Tag: "otter" at biology news
Purdue Researchers Track Oil Spill's Effects On Sea Otters
...in Prince William Sound has had on the Alaskan sea otter
population. He's part of a team investigating why the otter
population in the spill area has not rebounded to pre-spill numbers. Snyder and Alan Rebar, dean of ...
USGS Finds Sea Otters At Risk From Killer Whales In A Changing Ocean
...ia,Santa Cruz, reported on sharp reductions in sea otter
numbers in the NorthPacific rim. "We estimate tha...early to extinction by the early 20th century, sea otter
populationsgrew again under the protection of the International Fur Seal Treaty, reachingnear maximu...
Killer Whales Have Begun Preying On Sea Otters, Causing Disruption Of Coastal Ecosystems In Western Alaska
...ing near sea otters, but neversaw one attack a sea otter
until 1991. Since then, about a dozen such attackshave been reported. Sea otter
populations, meanwhile, have declined by about 25 percent each yearduring the 1990s throughout large...
Swimming Proficiency Of Marine Mammals Ranks Them Among The World's Elite Animal
... mink and river otters do,Williams noted. The sea otter
is an unusual case because it has the body of a semiaquaticmammal, but spends most of its time in the water. Williams views sea otters asliving on an "evolutionary edge," meeting their energetic requirements by such aslim margin that they are highly ...
USGS reports continued decline of California sea otters
...cientists do not understand why the California sea otter
is declining, said Estes. Sea otter
deaths, as indicated from beach-cast carcasses, have increased over the same time period that t...
USGS scientist awarded prestigious Marine Conservation Fellowship
...system, recently marked sharp declines in sea otter
populations in the ecosystem. Regarded a...ed of sea otter, sea urchin and kelp. The sea otter
feeds on sea urchins and suppresses their numbers, which in turn enhances the total production ...
USGS finds elevated levels of organochlorine pesticides in Aleutian bald eagles
... resident on the islands, depend on fish, sea otter
pups and seabirds for food, but the percentage of the kind of food eaten by the eagles varies tremendously from island to island. On Amchitka and Kiska Islands, for example, seabirds were the primary bald eagle food, composing about 6...
The wonderful world of waves
...er forecasting. Instruments involvedinclude a twin otter
and Long-EZ aircraft; a small water area, twin hull (SWATH)craft; air-sea interaction spar (ASIS) buoys; and subsurfaceinstruments. The most intensive part of the experiment will run Nov. 10 throughDec. 10....
USGS reports increase of sea otters in recent survey
...but has since declined. In 1977 the California sea otter
was listed as threatened under the Endangered Spec...ishing gear may have contributed to the recent sea otter
decline, Estes says. The USGS National Wildlife Health Center in Madison, Wis., California Departmen...
Using hard science to protect fragile seas
...munching on Pacific sea urchins. The southern sea otter
was hunted to near-extinction by 19th-century Russ...ete protection ever since. Today, the state`s sea otter
population has risen above 2,000. As the voracious critters made their comeback, the urchin populati...
Cover story in Science reveals historical overkill of marine Megafauna triggered current ocean crises
...d the well-publicized collapse of sea lion and sea otter
populations in the Bering Sea. But new work related to this study by Alan Springer (University of Alaska) and co-author James Estes at UC Santa Cruz and several others, suggests that vast depletion of the great whales by humans has contributed to thi...
Scientists examine the seas our ancestors fished to better understand today's changing oceans
... Estes said exploring the evolutionary role of sea otter
predation of sea urchins in California revealed that southern kelp had developed strong defenses against plant eaters that made them less susceptible to sea urchin overgrazing than Alaska kelp forests, which lacked such defenses....
People linked to new sea otter diseases
The California sea otter
is in trouble and people may inadvertently be part of the problem. Nearly half of sea otter
deaths are associated with infectious diseases and several of thesemay be indirectly caused by peopl...
UC study links parasites in freshwater runoff to sea otter deaths
...uthern sea otters dying in California. The current otter
population is 10 percent lower than it was in 1995...ns in these otters. To understand the rise in sea otter
deaths, scientists from the Wildlife Health Center in the UC Davis School of Veterinary Medicine joi...
Cat parasite killing otters; Michigan's perch pressured; HACCP for medicine
...f circumstantial evidence linking cats to a lethal otter
disease. University of California at Davis profess...lifornia this past spring. For more than a decade, otter
numbers rose, hitting a peak in the spring of 1995. The recovery, for reasons still unexplained, app...
Marine reserves can't do it all: Sea otters vs. red abalone
... fisheries are closed. Similarly, California's sea otter
population is at roughly 2,000 and is dropping by about 1-2% each year. While the state has two marine reserves that protect the otters from people, there are none that protect the abalone from otters. To see if reserves can both protect the sea ott...
Troubling news about sea otter deaths
... new study identifies the most important causes of otter
deaths in California and determines where otters a...avis wildlife veterinarian who has been performing otter
necropsies for Fish and Game since 1998. The researchers' key findings: In a healthy population, juv...
Collapse of seals, sea lions & sea otters in North Pacific triggered by overfishing of great whales
...) that killer whale predation was driving down sea otter
populations and affecting kelp forest ecosystems. ...er whale predation had a significant impact on sea otter
populations, but the question remained as to whether they could really account for the other decline...