![]() NGC index of bag density (blue) and BBS index of abundance (red), from 1995 to 2009. Below, the UK trend from the NGC is compared to the one from the BBS (from 1995 onwards). Since 1995, data on fox abundance have been collected under the Breeding Bird Survey (BBS) organised by the British Trust for Ornithology. * significant at P < 0.05 Comparison with BBS mammal data There are too few bag records of fox to evaluate rates of change over time CountryĬhange in fox bags over time, with 95% confidence limits (see statistical methods): Environmental zone There are too few bag records of fox to produce an index graph. ![]() The reason for the recent decline is unknown. The widespread rearing and releasing of gamebirds has probably improved fox food supply in autumn and winter. Changes in fox control methods, including the use of spotlights for night shooting and the banning of Cymag poison, have undoubtedly affected the size of the cull. Fox density may have been depressed following the disappearance of their rabbit prey due to myxomatosis in the 1950s, and part of the increase may reflect the subsequent rabbit recovery. The bag index more than doubled between 19, then declined significantly from 1995 to 2009. There has been a continuous increase in the bag index since 1961, leading to it being more than three times higher in 2009 than in 1961. The widespread rearing and releasing of gamebirds has probably improved fox food supply in autumn and winter.Ĭhange in fox bags over time, with 95% confidence limits (see statistical methods): Country Overall the bag index has tripled between 19. There has been a continuous increase in the bag index, particularly between 1961 and the early 1990s. To learn more about how and for what purposes Amazon uses personal information (such as Amazon Store order history), please visit our Privacy Notice.Index of bag density from 1961 to 2009 (see statistical methods and interpretational considerations).Įrror bars represent 95% confidence intervals. You can change your choices at any time by visiting Cookie Preferences, as described in the Cookie Notice. Click ‘Customise Cookies’ to decline these cookies, make more detailed choices, or learn more. Third parties use cookies for their purposes of displaying and measuring personalised ads, generating audience insights, and developing and improving products. This includes using first- and third-party cookies, which store or access standard device information such as a unique identifier. If you agree, we’ll also use cookies to complement your shopping experience across the Amazon stores as described in our Cookie Notice. ![]() We also use these cookies to understand how customers use our services (for example, by measuring site visits) so we can make improvements. We use cookies and similar tools that are necessary to enable you to make purchases, to enhance your shopping experiences and to provide our services, as detailed in our Cookie Notice.
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