نتایج جستجو برای: seals
تعداد نتایج: 4450 فیلتر نتایج به سال:
Trust seals, such as the VeriSign and TRUSTe logos, are widely used to indicate a website is reputable. But how much protection do they offer to online shoppers? We conducted a study in which 60 experienced online shoppers rated 6 websites – with and without trust seals based on how trustworthy they perceived them to be. Eye tracking data reveals that 38% of participants failed to notice any of...
Northern elephant seals, Mirounga angustirostris, travel between colonies along the west coast of North America and foraging areas in the North Pacific. They also have the ability to return to their home colony after being experimentally translocated. However, the mechanisms of this navigation are not known. Visual information could serve an important role in navigation, either primary or suppl...
In North Atlantic European waters, the nasal mite Halarachne halichoeri has been described affecting Grey seals (Halichoerus grypus) producing different levels of respiratory disease. This study provides data on the prevalence, clinical signs and produced macro-pathology of this parasite mite infecting juvenile wild Grey seals stranded in North-Western Spanish coast. Among the 25 seals examined...
Giardia and Cryptosporidium are protozoan parasites known to cause enteric disease in terrestrial wildlife species (mammals, reptiles and birds). Few surveys for Giardia and Cryptosporidium in marine wildlife species, such as pinnipeds, have been reported. The objective of this study was to determine the prevalence and genotype of Giardia and Cryptosporidium in two species of pinnipeds, harp se...
During their long migrations through the Pacific, northern elephant seals, Mirounga angustirostris, never haul out on land and they rarely spend more than a few minutes at a time at the surface. They are almost constantly making repetitive, deep dives, raising the question of when do they rest? One type of dive, the drift dive, characterized by a time-depth profile with a phase of lower than av...
The Austral autumn-winter is a critical period for capital breeders such as Weddell seals that must optimize resource acquisition and storage to provision breeding in the subsequent spring. However, how Weddell seals find food in the winter months remains poorly documented. We equipped adult Weddell seals after their annual molt with satellite-relayed data loggers at two sites in East Antarctic...
We measured concentrations of aluminum (Al), arsenic (As), cadmium (Cd), copper (Cu), lead (Pb), nickel (Ni), total mercury (THg), methylmercury (MeHg), selenium (Se), silver (Ag), and zinc (Zn) in liver from Harbor Seals (n 5 31) stranded dead in the inland waters of Washington State between 2004 and 2007. Results were compared by age class and region, and to results from past studies. Signifi...
Between January 1992 and December 2001 a total of 1,277 northern elephant seals (Mirounga angustirostris) and 940 Pacific harbor seals (Phoca vitulina) were stranded live along the central California coast. By examining medical records for each of the stranded seals, the primary cause of stranding and the secondary factors contributing to stranding were determined. The majority (88.3%) of anima...
To better understand the foraging behavior of diving animals it is important to monitor aspects of the animal’s environment, including prey distribution, which may influence their behavior. However, prior to recent technological advancements, monitoring the distribution of prey immediately surrounding a diving animal had been impossible. We attached newly developed Digital Still picture Loggers...
Tidewater glacial fjords in Alaska provide habitat for some of the largest aggregations of harbor seals (Phoca vitulina), with calved ice serving as platforms for birthing and nursing pups, molting, and resting. These fjords have also been popular destinations for tour ships for more than a century, with dramatic increases in vessel traffic since the 1980s. Seals on ice are known to flush into ...
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