A systematic survey of Rapti River was conducted once in a month for a period of one year from August 2018 to July 2019 from ten collection sites of Shravasti and Balrampur districts. Its main aim was to find out ichthyofaunal diversity and their conservation status. The results of the present study revealed the occurrence of 46 species belonging to 30 genera 19 families and 9 orders. The family Cyprinidae were dominated by 13 species followed by Bagridae (6 species); Ophiocephalidae (...) (4 species); Siluridae (3 species); Schileidae, Clariidae, Gobiidae, Notopteridae and Mastacembeleidae each with two species; Saccobranchidae, Chacidae, Ophiocephalidae, Gobiidae, Anabantidae, Nandidae, Osphronemidae, Ambassidae, Clupeidae, Eugraulidae, Belonidae and Tetradontidae each with one species. The fishes in these areas are under threat due to anthropogenic activities such as overfishing and pollution hence authors strongly recommend practical conservation action plan to prevent the species from extinction. (shrink)

Coronavirus disease-19 (COVID-19), produced by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has become a global pandemic, giving rise to a serious health threat globally. The global Covid-19 pandemic is a setback for sustainable development and compromise the world commitment to the 2030 Agenda for Sustainable Development. The measures taken to control the spread of the virus and the slowdown of economic activities during lockdown have significant effects on the environment. Therefore, this review discuss the indirect positive and negative (...) impacts of Covid-19 pandemic towards sustainable environment. This study indicates that, the pandemic situation significantly improves air quality in different cities across the world, reduces the emission of greenhouse gases, and decreases water and noise pollution, which may help in the restoration of the ecosystem. In addition, there are also some negative impact of Covid-19, such as increase of medical waste, haphazard use and disposal of disinfectants, mask, and gloves; and burden of untreated wastes continuously endangering the environment. It points to the fact that the net effect has been positive; in terms of reduction in greenhouse emissions, oil exploration activities, and pollution. It is expected that the proper implementation of the proposed suggestion might be helpful for the global environmental sustainability. (shrink)

This paper deals with the acute toxicity of Sugar factory effluent on freshwater catfish, Mystus vittatus (Bloch), at different concentration and duration of exposure on the mortality and ethological alterations. The LC50 for 96 hours of sugar factory effluent for Mystus vittatus was 3.10% (v/v). The result also revealed that mortality rate depends upon concentrations of effluent and duration of exposure. The effluent exposed test fish showed alterations in behavioural responses. The behavioural alterations of Mystus vittatus during the present experiment (...) was found to depend on both duration of exposure and increase in concentration of the effluent and duration of exposure. The mortality rate was found to be directly proportional to the concentration of effluent. Thus, the present revealed that fish, Mystus vittatus are sensitive to distillery wastewater and can be used as biological indicators. (shrink)