نتایج جستجو برای: river otter
تعداد نتایج: 84535 فیلتر نتایج به سال:
When managing populations of threatened species, conservation managers seek to make the best conservation decisions to avoid extinction. Making the best decision is difficult because the true population size and the effects of management are uncertain. Managers must allocate limited resources between actively protecting the species and monitoring. Resources spent on monitoring reduce expenditur...
A juvenile, female sea otter (Enhydra lutris nereis) was observed in 43 instances of the flehmen response over 19 days from May through July of 2015 at the Oregon Zoo. In all flehmen grimace observations, the juvenile sea otter engaged in nibbling, nosing, or licking the peri-mammary or anogenital areas of a non-lactating, geriatric female sea otter. The flehmen behavior observed was consisted ...
According to the "social intelligence hypothesis," species with complex social interactions have more sophisticated communication systems. Giant otters (Pteronura brasiliensis) live in groups with complex social interactions. It is likely that the vocal communication of giant otters is more sophisticated than previous studies suggest. The objectives of the current study were to describe the air...
Studies of consumer-resource interactions suggest that individual diet specialisation is empirically widespread and theoretically important to the organisation and dynamics of populations and communities. We used weighted networks to analyze the resource use by sea otters, testing three alternative models for how individual diet specialisation may arise. As expected, individual specialisation w...
Airborne measurements of meteorological, aerosol, and stratocumulus cloud properties have been harmonized from six field campaigns during July-August months between 2005 and 2016 off the California coast. A consistent set of core instruments was deployed on the Center for Interdisciplinary Remotely-Piloted Aircraft Studies Twin Otter for 113 flight days, amounting to 514 flight hours. A unique ...
A decline in total PCB levels in tissues of otters (Lutra lutra) from England and Wales, averaging 8% per year over the period 1983-1992, is reported. Mean PCB levels are now unlikely to pose a threat to otter populations.
This dataset compiles information on giant otter (Pteronura brasiliensis) specimens housed in the major zoological collections of Brazil. We have personally examined specimens, which constitute skins, crania, and partial skeletons. compiled collector, date, locality specimens. A total 56 six were located. Of this total, 12 do not associated information. special relevance are from Brazilian stat...
Abstract Abandoned, lost or otherwise discarded fishing gear represents a substantial proportion of global marine plastic pollution and can cause significant environmental socio-economic impacts. Yet little is known about its presence in, implications for, freshwater ecosystems downstream contribution to in the ocean. This study documents gear-related debris one world's largest contributing riv...
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