Amazing Fishes | Operation Animal Rescue | Fish

Amazing Fishes | Operation Animal Rescue | Fish

We have seen all the fish. They are very elegant in their colouration and many people like to keep them as pets. A fish can be used as aquatic vertebrate animal whose body may or may not shed covered and has two sets of paired fins are identified and many unpaired fins. Fish are ectothermic or cold animal blood, which means that the body temperature continues to change with the temperature of the water. Fish are in all aquatic habitats, the spread of mountain streams to the deepest oceans. About 32,500 species are known, and together the wide variety of organisms compared to other vertebrate classes. Fish are also caught by the keepers and fish are kept in tanks as a source of decoration. They are also associated with films, cultures and religions.

The term refers to an animal that no craniate tetrapods that has gills throughout life and has fins instead of limbs will not suggest fishing. Like other bony fishes are of different types and are classified according to their characters. To find the most important types of fish in the modern world are the Inger, sharks, rays, lampreys, ray-finned fishes, coelacanths, and lungfish. A fish they streamlined body to have to quickly swim in waters have to get gills and Atemhilfsorganeórgãos to oxygen and paired and unpaired fins. The paired fins are the pectoral and ventral fins. The unpaired fins are the dorsal, anal and caudal fins. In general, the body of the fish is covered with scales, but there are also some fish that are missing scales and are less scale. The jaws are very well developed in fish. They are oviparous.

Usually fish are cold-blooded vertebrates, but there are always exceptions. Tuna, swordfish, and some species of sharks have adaptations in relation to the category of hot blood. Rationalization and efficiency of swimming fish also varied as tuna, salmon, and jacks can swim 20/10 body lengths per second, while eels and sharks can not move more than 0.5 body-lengths per second. Some species have the ability to transport oxygen directly from the air, as well as other substances to extract as they support some specialized structures for this purpose, for example lungfish paired lungs, gouramis have labyrinth and catfish extract oxygen through the intestine or stomach. The body shape and the arrangement of the ribs is also variable. The scales are of different types, such as placoid, cosmoid, ganoid, cycloid, and ctenoid. There are also certain types of fish that live on the earth, such as mudskippers live in Watts and disturbed in their underground caves hide.

The size of the body of the fish is so small as fish, robust baby is only 8 mm long, about as large as a white shark that is 16 meters long. Many animals are often confused as fish associated with them such as starfish, jellyfish, squid, mussels with the term fish. Strictly speaking, are not fish. There are currently 28,000 existing fish, of which 27,000 are bony fish, are 970 sharks, rays, and chimeras and 108 are the hagfish.

About 64 families are monotypic fish as they contain only one species. The total amount of fish comes to around 32,500 today.

breathe through gills of fish on both sides of the throat yet. The gills are known as filaments of filamentous structures. Each thread is through the capillary network that supplied the surface for easy exchange of oxygen and carbon dioxide increases. pulling oxygen-rich water through the fish's mouth and pumping it. about the gills In some fish capillary blood flows in the opposite direction by counter-current system. The gills past the oxygen-poor water Kiemenöffnungenaberturas on the sides of the pharynx. Sharks and lampreys have multiple Kiemenöffnungenaberturas, while some fish have single gill opening. The gill openings are by a protective cover called the operculum covered.

The Atemmechanismusmecanismo in fish is also variable. The skin has eel anguillid the ability to absorb oxygen. The buccal cavity of the electric eel has potential to absorb oxygen. Some fish such as perch, tilapia are also able to breathe air directly, but most fish depend on oxygen dissolved in water. Hide some air breathing fish even under damp caves and show a temporary hibernation mechanism and when enough water is available they show aestivation, returning to the water. Fish respirators can be mandatory or optional air. The African lungfish comes under the category of compulsory ventilation filter once the water comes to the surface to swallow air otherwise it will die from suffocation. Optional ventilation filters include the difficult portion of fish than most fish breathe dissolved in water, how to save energy by not coming to the surface to swallow air oxygen. Catfish in the absence of dissolved oxygen rely on dissolved oxygen in the gills.

The cycle of fish in the form of a closed loop. The heart pumps blood through this single loop throughout the body. The heart of the fish consists of four parts, including two chambers having an inlet and an outlet. The first part of the heart is the sinus venosus, which is a bag with thin walls and collects the blood from the veins of the body before the handover to the second part, which is the lobby. Lobby is a great Muskelkammercâmara which sends blood to the third part of the ventricle. The ventricle is thick walled and passes blood in the fourth part of the bulbous arteriosus. From here, the blood is passed into the aorta to the gills for the oxygen enrichment and.

