Needs for conservation for Fish variety of the River Choto Jamuna, Bangladesh
Keywords:
: Fish diversity, Choto Jamuna, biodiversity, Shannon-weaver diversity, Margalef’s richness, Pielou’s evenness, Bangladesh.Abstract
River Choto Jamuna is an important and well-known river in north-west Bangladesh in terms of fish
production and source of income for many fishermen living beside where this study has been
conducted from January to December, 2012. This study revealed the existing fish species and their
composition along with diversity, richness and evenness indices. A total of 63 species of fishes have
been recorded belonging to 41 genera, 23 families and 9 orders. Cypriniformes was recorded as the
most diversified fish group in terms of both number of species and individuals observed. Of all the
fishes found, 41.27% species were threatened in Bangladesh including 15.87% vulnerable, 15.87%
endangered and 9.52% critically endangered species. Overall values of diversity, richness and
evenness indices were found to be 3.717, 6.954 and 0.897, respectively. Finally, considering all the
findings, the establishment of fish sanctuaries to conserve available fish species, both threatened and
non-threatened, naturally is recommended.
