Before
man began to harvest the seas on a commercial scale, there were more than
200,000 Blue Whales roaming the oceans of the world. Whaling has greatly reduced the number of whales and many species are in danger of extinction.
Large
scale commercial whaling during the 19th and 20th centuries greatly reduced Blue
Whale populations. The current worldwide population is only about 10,000-14,000.
The
blue whale is now listed as an endangered
species by the IUCN.
Blue
Whales are able to breed when they reach about 6-10 years of age.
The
gestation period (length of pregnancy) is 12 months and only one calf is born.
A Blue Whale calf drinks about 400 litres of mother’s milk each day and is eventually weaned at eight months after producing nearly 100 tonnes of the energy-rich food.
Newborn
Blue Whale calves are about 7 m long and weigh 2,700-3,600 kg and gain about 90
kg per day.
Blue
Whales eat krill (tiny shrimp) and occasionally pelagic crabs for the rest of
their lives. They live for 30 to 40+ years.
http://youngmarinescientist.blogspot.com/
http://geraldgoeden.blogspot.com/
http://goedensnews.blogspot.com/
http://goedenquotes.blogspot.com/
http://goedenmarineecology.blogspot.com/
http://gerryquotes.blogspot.com/
http://einsteinsnature.blogspot.com/
http://drgerrygoeden.blogspot.com/
http://underwaterinternet.blogspot.com/
http://goedenshark.blogspot.com/
http://gerrygoeden.blogspot.com/
Dr Goeden has a great story here. My kids love it.
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