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black sea red data book - Department of Biology

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small molluscs and copepods along the shore-line. Large invertebrates comprise their<br />

basic food in agricultural lands.<br />

Population trends. A slight decrease has been recorded, though in some sub-regions<br />

their numbers have remained stable across the last two decades.<br />

Threats. Low breeding numbers and the vulnerability <strong>of</strong> the habitats pose a clear risk<br />

for the Black Sea Haematopus ostralegus population. Recreation development, sand<br />

extraction at the <strong>sea</strong>side and in the estuaries, constant human disturbance and<br />

prédation may destroy its relative population stability in future.<br />

Conservation measures taken. Creation <strong>of</strong> the Sivash and Azov Sea National Parks<br />

System, which will greatly contribute to species protection in the region.<br />

Conservation measures proposed. None.<br />

References<br />

Siokhin, V. D., I..I. Chernichko & T.B. Ardamatskaia et al, 1988. Colonial<br />

Hydrophilic Birds <strong>of</strong> the South <strong>of</strong> Ukraine: Charadriformes. Kiev, Naukova Dumka:<br />

176 pp. (in Russian).<br />

Red Data Book <strong>of</strong> Ukraine, 1994. 348 pp.<br />

Compiled by J. Chernichko.<br />

223

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