2019-09-23

With an increasing otter population in Britain, mortality because of road traffic accidents (RTAs) has escalated during the last 15–20 years and has become one of the most important causes of death of otters in most European countries (Philcox, Grogan & Macdonald 1999).

The otter population in Ireland is considered of international importance due to its widespread distribution throughout the country (Ottino & Giller 2004) and its relatively stable demographic This population, established by introducing sea otters back into the area in the late 1980s, struggled at low numbers through the 1990s. However, over the last decade, the population has grown rapidly at an average rate of about 10 percent per year. 2021-03-29 · When a sea otter wants to rest, it wraps a piece of kelp around its body to hold itself steady among the rolling waves. Likewise, California's sea otter numbers are holding steady despite many forces pushing against their population recovery, according to the latest field survey led by federal, state, and UC Santa Cruz scientists. The otter, Lutra lutra, is one of our most charismatic yet elusive mammals.It is mainly nocturnal and rather shy. The otter is one of conservation’s success stories: following a catastrophic decline during the 1950’s and 1960’s, there are now healthy otter populations throughout most of Wales.

… 2020-12-11 2019-12-10 Sea otters in Prince William Sound were from the original surviving 1911 population. In 1969 & 1970, 59 sea otters were released along the outer coast of Washington state. This represents a translocated population. 2021-02-20 Based on this 2016 survey, 22 states reported increasing populations, 25 states reported stable populations, and 2 states (Arizona and Washington) reported an uncertain population trend . River otters were legally harvested in 40 states, while closed harvest seasons existed in 9 states; Arizona, California, Colorado, Nebraska, New Mexico, Rhode Island, South Dakota, Utah, and Wyoming . The otter population is widespread and individuals are wide-ranging, normally occurring at low densities, which is reflected in the relatively large number of sites where the species occurs as a qualifying feature, but is not a primary reason for site selection.

Ebenhard T ( 2000 ) Population viability analyses in endangered species management : the wolf , otter and peregrine falcon in Sweden . Ecological Bulletins 48

2021-02-20 Based on this 2016 survey, 22 states reported increasing populations, 25 states reported stable populations, and 2 states (Arizona and Washington) reported an uncertain population trend . River otters were legally harvested in 40 states, while closed harvest seasons existed in 9 states; Arizona, California, Colorado, Nebraska, New Mexico, Rhode Island, South Dakota, Utah, and Wyoming . The otter population is widespread and individuals are wide-ranging, normally occurring at low densities, which is reflected in the relatively large number of sites where the species occurs as a qualifying feature, but is not a primary reason for site selection. 2021-02-01 2021-04-10 The population dynamics of otters present a somewhat bleak picture.

av J Truve · 2012 — Several carnivores, i.e. lynx, fox and otter show a positive growth rate in both areas. The wild boar population is also growing whilst moose density remains fairly

It is estimated that 90% of the world population of sea otters reside in the nearshore waters in Alaska.

However hunting which began the downfall of the sea otter in the Northern Pacific Ocean. Sea otters can also drink salt water and thus can remain at sea for several days at a time. Sea otters are usually solitary but are sometimes seen in groups—gatherings of up to 2,000 have been observed along the coast of Alaska.
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ES&T 2013: Strong increases in PFAS concentrations in otters from southern Otters har en tät päls bestående av en kombination av underrock och ökad population av späckhuggare rovade örnar mer på marina fåglar Population III. Alk. Mera Öl: maris otter juggle bitter stigbergets. Blomstergatan 13, Göteborg. 031-386 54 55.

”NASA Earth Observations: Population Density”. Abstract : In this thesis, molecular genetic methods were used to study a threatened species, the Eurasian otter. Estimates of population size and population edit. Papers.
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Sammanfattning : In the 1950s the otter started to decline in numbers and distribution in Sweden and other parts of Europe. In 1972 a game law came into force,

The smooth-coated otters are believed to have swum across the Johor Straits from Malaysia to the north side of Singapore in 1998, before deciding to make the island their home. Otters return to every county in England Once the rivers were cleaned up, fish returned to once-polluted waters and otters began to spread back eastwards from their strongholds in Devon and Wales Abstract. Otters Lutra lutra were persecuted increasingly in Britain for fishery protection and for sport throughout the 18th and 19th centuries. There are indications of a population recovery occurring during the 1914–1918 war with the temporary cessation of hunting and keepering.