International Journal of Fauna and Biological Studies
2020, Vol. 7 Issue 4, Part B
Diversity and structure of Ardeidae population in the international wetland of South-East Benin (Ramsar site 1018)
Donald S Sossou and Jacques B Adjakpa
Ardeidae constitute one of most encountered bird groups in wetlands. But there are few data on the diversity and structure of their population in the South-East of Benin. In order to characterize their population, a monthly counting has been carried out between January 2015 and December 2016 on LN, SR, PL, OR and OL. Direct counting and fix station technics were applied. A total of 12 Ardeidae species distributed into 7 genuses were inventoried. The total bird number varied from 23026 to 40600 individuals between 2015 and 2016. The abundance of OR population was significantly (P
<0.05) upper than those in OL, PL, SR and lower than that of NL. The monthly specific richness varied between 10 and 12 over the two years. From 2015 to 2016, it varied between 12 and 11 species (NL), 11 and 12 species (PL and SR) and 8 and 7 species (OL). The Shannon-Weaver index and its equitability were 2.31 bits and 0.64 (2015) and 2.10 bits and 0.59 (2016). The highest in 2015 and 2016 were reached respectively in July (2.81 bits and 0.79) and August (2.68 bits and 0.75) with respective minima in November (1.52 bit and 0.42) and June (0.82 bit and 0.23). The diversity of OR is too low and lowly equal-distributed. On the contrary, it was low and meanly equal-distributed in LN, OL, SR and OL.
Pages: 80-88 | 412 Views 146 Downloads
Donald S Sossou and Jacques B Adjakpa. Diversity and structure of Ardeidae population in the international wetland of South-East Benin (Ramsar site 1018). Int. J. Fauna Biol. Stud. 2020;7(4):80-88.