摘要:

ABSTRACTIt has been suggested that soil ingestion in herbivores provides an extra source of essential minerals. The present paper is a follow‐up to this theory, intended to show that other soil properties, like buffering capacity and adsorption capacity, could also form major attractive reasons for soil consumption. Notably, lactic acidosis and disorders caused by forage anti‐quality components (secondary compounds etc.) might be prevented or alleviated by selective soil intake. Harmful effects of soil intake are also briefly revie

ISSN:0305-1838    

DOI:10.1111/j.1365-2907.1985.tb00391.x

出版商:Blackwell Publishing Ltd    

年代:1985

数据来源: WILEY

摘要:

Book reviewed in this article:COLOUR ATLAS OF VERTEBRATE ANATOMY: AN INTEGRATED TEXT AND DISSECTION GUIDE. By G. M. King and D. R. N. Custance.ANIMALS AND ARCHAEOLOGY I. HUNTERS AND THEIR PREY. Edited by JulietClutton‐Brock and Caroline Grigso

ISSN:0305-1838    

DOI:10.1111/j.1365-2907.1985.tb00392.x

出版商:Blackwell Publishing Ltd    

年代:1985

数据来源: WILEY

摘要:

ABSTRACTForty‐five badgers representing five social groups were removed from an area in Staffordshire where tuberculosis had occurred in cattle. Prior to removal, the tuberculosis status of the badger population was investigated by screening faeces samples, collected at fortnightly intervals, and badger social‐group territories were determined by bait‐marking. Samples for cultural and biological examination were taken from the live badgers before euthanasia and detailed post‐mortem examination. The adult badger population density was 6‐2/km2 andMycobacterium boviswas isolated from samples takenpost mortemfrom eight (17‐8%) badgers. The results are reviewed in relation to previo

ISSN:0305-1838    

DOI:10.1111/j.1365-2907.1985.tb00393.x

出版商:Blackwell Publishing Ltd    

年代:1985

数据来源: WILEY

摘要:

Book reviewed in this article:WILD MAMMALS OF NORTHWEST AMERICA.By Arthur Savage and Candice SavageMAMMALS OF THE NATIONAL PARKS.By Richard G. Van Gelder.

ISSN:0305-1838    

DOI:10.1111/j.1365-2907.1985.tb00394.x

出版商:Blackwell Publishing Ltd    

年代:1985

数据来源: WILEY

摘要:

ABSTRACTSimilarities in general size, geometry, lifestyle, and environment mean that certain energetic constraints are common and peculiar to Holarctic tree squirrels as a group. Holarctic tree squirrels are relatively small, diurnal mammals which, in association with their food niche, maintain activity throughout the autumn‐winter period. Despite this, they exhibit no major morphological or physiological adaptations to minimize energy expenditure at low temperatures; on the contrary, both basal metabolism and conductance are higher than expected on the grounds of physical size. When they are active energy expenditure is therefore strongly influenced by effective ambient temperature for these species when active in their natural autumn‐winter environments. Nest use allows near‐basal metabolism at most natural ambient temperatures. The balance of economical inactivity against feeding rewards offset by cold exposure must therefore be a crucial aspect of the lifestyle of these squi

ISSN:0305-1838    

DOI:10.1111/j.1365-2907.1985.tb00395.x

出版商:Blackwell Publishing Ltd    

年代:1985

数据来源: WILEY