Showing posts with label Whale. Show all posts
Showing posts with label Whale. Show all posts

Thursday, March 14, 2013

Killer Whale Famous Animal


Killer whales (Orcinus orca), also referred to as the orca whale or orca, and less commonly as the blackfish, is a toothed whale belonging to the ocean dolphin family. Killer whales are found in all oceans, from the cold Arctic and Antarctic regions to tropical seas. Killer whales as a species have a different diet, although individual populations often specialize in particular types of prey. Some foods exclusively on fish, while others hunt marine mammals such as sea lions, seals, sea lions, and even large whales. Killer whales are regarded as apex predators, lack of natural predators.

Killer whales are very social, some population consisting of matrilineal family groups the most stable of any animal species. Sophisticated hunting techniques and vocal behaviors, which are often specific to a particular group and traffic generation, has been described as manifestations of culture.

IUCN when assessing the conservation status of orca as the lack of data due to the possibility that two or more types of killer whales are a separate species. Some locals are considered threatened or endangered due to prey depletion, habitat loss, pollution (by PCBs), capture for marine mammal parks, and conflicts with fisheries. At the end of 2005, the "southern resident" killer whale populations that inhabit British Columbia and Washington state waters placed on the U.S. Endangered Species list.

Wild killer whales are not considered a threat to humans, although there are cases of captives killing or injuring their handlers at marine parks. Killer whales feature strongly in mythology indigenous cultures, with their reputation ranging from becoming the human soul for the killer mercilessly.

A special customized killer whale black bear back, white chest and sides, and a white patch above and behind the eyes. Calves are born with a yellowish or orange tint, which fades to white. Have weight and strong with large dorsal fin up to 2 m (6.6 ft). At the back fin, have a gray "saddle patch" behind the dark. Antarctic killer whales may have pale gray almost white on the back. Very special adult killer whale is not usually confused with any other sea creature. When viewed from a distance, teens can be confused with other cetacean species, such as the false killer whale or Risso's dolphin. Killer whale teeth are very strong and sealed enamel. Gripping jaws are powerful tools, because the upper teeth fall into the gap between the lower teeth when the mouth is closed. Front teeth inclined slightly forward and to the outside, allowing the killer whale to withstand powerful pull motion of the prey while the middle and back teeth continue to remain in place.

Killer whales are the remaining members of the largest of the dolphin family. Men typically ranges between 6 and 8 meters (20 to 26 ft) long and weighing more than 6 tons (5.9 long tons, 6.6 short tons). Women are smaller, generally ranging from 5 to 7 m (16 to 23 feet) and weighing about 3 to 4 tons (3.0 to 3.9 long tons, from 3.3 to 4.4 short tons). The biggest killer whale on record man is 9.8 m (32 ft), weighing more than 10 tonnes (9.8 long tons, 11 short tons), while the largest female was 8.5 m (28 ft), weight 7, 5 tonnes (7.4 long tons; 8.3 short tons). Calves at birth weigh about 180 kg (400 lb) and about 2.4 m (7.9 ft) long. Large size and strength of the killer whale made among the fastest marine mammals, able to reach speeds of over 30 knots (56 km / h). Frame structure delphinid killer whale is special, but stronger. Its integumentary, unlike most dolphin species to another, marked by growing dermal layer with fasikula dense network of collagen fibers.

Killer whale pectoral fins are large and rounded, resembling paddles. Male pectoral fins are significantly larger than females. At about 1.8 m (5.9 ft) male dorsal fin is more than twice the size of her and more of a triangular shape-tall, elongated isosceles triangle-whereas hers is shorter and more curved. Men and women also have different patterns of black and white in their genital area. Sexual Dimorfisme also appears in the skull, adult males have long lower jaw of the female, and have greater occipital crest.

An individual killer whales can often be identified from the dorsal fin and saddle patch it. Variations such as nicks, scratches, and tears on the dorsal fin and the pattern of white or gray in the saddle patch are unique. Published directories contain identifying photographs and names for hundreds of North Pacific animals. Photo identification has enabled the local population of killer whales to be counted each year of the budget, and have allowed an insight into the life cycle and social structure.
White killer whales occur sporadically but rare among normal killer whales, they have been seen in the northern Bering Sea and around St. Lawrence Island, and near the Russian coast. In February 2008, a white killer whale photographed 2 miles (3.2 km) from Kanaga Volcano in the Aleutian Islands.

