TY - JOUR
T1 - Effect of Ganges River Morphological Dynamics and Farakka Barrage on Upward Migration and Catch of Indian Shad (Tenualosa Ilisha) In Bangladesh
AU - Faruque, Hasan
AU - Ahsan, Dewan
AU - Sarker, HM
AU - Gladun, Elena
PY - 2016/12
Y1 - 2016/12
N2 - becoming a threatened species due to human intervention and climatic factors. This studyis aimed to assess the impact of the Farakka barrage and the Ganges River morphologicaldynamics on the Indian shad migration and catch in Bangladesh. Results have indicatedthat the average water level of the river Ganges during the breeding season of Hilsa hasTenualosa ilisha, the largest and single most valuable fishery, considered as the flag-shipspecies of Bangladesh, also commonly known as Indian Shad in South-East-Asia, is nowsignificantly decreased over time. This situation is even worse in some particular pointslike Satbaria of the Pabna district, Dadpur and Kalyanpur of the Kushtia district, Ruppurand Samadia of the Rajshahi district, where the water level (6.5-8 m) is much lower thanthe threshold (10 m). The findings of the study have also revealed that the Ganges River isvery much dynamic because of the changes in width of the river, and the shifting of riverbends is quite frequent over the period of time and is more diverse in the upstream regionthan downstream. The decreased water level and the frequent shifting of the river bendsmight force the Hilsa fish to restrict their migration towards the upper Ganges. As a result,CPUE (catch per unit effort) of Hilsa in the Ganges River has significantly decreased (about50 kg boat-1 day-1 in 1960s to about 1.0 kg boat-1 day-1 in 2012), and in some areas thereis almost zero catch.
AB - becoming a threatened species due to human intervention and climatic factors. This studyis aimed to assess the impact of the Farakka barrage and the Ganges River morphologicaldynamics on the Indian shad migration and catch in Bangladesh. Results have indicatedthat the average water level of the river Ganges during the breeding season of Hilsa hasTenualosa ilisha, the largest and single most valuable fishery, considered as the flag-shipspecies of Bangladesh, also commonly known as Indian Shad in South-East-Asia, is nowsignificantly decreased over time. This situation is even worse in some particular pointslike Satbaria of the Pabna district, Dadpur and Kalyanpur of the Kushtia district, Ruppurand Samadia of the Rajshahi district, where the water level (6.5-8 m) is much lower thanthe threshold (10 m). The findings of the study have also revealed that the Ganges River isvery much dynamic because of the changes in width of the river, and the shifting of riverbends is quite frequent over the period of time and is more diverse in the upstream regionthan downstream. The decreased water level and the frequent shifting of the river bendsmight force the Hilsa fish to restrict their migration towards the upper Ganges. As a result,CPUE (catch per unit effort) of Hilsa in the Ganges River has significantly decreased (about50 kg boat-1 day-1 in 1960s to about 1.0 kg boat-1 day-1 in 2012), and in some areas thereis almost zero catch.
U2 - 10.21684/2411-7927-2016-2-3-34-58
DO - 10.21684/2411-7927-2016-2-3-34-58
M3 - Journal article
VL - 02
SP - 34
EP - 58
JO - Natural Resource Use and Ecology
JF - Natural Resource Use and Ecology
IS - 02
ER -