There are probably only around 2500 blue whales left in the oceans and they are now … 3. (Academic Press: London.). The calves nurse for around seven months. Menkhorst.) Establishing new parks and protected areas, Current park closures, fire and safety alerts, NSW Threatened Species Scientific Committee, Blue whale (Balaenoptera musculus) - endangered species listing.
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The average length of an adult blue whale is 79 to 88 feet and the average weight is 130 to 150 tons. Pygmy sperm whales have wrinkled skin and a brown to blue-gray back. The blue whales of the northern and southern hemispheres generally come together for mating, but they are considered two separate subspecies, Balaenoptera musculus musculus and Balaenoptera musculus intermedia. The pygmy blue whale (Balaenoptera musculus brevicauda) is a subspecies of the blue whale (Balaenoptera musculus) found in the Indian Ocean and the southern Pacific Ocean. Researchers have believed that the blue whale only eats in the summer, seldom eating during the rest of the year.
Recent authors recognise three Blue Whale subspecies (e.g. Approximately 360 000 Blue Whales were taken in the Southern Hemisphere during the 20th century (Clapham et al. Moreover, and despite the cessation of commercial whaling as a threat, Blue Whale numbers have been so severely depleted as to exacerbate their vulnerability to other threats. Mammal Review 5, 41-53.
Over 350,000 whales have been hunted and killed, and by the 1960s, blue whales were on the edge of extinction. Mead, T. (1985). Clapham, P.J., Young, S.B. (1995). ), Butterworth, D.S., Borchers, D.L., Chalis, S. and De Decker, J.B. (1995).
There has been only one recorded Blue Whale stranding in New South Wales (NSW), that of a 'true' Blue Whale at Twofold Bay in 1908 (Mead 1985). The 'true' Blue Whale subspecies musculus and intermedia are spatially disjunct, with each population migrating annually from winter breeding grounds in tropical and subtropical waters to summer feeding grounds in polar and subpolar waters (Yochem and Leatherwood 1985; Reilly and Thayer 1990). NSW Department of Planning, Industry and Environment, Nomination, assessment, public exhibition and listing, Search NSW Threatened Species Scientific Committee determinations. Blue Whales are extremely long-lived animals, with 'true' Blue Whales living up to 90 years and Pygmy Blue Whales to around 50 years (Warneke 1995). In view of the above points, the Scientific Committee is of the opinion that the Blue Whale, Balaenoptera musculus, is likely to become extinct in nature in New South Wales unless the circumstances and factors threatening its survival or evolutionary development cease to operate. Clapham et al. Reilly, S.B. Kato, H., Miyashita, T. and Shimada, H. (1995). 193-240.
Additional information about the catches of Soviet whaling fleet Sovietskaya Ukraina. 1999). The Pygmy Blue Whale is known mainly from the southern Indian Ocean, the eastern South Atlantic and the western South Pacific (Kato et al. By submitting, you consent to storage, use, and disclosure of your personal information in accordance with
Warneke, R.M. World whale stocks. They do not have teeth in their upper jaw but have 10 to 16 pairs of teeth in the lower jaw. Blue whale Balaenoptera musculus (Linnaeus 1758). 'Estimates of abundance for Antarctic Blue, Fin, Sei, Sperm, Humpback, Killer and Pilot Whales from the 1978/79 to 1985/86 IWC/IDCR sighting survey cruises.
(Oxford University Press: Melbourne. The Scientific Committee has found that: 1. Their eyes are dark and bulging, and they have a marking behind the eye that is often called a false gill because it looks like a fish's gill cover. But recent research has suggested that some blue whales of the north may eat year-round and that blue whales found traveling with empty stomachs may stop eating during migration and resume feeding at wintering areas. (1990). Ridgway and R. There are probably only around 2500 blue whales left in the oceans and they are now legally protected despite opposition by the whaling industry. 1995). There are three subspecies of blue whales. Blue whales are blue to blue-gray and may sometimes appear to have a faint yellow skin color because of the many microorganisms that accumulate on their bodies as they travel through colder waters. The Blue Whale subspecies Balaenoptera musculus musculus is currently listed as an Endangered Species on Schedule 1 Part 1 of the Threatened Species Conservation Act. It can consume several tons of krill daily. games and coloring pages!
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3 subspecies endangered: Northern Blue Whale (Balaenoptera musculus musculus), Southern Blue Whale (Balaenoptera musculus intermedia), Pygmy Blue Whale (Balaenoptera musculus brevicauda), This article is only an excerpt. Mammal Review 29, 35-60. Blue whales prefer cold waters and open seas and prefer not to venture near coastal areas.
Segregation of two sub-species of the blue whale in the Southern Hemisphere. (1997).
and Leatherwood, S. (1985). There are no confirmed records of Pygmy Blue Whales in NSW waters. Report SC/46/SH24.'
Report of the International Whaling Commission 45, 131-5. The third subspecies, the pygmy blue whale (Balaenoptera musculus brevicauda), is smaller than the others, and it is found in the sub-Antarctic waters of the Indian Ocean and the southeast Atlantic Ocean.
The current Southern Hemisphere 'true' Blue Whale and Pygmy Blue Whale populations have been estimated at 610 and 4 300 (respectively) (Butterworth et al. (International Whaling Commission Scientific Committee: Cambridge.).
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