Killer whales have good eyesight above and below the water, good hearing and a good sense of touch. They have a very sophisticated echolocation abilities, detecting the location and characteristics of prey and other objects in their environment by emitting clicks and listening to the echo.

Killer whales are found in all oceans and most seas. Because of their large range, numbers and density, distribution arrangements difficult to compare, but they clearly prefer higher latitude and coastal areas over pelagic environments.
This systematic review shows the highest density of killer whales (> 0.40 pieces per 100 km ²) in the northeast Atlantic around the Norwegian coast, in the north Pacific along the Aleutian Islands, the Gulf of Alaska and in the Southern Ocean off the coast of Antarctica lot. They are considered "common" (from 0.20 to 0.40 individuals per 100 km ²) in the eastern Pacific along the coast of British Columbia, Washington and Oregon, in the North Atlantic Ocean around Iceland and the Faroe Islands. High density has also been reported but are not counted in the western North Pacific around the Sea of ​​Japan, Sea of ​​Okhotsk, Kuril Islands, Kamchatka and the Commander Islands and in the southern hemisphere off the coast of South Australia, Patagonia, off the coast of southern Brazil and the southern tip of Africa. They are reported as seasonally common in the Canadian Arctic, including Baffin Bay between Greenland and Nunavut, and around Tasmania and Macquarie Island. Information for offshore regions and tropical waters are increasingly rare, but the appearance of the area, if not always, shows the killer whale can survive in most water temperatures. They have been seen, for example, in the Mediterranean, the Arabian Sea, Gulf of Mexico and the Indian Ocean around the Seychelles.

Probably the largest population lives in Antarctic waters, where they range up to the edge of the ice layer and is believed to tour the compact ice, finding open leads like beluga whales in the Arctic. In contrast, killer whales summer seasonal guests to Arctic waters, where they do not approach the ice. With the decline of Arctic sea ice in Hudson Strait fast, their coverage has now spread deep into the northwest Atlantic.

Migration patterns are poorly understood. Each summer, the same individuals appear off the coast of British Columbia and Washington. Despite decades of research, where these animals go for the rest of this year is not yet known. Transient pods have been seen from southern Alaska to central California. Killer whale population is sometimes a visit by 160 km (100 miles) in a day, but can be seen in the general area for a month or more. Killer whale pod ranges vary from 320 residents to 1,300 kilometers (200-810 miles).

Occasionally, killer whales swim into freshwater rivers. They have been documented 100 miles (160 km) along the Columbia River in the United States. They have also been found in the Fraser River in Canada and the Horikawa River in Japan.

Pilot Whale


Pilot whale are Cetacea belonging to the  Globicephala genus . There are two extant species, the long-finned pilot whale (G. melas) and short-finned pilot whale (G. macrorhynchus). The two are not readily distinguished at sea and analysis of the skull is the best way to distinguish between them. Between the two species, pilot whales range in waters nearly worldwide with long-finned pilot whales that live in the cold waters and short-finned pilot whales that live in tropical and subtropical waters. Pilot whale is one of the largest of the sea dolphins, exceeded only by the size of killer whales. They and other large members of the dolphin family are also known as blackfish.

Pilot whales, especially squid eaters, but will feed on fish as well. They are also very social and studies have shown that men and women still in their mother's ghost, an unusual trait among mammals, is also found in certain killer whale communities. Short-finned pilot whales are also one of the few mammalian species in which women experience menopause and post-reproductive females may contribute to the survival of the younger members of their pod. Pilot whales stranded themselves known for the beach, and is one of the most common stranders Cetacea. Several theories have been put forward to explain this behavior. Status of the two species is not understood and they were subject to direct and indirect catches by the fishing industry. Whalers in some countries continue to hunt pilot whales.

Most pilot whales dark gray, brown or black, but has a few light areas such as field gray saddle behind the dorsal fin. Other bright areas are anchor-shaped patch under the chin, kobaran faint marking behind the eyes, a big sign on the stomach and genital patch. Dorsal fin is set forward on the back and sweeps backwards. A pilot whale is stronger than most of the dolphins and have a special large, round melons. Pilot whales have long, sickle-shaped fins and tail stock is flattened from side to side. Long-finned pilot whales men have grown more rounded melon than girls, although this does not seem to be the case for short-finned pilot whales off the Pacific coast of Japan.

