Animals Directory

Archive for the ‘Reproduction info’ Category

The same family as sharks, can grow to 8.4 meters in size and weigh about 1,400 kg, in some respects it is a great unknown to man. It was first seen by Dondorff in 1798.

Habitat

Seas inhabit temperate waters throughout the world where they feed on plankton, small fish and squid. Generally, like sharks, are opportunistic remoras attached to the bottom, looking for the scraps that remain of their feeding and also seek protection. In areas like the coasts of the Philippines, California and the Gulf of Mexico its population was decimated in the nineties by the lawlessness in the hunting spear. Its population is currently unknown and whether or not in danger of extinction, in any case is considered a vulnerable species in the areas mentioned above.

Reproduction

It is similar to some sharks. The male has a sperm transmitter organ similar to a pair of penises called claspers that develop along the inner pelvic, each has a duct through which sperm is transferred to the female, which produces the fertilization.

During courtship, one or more males pursue a female. In the end the winning male grasps a female’s wings between your teeth and presses his belly against her, bend one of his claspers and inserted into the opening of the female. Copulation lasts about three seconds.

To be ovoviviparous fertilized eggs remain inside the female, for a time unknown but is estimated to be between 9 and 12 months or more. They usually have one or two offspring but it is unknown when and where you stand, but the few records that exist in this regard indicate that they do in shallow water and the hatchlings are between 1.2 and 1.5 m at birth. Between pregnancies could take a year off to recharge. It is estimated that they can live 50 years or more.

It has also been found that the male tends to kill their opponents in part of courtship.

Immigration

Given the dispersed nature of their main food, plankton, it is likely to migrate, but where and when is something that is unknown and currently is studying setting some specimens with labels, or by sonic telemetry at different locations. As you can see, these marine animals are extremely impressive sight.

Unlike the horns of other species such as antelopes, the rhinoceros does not have a bony core, but are made of keratin, the same substance as hair and nails in other mammals. The two African species and the Sumatran rhino has two horns, while the Indian and Java have only one.

The rhinoceros family is characterized by its large size, being of the few mega fauna species considered to exist today, along with elephants and hippos, all species may exceed at least a ton of weight. All are herbivores, and their skin is thick and strong, between 1.5 and 5 cm thick, formed by layers of collagen.

Have relatively small brains for their body size (between 400 and 600 g). Although usually feed on leaves, their ability to ferment food in the colon allows them to survive by consuming more woody plant material such as roots and branches, if necessary. Unlike other species of Peristaltic, the African species of rhinoceros lack teeth at the front of the mouth, using a powerful chewing premolars and molars for crushing the food of vegetable origin.

Rhinos have a keen sense of smell and a sensitive ear, but very poor eyesight. Their maximum life expectancy is 60 years. The length of the head and body is 240 to 315 cm in the Sumatran rhinoceros and from 335 to 420 cm in the white rhinoceros. The peso, which is 800 kg in the Sumatran rhino can reach 3,600 kg in the white rhinoceros.

All species are Peristaltic, ie have a more developed middle finger on each leg, which serves as a mainstay, and two fingers under the sides. That gives your prints the characteristic appearance of an ace of clubs. In the case of white and Indian rhinoceros, adult males are much larger than females, but in other species, males and females have a similar size.

Rhinos have poor vision but are able to distinguish a person immobile up to about 30 m away. The eyes are set on both sides of his head. His ear is very thin, and the ears are tubular, moving rapidly in the direction whence the sound. But its most developed is the smell, the amount of olfactory tissue in the mouth than brain size.

All rhinos are herbivores and require a large amount of food daily to maintain its high volume. They can tolerate relatively high fiber foods in your diet, thanks to the ability of your colon to ferment and digest the woody plant tissue, but prefer more nutritious and soft parts when available.

Males reach reproductive capacity between seven and eight years old, but not usually breed until at least ten years. A peculiarity of rhinos is that the testes do not descend into the scrotum, and penis, when retracted, is directed backward. Females have two teats located between the two hind legs. Births occur at any time of year, but in the case of African rhino births occur in greater numbers between the end of the rainy season and mid-dry season.

Protect your body with a shell formed usually by bony and horny plates, made of calcium from the bone itself. The shell will go ahead, head and forelegs, tail and hind legs from behind. The spine is soldered to the back of the shell, this is one of the most important features of its skeleton. Breathing is through the action of the limbs as the nature of his ribcage is unable to breathe.

Turtles have no teeth, but his strong jaw sharp peak shape allow them to eat their food. One of the characteristics of turtles, which varies according to the species they belong to, is their longevity, and can reach up to 150 years.

