Sentences with phrase «individual whale populations»

Not exact matches

In the largest study of its kind to date, researchers used mitochondrial DNA microsatellites from skin samples gathered from more than 3,000 individual humpback whales across the Southern Hemisphere and the Arabian Sea to examine how whale populations are related to one another, a question that is difficult to answer with direct observations of whales in their oceanic environment.

* 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.

The authors point out that the findings support previous observations of individual male whales moving between populations in different ocean basins, and that subpopulations from both regions could share the same feeding ground in Antarctic waters.

Using data generated from more than 3,000 skin samples from individual whales ranging from the South Atlantic to the Indian Oceans, the research team has uncovered previously unknown degrees of relatedness between different whale populations.

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.

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

Frederick Sound harbors the largest summer population of humpback whales in the world, up to 500 individuals, so our chances of seeing these massive animals is excellent.

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

The whales migrating past Point Cabrillo belong to the Eastern Pacific Gray Whale population of roughly 20,000 to 25,000 individuals.

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....

There is one population of around 2,000 blue whales off the coast of California — but all told there are only around 10,000 to 25,000 individuals left.

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.