Caribou calf mortality in Denali National Park, Alaska

Article Abstract:

A study has been conducted to determine the timing and extent of calf losses in the Denali Caribou Herd and to evaluate the factors which influence mortality. Thirty-nine percent of 266 calves died as neonates, with 85% of these deaths occurring within eight days of birth, and 98% of the deaths were due to predation. Grizzly bears, wolves and other large predators accounted for majority of these deaths. Neonatal mortality was higher during calving seasons that followed a severe winter, but was lower when calves were born during the peak of calving season.

Analysis, Caribou, Denali National Park and Preserve, Alaska

---

Density dependence, compensation, and environmental effects on elk calf mortality in Yellowstone National Park

Article Abstract:

A study designed to identify the influences affecting the survival of elk calves in Yellowstone National Park is presented. The study shows that the survival of the calves is directly related to the size of the population, both in summer and winter. A large elk population means that fewer elk calves survive. It is concluded that summer mortality of calves is partially due to predation, while winter mortality is caused by malnutrition. Seasonal mortality is partially compensatory in regulating the size of the elk herds.

Elk, Elk (Wapiti), Yellowstone National Park

---

Responses of desert bighorn sheep to increased human recreation

Article Abstract:

Research describing the behavioral response of bighorn sheep to human activity in Canyonlands National Park, Utah, is presented. It is shown that the greatest disturbance to the sheep occurs during spring lambing and autumn rut.

Wildlife management, Bighorn sheep, Canyonlands National Park, Utah

Similar abstracts:

• Abstracts: Status signalling, motivational condition and dominance: an experimental study in the great tit, Parus major L
• Abstracts: Does the mid-crust flow? Uplift, thermal unrest and magma intrusion at Yellowstone caldera. Pop-up disaster
• Abstracts: Fears rise over BSE infection in UK abattoirs. Chemistry prize reflects tailor-made reactions. Royal Society disputes value of carbon sinks
• Abstracts: Daisy gives an evolutionary answer. Competition for brain space. Australia's last giants
• Abstracts: Conical dislocations in crumpling. Non-equilibration of hydrostatic pressure in blebbing cells. Non-stick water

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.