Sentences with phrase «for whale populations»

Not exact matches

Killing whales for commercial purposes had driven Australian whale populations, especially those of sperm and humpback whales, frighteningly close to the edge of extinction.

Despite the long gap since then, mean concentration of the chemicals in the blubber of some populations of Europe's killer whales exceeds — often by a lot — a high threshold for health damage.

Shane Gero of Dalhousie University in Halifax, Nova Scotia, Canada, and his colleagues tracked sperm whale populations in the Caribbean and Sargasso seas to see what happened when mothers dived for food.

Pyenson says that after the ice age the non-migratory whales would have been easy targets for early whalers, so the migratory population has come to dominate.

Finally, the team calculated that the dozen observed killer whale attacks on otters, extrapolated to the general population, could account entirely for the observed declines.

The finding, experts say, has implications for conservation management, which often solely focuses on the number of animals in a population, and may extend to chimpanzees, dolphins, whales, and other species.

It is fundamental for evaluating the status of killer whale populations.

Using genetic techniques for the first time to estimate past populations, Stephen Palumbi of Stanford University and Joe Roman of Harvard University concluded that the oceans were once filled with 10 times more great whales than historical records indicate.

For the work published in PLOS ONE, the scientists then used acoustic calls produced by the whales to separate — for the first time — the catches taken from the California population from those whales taken in the western Northern Pacific near Japan and RussFor the work published in PLOS ONE, the scientists then used acoustic calls produced by the whales to separate — for the first time — the catches taken from the California population from those whales taken in the western Northern Pacific near Japan and Russfor the first time — the catches taken from the California population from those whales taken in the western Northern Pacific near Japan and Russia.

The paper reviews population sizes and trends over time, if known, for each group, ranging from millions of ringed seals to fewer than a hundred beluga whales in Northern Canada's Ungava Bay.

For example, the new study notes that restoring whale populations could help increase the ocean's capacity to absorb climate - warming carbon dioxide.

«Killer whales have been thought of by some as something like the poster child» for the process, «because there are multiple genetically distinct populations [which have not yet been formally described as separate species] with different prey preferences in the North Pacific and Antarctic,» says Phillip Morin, a cetacean biologist at the Southwest Fisheries Science Center in San Diego, California, who was not involved in the new study.

In the 1970s and 1980s, for example, researchers argued that reducing certain whale populations would aid stocks of krill, a ubiquitous crustacean in the Southern Ocean that is a key food source for baleen whales and other marine species.

But with bowheads, which are slowly recovering from intense whaling in the 19th century, conservations groups would be highly motivated to buy all the shares for 13 years, until the population grows to the carrying capacity.

The samples were then analyzed with a technique called polymerase chain reaction (PCR), used to amplify specific nuclear «microsatellites» for statistically measuring gene flow between the different populations and subpopulations located in the western South Atlantic (Breeding Stock A) and the eastern South Atlantic and Indian Ocean populations (Breeding Stocks B and C, and the Arabian Sea humpback whale population, respectively).

Now the trio has created a model to examine in more detail how a cap - and - trade market might impact whale populations and how the costs and benefits would change for people who want to hunt or conserve them.

The model combines whale population dynamics with an economic model of demand for whales and shows what happens to prices and populations when whalers and nongovernmental organizations (NGOs) exchange shares.

The study highlights the need for more research on whale sharks as well as a multinational, cooperative effort to conserve populations in both the Red Sea and Indian Ocean.

«The future of these dolphins would appear to be as secure as any population of any species can be in this era of climate change,» says the study's lead author, Mike Bossley of Whale and Dolphin Conservation Australasia in Port Adelaide, who has studied the area's dolphins for 25 years.

Whale researchers don't know how big the population was before that, but it was devastated enough for the right whale to be given protected status in Whale researchers don't know how big the population was before that, but it was devastated enough for the right whale to be given protected status in whale to be given protected status in 1935.

However, according to Professor Lars Bejder at Murdoch University Australia, School of Veterinary and Life Sciences and his international co-authors, data reveals that these whale populations are increasing at remarkable rates (9 % for West Coast and 10 % for East Coast; as of 2012), the highest documented worldwide.

