Animals Directory

Posts Tagged ‘Reproduction’

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.

The body is elongated and covered with small scales, the first dorsal fin is shorter than the second, her only anal fin is elongated and notched and has a black line along its body. The back is black, gray or brown and belly is white or silver. Can reach up to 1.5 meters long and weights 15 kg live near the seabed on the continental shelf and the cliff, at varying depths between 30 and 500 meters deep, and even more. During the summer months, young specimens are close to the coast and in winter down to greater depths.

During the day they remain near the bottom and rises at night to catch food. His diet is based on plankton, encephalopathy, crustaceans and smaller fish. Have even the use of smaller copies of the same species because this species is reported to habits of cannibalism. Reproduction takes place between late winter and spring. Some hake live on both sides of the Atlantic Ocean and are characterized by filamentous pelvic fins, which are out of the throat and dragged through the water. Red hake is the American common species and is about 60 cm in length. This fish and white hake are prized for their oil and their swim bladders, which are used in the manufacture of gelatin called isinglass or fish glue.

The true hakes living on both sides of the Atlantic, the Mediterranean and the Pacific, off the coast of the United States, Mexico, Chile and New Zeal land. The common European hake is slender; reaching 1.2 m long, with long, pointed snout and their meat is delicious. Silver hake lives between Cape Cod, Massachusetts (USA) and Cape Sable, Nova Scotland, Canada. One species of Pacific fisheries, both in its larval form, as in their adult form, on the coast of Baja California (Mexico) and California (USA). Another species of great economic importance is that intense catch in Chile, where it caught flame.

Of the Gran Sol fishery south of Ireland, whose name has nothing to do with the sun king, but it is the phonetic transcription of the French ‘Grand Sole’, meaning ‘big language’. Gran Sol hake, mainly discharged at auction Boreal La Coruna and is what might be called hake ‘chilled’, as it travels surrounded by ice.

Certainly the EU policy on hake, its restrictive quotas, do that, but let them know you like me so stunned when I heard about eighty percent of the catch returned to the sea … dead. It’s called ‘discard’ board, which is imposed for economic reasons or, as we say, of legislation.

The octopuses are an order of cephalopod mollusks commonly known as octopus. Lack of shell and have eight arms. Are marine animals and carnivores.

Phylogeny

It is considered that the proper first appeared about 30 million years, differing from the squid in Antarctic waters, then, when he stressed the cooling of the Antarctic area was a dispersion of the first species in all oceans of the Earth .

Anatomy

The eight arms of the octopus have suckers sticky and converge on the animal’s body, in their point of convergence have the mouth fitted with a horny beak. In the head houses the eyes, well developed, the brains and three hearts, two of them pump blood to both gills and the third to the body. In the mantle are located the other viscera, as the ink tank they use to escape predators, also have soda, which can change direction, unlike the squid, with expelling a lot of water, thus promoting a high speed.

Each of its arms is connected with a small brain depends on the principal and uses them to control their arms.

The smaller octopus, as the blue-ringed octopus who lives in Australia, reaching about 15 cm length. The common octopus Octopus vulgaris can reach 3 m in length and 12 kg in weight. The largest species reach 6 meters and 70 kg, as Haliphron atlanticus and Enteroctopus dofleini.

Reproduction

The third right arm is actually a male copulatory organ called hectocotylus, which is inserted into the cloaca of the female to enter the spermatophores. After fertilization, the male leaves the female and she hangs her eggs (up 40,000) in clusters on the roof of his cave.

The female guards her eggs until they hatch, about a month, during which time the female wards off predators and oxygenates the cave, do not feed during this period and after hatching starving

Intelligence

Octopuses are considered more intelligent invertebrates, tending such a highly developed nervous system (2 / 3 is located in the brain and the rest is in the arms). Their ability to solve problems, overcome obstacles and memorize patterns has been tested several times by scientists around the world. They can learn by observing, which is more than clear after seeing mimic octopus in action, who takes on different forms of poisonous animals not to be disturbed. A great feature is that all knowledge (of survival) were acquired for themselves, as their parents die after the eggs hatch, in contrast to vertebrates where knowledge is transmitted from generation to generation.

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.