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Nerpa - Description | A Wisdom Archive on Nerpa - Description | | Nerpa - Description A selection of articles related to Nerpa - Description | |
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Nerpa, Nerpa - Abundance and Trends, Nerpa - Bibliography, Nerpa - Description, Nerpa - Distribution, Nerpa - Foraging, Nerpa - Reproduction, Nerpa - Statistics
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ARTICLES RELATED TO Nerpa - Description | | | |  Nerpa - Description: Encyclopedia II - Nerpa - Abundance and TrendsThe Nerpa is currently listed as a “Lower risk” species on conservation lists (AFP, 2003; Seal Conservation Society) This means that while they are not currently threatened or endangered, it is possible and even likely that they will be in the near future. At last official count, the Russian government counted 104,000 Nerpas. That was in 1994. In 2000 Greenpeace did their own count and came up with somewhere from 55,000 to 65,000 seals. (Schofield, 2001) It is thought that excessive hunting, as well as poaching and pollution is quickly reducing the Nerpa population. (AFP ...
See also:Nerpa, Nerpa - Statistics, Nerpa - Description, Nerpa - Distribution, Nerpa - Abundance and Trends, Nerpa - Reproduction, Nerpa - Foraging, Nerpa - Bibliography Read more here: » Nerpa: Encyclopedia II - Nerpa - Abundance and Trends |
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| | | | Nerpa - Description: Encyclopedia II - Nerpa - Foraging The Nerpa’s main food source is Golomyanka, a type of bull head that lives only in Lake Baikal. Nerpas eat more than half of the annual produced biomass of Golomyanka, some 64,000 tons. (Pastukhov) They feed mainly at night, when the fish come within 100 meters of the surface. They feed with short, 10-20 minute dives, although this is hardly the extent of their abilities. (Harrold, 2002) Nerpas have two liters more blood than any other seal of their size and can stay underwater for up to 70 minutes if they are frightened or need to escape ...
See also:Nerpa, Nerpa - Statistics, Nerpa - Description, Nerpa - Distribution, Nerpa - Abundance and Trends, Nerpa - Reproduction, Nerpa - Foraging, Nerpa - Bibliography Read more here: » Nerpa: Encyclopedia II - Nerpa - Foraging |
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| | | | Nerpa - Description: Encyclopedia II - Nerpa - Reproduction Female Nerpas reach sexual maturity at 3-6 years of age, whereas male Nerpas reach it around 4-7 years. (Seal Conservation Society) The males and females are not sexually dimorphic. Nerpas mate in the water towards the end of the pupping season. With a combination of delayed implantation and a 9-month gestation period, the Nerpa’s overall pregnancy is around 11 months. Pregnant females are the only Nerpas to haul out during the winter. The male Nerpas tend to stay under the ice, in the water for all of winter. Nerpas usually give birth to ...
See also:Nerpa, Nerpa - Statistics, Nerpa - Description, Nerpa - Distribution, Nerpa - Abundance and Trends, Nerpa - Reproduction, Nerpa - Foraging, Nerpa - Bibliography Read more here: » Nerpa: Encyclopedia II - Nerpa - Reproduction |
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| | | | Nerpa - Description: Encyclopedia II - Nerpa - Distribution The Nerpa lives only in the waters of Lake Baikal, an inland sea on the edge of Siberia, that accounts for 20% of the world’s freshwater. It is 700 km long, 70 km wide, and more than 1.5 km deep at points. (Schofield, 2001; Harrold, 2002) It is also several hundred miles inland, so it is somewhat a mystery as to how the Nerpas came to live there in the first place. It can be speculated that they swam up rivers and streams or that possibly Lake Baikal was linked to the ocean at one point as the result of a large body of water formed in a pr ...
See also:Nerpa, Nerpa - Statistics, Nerpa - Description, Nerpa - Distribution, Nerpa - Abundance and Trends, Nerpa - Reproduction, Nerpa - Foraging, Nerpa - Bibliography Read more here: » Nerpa: Encyclopedia II - Nerpa - Distribution |
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