摘要:

AbstractThe status of the 15 species of exotic mammals naturalized in Britain is briefly reviewed along with the problems they cause and the costs of control. The legislation governing the keeping of exotic mammals is discussed and an assessment is made of the number of mammals kept in Britain for purposes other than food production. These include 3 200 000 kept for experimental purposes, over 12 848 in zoos, 100 000 Mink on farms and over 11 million households with at least one pet. The results of a recent survey of animals held in Britain under the Dangerous Wild Animals Act 1976 are presented; nearly 1000 individuals of at least 76 species are held under this legislation.Between January 1970 and October 1989, 293 exotic mammals, of 39 species not normally kept as household pets, were recorded out of captivity on 127 occasions. An analysis of the sources of these exotics and their subsequent fate is presented. It is suggested that monitoring the occurrence of exotic species out of captivity provides information on which species are most likely to establish feral populations in the future. This will allow preventive measures to be planned and their efficacy to be assessed before a new exotic species becomes established.

ISSN:0305-1838    

DOI:10.1111/j.1365-2907.1990.tb00105.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

AbstractNinety‐three papers on home‐range analysis using radio‐tracking data were reviewed; these papers were found in a literature search of 18 of the major journals likely to include such papers, published in the 5‐year period to the end of 1988. The review showed that even 25 years after the first radio‐tracking studies, in the majority of papers there was still insufficient attention given to accurate and sufficient data collection, and to using appropriate and sophisticated analytical techniques to assess home‐range size and configuration. This paper is designed to help people undertaking a radio‐tracking study to avoid some of the most common pitfalls. It is based on some of the problems we have experienced studying several species of larger mammals. We use our collective experience to produce a guide on how to plan a radio‐tracking study, to highlight some of the potential problems in designing the study and collecting the data, and to identify some of the difficulties that may be encountered during the analytical stages. The advantages and disadvantages of the most frequently used methods of home‐range analysis are discussed and methods for determining the minimum number of radio‐fixes and techniques for adjusting inadequate sample sizes are described, as are the problems that may be caused by

ISSN:0305-1838    

DOI:10.1111/j.1365-2907.1990.tb00106.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

ISSN:0305-1838    

DOI:10.1111/j.1365-2907.1990.tb00107.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

AbstractTwenty‐one species of deer occur in China: one species of Tragulidae, three species of Moschidae and 17 species of Cervidae. The foundation of this review is the research conducted in the early 1940s by Allen, combined with the research and investigation by the authors and other Chinese specialists since that time. This paper focuses on the tentative distribution of these species of deer for future research effort

ISSN:0305-1838    

DOI:10.1111/j.1365-2907.1990.tb00108.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY