Ibis
SCIE-ISI SCOPUS (1859-2025)
1474-919X
0019-1019
Anh Quốc
Cơ quản chủ quản: WILEY , Wiley-Blackwell Publishing Ltd
Lĩnh vực:
Ecology, Evolution, Behavior and SystematicsNature and Landscape ConservationAnimal Science and Zoology
Phân tích ảnh hưởng
Các bài báo tiêu biểu
THE IMPORTANCE OF CERTAIN ASSEMBLAGES OF BIRDS AS “INFORMATION‐CENTRES” FOR FOOD‐FINDING
Tập 115 Số 4 - Trang 517-534 - 1973
SummaryEvidence is presented to support the hypothesis that communal roosts,
breeding colonies and certain other bird assemblages have been evolved primarily
for the efficient exploitation of unevenly‐distributed food sources by serving
as “information‐centres”.Predation‐pressure is regarded as being the most
important factor “shaping” the assemblages. The shaping involves the choice of
inaccessib...
DO TROPICAL BIRDS REAR AS MANY YOUNG AS THEY CAN NOURISH ?
Tập 91 Số 3 - Trang 430-455 - 1949
Summary. The thesis that birds lay clutches of eggs which will produce as many
nestlings as they can, on the average, adequately nourish, is considered in
relation to the Central American avifauna. Birds whose usual rate of bringing
food to the nest is slow can greatly augment this rate if, after an
exceptionally long period of neglect, they find their nestlings unusually hungry
(examples are give...
The recent declines of farmland bird populations in Britain: an appraisal of causal factors and conservation actions
Tập 146 Số 4 - Trang 579-600 - 2004
In this paper, the main aspects of agricultural intensification that have led to
population declines in farmland birds over the past 50 years are reviewed,
together with the current state of knowledge, and the effects of recent
conservation actions. For each of 30 declining species, attention is focused on:
(1) the external causes of population declines, (2) the demographic mechanisms
and (3) expe...
Assessing the impacts of wind farms on birds
Tập 148 Số s1 - Trang 29-42 - 2006
The potential effects of the proposed increase in wind energy developments on
birds are explored using information from studies of existing wind farms.
Evidence of the four main effects, collision, displacement due to disturbance,
barrier effects and habitat loss, is presented and discussed. The consequences
of such effects may be direct mortality or more subtle changes to condition and
breeding s...
FLOCKING AND FEEDING IN THE GREAT TIT PARUS MAJOR–AN EXPERIMENTAL STUDY
Tập 114 Số 4 - Trang 507-530 - 1972
SummarySome aviary experiments designed to investigate the survival value of
flocking in the Great Tit Parus major are described.An individual searching for
a source of food is less likely to find it if he is on his own or in a pair than
when in a flock of four. This is a result of local enhancement: with more pairs
of eyes searching, some member of the flock is likely to come across the food
soon...
SURVIVAL OF MANX SHEARWATERS PUFFINUS PUFFINUS
Tập 115 Số 4 - Trang 535-548 - 1973
SummaryThe breeding success of Manx Shearwaters at Skokholm Island,
Pembrokeshire, was followed in study burrows, and data on survival of the young
were augmented by ringing large numbers as they were about to leave the island
and recapturing them in later years.The weight of the young at fledging and the
date at which they leave affect their chances of survival; overall, as many as
30% of the you...
Effects of prey abundance on the foraging behaviour, diving efficiency and time allocation of breeding Guillemots Uria aalge
Tập 136 Số 2 - Trang 214-222 - 1994
The foraging behaviour of Guillemots Uria aalge at sea was compared between 2
years of radically different food abundance. Radio telemetry was used to
determine foraging locations and diving patterns. In the poor compared with the
good food year, foraging trips were much longer, the birds foraged more than six
times further from their breeding sites, they spent over five times as much time
diving ...
The influence of food supply on the breeding ecology of Kittiwakes Rissa tridactyla in Shetland
Tập 135 Số 3 - Trang 255-263 - 1993
We measured the breeding performance, body condition, time budgets and foraging
ranges of Kittiwakes Rissa tridactyla at Sumburgh Head, Shetland, in two years
of contrasting food availability. Kittiwakes in Shetland generally feed their
young almost entirely on sandeels, and fisheries data indicated that stocks of
sandeels in Shetland waters were at least ten times higher in 1991 than in 1990.
Fle...
Remote techniques for counting and estimating the number of bird–wind turbine collisions at sea: a review
Tập 148 Số s1 - Trang 76-89 - 2006
Since the early 1990s, marine wind farms have become a reality, with at least
13 000 offshore wind turbines currently proposed in European waters. There are
public concerns that these man‐made structures will have a significant negative
impact on the many bird populations migrating and wintering at sea. We assess
the degree of usefulness and the limitations of different remote technologies
for stu...
Swards and structure: the interactions between farming practices and bird food resources in lowland grasslands
Tập 146 Số s2 - Trang 108-114 - 2004
The ideal grassland to encourage plants and invertebrates suitable as food for
farmland birds contains a mixture of grasses and broad‐leaved plants with a
range of vegetation heights and structures. However, as a result of agricultural
intensification the majority of lowland grasslands in the UK now lack botanical
and structural complexity. Plants within intensively managed swards are allowed
litt...