Environment and fish fauna of the Atrai River: global and local conservation perspective

Abstract

The fish fauna of the Atrai River were studied for a period of two years from January 2011 to December 2012. Sampling was carried out by several fishing nets and traps on fortnight basis. A total of 74 fish species belonging to 27 families and 52 genera were recorded. Cyprinidae was the most dominant family contributing 18 species in 9 genera. Two alien species were found- Hypophthalmichthys molitrix and Hypostomus plecostomus. Thirty locally threatened species (Vulnerable 13.51%, Endangered 18.92% and Critically Endangered 8.11%) were recorded. But, no globally threatened species was found. Relative abundance of majority 36.49% species was rare. Global population trend of 24.32% recorded fish species was Declining. The highest number of species (42) was recorded in the November 2011. Whereas, the lowest the number of fish species (12) recorded in June and August 2011. Very high correlation was found between fish species and physical environmental parameters (air temperature, water temperature, and water transparency). This study concluded that Atrai River could be an excellent place for natural conservation of fish species. Nevertheless, efforts to maintain a sustainable fishing pressure, removal of existing alien species and avoiding further introduction of such species are recommended.

Socio-economic status of fishermen of the Marjat Baor at Kaligonj in Jhenidah district, Bangladesh

“…This species is distributed throughout India, Pakistan, Bangladesh, Burma and Nepal (Chondar 1999) and com-mon in natural waters (e.g. Mohsin et al 2013;Chaki et al 2014;Galib et al 2009Galib et al -2018. Kalbasu was once dominant species in Indian waters till the 1980s but now it is considered a locally threatened species (Ramasamy and Rajangam 2016) and categorized as Vulnerable in West Bengal (Das et al 2006).…”

Livelihood of the fishermen in Monirampur Upazila of Jessore district, Bangladesh

“…(Rahman 1989). Kuchia is often distributed throughout the country, however, abundantly harvested in the Chattogram, Mymensingh, Kishorgonj, Tangail, Netrokona, Shylet, Sunamgonj, Naogaon, Bogura, Pabna, Khulna, Dinajpur and Barishal districts of Bangladesh (Imteazzaman and Galib 2013;Chaki et al 2014;Chakraborty 2018). The annual landing of M. cuchia depends on capture fishery since there is no culture system yet to operate for freshwater mud eel in Bangladesh.…”

Abundance study of fish species from Hel River of Kokrajhar, Assam, India

“…Based on the abundance of fish species, India is having one of the most diversified and the largest natural resources in the world (Vivekanandan 2013;Mohanty et al 2015). The information on the abundance and diversity of the fish species is the main obligatory for management policy (Chaki et al 2014;Galib 2015;Galib et al 2016). The diversity of any natural community partially depends on the conditions of the environment and unfortunately, interferences of anthropogenic activities are diminishing the living resources due to degradation of coastal habitats affecting the fish diversity (Chowdhury et al 2011).…”