Vol. 1, Issue 7 (2016)
Preliminary study on the diversity of Insects species in Nnamdi Azikiwe university stream
Author(s): Ebenebe CI, Ihuoma JN, Ononye BU, Ufele AN
Abstract: The study was conducted to assess the insect communities of a stream in Nnamdi Azikiwe University, Awka (Unizik stream) using the indices of species diversity and abundance of aquatic insects. Sampling of the aquatic insects was conducted weekly from May through June 2013. Shannon-Weiner diversity index, Margalef index, Shannon’s equitability index, Simpson’s dominance index and Menhinick diversity index were used to assess species richness and diversity. A total of 177 individuals were recorded which comprise of 7 orders and 12 families; dominated by order Diptera (40.1%) and Hemiptera (22%). The results from the study showed that percentage composition was highest at station 1(49.7%) followed by station 3(31.1%) while lowest at station 2(19.2%). Shannon wiener diversity index shows that the stream has a relatively diverse and well distributed aquatic insect community.