Fisheries eco-biology of beel Koshba in Naogaon District

Abstract

The physical conditions of Beel Koshba consisting of water temperature
(25.36±5.12°C/day), water depth (204.96±110.36cm/month) and water transparency (30.91±6.78
cm/day) were recorded. The chemical parameters of total hardness, alkalinity, pH, DO, CO₂ and
ammonia were 146.60±13.36 mg/l, 143.30±9.33 mg/l, 7.05±0.75, 6.03±1.08 mg/l, 8.64±0.88 mg/l
and 0.73±0.31 mg/l respectively. A total of 54 species of different vegetations 123 species of
phytoplankton and 73 species of zooplankton were recorded from the beel. A total of 104 species
of fish and Annelids (8), arthropods (12), molluscs (15), amphibian (8), reptiles (21), avis (40) and
mammals (12) were identified. Pesticidal toxic effluents contexts were also observed in the beel
ecosystem.

Key words: Fisheries; Eco-Biology; Beel Koshba

DOI: 10.3329/ujzru.v28i0.5283

Univ. j. zool. Rajshahi Univ. Vol. 28, 2010 pp. 33-39