antarctic blue whale

ANTARCTICA’S BLUE WHALE ARE MADE UP OF THREE POPULATIONS

Antarctica blue whales (Balaenoptera musculus intermedia) a critically endangered subspecies and the largest extant animal, are made up of three populations, according to a recent study of Australian researches based in a new DNA analysis, the results are published in Scientific Reports.

Researchers suspect that the three populations go their separate ways when they head north to breed – presumably heading into the three major Southern Hemisphere ocean basins: the South Pacific, South Atlantic and Indian Oceans. Individuals from the three populations occur together throughout the Antarctic, although possibly in different proportions in different areas. This is probably because the blue whales need to rove long distances around Antarctica to find the massive amounts of krill that make up their sole food source.

Scientists urge that future research should invest in locating the breeding grounds and migratory routes of Antarctic blue whales through satellite telemetry to confirm their population structure and allow population-level conservation.  

Antarctic blue whales reduced in abundance from 239,000 before hunting commenced in the 1904/05 austral summer season to a low of 360 when they were last hunted in the 1972/73 season. The most recent abundance estimate was 2,280 from surveys conducted between the 1992/93 and 2003/04 austral summer. This is only about 1% of pre-exploitation abundance. The subspecies is classified as Critically Endangered in the International Union for Conservation of Nature (IUCN) Red List of Threatened Species.

anonymous asked:

who has the most Lungs

look what i found !

SCIENCE

BIOLOGY

ZOOLOGY

Credit:SCIEPROScience Photo LibraryGetty ImagesQ:Which animal has the largest lungs?

A:QUICK ANSWER

The animal with the largest lungs in the world is the blue whale. In total, its lungs have a combined capacity of over 1,300 gallons of air.

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FULL ANSWER

Blue whales can be found throughout the world’s oceans. In their habitat in the Antarctic, blue whales can grow to be up to 110 feet long and can weigh more than 200 tons.

The lungs of the blue whale are highly efficient and are able to pass up to 90 percent of the inhaled oxygen to the bloodstream. In stark contrast, the equivalent figure for human beings, on average, is a scant 15 percent.

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Sources:

nmfs.noaa.gov

en.wikipedia.org

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