There are land turtles habitat, aquatic, marine and freshwater. There are also lots of species with semi-aquatic habitats as part of the time spend on land and part in fresh water. The terrestrial habitat have separate fingers, while the aquatic habitats have fins transformed into limbs or fingers webbed.

Sea turtles can live 30 to 40 years after its kind. Sea turtles can achieve high-speed swimming in the sea. Sea turtles have a collar made of 8 vertebrae, so have limited mobility but they can retract the head.

The lungs of turtles are very similar to those of humans, can hold their breath for ten minutes. They have no external ears, but will have a very efficient procedure, the sense of hearing is very keen on them. The sense of smell is weak, the view is better on sea turtles, but have a highly developed sense of direction. Sexual maturity occurs between 6 and 8 years old, usually male to female waiting off shore to breed.

Scientific classification, so that species belonging to the same genus (group of closely related species) can be called kangaroo, wallabies or walaru, only depending on their size. For example, Macropus parma wallabies is known as the Parma, while Macropus antilopinus is known variously as walaru antelope antelope or kangaroo.

Macropodinae subfamily also includes species of kangaroos, and walarús walabís, other commonly known as tree kangaroos, Cuoco, and pademelones dorcopsis.

There are many so-called kangaroo species, and this is reflected three of them:

* The red kangaroo (Macropus rufus), which is the largest of the kangaroos and the largest of the marsupials still in existence. Red Kangaroos occupy the arid and semi-central arid Australia. An adult male can measure 1.5 m in height and weigh 85 kg.
* The eastern gray kangaroo (Macropus giganteus), less known than the red kangaroo, but most frequently sighted, as its range covers the fertile eastern area of ​​Australia.
* The western gray kangaroo (Macropus fuliginosus), of smaller size and found south of Western Australia, South Australia near the coast and the Darling River basin.

Kangaroos have large powerful hind legs, large feet designed to jump, long, muscular tail for balance and a small head. Kangaroos are herbivores, eating grass and roots. All species are nocturnal and crepuscular, usually spending the day quietly and feeding in the afternoons and cold nights, usually in groups. They have a life expectancy of 18 years ago.

Kangaroos are found mostly in Oceania. Popularly known as the kangaroo is the animal most representative of Australia.

Origin of name

The word kangaroo derives from gangurru, a word of Guugu Yimidhirr (an Australian Aboriginal language), referring to the gray kangaroo. The name was first written (in English kangaroo by Lieutenant (later Captain) James Cook) on August 4, 1770.

A widespread legend says that in fact the name kangaroo would come to ask the West the name of that animal and this be what the natives responded, and their meaning but would not be the name of the animal, but simply saying “do not understand their question

Reproduction

Reproduction is sexual and varies greatly with species. The red kangaroo is an opportunistic player, as they mate and reproduce when seasonal conditions are favorable for breeding of offspring. Grey Kangaroos breed all year round, but young calve in the summer months, as they leave the bag on the ideal time the spring. Other species have more restricted breeding season.

The courtship may last a few hours or extended 2 or 3 days. The male follows the female is in heat, often sniffing the urogenital opening of the bag and playing the female tail with his paw. The male makes wallabies characteristic sinuous lateral movements and with the tail, which produce clicks, the matching can be shorter or longer than one hour, as in the case of gray kangaroo.

In many species, such as Cuoco, mating takes place after birth (post partum estrus), but in these cases usually occur at rest a blastocyst, which develops later, when the previous birth rearing leave the pouch. The young are born between 28 and 36 days of mating. Remain in the bag about 8 months, but continue to nurse her back to about six months, at which time and another calf will be born. Young people often interact with their mothers until they reach sexual maturity.

The “yurumí” has a heavy coat whose color varies from black to white through various shades of gray and lasts a long tail, full of hair up to 40 inches long, which give an aspect of range or flag. ” This species has units that reach 2 meters long, 80 cm which correspond to the tail. The weight of an adult male can reach 40 kilos. its snout is long and narrow, has no teeth and his tongue is long. He is armed with two powerful claws burrowing in the front legs.

• Name

“Yurumí” is the name given in Guarani, but also calls it “tamanduáguazú”, “large anteater”, “anteater flag” (for its attractive tail). Its scientific name is “Myrmecophaga tridactyla (Linnaeus). Belongs to the class of mammals, order and family Vermilingua Myrmecophagidae. This species has, since 1977, a symbol of the Fundación Vida Silvestre Argentina.

• Habitat

From Venezuela and Guyana to some provinces in northern Argentina: the forest of Misiones, Formosa, Chaco and other areas impenetrable, east of Salta, Santiago del Estero northeast and probably north of Corrientes. In all these regions showing search areas covered or open savannah grasslands where there are termites or tacurús, fair-sized structures built by these invertebrates.

