Downloaded 184 times
Uploaded byislam jan buneri
Rodents.ppt
Rodents make up the largest order of mammals, comprising over 40% of mammalian species. They are found worldwide except Antarctica. Rodents have incisors for gnawing and lack canines, and their dentition allows them to eat a wide variety of foods like seeds, plants, and insects. They range greatly in size from the tiny African pygmy mouse to the large capybara. Rodents are important ecologically and have various uses for humans like fur, pets, disease vectors, and as food.
More Related Content
Rodents.ppt
- 1. Topic order rodentia Presentedby Islam jan buneri Ayesha ayaz yousafzai Ibrahim nakam Presented to Dear sir zahir ahmad saib lecture zoology department awkum (buner) Reference www.islam jan buneri.slideshare.com
- 2. Scientific classification Kingdom: Animalia Phylum:Chordata Class: Mammalia Superorder: Euarchontoglires (unranked): Glires Order: Rodentia Suborders Sciuromorpha Castorimorpha Myomorpha Anomaluromorpha Hystricomorpha
- 3. Introduction The mammalsof Rodentia are called rodents’ They are found in vast numbers on all continents other than Antarctica. Common rodents are mice, rats,squirrels, porcupines, beavers and guinea pigs, etc.
- 4. feeding Rodents usetheir sharp incisors to gnaw wood, break into food, and bite predators. Most rodents eat seeds or plants, cutting wood, Nearly all rodents feed on plants, seeds in particular, but a number of species eat insects .
- 5. Range of orders Rodents make up the largest order of mammals. With about 2,277 species of rodents, over 40% of mammalian species belong to the order. Their success is probably due to their small size, short breeding cycle, and ability to gnaw and eat a wide variety of foods. Rodents are found in vast numbers on all continents except Antarctica, most islands, and in all habitats except oceans. They are the only placental order.
- 6. Dentition All rodentshave a single pair of upper and a single pair of lower incisors, followed by a gap , and then one or more molars or premolars, Their anterior and lateral surfaces are covered with enamel, but the posterior surface is exposed dentine. Rodents lack canines, and have a gap between their incisors and premolars. Their incisors are highly versatile and can be used for a range of functions, such as cutting wood, biting through the skin of fruit, prey capture, or defense, depending on the species. Nearly all rodents feed on plants, seeds in particular, but a number of species eat insects .
- 7. Size Many rodentsare small. The tiny African pygmy mouse, (Mus minutoides), can be as small as 6 cm in length and 7 g in weight at maturity. The largest extant rodent, the capybara, (Hydrochoerus hydrochaeris),usually weighs up to 65 kg with exceptional specimens weighing up to 91 kg.
- 8. Use by humans Rodents are important in many ecosystems because they reproduce rapidly, and can function as food sources for predators. Mechanisms for seed dispersal. disease vectors. Humans use rodents as a source of fur. As pets. As model organisms in animal testing. For food