Pilot whales and short-finned length very similar making it difficult to tell the two species apart. They are traditionally distinguished by the pectoral fin length relative to total body length and number of teeth. The long-finned pilot whale is thought to have 9-12 teeth in each row and flippers 1/5 of the total body length, compared to the short finned pilot whale with his 7-9 teeth in each row and flippers 1/6 of the total length body. Study whales in the Atlantic show a lot of overlap in the characteristics of a species, not make them Clines special features. Thus, biologists have since used the skull differences to distinguish the two species. Finned pilot whale skull from short has rostum shorter and wider with premaxilla, which includes more than the upper jaw. In contrast, long-finned pilot skull whale has rostum longer if need be explained and maxille more open.

Size and weight depending on species for finned pilot whales are generally larger than short-finned pilot whales. Their survival rate is around 45 years in men and 60 years in females for both species. Both species show sexual dimorfisme. Long-finned pilot whales Adult body length reaching about 6.5 m, with a male to 1 m longer than females. Their body mass reached to 1,300 kg in women and up to 2,300 kg in males. For short-finned pilot whales, adult females reach about 5.5 m long body, while men reach 7.2 m and may weigh up to 3,200 kg.

Pilot whales can be found in the ocean almost all over the world. The long-finned pilot whales prefer the water a little cooler than short finned and is divided into two populations. Smaller clusters found in an encircling band in the Southern Ocean running from approximately 20 ° to 65 ° S S. This can be seen off the coast of Chile, Argentina, South Africa, Australia and New Zealand. There are estimated to be more than 200,000 people in this population. The second population is much larger and inhabit the North Atlantic Ocean, in a band stretching from South Carolina in the United States across to the Azores and Morocco at the southern end and from Newfoundland to Greenland, Iceland and northern Norway in the north. This population is estimated to be 778,000 people. It is also present in the western part of the Mediterranean Sea.

The short-finned pilot whales less densely populated areas. It is found in temperate and tropical waters of the Indian Ocean, the Atlantic and the Pacific. Its population overlaps slightly with long finned pilot whales off the coast of temperate North Atlantic and the Southern Ocean. There are 150,000 people in the eastern tropical Pacific Ocean. There are estimated to be more than 30,000 animals in the Western Pacific, off the coast of Japan. Pilot whales are generally nomadic, but some permanent residents throughout the year in places such as Hawaii and parts of California. They prefer waters of the shelf break and the water is dirty.

Monday, January 28, 2013

Sperm Whaler The Largest Of Toothed whales


Sperm whale (Physeter macrocephalus) is the largest of the toothed whales. This is a life member of the genus Physeter, and one of three extant species in the sperm whale family, along with pygmy sperm whale and dwarf sperm whales of the genus Kogia. A marine mammals, it has the largest brain of animals. Its name comes from the milky-white substance candles, spermaseti, was found in a very large head.

An adult male can grow up to 20.5 meters (67 feet) in length, with his head representing up to one-third of the length of the animal. Whales feed primarily on squid and colossal monsters. Falls to 3 kilometers (9,800 ft) to its prey, it is the deepest diving mammal. Vocalization pressing, echolocation and communication forms, can be as hard as 230 decibels underwater, until a loud voice, produced by any animal.

Cosmopolitan sperm whales that live in the ocean in a group called social unit. Unit of women and their children live separately from adult male sexually. The girls are working together to protect and nurse their young. Females give birth every three to six years, and care for the calves for more than a decade. Live up to 70 years, mature sperm whale has few natural predators. Calves and adults with weakened taken by pod Orcas.

