundance and diversity of River Okpokwu, Benue State


Author(s): Adadu MO, PA Annune, RA Obande and JO Cheikyula

Abstract: Seasonal abundance and diversity of phytoplankton of River Okpokwu was determined at 3 locations of the River Okpokwu designated as Station A, (Known as Madam Ori side), Station B, (Known as Ogbe side) and Station C (Known as Igede side) all in Ado Local Government Area of Benue State. In dry season, a total of 9118 phytoplankton belonging to five families (Bacillariophyceae, Chlorophyceae, Cyanophyceae, Chrysophyceae and Euglenophyceae) was encountered; while family Bacillariophyceae had the highest percentage (52.92%) phytoplankton abundance, Chrysophyceae had the least (1.57%). While Shannon weinner index of 3.82, 4.37 and 4.34 were recorded for stations A, B and C, Margalef index of 4.04, 4.61 and 4.44 were recorded for stations A, B and C, respectively whereas in rainy season, a total number of 7617 phytoplankton belonging to five families; Bacillariophyceae, Chlorophyceae, Cyanophyceae, Chrysophyceae and family Euglenophyceae were also encountered. Of these families, while Bacillariophyceae (55.32%) had the highest percentage phytoplankton abundance, Chrysophyceae had 0.91% as the least abundance. While Shannon weinner index of 4.38, 4.56 and 4.43 were recorded for stations A, B and C, Margalef index of 4.34, 4.601 and 4.48 were recorded for stations A, B and C, respectively. In dry season, the month of December, 2015 was most abundant (8.63%) in phytoplankton richness while January, 2017 recorded the least phytoplankton abundance (8.15%) whereas in rainy season, the month of October, 2015 was most abundant (8.99%) in phytoplankton richness while January, 2015 recorded the least phytoplankton abundance (7.72%).

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How to cite this article:
Adadu MO, PA Annune, RA Obande, JO Cheikyula. Phytoplankton abundance and diversity of River Okpokwu, Benue State. Int J Fish Aquat Stud 2018;6(4):556-561.
International Journal of Fisheries and Aquatic Studies