Seasonal changes in water flux, forage intake, and assimilated energy of free-ranging muskrats
Article Abstract:
The vegetation structure of marshes can be largely altered by the foraging and lodge building requirements of muskrats. While previous studies have attempted to estimate the forage intake of muskrats, they may not allow for diet composition, assimilated energy costs of free existence and variations in plant phenology. A new study in Manitoba uses biological water tracers to determine the water influx of animals and their intake of dry matter assimilated energy. The deuterated water technique shows that muskrats' daily consumption of fresh vegetation is between 750 g and 1,000g per kg of body mass.
Publication Name: The Journal of Wildlife Management
Subject: Zoology and wildlife conservation
ISSN: 0022-541X
Year: 1998
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Selenium accumulation and effects on reproduction in captive American kestrels fed selenomethionine
Article Abstract:
Selenium is known to have a detrimental effect on the reproduction of aquatic bird species, but its effects on other birds are not well understood. A new study investigates whether selenium effects the reproductive ability of captive American kestrels fed diets containing small amounts of selenomethionine. The study shows no differences in the reproductive parameters between captive and control birds and suggests that kestrels may be less sensitive to the effects of selenium than water birds. However, chronic exposure to selenium may be linked to reproductive effects.
Publication Name: The Journal of Wildlife Management
Subject: Zoology and wildlife conservation
ISSN: 0022-541X
Year: 1999
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- Abstracts: Central nervous system control of food intake and body weight. Hydrogen quick and clean
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