From the early 18th century through the 20's are the main target species of whale hunters. Head whale contains substances called "spermaceti", which is used in lubricants, oil lamps, and candles. Ambergris, waste products from the digestive system, still used as fiksatif in perfume. Sometimes the large size of sperm whales are allowed to defend themselves effectively against whale hunters. This species is now protected by law, and is currently listed as vulnerable by the IUCN

Sperm whale is the largest toothed whale, with adult-sized males up to 20.5 meters (67 feet) long and weighing up to 57,000 kilograms (56 tons long, 63 short tons). In contrast, the second largest toothed whale, Baird's beaked whales measuring 12.8 meters (42 feet) and weigh up to 15 tons short (14,000 kg). The Nantucket whaling Museum has a 5.5 meter (18 foot) long jaw. Museum claims that this individual is 80 feet (24 m) long, whale drown Essex (one of the incidents behind Moby-Dick) was charged with 85 feet (26 m). A similar measure was reported from the jaw bone from the British Museum of Natural History. A 67-foot specimens are also reported from the Soviet whaling fleet near the Kuril Islands in the summer of 1965. However, there are discrepancies regarding man claims that approaches or exceeds 80 feet (24 m) long.
Average sizes LengthWeight
Bull16 metres (52 ft)41,000 kilograms (40 long tons; 45 short tons)
Cow11 metres (36 ft)14,000 kilograms (14 long tons; 15 short tons)
Newborn4 metres (13 ft)1,000 kilograms (0.98 long ton; 1.1 short tons)

Extensive whaling may experience a decrease of their size, as the man who highly sought after, especially after World War II. Today, men are usually not more than 18.3 meters (60 feet) in length or 51,000 kilograms (50 tons long, 56 short tons) in weight. Another view states that exploitation by overwhaling has almost no effect on the size of a bull sperm whale, and their size may have really improved in the current time on the basis of density dependent effects.
This is one of the most sexually dimorphic from around the Cetacea. At birth both sexes are about the same size, but adult males are usually 30% to 50% longer and three times more likely to be female.

Unique body of sperm whales may not be puzzled with other species. Special form of sperm whale comes from a very large head, block-shaped, which can be one-quarter to one-third of the length of the animal. The S-shaped blowhole is located very close to the front of the head and shifted to the whale left. It gives a special heavy spray, advanced-elbow.

Sperm whale worms are round and very thick. Pope worm burdens lifted out of the water for diving from eating. It has a series of third knob on the back of the tail and not the shape of dorsal fin. Largest ridge called the 'hump' by whale hunters, and can be mistaken for dorsal fin because of its shape and size.
In contrast to the delicate skin of most large whales, the dorsal skin is usually wrinkled and has been likened to prune by whale-watching enthusiasts. Albinos also have been reported.

Humpback Whale The Second Biggest Animal in World


Humpback whales (Megaptera novaeangliae) is a species of baleen whale. One of the great Rorqual species, adult length ranges from 12-16 meters (39-52 ft) and weigh approximately 36,000 kilograms (79,000 pounds). Slouching is a special body shape, with very long pectoral fins and a knobbly head. An acrobatic animals are due to a violation and slapped the water with his tail and pectorals, it is popular with whale observers from Australia, New Zealand, South America, Canada, and the United States.

Men produce a complex song that lasts 10 to 20 minutes, which they repeat for hours at a time. The purpose is not clear, although it may have a role in mating.

Found in oceans and seas around the world, humpback whales typically migrate up to 25,000 kilometers (16,000 miles) per year. Humpbacks feed only in summer, in polar waters, and migrate to tropical or subtropical waters to breed and give birth in the winter. During the winter, humpbacks fast and live from their fat recommendations. Their diet consists mainly of krill and small fish. Humpbacks feeding method has a wide repertoire, including the bubble net feeding technique.

Like other large whales, humpback was and is a target for the whaling industry. Once hunted to the brink of extinction, the population was down to 90% predicted before the moratorium was introduced in 1966. While stocks since recovered some of the bond in the capture tool, collisions with ships, and noise pollution continues to have an impact on 80,000 humpbacks worldwide.

A humpback whale can easily be identified by a stocky body with a clear hump and black dorsal coloring. The head and lower jaw are covered with knobs called tubercle, which is the hair follicles, and the characteristics of the species. Fluked tails, the lift on the surface in some dive sequence, have wavy edges left. Four global populations, all under study, namely: the North Pacific, Atlantic, and Southern Ocean humpbacks, which have different populations of migratory journey complete rotation every year, and the population of the Indian Ocean, which do not migrate, prevented by the North Sea coast.

