Northern Fur Seal - NOAA Fisheries
2021 Northern Fur Seal Pup Production And Adult Male Counts On The Pribilof Islands, Alaska
A Seal’s Whiskers Record a History of Foraging, Motherhood, and …
2021年5月11日 · Fur seal and sea lion whiskers don’t shed—they grow continuously from before a pup’s birth until the end of its life. Once formed, their chemical makeup does not change. And whiskers can be collected with minimal disturbance to animals—you need only one!
Northern Fur Seal Research in Alaska - NOAA Fisheries
6 天之前 · We estimate fur seal populations from the number of pups. Young pups are more reliable to count than adults because they remain on land until they are old enough to begin swimming to forage. At California rookeries, all pups are counted directly.
Rare Albino Fur Seal Pup Stands Out - NOAA Fisheries
2020年9月17日 · NOAA Fisheries Affiliate Vladimir Burkanov discovered an albino fur seal on a recent research trip to the remote island of Tyuleny in the Sea of Okhotsk, Russia. The reddish-gold pup has very light colored eyes and pink flippers.
2022 Northern Fur Seal Pup Production Estimate and Adult Male …
2023年2月2日 · Numbers of northern fur seal pups were estimated using a mark-recapture method, shear-sampling, on the Pribilof Islands during August 2022. To minimize disturbance, dead pup counts were conducted at 4 sample rookeries on St. Paul Island and 3 sample rookeries on St. George Island.
14 Seal Secrets - NOAA Fisheries
2021年3月22日 · Harbor seal pups, one of the smaller species of seals, weigh about 24 pounds at birth and are ready to swim within minutes. They are nursed for 4 to 6 weeks on milk that is 50 percent fat. Northern elephant seal pups weigh 75 pounds at …
Life on an Active Volcano: Fur Seals Adapt to a Changing …
2024年3月12日 · Northern fur seal pups on Bogoslof Island in 2023. Credit: NOAA Fisheries/Burlyn Birkemeier taken under NOAA Fisheries Permit #23283. In the Eastern Pacific stock, the overall population has been dropping, due …
2018 Northern Fur Seal Pup Production and Adult Male Counts on …
2018年11月8日 · Numbers of northern fur seal, Callorhinus ursinus, pups were estimated using a mark-recapture method, shear-sampling, on the Pribilof Islands during August 2018. We estimated 75,719 (SE = 1,008) pups were born on St. Paul Island and 21,625 (SE = 345) pups were born on St. George Island (Table 1).
Northern fur seal pup weights, Pribilof Islands, Alaska, 1957-present
This database contains northern fur seal pup mass and length data by date, island, rookery and sex on the Pribilof Islands, Alaska, collected between 1957-2016. Mass has been used as an index of condition and can be on indicator of the health of …
Lanugo Harbor Seal Pups - NOAA Fisheries
There are 3,000-5,000 harbor seal pups born in Washington inland waters each year, a very small portion of these pups are born prematurely and are known as lanugo pups. A lanugo pup is born with a long, fine, white fur that is normally shed in utero before being born.