Increased eggshell porosity in replacement clutches of the Black-headed Gull Larus ridibundus
Water vapour permeability, pore density and thickness of the eggshells from initial and replacement clutches of the Black-headed Gull (Larus ridibundus) were measured and compared. The permeability of the eggshells of replacement clutches was, on average, higher than that of either the corresponding...
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BirdLife Finland
1996
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fttsvojs:oai:journal.fi:article/133446 2023-09-05T13:24:02+02:00 Increased eggshell porosity in replacement clutches of the Black-headed Gull Larus ridibundus Mänd, R. 1996-09-30 application/pdf https://ornisfennica.journal.fi/article/view/133446 eng eng BirdLife Finland https://ornisfennica.journal.fi/article/view/133446/81992 https://ornisfennica.journal.fi/article/view/133446 Ornis Fennica; Vol 73 Nro 3 (1996); 131–136 Ornis Fennica; Vol. 73 No. 3 (1996); 131–136 0030-5685 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article 1996 fttsvojs 2023-08-23T23:02:47Z Water vapour permeability, pore density and thickness of the eggshells from initial and replacement clutches of the Black-headed Gull (Larus ridibundus) were measured and compared. The permeability of the eggshells of replacement clutches was, on average, higher than that of either the corresponding initial clutches or the control sample of late initial clutches initiated during the same period as replacement clutches . Thus, the difference cannot be explained merely on the basis of any seasonal trend. The difference was caused by the higher number of pores and not by the thinner shells of the replacement eggs. Eggshell porosity increased during the first days of incubation . Changes in eggshell porosity can probably serve as an early signal of changing environmental properties affecting eggshell quality. Article in Journal/Newspaper Black-headed Gull Larus ridibundus Federation of Finnish Learned Societies: Scientific Journals Online |
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Open Polar |
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Federation of Finnish Learned Societies: Scientific Journals Online |
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fttsvojs |
language |
English |
description |
Water vapour permeability, pore density and thickness of the eggshells from initial and replacement clutches of the Black-headed Gull (Larus ridibundus) were measured and compared. The permeability of the eggshells of replacement clutches was, on average, higher than that of either the corresponding initial clutches or the control sample of late initial clutches initiated during the same period as replacement clutches . Thus, the difference cannot be explained merely on the basis of any seasonal trend. The difference was caused by the higher number of pores and not by the thinner shells of the replacement eggs. Eggshell porosity increased during the first days of incubation . Changes in eggshell porosity can probably serve as an early signal of changing environmental properties affecting eggshell quality. |
format |
Article in Journal/Newspaper |
author |
Mänd, R. |
spellingShingle |
Mänd, R. Increased eggshell porosity in replacement clutches of the Black-headed Gull Larus ridibundus |
author_facet |
Mänd, R. |
author_sort |
Mänd, R. |
title |
Increased eggshell porosity in replacement clutches of the Black-headed Gull Larus ridibundus |
title_short |
Increased eggshell porosity in replacement clutches of the Black-headed Gull Larus ridibundus |
title_full |
Increased eggshell porosity in replacement clutches of the Black-headed Gull Larus ridibundus |
title_fullStr |
Increased eggshell porosity in replacement clutches of the Black-headed Gull Larus ridibundus |
title_full_unstemmed |
Increased eggshell porosity in replacement clutches of the Black-headed Gull Larus ridibundus |
title_sort |
increased eggshell porosity in replacement clutches of the black-headed gull larus ridibundus |
publisher |
BirdLife Finland |
publishDate |
1996 |
url |
https://ornisfennica.journal.fi/article/view/133446 |
genre |
Black-headed Gull Larus ridibundus |
genre_facet |
Black-headed Gull Larus ridibundus |
op_source |
Ornis Fennica; Vol 73 Nro 3 (1996); 131–136 Ornis Fennica; Vol. 73 No. 3 (1996); 131–136 0030-5685 |
op_relation |
https://ornisfennica.journal.fi/article/view/133446/81992 https://ornisfennica.journal.fi/article/view/133446 |
_version_ |
1776204607645548544 |