The long black and white tail fin, which can be up to one third of the body length, and pectoral fins have unique patterns, which make individual whales identifiable. Several hypotheses attempt to explain the humpback's pectoral fins, which are proportionally the longest fins any cetacean. Two most enduring mention the higher maneuver provided by the fin length, and use of the increased surface area for temperature control when migrating between warm and cold climates.

Humpbacks have dark 270-400 Balin pancakes on each side of their mouth. Plate size of 18 inches only (46 cm) in front to about 3 feet (0.91 m) long in the back, behind the hinge. Ventral groove running from the lower jaw to umbilikus about half way along the bottom of the pope. This groove is much less abundant (usually 14 to 22) compared to other rorqual but wide enough.

Dorsal fin immediately after shot looks fatter when whales surface, but lost as worms appear. Humpbacks have 3 meters (9.8 feet), heart shaped to bushy blow, or breathing water through the spray holes. Because humpback whales breathe voluntarily, the Pope might turn off only half of their brain during sleep. Early hunters shot pontiff also recorded from humpback adults to be 10-20 feet (3.0 to 6.1 m) high.

Newborn calf about long head of their mother. At birth, the calf measured 20 feet (6.1 m) in the 2 short tons (1.8 t) The mother, by comparison, about 50 feet (15 m). They nurse for about six months, then mix nursing and independent feeding for six months with possibility. Milk is 50% fat slouching and pink.

Females reach sexual maturity at the age of five, achieving full adult size a little later. Men reach sexual maturity at around seven years. Humpback whales range from 45 to 100 year life span. Fully grown, males average 13-14 m (43-46 ft). Women are slightly larger at 15-16 m (49-52 ft), the largest specimen ever recorded is 19 meters (62 feet) long and have pectoral fins measuring 6 meters (20 feet), respectively. Body mass are usually in the range of 25 to 30 metric tons (28 to 33 short tons), with large specimens weighing more than 40 metric tons (44 short tons). Females have a hemispherical lobe about 15 cm (5.9 in) in diameter in her genital area. This visually distinguish men and women. Male penis usually remains hidden in the genital slit.

Blue Whale The Biggest Animal in World


The blue whale (Balaenoptera musculus) is a marine mammal belonging to the suborder Baleen whales (pronounced Mysticeti). At 30 meters (98 feet) in length and 170 tons (190 short tons) or more in weight, it is the largest known animal ever.

Long and slender, the blue whale body can be various shades of bluish gray under the lighter and somewhat dorsal. At least there are three different subspecies: B. m. musculus from the North Atlantic and North Pacific, B. m. intermedia of the Southern Ocean and B. m. brevicauda (also known as the pygmy blue whale) found in the Indian Ocean and South Pacific Ocean. B. m. indica, found in the Indian Ocean, may be another subspecies. As with other Balin whales, eating pattern consists almost exclusively of small crustaceans known as krill.

Blue whales are very abundant in nearly all oceans on Earth until the early twentieth century. For more than a century, they were hunted until near extinction by whale hunters to be protected by the international community in 1966. A report in 2002 estimated that there are 5.000 to 12,000 blue whales worldwide, located in at least five groups. More recent studies into the Pygmy subspecies may play down this show. Before whaling, the largest population was in the Antarctic, with a total estimated 239,000 (202,000 to reach 311,000). There is a balance that only a fraction (about 2,000) focuses on every eastern North Pacific, Antarctic, and Indian Ocean groups. There are two groups in the North Atlantic, and at least two in the southern hemisphere.

Description and Behaviour
The blue whale has a long tapering body that appears stretched in comparison with other whales stocky build. The head is flat, U-shaped and has a prominent dorsal blowhole on the run from the upper lip. The front of the plate thick mouth Balin; around 300 plates (each around one meter (3.2 feet) long) hang from the upper jaw, running 0.5 m (1.6 ft) back into the mouth. Between 70 and 118 grooves (called ventral folds) run along the throat parallel to the length of the body. These pleats help evacuate water from the mouth after eating Lunge (see feed below).

