Indian Ministry of Environment and Forests

About: Indian Ministry of Environment and Forests is a government organization based out in New Delhi, India. It is known for research contribution in the topics: Population & Climate change. The organization has 3731 authors who have published 3782 publications receiving 85717 citations.

Evaluation of a Method to Count and Measure Live Salmonids in the Field with a Video Camera and Computer

Abstract: A prototype of a computerized video-camera system successfully counted and measured juvenile salmon in the field. Known numbers of smolts of coho salmon Oncorhynchus kisutch swimming through transparent acrylic tunnels were videotaped, and the videotapes were subsequently interpreted with a microcomputer. Unaided, the computer underestimated the number of fish because fish sometimes overlapped while swimming through the tunnels and were thus recorded as a single fish. However, revised estimates were accurate when portions of the tapes were viewed by an operator and expansion factors for computer-generated counts determined. When a mouse pointing device was used to obtain measurements from videotapes of individual fish swimming through the tunnels, these measurements were accurate. The software did not reliably produce accurate fish-length measurements when unassisted, again because of fish crowding and overlap in the tunnels. When a computer operator viewed the tapes and rejected those fish measu...

Can Previous Pro-Environmental Behaviours Influence Subsequent Environmental Behaviours? The Licensing Effect of Pro-Environmental Behaviours:

Abstract: Methods for promoting individuals’ pro-environmental behaviours are becoming very important. Besides traditional factors relevant to pro-environmental actions, few studies have examined the licensi...

Phytoplankton variation and its relationship with the environment in Xiangxi Bay in spring after damming of the Three-Gorges, China

Abstract: Following the completion of the Three-Gorges Dam, there was a strong spring phytoplankton bloom in Xiangxi Bay of Three-Gorges Reservoir. However, our knowledge of relationship between spring phytoplankton bloom and environmental factors was still limited. In this study, phytoplankton species composition, biomass, chlorophyll a concentration and environmental factors at two sampling sites in Xiangxi Bay were investigated during 25 March to 18 May 2007. The Xiangxi Bay was eutrophic with the lowest values of total nitrogen and total phosphorus being 0.80 and 0.07 mg/L, respectively. A total of 66 algal taxa belonging to seven phyla and 45 genera were identified. Peridiniopsis niei Liu was the most abundant species which preferred standing water. Canonical correspondence analysis and correlation analysis revealed that nitrate was significantly associated with phytoplankton growth. The phytoplankton chlorophyll a concentration was correlated significantly negatively with nitrate concentration, and nitrate concentration was very low during bloom periods. Heavy rainfall was the main reason of phytoplankton chlorophyll a concentration and biomass decreasing and blooms disappearing. In addition, heavy rainfall also brought more nitrate into the Bay which provided sufficient nitrogen source for blooms occurring again.