FischbackenMaxilares são very well developed and allow them to eat a wide variety of food materials, if it is a plant or an animal. Food intake is carried out through the mouth and divided into the esophagus. The digestion of food in the stomach and in some species such as Fingermerkmalsprojektioncaracterísticaprojeção done yet, secrete digestive enzymes. These projections are called pyloric caeca. Pancreas and liver also secrete enzymes and help in digesting foods. The entire process of digestion and absorption in the intestine ends. The waste material rich in fish is ammonia, which means they are ammonotelic. The waste material from the body either through the gills or through the kidneys. Saltwater fish lose water by osmosis and reverse happens in freshwater fish. The kidneys excrete dilute urine amount. The scales of fish originate from the skin.

Compared with other vertebrates, but some larger fish such as sharks, the fish brain is relatively very small, Mormyrids have larger brains in comparison with the bird. The fish brain is composed of several parts. The front area is occupied by the olfactory bulb that receive and process the signals through two nostrils olfactory nerves. The olfactory lobes are usually very large sharks, Inger and catfish, as they, to catch their prey exclusively on a scent. Behind the olfactory bulb, a structure such as the two lobes telencephalon, refers to the equivalent to the brain of higher vertebrates. It is associated with olfaction. Both olfactory lobes and understand telencepahlon front of the fish brain.

The forebrain is connected to the diencephalon, midbrain. Between brain controls the function of hormonal regulation and maintenance of homeostasis. Pineal gland is present to recognize just above the diencephalon and changes in light, circadian rhythms and color changes. The midbrain or midbrain consists of two optic lobes are large in those fish that hunt by sight, such as rainbow trout and cichlids. The hindbrain or metencephalon performs the function of swimming and maintaining balance. The cerebellum is the largest structure of the brain and single lobed. Hagfish and lampreys have small cerebellae during Mormyrids serious cerebellae, as it is connected to their electrical sense. The rear part of the brain is the brain stem or myelencephalon. It regulates the functions of muscle coordination, together with respiration and osmoregulation.

Most fish have very well-developed sense organs. All diurnal fish have well developed color vision. Many fish are equipped with chemoreceptors that are responsible for extraordinary senses of taste and smell. Although fish have ears, but they are not able to hear well. The sensory receptors form the lateral line system, the currents in fish minutes and vibration and movement of the gripper close detected. Sharks and catfish can also detect electrical currents of low intensity. Electric eels generate electric currents. Experiments showed that fish have good powers of learning and memory.

Led by William Tavolga on the fish-SAPO experiment suggests that fish have the capacity for pain and fear responses. According to a study by Scottish researchers at the University of Edinburgh and the Roslin Institute in rainbow trout in 2003 suggests that it shows the behavior with pain associated, like other animals. The researchers injected bee venom and acetic acid into the lips of rainbow trout. The fish immediately began to rub her lips on the walls of the container and this was taken as the response to relieve pain by researchers. The firing of neurons similar to that found in humans is similar. Professor James D. Rose argues, however, that the fish do not feel pain when they no neocortex.

Fish paired group of muscles contact alternately arranged on both sides of the spine. These muscles Vertragsformformar S-shaped curves downward to move the body and helps in swimming. The fins also increase the surface area for efficient swimming tail. Streamlined body reduces the frictional force. Many have a bony fishes swim bladder, which is filled with gas and helps maintain buoyancy. Although fish are ectothermic animals, but there are always exceptions. Some fish are also amphibians such as mudskippers. Some fish maintain body temperature at a greater distance. All sharks are endothermic Lamnidae family. The degree of the endotherm varies in different fish but is expensive but benefits such as increased muscle strength, higher processing of the central nervous system and digestive higher.

