Snake Canadian

A sequence of reptilian studies tracked down the likely signal for mating in Canadian Red-sided Garter snakes. Males respond to products on the female s skin surface, which turn out to be related both to insect cuticular lipids and to those of mammalian skin. These integumentary... 

Mammals are often overlooked for their pest-control abilities. For example, in Canadian forests, shrews control larch sawflies and other pests. Lizards and toads are important natural enemies of pest insects, and snakes can help control problems with mice and voles. In many communities in Europe and North America, farmers encourage birds to control pests by placing nesting boxes around their fields. Even domesticated animals can assist in pest control. If you have a small orchard and keep chickens, let the chickens feed in the orchard. They will peck pests such as plum curculios out of dropped fruit and other ground litter. 

Crews, D., 1983, Control of male sexual behavior in the Canadian redsided garter snake, "Hormones and Behavior in Higher Verte-... 

Friedman, D. W., and Crews, D., 1985a, Role of the anterior hypothala-mus-preoptic area in the regulation of courtship behavior in the male Canadian red-sided garter snake (Thamnophis sirtalis parietalis) Intracranial implantation experiments, Horm. Behav.,... 

In 2002 results were published obtained from the examination of marine mammals, birds, fish, snakes and amphibians (liver, egg yolks, muscle and blood plasma) from all over the globe, including areas of the North and South Poles. PFOS was found in 77% of samples of marine mammals, in 60% of samples of birds, in 38% of fish samples and in 100% of samples of minks and otters. The concentration of PFOS in the liver of seals from the Baltic Sea was 240p,g/kg, in the liver of Canadian polar bears 3100p,g/kg and 1200 p-g/kg in the liver of North American minks. Samples fi"om industrial areas, however, contained several times higher amounts of PFOS compared with samples from the Polar Regions. Table 12.55 presents the concentrations of PFOS and PFOA in fish, crustaceans and molluscs. 

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