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Tag: "seals" at biology news

Grizzlies set to invade high Arctic?

...mes. But now definitive corroborating DNA evidence seals the case of the most northerly sighting of a grizzly bear. The discovery fuels mounting evidence that Canada's High Arctic is no longer the sole preserve of the polar bear -- Nanuk is having to make room for its southern cousin. The evidence of the ...

Elephant seal pups suffer from ocean warming

...ease in the weight of elephant seal pups. Elephant seals are shown to be sensitive to ocean temperature cha...uch as those caused by El Niño. Sea lions and fur seals that feed near their rookeries at the surface of the ocean are known to be very sensitive to water t...

Seal rookeries could provide a reliable food source for endangered California condors, study finds

...PNAS), the research team concludes that whales and seals have been an integral part of the condor's diet si...vation strategy to train them to start eating dead seals and sea lions, whose populations are coming back along the California coast." Captive breeding S...

Marine mammals are on the frontline of failing ocean health

...mercury are higher in animals like polar bears and seals that have fish and marine mammal-based diets, while cadmium (a heavy metal associated with bone and renal disease) is higher in organs of mammals with invertebrate-based diets. "The issue is to understand how pollutants are transferred through t...

High-tech tags on marine animals yield valuable data for biologists and oceanographers

...elephant seals, Antarctic fur seals, and crabeater seals in the Southern Ocean. California sea lions are ... group was also tracking the movements of elephant seals and albatrosses. These species, which typically forage across a broad area of the North Pacific Ocea...

El Nino events affect whale breeding

...It is known that these changes affect penguins and seals in the Antarctic, but this is the first time the link has been made with whales as they return to their calving grounds in the South Atlantic. Keith Reid from British Antarctic Survey (BAS) said, "These results help us to understand processes in thr...

Alaska seal pup diet may hold key to decline of population

...imental Biology 2006. The study found that harbor seals pups that were heavier when captured from the wild...bor seal and could tie the declining population of seals and other marine mammals with the change in availability of seal prey, including herring," lead auth...

Common carp sheds new light on surviving in extreme environments

...ge quantities in diving mammals such as whales and seals and helps them remain submerged for long periods during deep sea dives. Similarly in humans, myglobin levels in the heart and some fatigue-resistant muscles increase when at high altitudes. New findings of myglobin levels in the common carp could he...

Contrary to common wisdom, scientist discovers some mammals can smell objects under water

... this"'" Catania said. "Do animals like otters and seals do anything similar" Or is there a size limit and it only works for smaller mammals"" He hopes that publication of his paper will encourage researchers who are studying all kinds of semi-aquatic animals to take a closer look at how they are using t...

Seals protect brain, conserve oxygen by turning off shivering response on icy dives

... Norway. The research provides insight into how seals allow their bodies to cool (become hypothermic) du... birds and mammals," examines how diving birds and seals preserve brain cell function in the face of oxygen deficits. The study is by Folkow, Stian Ludvigsen...

MIT material stops bleeding in seconds

...emble into a nanoscale protective barrier gel that seals the wound and halts bleeding. Once the injury heal...peptides self-assemble into a gel that essentially seals over the wound, without harming the nearby cells. Even after excess gel is removed, the wound remain...

Robotic whiskers can sense three-dimensional environment

...ermine the size, shape and texture of objects, and seals use their whiskers to track the fluid wakes of their prey. Two Northwestern University engineers have been studying the whisker system of rats to better understand how mechanical information from the whiskers gets transmitted to the brain and to de...

Unique gene regulation gives chilly bugs survival advantage at bottom of the world

...nlinger, adding that other native animals, such as seals and penguins, spend much of their time in the water. The midge is also the only insect known to inhabit Antarctica. He and his colleagues collected adult and larval midges during field study tours to Antarctica in early 2005 and 2006. They gathered...

Female Antarctic seals give cold shoulder to local males

Female Antarctic fur seals will travel across a colony to actively seek males...tic Survey (BAS) studied a colony of Antarctic fur seals (Arctocephalus gazella) on the subantarctic island of South Georgia. They discovered that female fu...

Iowa State scientists demonstrate first use of nanotechnology to enter plant cells

... nanoparticle has a unique "capping" strategy that seals the chemical goods inside. In previous studies, his group successfully demonstrated that the caps can be chemically activated to pop open and release the cargo inside of animal cells. This unique feature provides total control for timing the delivery...

Want to save polar bears? Follow the ice

... where sea ice—a vital habitat for polar bears and seals that they prey on—will remain into the near future. "The polar bear could be at the crossroads," said Scott Bergen, a landscape ecologist with WCS’ Living Landscapes Program and the principal investigator for the project. "The survival of some po...

Physicist cracks women's random but always lucky choice of X chromosome

...ve a suicide gene called XIST which, if activated, seals the chromosome behind a barrier of RNA preventing the activation of any other gene. Researchers believe that this suicide gene can be itself blocked by a plug of proteins forming on top of its specific location on the chromosome but they had little i...

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