The reproductive organs are fish testes and ovaries. In most species the gonads similar size and can be partially or completely melted. Secondary sex organs are also associated with the reproductive organs to improve their fitness. In terms of spermatogonia distribution of testes two species are found in teleost. In the first type of the testis along the seminiferous tubules found, while the other is present in testis along with the distal portion of the vas deferens. The ovaries of the fish are of three types. You can be gymnovarian, secondary and gymnovarian cystovarian. Gymnovarian ovarian oocytes directly into the coelomic cavity where they enter the ostium and eventually released eliminated through the fallopian tube. Secondary gymnovarian ovary releases eggs into the body cavity from which they go directly into the oviduct. Gymnovarian ovaries are primitive typwe in lungfish, sturgeon and bowfins present OFD ovaries. Cystovarian kidneys are the properties of most teleosts connected here as the ovary directly with the fallopian tubes.

The development of oogonia differs in different groups of fishes and provides details of maturation and the fertilization process. Changes in the core and surrounding layers ooplasm determine oocyte maturation. The post-ovulatory structures, which are formed during the release of eggs are absorbed by apoptosis. Some fish are hermaphrodites, they have both testes and ovaries in their bodies in different stages of their life cycle. About 97% of the fish are oviparous. The common oviparous fish eel, tuna, fish, cichlids and salmon. These fish fertilization takes place outside the mother's body, as both parents lose their gametes into the surrounding water. Some oviparous fishes practice internal fertilization process to provide the male with a sort of intromittent organ sperm genital opening of the female. Horn sharks and rays fall into this category. These fish male uses claspers deliver the sperm in the female's body.

Marine fish produce large numbers of eggs in the water column and open egg diameter is about 1 mm. The newborn boy oviparous fish called larvae. They are very sensitive and with a yolk sac for their food and as with adults in comparison they are very different in appearance. The larval period is very short and the larvae quickly lose their yolk sac and grow the juvenile stage and begin feeding on zooplankton. Since zooplankton present in sufficient quantities, many young people are losing their lives due to starvation. Guppies, coelacanths and the angel sharks are ovoviviparous. Here the eggs develop in the mother's body after fertilization and internal yolk obtained only as a means of nutrition.

Some species are viviparous. In some species the mother retains the eggs and nourishes the embryos. Lemon sharks, SplitFins plates and perches are typically viviparous fish here, the embryo receives nourishment through a placenta-like structure as found in mammals. In some viviparous sharks the developing embryos eat other eggs produced by the mother and this phenomenon is known as oophagy. The youth of the gray nurse show intrauterine cannibalism, where the young stronger devours weaker brethren. The immune system of the fish is also variable. The jawless fish lack true lymphoid organs. Erythrocytes, macrophages, and plasma cells produced in the intestine and kidney and elsewhere prior to have a large similarity with the bone marrow, such as in the case of hagfish. The cartilaginous fish have the immune system and the organ around epigonal gonads body within the walls of the intestine and Darmspiraleespiral valve for the production of immune cells are developed Leydig responsible. Cartilaginous fish developed the production spleen and thymus lymphocytes, macrophages and plasma cells. The bony fish show greater progress if the immune system. In spleen and thymus, mucosal cells in finfish dispersed act as Immungewebentecidos.

Like other animals fish also suffer from pests and diseases. Have developed remain free of disease, the defense system. The skin and scales, as well as the mucus secreted from the skin to prevent the ingress of microorganisms into the body of the fish. The immune system also plays a key role in fighting infections. The fish are believed to have evolved from coral-like sea squirt.

According to a report by the IUCN in 2006 are 1,173 species of fish in danger of extinction. Great White Sharks, Cod Hole pupfish hell are some of the endangered species. Overfishing is a very dangerous enemy of cod and tuna. Overfishing is responsible for the collapse of fish populations and progeny production is in danger.

Water pollution, the building of dams, removal of water for human use and introduction of exotic species is also responsible for the destruction of the habitat of native species and all this leads to the fish population decline. The introduction of the Nile perch in Lake Victoria cichlid population exterminated the lake.

Fish were found also with culture and religion connected. The fish assemblage in an area designated just a matter of feeding and nesting aggregation. Shoals or schools are formed according to their degree of organization. Shoals are loose organizations where a fish adjusts its movements and swimming behavior in response to the other members of a group. Schools of fish are tight organizations. All movements and other activities in the same direction Both schools and swarms benefit the fish in many ways.

We can conclude that the nature of Amazing Fishes supplied to help a number of adaptive features that they thrive in extreme environmental conditions.



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noreply@blogger.com (Operation Animal Rescue) 02 Dec, 2014

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Source: http://www.operationanimalrescue.com/2014/12/amazing-fishes-operation-animal-rescue.html
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