The ten-year cycles of the populations of the snowshoe hare and Canada lynx were first recorded from fur returns of Hudson's Bay Company traders in the late 1800s. The cycles revolve around the lynx's preference for hares over other animals as a food source. This predator-prey relationship is again being studied by the Northwest Territories Department of Renewable Resources, in an area known as the Mackenzie Bison Sanctuary. 1991 1992 N = 19 100 100 km N = 3 100 km 100 km Legend:a=I Lynx 1c. The density of the snowshoe hare in the study area was about 800/km2 in 1990 and about 100/km2 in 1991. Identify one possible cause for the change in the lynx population density during the 1991 to 1992 time period. d. After the decline in the hare population, younger male lynx were found to have migrated as far as 500 km from the study area. Explain how the gene pool of the neighbouring lynx populations would be affected. le. Lynx have lustrous, long hair. Currently lynx fur is out of fashion in the clothing industry, an a pelt sells for $60.00. In 1987, when long-haired fur was in high demand, a single lynx pelt sold for $1100.00. When lynx fur is out of fashion, predict the change in environmental resistance on the hare population and the corresponding effect on hare population growth.

Name Penguin Unit Final Assessment - Part II (Mod) Part II: Human Impacts There are many threats to the golden lion tamarin (GLT) population. These threats include logging, urbanization and increased agriculture as well as mining and land development. Only about 7% of the former Atlantic Forest remains, and where it does exist, it is highly fragmented and subject to fuelwood harvesting and illegal logging. In 1969, the number of golden lion tamarin individuals in the Atlantic Forest was found to have dropped to a low of 150 individuals. The species was listed as endangered by the IUCN in 1982, and by 1984, the National Zoological Park in Washington, D.C. and the World Wide Fund for Nature began a reintroduction program with 140 zoos cooperating worldwide. Despite the success of the project, the IUCN classification rose to Critically Endangered in 1996. By 2003, the successful establishment of a new population at Uniao Biological Reserve enabled downgrading the species to endangered,…

The ten-year cycles of the populations of the snowshoe hare and Canada lynx were first recorded from fur returns of Hudson's Bay Company traders in the late 1800s. The cycles revolve around the lynx's preference for hares over other animals as a food source. This predator-prey relationship is again being studied by the Northwest Territories Department of Renewable Resources, in an area known as the Mackenzie Bison Sanctuary. 1991 1992 N = 19 100 kam 100 km N = 3 100 km 100 km Legend:a=I Lynx 1a. Calculate the density of the lynx population in 1991 and 1992. Show your work. 1b. Calculate the per capita growth rate for the lynx population from 1991 to 1992. Show your work.

One argument for hunting and fishing is to limit wildlife populations to near 1/2 K.  WHY is this so?  What factors might complicate this argument?