Avinash Kumar & Arun Kumar*
University Department of Zoology, B.N. Mandal University, Madhepura, Bihar, India.
Received : 21st May, 2023 ; Revised : 24th June, 2023
DOI:-https://doi.org/10.5281/zenodo.13346334
Abstract– Benthic macro-invertebrates are small aquatic animals and larval stage of insects (Environmental protection agency- 2016) which are diverse faunal groups living in fresh water system. These fauna remain attached with logs, aquatic plants or stones or remain buried in bottom sediment. Diversity and distribution of benthic macro-invertebrate was studied in two ponds of Madhepura district. Pond-1 is known as Puraini pokhar situated in Godhi tola of Puraini block under Madhepura district and Pond-2 known as Baghmara pokhar situated 5 km away from district headquarter of Madhepura. In total, 23 species of benthic macro-invertebrates were recorded from two ponds out of which 19 species were recorded in Pond-1 and 13 species in Pond- 2 belonging to 5 groups- Oligochaeta, Hirudinea, Insecta, Pelecypoda and Gastropoda. Gastropoda was most dominant represented by 8 species in Pond-1 and 6 species in Pond-2 followed by Insecta in Pond-1 and Oligochaeta in Pond-2. Abundance of benthic fauna varies in between 1364 individual/m2 and 4413 individual/m2 in Pond-1 and in Pond-2, abundance of benthic fauna varied in between 1148 individual/m2 to 5154 individual/m2. Maximum abundance was recorded in the month of December in both ponds and minimum abundance in pond-1 was recorded in July and in pond-2 in the month of September. The abundance of benthic macro-invertebrate was higher in Pond-2 probably due to discharge of domestic sewage.
Key words: Benthic macro-invertebrates, Abundance, Diversity and distribution.
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