Sentences with phrase «about whale populations»

Not exact matches

The old estimates were based on 20th - century data from the whaling industry itself, which estimated a worldwide sperm - whale population of about 1.8 million, a number that few scientists found credible.

Laidre's team looked at what is known about marine mammal populations that play a key role in Arctic ecosystems and human communities, focusing on polar bears, beluga whales, narwhals, bowhead whales, walrus, and six different seal species.

As it turns out, whales exchange lice so readily — and so thoroughly scramble the lice ancestry in each whale population — that lice genetics reveal nothing about how contemporary whales interact.

North Atlantic right whales (Eubalaena glacialis) are among the most endangered of all marine mammals: despite a recent population uptick, only about 450 remain.

Because whaling reduced the southern population to about 200 animals, the trait of lightness could spread quickly as the population recovers now that whaling has stopped.

Any changes, such as spotting skinny whales, might provide «early warning indicators» about possible population declines, Tyack said.

POPULATION COUNT It is estimated that there are about 40,000 to 80,000 beluga whales world wide.

About 60 percent of the North Pacific humpback whale population migrates to Hawaiian waters where they mate, give birth to and nurse their young.

Commercial whaling decimated many whale populations, including the eastern Pacific gray whale, but little is known about how population dynamics or ecology differed prior to these removals.

As of 2001, the Californian gray whale population had grown to about 26,000.

A population of about 200 gray whales stay along the eastern Pacific coast from Canada to California throughout the summer, not making the farther trip to Alaskan waters.

Over the last decade, dozens of collisions have seriously injured or killed whales off the California coast, and scientists think the population of about 2,500 blue whales that migrates along the West Coast each year may be especially at risk from ship strikes.

POPULATION COUNT It is estimated that there are about 15,000 - 22,000 gray whales world - wide.

«Every year, we offer new opportunities for our guests to learn about the humpback whale and observe them in their natural habitat across Maui Nui Basin, where their population is amongst the highest.»

And now giant squid populations are exploding in various regions — maybe a good thing for sperm whales, but ask Captain Nemo what he thinks about that!

Andrew Wilson, a researcher at ESO Whale and Dolphin Research Group with his company Five Oceans, gave a very informative presentation about Oman's Humpback Whale population.

This years research on Whale Shark Populations along the coast of the Yucatan shows that the Largest aggregation of Whale Sharks in the World is off the coast of Isla Mujeres and about 18 miles north of Cancun.

The drama unfolding now along the Monterey coast was unknown to researchers until about 1992, when the once vast gray whale populations began to recover after being driven nearly to extinction by whaling in the 19th and 20th centuries.

Combined with the use of highly outdated population estimates, and incorrect assumptions about the recovery factor NMFS set quotas (PBR) way too high for the Gray whale population.

Blue whales are currently listed as endangered animals with only about 2,500 left in the North Pacific population.

We used sequence variation in the mitochondrial COI gene to ask (i) whether cyamid population structures might reveal associations among right whale individuals and subpopulations, (ii) whether the divergences of the three nominally conspecific cyamid species on North Atlantic, North Pacific, and southern right whales (Euba.laena glac.ialis, Eubal.aena jap.onica, Euba.laena aust.ralis) might indicate their times of separation, and (iii) whether the shapes of cyamid gene trees might contain information about changes in the population sizes of right whales....

A clarification: although there are discrepancies about the populations of humpback whales, they are indeed on the federal endangered species list.

In the post, Monnahan stresses the big questions that remain about the more heavily hunted blue whale populations in the western North Pacific.

Newly available shipping lanes through the Northwest Passage would greatly shorten the trip between Europe and East Asia, but would likely cross the migratory route of any right whales that occupy the region.It's vital that we know about right whales in this area in order to effectively avoid ship strikes on what could be a quite fragile population.