whale migration east coast usa

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As soon as the cold weather settles in, however, they travel to warmer waters to mate and give birth. Jeffreys Ledge extends from the coast of Rockport to Cape Elizabeth, Maine.

And bring sunscreen and sunglasses. A leading marine biologist believes there could be a link between the spate of shark attacks off the east coast of Australia and the large number of whales migrating north.In the past five weeks, there have been three fatal sharks attacks off the east coast of Australia as well as another presumed shark attack off Cairns that resulted in an injury to the lower leg.Dr Julian Pepperell, an independent marine biologist and author, said it was a "reasonable hypothesis" there were more shark attacks because there were more sharks following the whales on their annual migration north.While authorities were quick to act when a whale died close to shore, little research was done.As the number whales increased each year, so was the number of big sharks which would feed off whales when they died.Macquarie University marine scientist Dr Vanessa Pirotta said it was estimated the humpback whale population was about 35,000 and "was growing at around 11 per cent each year".She said humpback whales were known to live between 50 to 80 years, but would also be dying of old age and other causes, providing food for huge apex predators.Dr Pepperell said big sharks like great whites and tigers were known to "gorge themselves" on the flesh of dead whales.

"We only think sharks follow humpback whales as they travel along the east and west coasts," Dr Pepperell said. "It stands to reason with a lot more whales — which there are — there may be a steady increase in the population of white sharks which are fully protected.

But what we do know is that when whales die and when they float they attract numbers of large sharks very quickly.

The eastern Humpback whales of eastern Australia Each year between April and November, Australia’s eastern coastline comes alive with the spectacular acrobatic displays of humpback whales.

How do I broach it with her?

The website of Whale & Dolphin Conservation provides information about over 80 (!) 17/07/2020.

".While there was a significant body of research showing how Australia's humpback whale population was increasing and was now bigger than pre-whaling days, understanding of white shark numbers was less precise.A CSIRO genetic study in 2018 estimated there were about 750 adult great white sharks in eastern Australian with a total population, including juveniles, of around 5,460.However, this figure was based on the world-first genetic analysis technique and not on actual counts.The "close-kin mark-recapture" involved taking tissue samples from juvenile sharks and obtaining a DNA profile of that animal to see how many shared one or two parents.Dr Pepperell said that study had been completed two years ago and it was logical the number of adult great whites had now increased, and were looking for food.Not all whales that die end up floating on the surface for sharks to feed off.Dr Pirotta said whales were also known to drop to the bottom of the ocean in an incident known as "whale fall".These carcasses would then provide food for the creatures living on the ocean floor.This service may include material from Agence France-Presse (AFP), APTN, Reuters, AAP, CNN and the BBC World Service which is copyright and cannot be reproduced.

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