Ibis
SCIE-ISI SCOPUS (1859-2023)
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
Các bài báo tiêu biểu
THE IMPORTANCE OF CERTAIN ASSEMBLAGES OF BIRDS AS “INFORMATION‐CENTRES” FOR FOOD‐FINDINGSummary Evidence 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 assembla... ...
Tập 115 Số 4 - Trang 517-534 - 1973
DO TROPICAL BIRDS REAR AS MANY YOUNG AS THEY CAN NOURISH ?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 s... ...
Tập 91 Số 3 - Trang 430-455 - 1949
The recent declines of farmland bird populations in Britain: an appraisal of causal factors and conservation actionsIn 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 ... ...
Tập 146 Số 4 - Trang 579-600 - 2004
Assessing the impacts of wind farms on birdsThe 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 br... ...
Tập 148 Số s1 - Trang 29-42 - 2006
FLOCKING AND FEEDING IN THE GREAT TIT PARUS MAJOR–AN EXPERIMENTAL STUDYSummary Some 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 o... ...
Tập 114 Số 4 - Trang 507-530 - 1972
SURVIVAL OF MANX SHEARWATERS PUFFINUS PUFFINUSSummary The 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 chanc... ...
Tập 115 Số 4 - Trang 535-548 - 1973
Effects of prey abundance on the foraging behaviour, diving efficiency and time allocation of breeding Guillemots Uria aalgeThe 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 o... ...
Tập 136 Số 2 - Trang 214-222 - 1994
The influence of food supply on the breeding ecology of Kittiwakes Rissa tridactyla in ShetlandWe 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 tim... ...
Tập 135 Số 3 - Trang 255-263 - 1993
Remote techniques for counting and estimating the number of bird–wind turbine collisions at sea: a reviewSince 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... ...
Tập 148 Số s1 - Trang 76-89 - 2006
Swards and structure: the interactions between farming practices and bird food resources in lowland grasslandsThe 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 allo... ...
Tập 146 Số s2 - Trang 108-114 - 2004