Sentences with phrase «whale population estimates»

He later said that the minke whale population estimate was mistaken and noted that there was little compelling evidence showing that killer whales were significantly reducing minke whale numbers in that region.

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.

Palumbi used two different types of gene in the sampled whale meat to derive his estimated pre-whaling population estimate of between 500,000 and one million.

Most estimates of historic whale population size have been extrapolated from old whaling figures, but this method is often very inaccurate, argues marine biologist Steve Palumbi of Stanford University's Hopkins Marine Station in California, US.

* Correction, 22 November, 12:19 p.m.: The story has been changed to reflect that the population estimate of whale sharks corresponded to individuals in one genetically similar group.

In one year, a Soviet expedition took 1200 right whales, the most endangered of large whales, from a world population estimated at only 2500 animals.

From an initial population of roughly 250 000 blue whales, there remain no more than 2250 and possibly as few as 225 of them in the Southern Ocean; the best estimate is around 700.

This is intended to take account of some of the uncertainties inherent in data on whale populations, and requires only two kinds of data: current estimates and their statistical error; and historical details of catches.

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.

In the subsequent Marine Mammal Science paper just out, the catches were among the key pieces of information used to model the size of the California blue whale population over time — a model previously used by other groups to estimate populations of hundreds of fish and various other whale species.

The new estimates suggest that proposals to lift the International Whaling Commission's 18 - year - old moratorium on commercial whaling are based on a faulty assessment of what constitutes natural populationWhaling Commission's 18 - year - old moratorium on commercial whaling are based on a faulty assessment of what constitutes natural populationwhaling are based on a faulty assessment of what constitutes natural population sizes.

Norway will itself update its population estimates in July with a «sighting survey», an approved method of extrapolating whale populations from the number spotted from ships.

As of 2012, both the East and West Coast whale populations had more than 63 % (East Coast) and 90 % (West Coast) of the number of whales estimated in each population before the whaling era (approximately 1912 - 1972).

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

The blue whale population is estimated to be around 14,000.

Of particular interest is the possibility of a large population decline prior to whaling, as such a decline could explain the ∼ 5-fold difference between genetic estimates of prior abundance and estimates based on historical records.

This western North Pacific population of gray whales, estimated to include fewer than 100 individuals, remains highly depleted and its continued survival is questionable.

They state that «the most recent population estimate [from 2007] was approximately 19,000 whales, with a high probability (88 %) that the population is at «optimum sustainable population» size, as defined by the Marine Mammal Protection Act.

Research biologist, John Calambokidis, discused his work tracking the movements and estimating the populations of blue and humpback whales in the North Pacific at the May «From Shore to Sea» lecture.

As of 2011, the population of western Pacific (seas near Korea, Japan, and Kamchatka) gray whales was an estimated 130.

That episode rekindled debate over what should be done to reduce threats to the estimated 2,000 blue whales of an overall global population of 10,000 that feed off California each summer.

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

The gray whale population is now estimated at 21,000, believed to match the pre-whaling census.

The coastal population of minke whales from California through Washington is estimated at only 600-1000 individuals.

By Al Zagofsky - Special to the Times News of Carbon County Pennsylvania April 17, 2004 petting whale Since whaling was banned in 1946, the California Gray Whale population has rebounded from near extinction to a population that has been estimated to be as high as 27whale Since whaling was banned in 1946, the California Gray Whale population has rebounded from near extinction to a population that has been estimated to be as high as 27Whale population has rebounded from near extinction to a population that has been estimated to be as high as 27,000.

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.

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.

This whale population, hunted nearly to extinction generations ago, is slowly recovering, with an estimated 450 right whales dividing their time between winter calving areas off the southeastern United States and summer feeding grounds from New England north.

North Pacific humpback whales came particularly close to extinction, with an estimated population of just 1,500 before the whaling ban took place.

More than 200,000 Antarctic blue whales used to live in the Southern Ocean — but 20th Century whaling decimated this population and latest estimates put this population at just around 2,300 animals.

By 1998, the population was estimated to have increased to 2,280 (95 % CL, 1,160 — 4,500), based on sighting surveys conducted under the auspices of the International Whaling Commission (IWC) during the International Decade of Cetacean Research and Southern Ocean Whale and Ecosystem research cruises (IDCR / SOWER)[5].

Although LeDuc et al. [15] did not consider their sample size to be sufficient for an analysis of geographic structure in the Antarctic blue whale, they were able to report the first estimate of mtDNA diversity in the population and a minimum census of 26 haplotypes among 46 individuals.

Whale Fact: Pre-whaling population estimates were over 350,000 blue whales, but up to 99 % of blue whales were killed during whaling efforts.