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The reason is the gonads fully mature in winter, but they are in dormant phase due to the low temperature, thus the fish spawn only on the returning favorable conditions in spring. [12] The rise of temperature in streams from near freezing to 10–17 °C (50–63 °F) during May – June induces common snowtrout to spawn. [ 14 ]
Using the lowest BMR value measured in Arctic foxes, an average sized fox of 3.5 kg (7.7 lb) would need 471 kJ/day during the winter to survive. In Canada, Arctic foxes acquire from snow goose eggs at a rate of 2.7–7.3 eggs/h and store 80–97% of them. Scats provide evidence that they eat the eggs during the winter after caching.
Freshwater fish are fish species that spend some or all of their lives in bodies of fresh water such as rivers, lakes and inland wetlands, where the salinity is less than 1.05%. These environments differ from marine habitats in many ways, especially the difference in levels of osmolarity. To survive in fresh water, fish need a range of ...
Organisms at high altitude. An Alpine chough in flight at 3,901 m (12,799 ft) Organisms can live at high altitude, either on land, in water, or while flying. Decreased oxygen availability and decreased temperature make life at such altitudes challenging, though many species have been successfully adapted via considerable physiological changes.
The White Cloud Mountain minnow (Tanichthys albonubes) is a hardy species of freshwater fish and coldwater fish often kept in an aquarium. The species is a member of the carp family (family Cyprinidae) of the order Cypriniformes, [2] native to China. The White Cloud Mountain minnow is practically extinct in its native habitat, due to pollution ...
Hibernation. Hibernation is a state of minimal activity and metabolic depression undergone by some animal species. Hibernation is a seasonal heterothermy characterized by low body-temperature, slow breathing and heart-rate, and low metabolic rate. It is most commonly used to pass through winter months – called overwintering.
Mosquitofish. The western mosquitofish (Gambusia affinis) is a North American freshwater poeciliid fish, also known commonly, if ambiguously, as simply mosquitofish or by its generic name, Gambusia, or by the common name gambezi. Its sister species, the eastern mosquitofish (Gambusia holbrooki) is also referred to by these names.
Schizothorax plagiostomus is a species of ray-finned fish in the genus Schizothorax. Schizothorax plagiostomus locally known as khont, snow trout, snow carp, snow barbel and Swati fish[2] has an elongated sub cylindrical body with short, blunt and slightly prognathous upper jaw. Ventral surface of head and anterior part of body flattish, short ...