摘要:

AbstractSquirrels cause damage by competing with man for nuts, fruit or grain crops, by competing for food with animals favoured by man, by gnawing human constructions and by stripping bark from trees grown for timber. Competition for food with man, game or livestock can best be prevented by excluding or destroying squirrels. Competition between Grey and Red squirrels in Britain is not yet understood, but the Grey squirrel may be more successful in deciduous woodland because it is better adapted to foraging there and for surviving food shortage than its congener. Gnawing power cables can be prevented by coating with glass beads as a repellant. The reasons for bark‐stripping are not clear, but it may well be triggered by food shortage, or possibly by agonistic behaviour, and the extent of damage may then be influenced by variation in the sap quality of the trees. Habitat management, to reduce the winter food supply for squirrels, and perhaps also to increase food availability during the summer damage period, may provide less costly control measures than killing squirrel

ISSN:0305-1838    

DOI:10.1111/j.1365-2907.1983.tb00277.x

出版商:Blackwell Publishing Ltd    

年代:1983

数据来源: WILEY

摘要:

AbstractA review of the successes and failures of chemosterilization procedures, as applied to a variety of mammalian pest species, is given. Oestrogens and progestins act to prevent ovulation in the female mammal; the frequency of dosing required makes them impractical for use with many species, although they have provided a viable method of contraception for feral cats. Prostaglandins which act to terminate pregnancy might prove more useful, but have so far only been used in humans and domestic animals. Control of male fertility depends either on the inhibition of spermatogenesis or on methods to render the spermatozoa infertile. The actions of the antiandrogen, cyproterone acetate, and chlorohydrin and 6‐chloro‐6‐deoxy sugars are discussed. Preliminary data on the action of prostaglandin F2α and cyproterone acetate on the Grey squirrel are pre

ISSN:0305-1838    

DOI:10.1111/j.1365-2907.1983.tb00278.x

出版商:Blackwell Publishing Ltd    

年代:1983

数据来源: WILEY

摘要:

AbstractThe management ofSciurusspecies is related to three main strategies: utilization; damage prevention; conservation. The tactics which have been used to implement these strategies and their effectiveness in different situations are briefly discussed. It is concluded that management strategies lack flexibility since monitoring is usually related to the current strategy. There is also a considerable time‐lag in translating biological knowledge and recommended changes in tactics to effective practic

ISSN:0305-1838    

DOI:10.1111/j.1365-2907.1983.tb00279.x

出版商:Blackwell Publishing Ltd    

年代:1983

数据来源: WILEY

ISSN:0305-1838    

DOI:10.1111/j.1365-2907.1983.tb00280.x

出版商:Blackwell Publishing Ltd    

年代:1983

数据来源: WILEY

ISSN:0305-1838    

DOI:10.1111/j.1365-2907.1983.tb00281.x

出版商:Blackwell Publishing Ltd    

年代:1983

数据来源: WILEY