“…Therefore, the frequent accidental death of an animal of this endangered species aggravates the risk of extinction. Although the government declared the Halda river a permanent sanctuary, 38 fishermen are illegally catching fish, and thus, bycatch has become the most significant single cause of death in this river. Another threat is that they are killed intentionally for collecting their oil for bait fisheries and traditional medicine 11 .…”
A juvenile male Ganges River dolphin (Platanista gangetica spp. gangetica) was accidentally trapped in a seine net, rescued as dead and brought for postmortem examination to the Chittagong Veterinary and Animal Sciences University Hospital. This endemic species has suffered an expressive population reduction over the last few decades. Therefore, the necropsy aimed to reveal the factors for the dolphin's death. The study revealed a few bruises and scratches in the lateral thoracic region of the skin, including congestion of the lung and liver, both macro‐ and microscopically. Furthermore, we observed that the dolphin's stomach was empty, the intestines were filled with gas and there was a cyst on its wall. The authors concluded that the dolphin died of suffocation from underwater entrapment in the fishing net. These findings may be helpful for veterinarians and conservationists to make strategies to save this endangered species.
“…Therefore, the frequent accidental death of an animal of this endangered species aggravates the risk of extinction. Although the government declared the Halda river a permanent sanctuary, 38 fishermen are illegally catching fish, and thus, bycatch has become the most significant single cause of death in this river. Another threat is that they are killed intentionally for collecting their oil for bait fisheries and traditional medicine 11 .…”
A juvenile male Ganges River dolphin (Platanista gangetica spp. gangetica) was accidentally trapped in a seine net, rescued as dead and brought for postmortem examination to the Chittagong Veterinary and Animal Sciences University Hospital. This endemic species has suffered an expressive population reduction over the last few decades. Therefore, the necropsy aimed to reveal the factors for the dolphin's death. The study revealed a few bruises and scratches in the lateral thoracic region of the skin, including congestion of the lung and liver, both macro‐ and microscopically. Furthermore, we observed that the dolphin's stomach was empty, the intestines were filled with gas and there was a cyst on its wall. The authors concluded that the dolphin died of suffocation from underwater entrapment in the fishing net. These findings may be helpful for veterinarians and conservationists to make strategies to save this endangered species.
“…The river flows through Mymensingh, Netrakona, and Sunamganj districts and plays a vital role in the inland fisheries catch of Bangladesh as large quantities of fish are harvested yearly. The river comprises an average length of 26–28 km long course with an average depth 6.87 ± 0.33 m [ 14 ]. Fig.…”
“…ecological indicators. Equitability (evenness) was relatively high during the rainy season(Adesalu and Nwankwo, 2008;Chakraborty and Momi, 2022).Peet, …”
Fish biodiversity studies were undertaken from January 2012 to December 2012 to census commercially important fishes in the Sindphana Dam. The present paper deals with the variety and abundance of freshwater fishes in the Sindphana Dam near Shirur Kasar Dist. Beed [M.S] India. The results of the present investigation reveal the occurrence of 44 fish species belonging to 7 orders, 15 families, and 26 genera. Among the collected species order Cypriniformes was most dominant constituting 50% followed by order Siluriformes constituting 18%, order Perciformesconstituting 18 %, orders Osteoglossiformesand Synbranchiformes constituting 5% and orders Mugiliformesand Beloniformes constituting 2 %of the total fish species. Fish biodiversity indices species richness 44 in the total number of species (N0), 3.73 in Margalef’s index (R1), and 0.97 in the Menhinick index (R2). Species diversity was 0.47 in the Simpson index (), 1.16 in the Shannon-Weiner index (H’), 2.98 in abundant species (N1), and 2.80 in very abundant species (N2). Species evenness was 0.42 in (E1), 0.21 in (E2), 0.17 in (E3), 0.95 in (E4), and 0.97 in (E5).
Bangladesh J. Zool. 51(2): 155-164, 2023
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