October
Monday 22 February 2010 photo 1/2
![Frogs relate this genus Rana. It may also mean the family real frogs. Species occur in tropical and temperate regions throughout the world but mainly in Southeast Asia. Recent research is the genus paraphyletic and should therefore be decomposed into multiple taxa. European species are threatened primarily by the fact that their wetlands are filled again, or because of thoroughfares lying between their different reproductive areas and living areas
Adults of the genus are medium to large members of the regime tail-less amphibians. They have long hind limbs that allow them to perform long jumps. The skin is more smooth and moist than in toads. In addition, frogs are not large, lump-shaped parotidkörtlar behind his eyes as frogs. Pupils have an oval shape. Usually between the toes of the hind limbs well developed webbed.
That all tail-less amphibians lacks adult frogs tail; fry the other hand, tail bearing, but the tail gradually disappears as they develop into adults.
Frogs have no outer ears without eardrum flows directly to the skin and is clearly visible in most of the Rana species (unlike frogs, which have blurred eardrum). Hearing is good, and reminiscent of the extent of man. High frequency sounds (above 1000 hertz) is perceived directly through the eardrum, while the sounds of lower pitch reaches the inner ear through the bones. Unlike the tail bearing amphibians frogs have vocal cords, and they communicate frequently with each other to lure-call, warning cry, and other kinds of sounds. Males are usually at the bottom käkvinklarna hudpåsar that can be blown up. These are used to increase the song's resonance. [1]
As aquatic larvae (fry) eat the algae, plant parts and small animals, why they act as scavengers filtering. When they turned and started its landliv they eat worms, snails, spiders and other insects. They are also very popular prey for a variety of other organisms - in water, they are often food for larger insect larvae and are eaten in the country, for example, of various small mammals and birds. Amphibians way of life and reproduction have been adapted from a high mortality rate in the lower age groups. During the annual spawning season produce such a field one female frogs äggsamling with about 1 500 eggs. Of those surviving between five and ten until adulthood when they can actively participate in reproduction. The rest of the female reproductive effort of the year, the ecosystem to some in the form of food and nutrition. When frogs are born, they are born with gills. While the growing development of the lungs, which they use as adults.
In regions with temperate climate coincides with the spring spawning season, but in subtropical and tropical areas are no specific mating times. In some species living outside Europe may make the female up to 20 000 eggs (cf. Rom).](http://cdn07.dayviews.com/79/_u2/_u2/_u8/_u9/_u3/_u7/u2289375/57584_1266849535/Frogs_relate_this_genus_Rana_It_may_also_mean_the_family_real_frogs_Species_occur_in_tropical_and.jpg)
|
Frogs relate this genus Rana. It may also mean the family real frogs. Species occur in tropical and temperate regions throughout the world but mainly in Southeast Asia. Recent research is the genus paraphyletic and should therefore be decomposed into multiple taxa. European species are threatened primarily by the fact that their wetlands are filled again, or because of thoroughfares lying between their different reproductive areas and living areas
Adults of the genus are medium to large members of the regime tail-less amphibians. They have long hind limbs that allow them to perform long jumps. The skin is more smooth and moist than in toads. In addition, frogs are not large, lump-shaped parotidkörtlar behind his eyes as frogs. Pupils have an oval shape. Usually between the toes of the hind limbs well developed webbed.
That all tail-less amphibians lacks adult frogs tail; fry the other hand, tail bearing, but the tail gradually disappears as they develop into adults.
Frogs have no outer ears without eardrum flows directly to the skin and is clearly visible in most of the Rana species (unlike frogs, which have blurred eardrum). Hearing is good, and reminiscent of the extent of man. High frequency sounds (above 1000 hertz) is perceived directly through the eardrum, while the sounds of lower pitch reaches the inner ear through the bones. Unlike the tail bearing amphibians frogs have vocal cords, and they communicate frequently with each other to lure-call, warning cry, and other kinds of sounds. Males are usually at the bottom käkvinklarna hudpåsar that can be blown up. These are used to increase the song's resonance. [1]
As aquatic larvae (fry) eat the algae, plant parts and small animals, why they act as scavengers filtering. When they turned and started its landliv they eat worms, snails, spiders and other insects. They are also very popular prey for a variety of other organisms - in water, they are often food for larger insect larvae and are eaten in the country, for example, of various small mammals and birds. Amphibians way of life and reproduction have been adapted from a high mortality rate in the lower age groups. During the annual spawning season produce such a field one female frogs äggsamling with about 1 500 eggs. Of those surviving between five and ten until adulthood when they can actively participate in reproduction. The rest of the female reproductive effort of the year, the ecosystem to some in the form of food and nutrition. When frogs are born, they are born with gills. While the growing development of the lungs, which they use as adults.
In regions with temperate climate coincides with the spring spawning season, but in subtropical and tropical areas are no specific mating times. In some species living outside Europe may make the female up to 20 000 eggs (cf. Rom).
Adults of the genus are medium to large members of the regime tail-less amphibians. They have long hind limbs that allow them to perform long jumps. The skin is more smooth and moist than in toads. In addition, frogs are not large, lump-shaped parotidkörtlar behind his eyes as frogs. Pupils have an oval shape. Usually between the toes of the hind limbs well developed webbed.
That all tail-less amphibians lacks adult frogs tail; fry the other hand, tail bearing, but the tail gradually disappears as they develop into adults.
Frogs have no outer ears without eardrum flows directly to the skin and is clearly visible in most of the Rana species (unlike frogs, which have blurred eardrum). Hearing is good, and reminiscent of the extent of man. High frequency sounds (above 1000 hertz) is perceived directly through the eardrum, while the sounds of lower pitch reaches the inner ear through the bones. Unlike the tail bearing amphibians frogs have vocal cords, and they communicate frequently with each other to lure-call, warning cry, and other kinds of sounds. Males are usually at the bottom käkvinklarna hudpåsar that can be blown up. These are used to increase the song's resonance. [1]
As aquatic larvae (fry) eat the algae, plant parts and small animals, why they act as scavengers filtering. When they turned and started its landliv they eat worms, snails, spiders and other insects. They are also very popular prey for a variety of other organisms - in water, they are often food for larger insect larvae and are eaten in the country, for example, of various small mammals and birds. Amphibians way of life and reproduction have been adapted from a high mortality rate in the lower age groups. During the annual spawning season produce such a field one female frogs äggsamling with about 1 500 eggs. Of those surviving between five and ten until adulthood when they can actively participate in reproduction. The rest of the female reproductive effort of the year, the ecosystem to some in the form of food and nutrition. When frogs are born, they are born with gills. While the growing development of the lungs, which they use as adults.
In regions with temperate climate coincides with the spring spawning season, but in subtropical and tropical areas are no specific mating times. In some species living outside Europe may make the female up to 20 000 eggs (cf. Rom).
Visa toppen
Show footer