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Estimating prey accessibility for waders : a problem still to be solved

journal contribution
posted on 2001-12-01, 00:00 authored by Jutta Leyrer, K M Exo
Estimating the accessible prey fraction for short-billed waders, we used a new sampling device - the sediment- plane( Desholme t al. 1998) - to record prey density of the uppermost benthos communities in softbottom habitats. In contrast to "ordinary"core-samplers, the sediment plane allows a relatively quick sampling of the uppermost layers of the sediment and, thus, it should allow a more reliable estimate of the accessible benthos community especially of vertically mobile prey organisms such as polychaetes. To assess its usefulness, we compared samples collected with the sediment-plane that took only the uppermost 3cm of the sediment with samples taken with a core-sampler. These investigations showed significant differences between the two sampling methods. In comparison with the corresponding layer of the core samples, we found significantly higher numbers and a higher biomass for at least four polychaete species (e.g. Ragworm Nereis diversicolor) in the plane samples.Therefore, we recommend the use of the sediment-plane when studying the accessible fraction for foraging waders especially when studying short-billed species.

History

Journal

Wader study group bulletin

Volume

96

Pagination

60 - 63

Publisher

National Centre for Ornithology, International Wader Study Group

Location

Norfolk, England

ISSN

0260-3799

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

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