Small dorsal fin, beginning at an altitude of 8-70 centimeters (3.1 to 28 in.) (usually 20 to 40 centimeters (7.9 to 16 in.)) and on average about 28 cm (11 in) This. Visible only briefly during dive sequence. Located about three quarters of the way along the body, is different in shape from one person to another, some just have a bump barely visible, but others may have prominent and falcate (sickle-shaped) dorsals. When the surface to breathe, the blue whale raises shoulder and blowhole out of the water to a greater extent than other large whales, such as fin or sei whales. Observers can use this trait to differentiate between species at sea. Some blue whales in the North Atlantic and North Pacific increase its tail fluke when diving. When breathing, whales emit amazing singles-field vertical spout up to 12 meters (39 feet), usually 9 meters (30 feet). Lung capacity is 5,000 liters (1,320 U.S. gallons). The blue whale has a double spray holes protected by a large splashguard.

Fins are 3-4 meters (9.8 to 13 feet) long. The top in gray with white barring thin, white underside. Head and tail fluke are generally uniformly gray. The top of the whale, and sometimes fins, usually speckled. Level spots substantially differ from individual to individual. Some people may have a uniform gray color, but others had variations enough dark, gray-blue, and black, all speckled closely.

Blue whales can reach speeds of 50 kilometers per hour (31 mph) over short bursts, usually when interacting with other whales, but 20 kilometers per hour (12 mph) is more typical traveling speed. While eating, they slow down to 5 miles per hour (mph 3.1).

Blue whales most commonly live alone or with one other person. Is not known how long traveling pairs stay together. In locations where there is a high concentration of food, as much as 50 blue whales were seen scattered in a small area. They do not form a large, close group Balin seen in other species.

Physical Description
The blue whale is the largest animal ever known to have the largest dinosaur known from the Mesozoic Era lived.The is Argentinosaurus, which is estimated to weigh up to 90 metric tons (99 short tons).

The blue whale is difficult to weigh because of their size. As is the case with large whales targeted by whale hunters, adult blue whale has never been weighed whole, but cut into pieces dealt with first. This causes underestimate total weight of whales, because of the loss of blood and other fluids. Nevertheless, measurements between 150-170 metric tons (170-190 short tons) recorded animals up to 27 meters (89 feet) long. Individual weight of 30 meters (98 feet) long believed by the American National Marine mammals Laboratory (NMML) to more than 180 metric tons (200 short tons). Largest blue whale accurately weighed by NMML scientists to date was a woman who weighs 177 metric tons (195 short tons). As a whole, the blue whale of the North Atlantic and Pacific looks smaller than the average of those from sub-Antarctic waters.

There is some uncertainty about the biggest blue whale ever found, as most data comes from blue whales killed in Antarctic waters during the first half of the twentieth century, and collected by whale hunters are inexperienced in standard zoological measurement techniques. Heaviest whale ever recorded weighed in at 190 metric tons (210 short tons). The longest whales ever recorded two females measuring 33.6 meters (110 feet) and 33.3 meters (109 feet), although in none of these cases is the weight gradually collected. The longest whale measured by scientists at the NMML was 29.9 meters (98 feet), the woman caught in the Antarctic by Japanese whale hunters in 1946-1947. Lieutenant. Quentin R. Walsh, USCG, while acting as inspectors whaling factory ship Ulysses, validated measurement of 30 m (98 ft) pregnant blue whales caught in the Antarctic in 1937-38 season. The longest reported in the North Pacific is 27.1 meters (89 feet) female taken by Japanese whale hunters in 1959, and reportedly the longest in the North Atlantic is 28.1 meters (92 feet) female caught in Davis Strait.

Because of the large size, several organs of the blue whale is the largest in the animal kingdom. Blue whales tongue weighs around 2.7 metric tons (3.0 short tons) and, when fully expanded, its mouth is large enough to store up to 90 metric tons (99 short tons) of food and water. Although the size of the mouth, throat dimensions such that a blue whale can not swallow an object wider than a beach ball. His heart weight 600 kg (1,300 lb) and is the largest known in any animal. A blue whale aorta is about 23 cm (9.1 in) with him.  During the first seven months of her life, the blue whale calf drinks approximately 400 liters (110 USgal) of milk every day. Blue whale calf weight quickly, as much as 90 kilograms (200 pounds) every 24 hours. Even at birth, they weigh up to 2,700 kilograms (6,000 lb)-the same as that already adult hippopotamus. The blue whale has a brain relatively small, only about 6.92 kilograms (15.26 pounds), about 0.007% of body weight