摘要:

AbstractThe Amazonian ManateeTrichechus inunguis(Natterer, 1883) is the only exclusively freshwater sirenian and the smallest of the living species. Its inability to reduce peripheral heat loss limits its distribution to tropical waters. The species is endemic to the Amazonian region, being distributed throughout the Amazon basin, occurring mainly in calm waters and lakes. The species has been commercially exploited since 1542, with the meat and hide being the main products extracted. This commercial exploitation, combined with their very low reproductive rate, has seriously reduced the manatee population. Therefore the Amazonian Manatee is now considered an endangered species. Although it is protected by most of the countries where it occurs, there is no law enforcement, and the species is still captured throughout the Amazon. Data on general biology, physiology and management of the Amazonian Manatee, as well as its status and recommendations for its conservation, are presented.

ISSN:0305-1838    

DOI:10.1111/j.1365-2907.1994.tb00134.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

AbstractA tabular checklist of the parasites of wild House MiceMus domesticusis presented, with data on prevalence rates and geographic location. Parasites most often recorded are:Syphacia obvelata, Taenia taeniformis, Aspiculuris tetraptera, Hymenolepis diminutaandTrichuris maris.The near‐global distribution of House Mice and their ability to survive in a wide range of conditions render House Mouse parasites ideal for the study of environmental influences on parasites and transmission of parasites to new host

ISSN:0305-1838    

DOI:10.1111/j.1365-2907.1994.tb00135.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

AbstractAlthough the pest status of the European MoleTalpa europaea L.in Britain has never been adequately assessed, it is perceived as being a pest of agricultural and amenity land and is widely persecuted. We review the Mole's pest status, and evaluate current and proposed control methods.While there has been a recent decline in the demand for strychnine, abuse of this poison leads annually to the death of many wild and domestic animals. The need remains for a humane, practical and safe alternative. If strychnine were banned without such an alternative being available, the use of mole‐traps would probably increase. Through post‐mortem examination of trapped Moles we evaluate the humaneness of these traps.Our returned questionnaires showed that, while most farmers perceive Moles as pests, the damage which is attributed to them is slight on the great majority of farms. Control of Moles was none the less common and widespread, and was undertaken by 49.5% of respondents in 1992. Perceived pest status and the favoured method of control varied regionally; these trends may be related to soil quality and cultivation type.Silage pollution was the most widely cited agricultural problem attributed to Moles. Practical measures to reduce silage pollution by Moles are discussed, particularly with regard to silage collection and treatment using bacteriophages. The efficiency of these additives merits detailed study because they have the potential, regardless of whether pollution has occurred or not, to improve the quality of the silage to an extent that killing Moles may be unnecessary; less than 1% of respondents reported that 10% or more of their silage was seriously affected by Mole activ

ISSN:0305-1838    

DOI:10.1111/j.1365-2907.1994.tb00136.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY