Ornithological Results of the Transvaal Museum Namib Expedition May 1959, and the Subsequent Trip to Sandwich Harbour During January, 1960

Prozesky, O. P. M.

doi:10.1080/00306525.1963.9633816

Cited by 9 publications

(1 citation statement)

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“…The Sandwich Harbour mud flats are considered the most important component of this wetland because of the number of birds found there. The site's birds have been studied on an ad hoc basis since 1959 (Prozesky 1963), and regular bird counts of the northern freshwater wetland (Berry & Berry 1975) were followed by surveys of the entire wetland since 1990 (see Simmons [1991] for methods).…”

Section: Introductionmentioning

confidence: 99%

Declines in migrant shorebird populations from a winter-quarter perspective

Simmons

Kolberg

Braby

et al. 2015

Conservation Biology

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Many long-distance migrating shorebird (i.e., sandpipers, plovers, flamingos, oystercatchers) populations are declining. Although regular shorebird monitoring programs exist worldwide, most estimates of shorebird population trends and sizes are poor or nonexistent. We built a state-space model to estimate shorebird population trends. Compared with more commonly used methods of trend estimation, state-space models are more mechanistic, allow for the separation of observation and state process, and can easily accommodate multivariate time series and nonlinear trends. We fitted the model to count data collected from 1990 to 2013 on 18 common shorebirds at the 2 largest coastal wetlands in southern Africa, Sandwich Harbour (a relatively pristine bay) and Walvis Bay (an international harbor), Namibia. Four of the 12 long-distance migrant species declined since 1990: Ruddy Turnstone (Arenaria interpres), Little Stint (Calidris minuta), Common Ringed Plover (Charadrius hiaticula), and Red Knot (Calidris canutus). Populations of resident species and short-distance migrants increased or were stable. Similar patterns at a key South African wetland suggest that shorebird populations migrating to southern Africa are declining in line with the global decline, but local conditions in southern Africa's largest wetlands are not contributing to these declines. State-space models provide estimates of population levels and trends and could be used widely to improve the current state of water bird estimates.

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Section: Introductionmentioning

confidence: 99%