In the future, genetic analyses can greatly increase researchers» still very limited understanding of whale shark ecology and the status of what appears for now to be at least 2 populations.

«Insights on whale shark populations and evidence for their historic rise, recent decline.»

But the scientific committee has not done enough work yet to complete management plans for four populations: the western North Pacific common minke, Antarctic minke, sei, and Southern Ocean fin whales.

The scientists say they will need several years before they can complete their surveys and come up with a credible management plan for all the whale populations currently being targeted.

Catch - limit models have been run for several of the whale populations currently being hunted — such as the western North Pacific Bryde's whales and the North Atlantic common minke whales.

Failure to account for the effects of climate change on these dynamics will undermine our ability to understand changes in the standing biomass of Antarctic krill and also to predict the recovery of whale populations from a century of mismanagement and overexploitation [37].

As a result, understanding changes in population size for social species — several of which, such as African wild dogs and southern resident killer whales, are endangered — requires understanding of what goes on within groups and how individuals fare when they strike out on their own.

It dates back to the early 1800s and includes mention of the famed Lahaina Roads, also a channel once known for its population of whales.

Try Limantour Beach in Point Reyes, which is famed for its long, white stretches of sand and immense wildlife population, where you can whale - watching and hike for days.

It's important to note that the gray whale population along our coast is thriving, and gray whale calves provide vital sustenance for transient killer whales.

The future focus for field research will be to explore connections to populations of whale sharks found in more remote places on Earth.

When diving here, you can see eleven different species of sharks, 479 species of fish, and large pelagics such as jacks, manta ray, tuna, and whale sharks.It also has the highest population density for white tip reef sharks!

Many were also the target for commercial industry, leading to a sharp decline in all populations of exploited species, such as whales and seals.

Eastern gray whales represent a useful case study for investigating historic population dynamics and in particular the discrepancy between genetic and historical data, because both genetic diversity and historical records have been examined in depth [5], [16], [17].

British Columbia has the largest population of Orcas (Killer Whales) in the world so Canada whale watching tours in BC are a favourite for fans of the incredible Killer Wwhale watching tours in BC are a favourite for fans of the incredible Killer WhaleWhale.

It provides breeding and feeding grounds for at least twenty - five endangered or threatened species; thirty - six marine mammal species, including blue, gray, and humpback whales, harbor seals, elephant seals, Pacific white - sided dolphins, and one of the southernmost U.S. populations of threatened Steller sea lions; over a quarter - million breeding seabirds; and one of the most significant white shark populations on the planet.

Jim Lecky, director of the Office of Protected Resources for the National Oceanic and Atmospheric Administration fisheries service, said blue whales do not face imminent danger as a population and that their numbers are slowly increasing from year to year.

However, the North Atlantic population of gray whale became extinct sometime in the 17th or 18th Century, for reasons that are not clear.

«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.»

When you consider the annual number of deaths for the entire gray whale population, this really isn't an alarming number of deaths.

A snorkeling - friendly colony of sea lions and a nearby population of plankton - eating whale sharks make Espiritu Santo an extraordinary destination for kayakers and wildlife enthusiasts alike.

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!

En route we keep our eyes peeled for dolphins and whales — Antarctic and Arctic populations of humpback whales visit these shores to calf a mate each year!

Once the center of the sardine packing industry, today the small city on California's central coast is famous for its proximity to large populations of whales, seals, sea lions and sea otters as well...

Balcomb's Center for Whale Research just released their population summary for Washington's orca whales in 2010.

Blue whales can migrate big distances, but Sri Lanka's population tend to stick around for long periods in Mirissa on the south coast — with most sightings from November to April.

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.

Gray whales of Baja California Sur, a tourist attraction in expansion Published March 14, 2015 EFE By Ana Lopez Barron After reaching its largest population in almost 20 years, the gray whale has definitely become an important tourist attraction for... Continue reading →

What this means is that the IWC Scientific Committee will soon set quotas for more Gray Whales to be killed by indigenous tribes based on deeply flawed and incorrect population estimates provided by the US Government.