Stephen Harris, Warren Cresswell, Peter Forde, W. J. Trewhella, Tom Woollard, Stephanie Wray
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 ... hiện toàn bộ
ABSTRACTFor any frustrated field‐mammalogists seeking observational data on
their elusive study animals, dung may represent the most readily‐available and
easily‐collected source of information upon which they may fall back in despair.
Yet it is surprising how much ecological information may be deduced from an
analysis of faecal depositions. This present article reviews some of the current
methods... hiện toàn bộ
Thomas J. O’Shea, Paul M. Cryan, David T. S. Hayman, Raina K. Plowright, Daniel G. Streicker
Abstract Despite conservation concerns for many species of bats, factors causing
mortality in bats have not been reviewed since 1970. Here, we review and
qualitatively describe trends in the occurrence and apparent causes of multiple
mortality events (MMEs) in bats around the world. We compiled a database of
MMEs, defined as cases in which ≥ 10 dead bats were counted or estimated at a
specific loc... hiện toàn bộ
AbstractExisting knowledge of the social organization, mating system and
reproduction of Humpback Whales (Megaptera novaeangliae) is reviewed to assess
how our current understanding of this wide‐ranging marine mammal fits into the
predictive framework developed from ecological studies of more accessible
terrestrial taxa. The small unstable groups characteristic of this species on
its summer feedin... hiện toàn bộ
AbstractResearch into dolphin swimming has historically been guided by false
assumptions of ‘effortless’, ‘high‐speed’ swimming. These assumptions have
instigated the development of drag‐reduction hypotheses but tests of these
hypotheses have generally had little success. The autecological approach has
dominated recent efforts and has been more successful. In this review we
summarize results of de... hiện toàn bộ
ABSTRACTOverhunting reduced Eurasian Beaver (Castor fiber) populations to c.
1200 animals, in eight isolated populations, around the end of the 19th century.
Protection, natural spread and reintroductions led to a powerful recovery in
both range and populations during the 20th century, which continues at a rapid
pace. The minimum population estimate is 593 000. There are also c. 12 500 North
Ameri... hiện toàn bộ