Seal gut and walrus ivory
نویسندگان
چکیده
منابع مشابه
Persistent organic pollutants in Alaskan ringed seal (Phoca hispida) and walrus (Odobenus rosmarus) blubber.
Since 1987, the Alaska Marine Mammal Tissue Archival Project (AMMTAP) has collected tissues from 18 marine mammal species. Specimens are archived in the National Institute of Standards and Technology's National Biomonitoring Specimen Bank (NIST-NBSB). AMMTAP has collected blubber, liver and/or kidney specimens from a number of ringed seals (Phoca hispida) from the areas near Nome and Barrow, Al...
متن کاملMerchants and ivory
Two African states, Tanzania and Zambia, are seeking to change the ban on trade in ivory at the meeting next month of the Convention on the International Trade in Endangered Species (Cites) in Qatar. But the countries face a battle, because other states, such as Kenya and Mali, are strongly opposed to any change and have been lobbying the EU in Brussels this month to support a block to any chan...
متن کاملPacific walrus: Benthic bioturbator of Beringia
The dependency of walruses on sea ice as habitat, the extent of their feeding, their benthic bioturbation and consequent nutrient flux suggest that walruses play a major ecological role in Beringia. This suggestion is supported by several lines of evidence, accumulated during more than three decades of enquiry and leading to the hypothesis that positive feedbacks of walrus feeding strongly infl...
متن کاملBehavioral sleep in the walrus.
In this study we examined behavioral sleep in the walrus, the only living species of the family Odobenidae. The behavior of four 1.5-2-year-old captive walruses was videotaped continuously for 7-17 days and scored in 1-min epochs. When walruses had access to water and land, behavioral sleep, the combined amount of quiet and rapid eye movement (REM) sleep, occupied on average 17+/-4% of 24 h (n=...
متن کاملApical seal versus coronal seal
the results of the initial study. It was concluded that the apical fluids, with their primary source being blood serum, diffuse into the empty canal spaces, stagnate, undergo degradation and then act as a physicochemical irritant when they diffuse back into periapical tissues. In support of this theory of stagnation, in 1955 Dow and Ingle showed that the majority of the endodontic failures were...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: British Dental Journal
سال: 2019
ISSN: 0007-0610,1476-5373
DOI: 10.1038/s41415-019-0940-0