Both species were relatively easy to breed in captivity because they were social and adapted to harsh environmental conditions. The absolute age at sexual maturity ranges from less than 4 weeks in some rodents to some 15 years in the African bush elephant Loxodonta africana.
Herbivorous mammals may eat or trample crops and compete with livestock for food, and native carnivores sometimes prey on domestic herds. Territoriality That area covered by an individual in its general activity is frequently termed the home range.
The single greatest threat to these mammals is the continued destruction of their habitat; however, many species are also aggressively hunted.
The study of nonhuman primates monkeys and apes has opened broad new areas of research relevant to human welfare. Herbaceous mammals often serve as primary consumers in most ecosystems.
Natural history The hallmarks of the mammalian level of organization are advanced reproduction and parental care, behavioral flexibility, and endothermy the physiological maintenance of a relatively constant body temperature independent of that of the environment, allowing a high level of activity.
These large up to 10 metres, or 33 feet, longinoffensive marine mammals evidently lived only along the coasts and shallow bays of the Komandor Islands in the Bering Sea.
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For instance, around 25,—27, species of nematodes have been described, while published estimates of the total number of nematode species include 10,—20,; ,; 10 million; and million. When the body temperature nears the freezing point, spontaneous arousal occurs, although other kinds of stimuli generally elicit only a very slow response.
Within the social groupthe hierarchy may write an encyclopedia entry about a domestic animal images maintained through physical combat between individuals, but in many cases stereotyped patterns of behaviour evolve to displace actual combat, thereby conserving energy while maintaining the social structure see also animal behaviourterritorial behaviourand territoriality.
Mammals that breed only once a year are termed monestrous and exhibit a long anestrus; those that breed more than once a year are termed polyestrous. Litter size, moreover, may average four or more, and breeding may occur throughout the year in favourable localities.
The lodge has an under water entrance, and a pantry to store food for the winter. Australia provides a parallel case of early isolation and adaptive radiation of mammals specifically the monotremes and marsupialsalthough it differs in that Australia was not later connected to any other landmass.
Milk consists of fatprotein especially caseinand lactose milk sugaras well as vitamins and salts. Cite this article Pick a style below, and copy the text for your bibliography. Dormancy is the general term that relates to the reduced metabolic activity adopted by many organisms under conditions of environmental stress.
The primitive opposable anthropoid thumb is reduced as a specialization for this method of locomotion. Domestic goats were derived from the bezoar goat Capra aegagrusa hardy browser found in mountainous terrain. At first they were used for food, then as vehicles for travel.
Such groups may be reproductive or defensive, or they may serve both functions. Whereas Muslims, Hindus, and some Christians traditionally considered pigs taboo as a source of protein, the Chinese bred both pigs and dogs specifically for their meat. These creatures, and the protection, sustenance, clothing, and labor they supplied, were key factors that allowed our nomadic ancestors to form permanent settlements.
A majority of living microchiropterans are insectivorous, but members of two different families have become fish eaters. Horses Horses were domesticated in the third millennium B. Stress and dependence on humans causes hormonal imbalances and disrupts growth in different parts of the organism.
Early agriculturalists in the Fertile Crescent of the Near East began breeding goats first, then sheep, pigs, and cattle. African wildcat African wildcatAfrican wildcat Felis silvestris libyca. Dogs The first animal species to become domesticated was the dog Canis familiarusoccurring more than 12, years ago in west Asia.
Ranch-raised animals such as the minkfoxand chinchilla are also important to the fur industry, which directly and indirectly accounts for many millions of dollars in revenue each year in North America alone. The presence of terrestrial furbearers, particularly beavers and several species of mustelid carnivores e.
Such mechanisms result in more economical spacing of individuals over the available habitat. In mammals that exhibit winter dormancy such as bears, skunksand raccoonsarousal may be quite rapid. From tiny miniatures raised as pets to the silky cashmere goats whose coats are woven into luxurious textiles to nearly pound animals bred for meat, all in a rainbow of colors and patterns, the physical diversity of the domestic goat approaches that of the dog.
Ina major scandal erupted when a European processor mislabeled horse meat as beef, prompting many companies to recall products that contained it. From such a basal stock there has been a complex diversification radiation of trophic level adaptations.
Lineages of arthropods colonised land around the same time as land plantsprobably between — million years ago during the Late Cambrian or Early Ordovician. They provided a multitude of uses, including labor, milk, meat, bone, and tallow for burning.
Rhinoceros horn is used for concocting potions in eastern Asia; ivory from elephants and walruses is highly prized; and ambergrisa substance regurgitated by sperm whaleswas once widely used as a base for perfumes.Animal fibres such as wool are used to make textiles, while animal sinews have been used as lashings and bindings, and leather is widely used to make shoes and other items.
Animals have been hunted and farmed for their fur to make items such as coats and hats. Source for information on Domestic Animals: Animal Sciences dictionary. Skip to main content Search. Research categories A domestic animal is characterized by several attributes.
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Subscribe; Menu; Animal. This page gives a list of domestic animals, also including a list of animals which are or may be currently undergoing the process of domestication and animals that have an extensive relationship with humans beyond simple predation.
This Encyclopedia Britannica list features 6 domestic animals and their wild ancestors.
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