ISSN:0305-1838    

DOI:10.1111/j.1365-2907.1986.tb00020.x

出版商:Blackwell Publishing Ltd    

年代:1986

数据来源: WILEY

摘要:

AbstractThere is good evidence that die three rarer British predatory mammals, the Polecat, Pine Marten and Wild Cat, owe their present restricted distribution to intense human persecution. Since this persecution has now diminished considerably, it would be feasible to attempt to reintroduce them to parts of Britain where they were exterminated last century. More important, however, would be attempts to reintroduce mammals which became totally extinct in historic times, including Aurochs, Boar, Brown Bear, Beaver and Wolf. The last of these survived the longest, and is a prime candidate for consideration. There are good ecological reasons for attempting to reintroduce it to Rhum, where the large herd of Red Deer has to be culled by one sixth each year in an attempt to reduce overgrazing and starvation. Evidence of studies in North America suggests that Wolf predation would be a far more efficient way of controlling the Red Deer; and it would be more in keeping with the management objectives of a National Nature Reserve. Similarly an attempt should be made to use genetically ‘reconstituted’ Tarpan and Aurochs to diversify the grazing, rather than domestic ponies and cat

ISSN:0305-1838    

DOI:10.1111/j.1365-2907.1986.tb00021.x

出版商:Blackwell Publishing Ltd    

年代:1986

数据来源: WILEY

ISSN:0305-1838    

DOI:10.1111/j.1365-2907.1986.tb00022.x

出版商:Blackwell Publishing Ltd    

年代:1986

数据来源: WILEY

摘要:

AbstractThe British population of the Eurasian OtterLutra lutrahas shown a serious decline since 1957–1958. In England the surviving population is broken into small fragments which may not be viable. One way to strengthen the population to enable it to recover would be to insert breeding units into the gaps. A practical methodology using captive‐bred Otters in groups of three is described. This was tested successfully in 1983–1985 in East Anglia, with the first two release groups now breeding. The male in the 1983 group was tracked using a radio harness to be sure of survival and to monitor behaviour and use the environment. Data were obtained on die development of a home range in the new environment. Also, useful information was gathered on swimming and hunting speeds, time of emergence, distance travelled each night, activity periods and time spent in each habitat. This behaviour is compared to that of previously tracked wild Otters in Scotland. The very close similarity of many features is encouraging and results may be taken as indicative of the behaviour of wild Otters in lowland Br

ISSN:0305-1838    

DOI:10.1111/j.1365-2907.1986.tb00023.x

出版商:Blackwell Publishing Ltd    

年代:1986

数据来源: WILEY

ISSN:0305-1838    

DOI:10.1111/j.1365-2907.1986.tb00024.x

出版商:Blackwell Publishing Ltd    

年代:1986

数据来源: WILEY

摘要:

AbstractIn late 1984 10 young Red Squirrels (Sciurus vulgaris) trapped in Scotland were released into Regent's Park and monitored by radio‐telemetry. We wanted to investigate the reasons why the introduced Grey Squirrel has replaced the Red over much of Britain; disease, aggression and ecological competition have all been suggested as the cause. The relevant guidelines governing policy on reintroductions were followed. A few months after release, the animals appear well established. They benefit from a specially‐designed hopper which allows them to feed from it but prevents Grey Squirrels doing

ISSN:0305-1838    

DOI:10.1111/j.1365-2907.1986.tb00025.x

出版商:Blackwell Publishing Ltd    

年代:1986

数据来源: WILEY

摘要:

AbstractThe feral cattle, currently numbering 33, which inhabit the Orkney island of Swona, are described. Their behaviour while foraging for seaweed is compared with that of sheep, and aspects of their social behaviour and population structure are compared with what has been observed among the Chillingham white cattle.

ISSN:0305-1838    

DOI:10.1111/j.1365-2907.1986.tb00026.x

出版商:Blackwell Publishing Ltd    

年代:1986

数据来源: WILEY

摘要:

AbstractIn this paper the recent population changes of the Wild Boar in different European countries is analysed through the study of hunting statistics. A simultaneous increase in numbers is observed throughout the whole area during the period 1965–1975. From 1975 onwards the population stabilizes itself apart from in peripheral areas like Finland. Potentially favourable factors which play a part in this process are discussed and certain reproductive and dispersive characteristics which favour its invasive behaviour are discusse

ISSN:0305-1838    

DOI:10.1111/j.1365-2907.1986.tb00027.x

出版商:Blackwell Publishing Ltd    

年代:1986

数据来源: WILEY