Month to month changes in age ratio and brood size in Pink-footed Geese Anser brachyrhynchus in autumn

Pink-footed Goose (Anser brachyrhynchus) Science Article 7

abstract

The conservation and management of wild goose populations requires an accurate estimate of productivity to be made each year, usually soon after the birds’ arrival in the wintering grounds. The best time to make the estimates is not always clear, however, since the measures used may vary over the autumn. Seasonal variation in the percentage of juveniles and in mean brood size in Pink-footed Geese Anser brachyrhynchus were investigated, both in the UK as a whole and at one specific site. Data from 1994 to 2002, held by The Wildfowl & Wetlands Trust (WWT), were used to investigate national trends, while data from the Loch of Strathbeg, Aberdeenshire were used to test for variation at one site.

Patterson I.J. & Hearn R.D., ARDEA 94 (2): 175-183

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