Scharlemann_2003_Long_term_declines_in_eggshell_thickness_Ardea.pdf (343.78 kB)
Long-term declines in eggshell thickness of dutch thrushes Turdus spp.
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posted on 2023-06-08, 13:43 authored by J P W ScharlemannThe thickness of the eggshells of Blackbird Turdus merula, Song Thrush T. philomelos, Mistle Thrush T. viscivorus, and Ring Ouzel T. torquatus has previously been shown to have declined in Britain based upon measurements of eggshells in museum collections. A study of eggs of three of the same species collected in the Netherlands shows evidence of a decline in eggshell thickness of similar magnitude to that found in Britain for these species. This is the first time that eggshell thickness declines of such long duration have been found in two geographically separate areas. The cause of the decline is unknown, but began before the introduction of organochlorine pesticides.
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- Published
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- Published version
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ArdeaISSN
0373-2266Issue
2Volume
91Page range
205-211Department affiliated with
- Evolution, Behaviour and Environment Publications
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- Yes
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- Yes
Legacy Posted Date
2012-11-16First Open Access (FOA) Date
2012-11-16First Compliant Deposit (FCD) Date
2012-11-15Usage metrics
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