LOGIN TO YOUR ACCOUNT

Username
Password
Remember Me
Or use your Academic/Social account:

CREATE AN ACCOUNT

Or use your Academic/Social account:

Congratulations!

You have just completed your registration at OpenAire.

Before you can login to the site, you will need to activate your account. An e-mail will be sent to you with the proper instructions.

Important!

Please note that this site is currently undergoing Beta testing.
Any new content you create is not guaranteed to be present to the final version of the site upon release.

Thank you for your patience,
OpenAire Dev Team.

Close This Message

CREATE AN ACCOUNT

Name:
Username:
Password:
Verify Password:
E-mail:
Verify E-mail:
*All Fields Are Required.
Please Verify You Are Human:
fbtwitterlinkedinvimeoflicker grey 14rssslideshare1
Languages: English
Types: Article
Subjects: QL0671, AM, QH0540
The 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.
  • The results below are discovered through our pilot algorithms. Let us know how we are doing!

    • Anderson D.W. & JJ. Hickey. 1972. Eggshell changes in certain North American birds. In: KR. Voous (ed.) Proc. 15th Intern. Om. Congr.: 514-540. El. Brill, Leiden.
    • Eeva T. & E. Lehikoinen. 1995. Egg shell quality, clutch size and hatching success of the Great Tit (Parus major) and the pied flycatcher (Ficedula hypoleuca) in an air pollution gradient. Oecologia 102: 312-323.
    • Graveland 1. & AE. Berends. 1997. Timing of the calcium intake and effect of calcium deficiency on behaviour and egg laying in captive Great Tits, Parus major. Physio1. Z001. 70: 74-84.
    • Graveland J. & R. van der Wal. 1996. Decline in snail abundance due to soil acidification causes eggshell defects in forest passerines. Oecologia 105: 351-360.
    • Graveland J., R. van der WaI, JR. van Balen & Al. van Noordwijk. 1994. Poor reproduction in forest passerines from decline of snail abundance on acidified soils. Nature 368: 446-448.
    • Green R.E. 1998. Long-term decline in the thickness of eggshells of thrushes, Turdus spp., in Britain. Proc. Roy. Soc. Lond. B BioI. Sci. 265: 679-684.
    • Green RE. 2000. An evaluation of three indices of eggshell thickness. Ibis 142: 676-679.
    • Hoyt DF. 1979. Practical methods of estimating volume and fresh weight of bird eggs. Auk 96: 73-79.
    • Newton I. 1979. Population ecology of raptors. T. & AD. Poyser, Berkhamsted.
    • Nyblil S., M. Staumes & K. Jerstad. 1997. Thinner eggshells of Dipper (Cinelus cinelus) eggs from an acidified area compared to a non-acidified area in Norway. Water, Air, and Soil Pollut. 93: 255-266.
    • Nyholm N El. 1981. Evidence of involvement of aluminium in causation of defective formation of eggshells and of impaired breeding in wild passerine birds. Bov. Res. 26: 363-371.
    • Ormerod Sl., K.R. Bull, C.P. Cummins, Sl. Tyler & JAo Vickery. 1988. Egg mass and shell thickness in Dippers Cinelus cinclus in relation to stream acidity in Wales and Scotland. Environ. Poll. 55: 107-121.
    • Posch M., PAM. de Smet, J.-P. Hettelingh & Rl. Downing (ed.) 1999.Calculation and mapping of critical thresholds in Europe: status report 1999. RIVM, National Institute of Public Health and the Environment, Bilthoven, The Netberlands.
    • Ramsay SL. & D.C. Houston. 1999. Do acid rain and calcium supply limit eggshell formation for Blue Tits (Parus caeruleus) in the UK? J. Zooi. Lond. 247: 121-125.
    • Ratcliffe DA. 1970. Changes attributable to pesticides in egg breakage frequency and eggshell thickness in some British birds. 1. App1. Eco1.17: 67-107.
    • Received 28 November 2000; accepted 15 October 2003
  • No related research data.
  • No similar publications.

Share - Bookmark

Download from

Cite this article