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首页> 外文期刊>Bird Study >The breeding status of Peregrine Falcons Falco peregrinus in the UK and Isle of Man in 2002
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The breeding status of Peregrine Falcons Falco peregrinus in the UK and Isle of Man in 2002

机译：2002年在英国和马恩岛的游F猎鹰的游al状况

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Capsule Numbers of breeding Peregrines are now higher than ever recorded and the recovery of the species within the UK has continued since 1991.Aims To estimate the current Peregrine breeding population and its changes over time by recording breeding evidence and nesting range occupancy at known and potential Peregrine eyries.Methods Attempts were made to check all potentially suitable Peregrine nesting locations for signs of Peregrine occupation. Causes of nest failure were documented where possible. Estimates of occupancy of nesting ranges that could not be visited were based on the proportion of ranges occupied from visited nesting ranges in the same region.Results In 2002, 1530 Peregrine nesting ranges were estimated to be occupied, comprising 1456 pairs or single birds confirmed as in occupation, and 74 estimated extras (5% of total occupied nesting ranges) that were not visited. Including non-breeding singletons holding nesting ranges, the UK and Isle of Man figure of 'Ratcliffe pairs' was 1437. This showed a 12% increase from 1991 and a 64% increase from the 1930s. However, there were geographical differences in change, with rapid expansion in the south of England tempered by declines in northern Scotland.Conclusions The primary reasons for the population increase is primarily because of range expansion driven by a plentiful food supply and perhaps an increased tolerance of human disturbance. In areas where the species has declined, various factors (separately or in combination) including reduced food supply and persecution are likely to be involved.
机译：自1991年以来，英国繁殖物种的荚膜数量比以往任何时候都高，并且该物种的恢复仍在继续。目的通过记录已知和潜在的繁殖证据和筑巢范围的占有率来估算当前的Peregrine繁殖种群及其随时间的变化。方法试图检查所有可能合适的百灵鸟筑巢位置，以发现百灵鸟被占领的迹象。尽可能记录嵌套失败的原因。无法访问的筑巢区域的占有率估计是基于同一区域中访问过的筑巢区域所占范围的比例。结果2002年，估计有1530个游eg筑巢区域被占用，包括1456对或单只鸟类被确认为占用了约74个额外区域（占嵌套巢总数的5％）。包括持有嵌套范围的非繁殖单身人士在内，英国和马恩岛的“ Ratcliffe对”数字为1437。这比1991年增加了12％，比1930年代增加了64％。然而，变化存在地域差异，英格兰南部的快速扩张受到苏格兰北部的衰退的抑制。结论人口增长的主要原因主要是由于充足的粮食供应驱动的范围扩大，也许是由于人们对食物的耐受力增强。人为干扰。在物种减少的地区，可能涉及各种因素（单独或合并），包括粮食供应减少和迫害。

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