نتایج جستجو برای: coldwater fish culture
تعداد نتایج: 378521 فیلتر نتایج به سال:
The ecosystem of the Caspian Sea have been strikingly changed by human activities. This area has undergone significant ecological alterations and serious environmental degradation since the beginning of 1990s. The impact of fish cage culture on the zooplankton community was studied in the southwestern Caspian Sea, off Jafrud during January to April 2013. A total of 12 zooplankton belonging to 9...
Introduction Hamilton Harbour, also known as Burlington Bay, is a large embayment located at the western tip of Lake Ontario (Fig. 1). For decades, waste discharges from industrial andmunicipal activities had converted this scenic port into one of the most polluted sites in the Laurentian Great Lakes (Barica, 1989; Mayer and Johnson, 1994; Wolfe et al., 2000). As early as the 1850s, the Harbour...
Koi is one of the ornamental fish that lives in freshwater streams, lakes and lagoons. Geographical evolutionists believe that its origins from central Asia and Iran. The Koi Fish are benthivore. It was famous in the name of Magoi in the Old Persian Empire. The Japan and China have imported this fish from Persian Empire and started to cultivate them many years ago. The red and white koi fish ar...
The objective of this study was to compare growth performance and feed conversion ratios of rainbow trout (Oncorhynchus mykiss) and brook trout (Salvelinus fontinalis) juveniles in monoculture and duo-culture in freshwater and seawater under aquarium conditions. The fish were about 2-months old hatchery-reared brook and rainbow trout with initial weights of 0.934±0.033 (n=360) and 1.014±0.019 (...
The objective of this study was to compare growth performance and feed conversion ratios of rainbow trout (Oncorhynchus mykiss) and brook trout (Salvelinus fontinalis) juveniles in monoculture and duo-culture in freshwater and seawater under aquarium conditions. The fish were about 2-months old hatchery-reared brook and rainbow trout with initial weights of 0.934±0.033 (n=360) and 1.014±0.019 (...
—Stream fish are expected to be influenced by climate change as they are ectothermic animals living in lotic systems. Using fish presence–absence records in 1,110 stream sites across France, our study aimed at (1) modeling current and future distributions of 35 stream fish species, (2) using an ensemble forecasting approach (i.e., several general circulation models [GCM] × greenhouse gas emissi...
—The bull trout Salvelinus confluentus is believed to be among the most thermally sensitive species in coldwater habitats in western North America. We conducted a comprehensive field assessment of thermal habitat associations throughout the southern margin of the species’ range. We developed models of thermal habitat associations using two data sets representing a geographically diverse range o...
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