• Food

The diet of “yurumí is insectivorous, based mainly on ants and termites, which it extracts with its long sticky tongue. To achieve open gaps in the colonies of these insects, using the long, curved claws on its front legs.

• Their offspring

The gestation period of “yurumí” lasts about 190 days, after which it is born, usually in spring, a small farming weighs 1600 grams. The mother carries on her back for breeding from the first two or three weeks and for over a year.

• For what is at stake

There are three reasons that make us fear for the perpetuation of this species, altering their natural habitat, low reproductive potential and high vulnerability to man. As forests are cut down gradually to give refuge, secretly captures it for sale to zoos and private collectors.

The comical sea lion, sea lion hair, southern sea lion or sea lion South American sea lion is a species of mammal pinniped family of sea lions.

• Description

They are dark brown and black as adults when young. Adult males usually weigh about 300 kg, double that of females, and have a layer of reddish brown hair on the neck. This “hair” is the reason they are called “sea lions.” They live in colonies of about 15 individuals, formed by the male, his harem and a few young. During the summer, December and January, giving birth to move to protected sites where thousands of animals congregate. Gestation lasts about a year and each time a single calf is born. During the breeding season, males go into battle for control of their territory and females, and is usually not fed during this period. They live about 25 to 50 years.

• Habitat

Inhabits the South American coast, in the Atlantic and the Pacífico.Se is on the coast of South America, Ecuador, Peru, Chile, Argentina and Uruguay. It is found from southern Brazil to Tierra del Fuego in Argentina and from Bay Zorritos, Peru, to the southern tip of Chile respectively.

• Food

Their food is fish, octopus, squid, penguins and other seabirds, they eat between 15 and 25 kg of food per day and, in turn, are prey for orcas.

• Endangered

The human being the hunted for meat and oil, but the main reason to pursue was that the skin of newborn pups, called “poposa (English puppy) is used in fur.

• Customs

For most of the year, spend most of their time at sea have been found to sometimes sleep under the waves. When you come ashore, looking for rocks or islets alone and know to climb the highest points, rising to do so on the hind feet and rising with the help of the above to move from rock to rock. Usually when they want to return to the water, do not fall again, but into the sea at once, as they are excellent swimmers. When they walk on land, they do with the body raised on four limbs, clumsy movements, but fast enough. Their food consists entirely of fish, they know apprehend with rare skill. Normally eat between 15 and 25 kg. Of fish per day.

Mating systems can be considered as the expression of an animal’s reproductive behavior, and how through such an individual may optimize their reproductive success (having the maximum number of offspring possible).

The theory about how they are structured mating systems has greatly enriched in the last two decades of research in animal behavior. An interesting approach to understand these systems in pinnipeds (sea lions, seals and walruses) is to examine the relationship between sexual selection (see sidebar, “sexual selection” and ecological factors involved in determining these systems (topography, climate , oceanographic variables, availability of food, etc..).

We may often hear the Animals called raccoon, or even possibly become our pets at home. Raccoon (Procyon lotor) is a species of the weasel family and Olin coatis. This family is called Procyonidae and assigned to the Order Carnivora carnivores. These funds include the raccoon in carnivores, but this is only with regard to their relationship with other animals and names had been giving orders, not necessarily the eating habits of this species.

• Distribution:

Procyon lotor is Native American. distribution extends from Canada to Panama. He has been introduced in Europe and Asia.

• Habitat:

This species usually live in places where there are trees or shrubs near water or reservoir only. It is very common in coastal mangroves. Adapting to urban areas where water is available, including coastal areas.

• Habit:

Adults are stored in local action. Does not appear to defend this area from other members of the species, although it does not seem to recognize the constant companion. They gathered in a place where there is food and it is possible that in the nest through a few winters they were together.

• Reproduction:

Gestation period is 60-73 days. Usually occur three to four puppies in each shipment, but can be 1-7. Born with eyes closed, opening the third week of age. Young people are separated from the mother at the end of winter.

• Food:

Procyon lotor eat based on invertebrates, small mammals, fish, frogs, fruits and grains. They eat bird eggs and chicks and eggs crocodile and other reptiles. In the case of birds is one of the main reasons why you lose the whole colony. In urban areas far from home and in landfills.

• Description::

Raccoon measured in the head and body 42-60 cm. The tail has a length of 20 to 40 cm. Adult weight is 2 to 12 kg, in which men and women is greater than the weight increase as people live farther north. During the winter, in places where there are frozen, they remain in space out occasionally when the temperature rises, it is possible that during the long winter of an individual losing up to 50% by weight.