海豹ppt.ppt

1、why the seal was endangered,seal of high economic value, succulent and delicious, and possessed a wealth of nutrition; the local indigenous peoples favorite foods; leather tough, can be used to make clothes, shoes, hats, etc. to withstand the cold; fat can be used to extract the oil industry ; gut s

2、trings is to produce the finest materials; liver rich in vitamins, supplements are high value; teeth can produce exquisite handicrafts. Because of this, the seal was a serious hunting. Especially the United States, Britain, Norway, Canada and other countries to send every year many well-equipped fis

3、hing boat at sea seal catch big prey, many seals, especially the number of harp seals and hooded seals decrease was particularly high.,僧海豹（monk seal ）,At night, monk seals are busy foraging in shallow water, feeding lobsters, eels, octopus and fish in the reef edge hovering.During the day, due to th

4、e nocturnal cause fatigue, monk seals are often sitting on the beach, which can easily become prey to hunters.,Monk seals have been seen everywhere on the beach of the Black Sea, the Adriatic Sea, the Mediterranean, the Atlantic and the Caribbean, and even in the Hawaiian Islands, Senegal and could

5、see them. The case of a total of monk seals, Mediterranean monk seal, the Hawaiian monk seal, the Caribbean monk seal (West Indian monk seal) four kinds of species Status: highly endangered species. Where the Caribbean monk seal (West Indian monk seal) have become extinct in 1952.,斑海豹（Phoca largha ）

6、,Spotted seals alias seals, harbor seals, seals belong, scientific name Phocalargha. Spotted seals Cuyuan fusiform body, weighing 20 to 30 kg. Body was short-haired, blue-gray back, abdomen cream with blue-black spots. Head nearly round, large round eyes. No external ear. Snout short and wide, stiff

7、 upper lip and long tentacles, was beaded. Both limbs with five toes, webbed toes, forming a fin-like, with sharp claws; after big flippers, extends back, tail short and flat.,Although all the seals are carnivores, in fact, only harbor seals prey on penguins, but only two percent of their food.Spott

8、ed seals are widely distributed, mainly in the high latitudes of the northern hemisphere, in our country are mainly distributed in the Bohai Sea and the Yellow Sea. The main predator fish, but also eat cephalopods and crustaceans.,罗斯海豹（Ross seal ）,。,Ross seals is the minimum number of Antarctic Seal

9、s in kind. Very thick neck, neck skin folds can form a large contraction, the head can be indented to go, almost completely hidden in the folds of the neck, it can emit sounds like a bird. Its mainly distributed in the surrounding Antarctica ice with nearby,带纹海豹属（Histriophoca Gill ）,Seal also is the kind of small species of seals. Male is dark purple or dark blue and gray red purple gray, there is a very wide around the neck of the vaginal ring. Females pale body, dark gray-brown or dark brown gray base. Bands seals on the island only habitat in the northern hemisphere, mainl