Minggu, 24 Februari 2013



The Biggest Animals Kingdom and in The World | Pronghorn | Adult males are 1.3 to 1.5 meters (4.3 feet 4 feet 10 inches) long from nose to tail, standing 81-104 cm (32-41 inches) tall at the withers and weighs 40-65 kg (88 to 140 lbs.) Females have the same height, but males tracts 34 to 48 kg (75 to 110 lb). Each "horn" pronghorn consists of a thin flat bone grows laterally the frontal bone of the skull, forming a solid core. In contrast to the horns of the family Bovidae, the horn antelope branched channels, each envelope possesses nose of a tooth (hence the name Pronghorn). The horns of the males are well developed. Males a pair of horns leads into the upper part of the head, which consists of an outer sheath of hair-like substance which develops around a core of bone, the outer sleeve paid annually. The females are smaller horns, ranging from 2.5 to 15 cm (1-6 inches) (average of 12 cm (4.7 inches)) and sometimes barely visible, rarely straight and sharp. Males are distinguished by women than men have a small piece of black hair on the angle of the jaw. Pronghorns have a different smell musky. Males mark territory with scent glands located on the sides of the head. Unlike deer, Pronghorns have a gallbladder.

You can, however, support high speed cheetah. University of Idaho zoologist John Byers suggested that the Pronghorn its running ability to escape predators evolved vanished American cheetah, because it is much faster than existing predators in North America. The range extends from southern Saskatchewan and Alberta in Canada south through the United States (southwestern Minnesota and central Texas coast of southern California and northern Baja California Sur, Sonora and San Luis Potosi in northern Mexico. The subspecies known as the Sonoran antelope (Antilocapra sonoriensis U.S.) occurs in Arizona and Mexico. Other subspecies are Mexican pronghorn (A. a Mexican.), The Oregon pronghorn (A. a oregona.) And the danger Baja California Pronghorn (A. a peninsularis.). Pronghorns live primarily in grasslands, but also on site and deserts. In one study, 62% of the diet consists of grasses, shrubs, grasses, 23% and 15%, while in another, cactus accounted for 40%, 22% grass, 20% herbaceous, shrubs and 18%. An ongoing study of the Lava Lake Institute for Science and Conservation and Wildlife Conservation Society, shows a migration path which represents more than 160 miles. Pronghorn migration trip early Pioneer slopes Craters of the Moon National Monument, the Continental Divide.

Pronghorns form mixed groups in winter. In the spring, the flocks break into groups of unmarried women form their own groups and adult males live solitary lives. Females form dominance hierarchies with few circular relationships. Dominant females aggressively go other women to eat. Pronghorns adult males of two different reproductive strategies during the breeding season. Antelope male defends a territory that women can enter or defend a harem of females. An antelope can change mating strategies depending on environmental conditions or demographic. In areas with high rainfall, adult male pronghorn tend to be territorial and maintain their territory with scent-marking, sounds and hard intruders. In these systems, territorial males have access to the best resources for single men. Ignition" women behave as samplers until estrus and courageous men conflict. Females observed and then linked to the winners. "Quiet" females remain with a man in a remote area along zeal. A receptive female will stop and smell his scent gland and leaving the male to mount. Children 2-4 Berrendos kg, 3 kg more. Nursing women, married and bear their young for food and water and shelter from predators. Males are weaned 2-3 weeks for women.

In 1920, the hunting reduced the population of about 13,000 antelopes. Habitat protection and hunting restrictions have allowed the recovery of their number estimated population of between 500,000 and 1,000,000. Pronghorn migration corridors are threatened by fragmentation and blocking of traditional migration routes. In a study conducted by the migration Lava Lake Institute for Science and Conservation and Wildlife Conservation Society, at one point the migration corridor bottlenecks in an area only 200 meters wide. Mexican animals are listed in Annex I. Pronghorns have game in all states of the western United States, and permits are required to catch or shoot Pronghorns.
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