ponedjeljak, 7. prosinca 2015.

VIDRA ( OTTER Well enable them longer and better life-deserve to these beauties).

Lutra Lutra
(Linnaeus,
1758)
Otter,
Eurasian
otter
Red: Beast
(Carnivora)
Family: Kuna
(Mustelidae)
Subfamily: Otters
(Lutrinae)

 Description Types:
Otter is semi-aquatic or semiaquatic animal of the weasel family (lat. Mustelidae) which is recognized by its long slender body, short legs and a long,
uniformly tapered tail. The total body length in males, weighing about 10kg is 100 to 135 cm, of which the tail of waste 40 to 50 cm. females areon average, fewer and their total body length of 90 to 125 cm, while,a tail length of 35 to 45 cm and weighs about 7 kg.

Fur that covers the body is brown to dark brown, with a lighter ventral side which is to grayish white. Some individuals may differ in a brighter area in a spot located at the throat. At the head stands out broad snout and ears are poorly developed. All four paws between the five fingers have a floating cuticles.


In an elegant swimming otter leaves behind a wave of U-shaped, and protrude out of the water her only the eyes and nose. When the dive under water, the air bubbles leaves the chain on the surface. Otter fur is smooth when immersed in water and beyond
Water dries quickly, with hair sticking together giving thorny appearance.


  
Nutrition
The diet dominated by fish otters, and the other two groups of prey that have a significant proportion of the diet (> 33%) are crustaceans and amphibians (mostly frogs). Otter normally feed any type of fish in proportion to its abundance and there is no evidence that avoids any kind. Crab feed the otters in the summer, and frogs are usually in the winter and spring period. Otter will occasionally hunt and other vertebrates (water birds and rodents) and invertebrates if available.

Biology:
 Otter is mainly active at night and during the day lying in his den underground (eng. Holt) or in a shelter above ground (eng. Hover, couch). Some otters use a considerable number of places to rest and often lie to a lot of open spaces. Most of the places with the roots of trees, rough bearings in cane or reeds and the like, provided that the distance from the water up to 10 m (sometimes up to 50 m). 
 From the senses, the otter has a well-developed sense of sight, hearing and smell. In low-light underwater relies on the sense of touch by using whiskers (vibrissae) and the vision is of minor significance. Since they rarely vote his piercing whistle, short chirring and growl and sizzling, communication takes place between otters using scents. Faeces characteristic odor otters mark their territory by leaving it in prominent places such as large rocks, tree trunks on the coast, the mouth of tributaries and canals into the main river or under bridges.

 The most common
locations leaving droppings (eng. sprainting site): the otter tracks, near home and at points of entry and exit from the water. In addition to feces, can be found and gelatin secretions (jellies). Size of territory varies depending on the physical characteristics of water and the availability of food.

 Otters are solitary animals that usually meet with individuals of the other sex only in the breeding season. Females carry their young for two months and they can give birth at any time of year. (The exception is the Shetland Islands where the litter of young occurs in the summer.) His young otters spawn of the natal dens. These dens are not like those used to raise young people and among them are not visible accumulations of feces at other lair. They're hard to find and because they are often considerably distant from the water, with a discreet entrance is little evidence of the presence of otters. Female alone without male raises 2, 3 and less young who are blind the first 35 days.


 The young enter the water for the first time when they have about 3 months, and breast milk to feed her 4 months, after which they learn to hunt alone. With about a year young otters become independent and go in search of their own territory. Some of them do not travel far, but stay close to the territory of the mother,
while others can move more than 150 kilometers in a period of two months.


 Adult otters swim speed of 1.5-2 km per hour and at 7 to 8 hours per night hunting, but may exceed a total of 3 to 10 km. Normally they dive time 10-40 seconds, and the maximum recorded diving depth of 15 m.
In captivity (zoo) otters can live from 11 to 16 years, while in the wild live much shorter, usually 3 to 4 years on locations.

And to provide them with a longer and better life-deserve to these beauties.