Hydropower reservoir reduces Great Argus Argusianus argus density in proximity to its shore

Summary Habitat degradation due to hydropower development within protected areas has a marked negative effect on resident wildlife species. However, efforts to develop appropriate conservation and management plans are hampered by a general lack of quantitative information and a poor understanding of relevant ecological constraints. Great Argus Argusianus argus, a large galliform species sensitive to habitat degradation, can reflect the impacts of the Chiew Larn reservoir in southern Thailand on local wildlife. Great Argus abundance in the remaining lowland areas of Khlong Saeng Wildlife Sanctuary (KSWS) was estimated using line transects along the Chiew Larn reservoir edges and in the forest interior between February and April 2017. The population estimate for KSWS was 108 individuals (95% CI: 41–272) based on the sampled area of 18.06 km2, with a density estimate of 5.9 calling males/km2. The abundance increased with increased distance from the reservoir shoreline, which might be related to the high level of direct and indirect human disturbance close to the hydropower reservoir.

Impact of the Covid-19 Pandemic on Activities Socio-Economic Floating Net Cages (FNC) Business in the Koto Panjang Hydropower Reservoir, Riau Province

The purpose of the study was to analyse the impact of social activities related to cultivation and outside the cultivation business as well as economic activities before and after covid-19. The method used in this research is a survey method. Data collection was carried out on 20 farmers, three fish seller, and two fish feed sellers. Data analysis was carried out quantitatively and qualitatively. The results showed that before the pandemic, 80% of FNC cultivators’ social activities were done face-to-face and after the pandemic, only 40% were face-to-face and the rest were through mobile phones. Social activities outside the FNC such as worship, marriage and other attendance frequency is reduced by 5% - 25% after the pandemic. The economic activity of aquaculture has decreased after the Covid-19 outbreak by 50% in 2020 and 37.5% in 2021. In 2021 cultivators have made a profit but it is lower than the profit before the covid-19 pandemic. The economic activity of aquaculture has decreased after the Covid-19 outbreak by 50% in 2020 and 37.5% in 2021. In 2021 cultivators have made a profit but it is lower than the profit before the covid-19 pandemic. The economic activity of aquaculture has decreased after the Covid-19 outbreak by 50% in 2020 and 37.5% in 2021. In 2021 cultivators have made a profit but it is lower than the profit before the covid-19 pandemic.