Title:

Intraindividual seasonal decline of egg-volume in common tern Sterna hirundo

Subtitle:

Acta Ornithologica, vol. 34, no. 2 ; Spadek wielkości znoszonych jaj jako cecha osobnicza u rybitwy rzecznej ; Decline of egg volume in common tern

Creator:

González-Solís, Jacob ; Becker, Peter H. ; Jover, Lluis ; Ruiz, Xavier

Contributor:

Polska Akademia Nauk. Muzeum i Instytut Zoologii ; Meeting of the European Ornithologists' Union (2 ; 1999 ; Gdańsk)

Publisher:

Muzeum i Instytut Zoologii PAN

Place of publishing:

Warszawa

Date issued/created:

1999

Description:

Referat wygłoszony na Second Meeting of the European Ornithologists' Union ; Bibliogr. s. 189-190 ; S. [185]-190 : il. ; 27 cm ; Streszcz. pol.

Type of object:

Czasopismo/Artykuł

Subject and Keywords:

Rybitwa rzeczna -- jaja -- pomiar -- Niemcy Północne -- konferencje [KABA] ; różnice międzyosobnicze ; wybrzeże Morza Północnego ; rybitwy ; ptaki ; Sterna hirundo ; Sternidae ; Aves

Abstract:

The seasonal decline in egg-volume on the basis of the individual changes in 35 known-age female Common Terns Sterna hirundo was studied with data available for 3-6 years. Interindividual differences were significant for both laying dates and egg-volume. Thus, to examine whether the decline was an effect of an assortment of females with the timing of breeding according to their individual egg-volume, the individual values of laying date were correlated with egg-volume. Correlation was not significant, suggesting that seasonal decline in egg-volume was not due to interindividual differences. Instead, egg-volume showed a gradual decrease with the progress of the season at intraindividual level i.e. the later an individual female laid in the season the smaller was the egg-volume. Moreover, the seasonal decline in egg-volume was not due to a simultaneous increase in egg-volume with an advancement of the timing of breeding with age, since the rate of seasonal decrease in egg-volume was similar for young and old birds. Individual average of laying date accounted for 22% of the individual average of fledgling production whereas egg-volume was not significantly correlated with fledging production. Thus, it is suggested that seasonal decline in egg-volume is a non-adaptive consequence of physiological effect of condition on both timing of breeding and egg-volume.

Relation:

Acta Ornithologica

Volume:

34

Issue:

2

Start page:

185

End page:

190

Resource type:

Tekst

Detailed Resource Type:

Artykuł ; Materiały konferencyjne

Format:

application/pdf

Source:

MiIZ PAN, patrz sygn. czas. P.257, Vol. 34, No 2 ; MiIZ PAN, patrz sygn. czas. P.4568, Vol. 34, No 2 ; click here to follow the link

Language:

eng ; pol

Rights:

Prawa zastrzeżone - dostęp ograniczony

Terms of use:

Zasób chroniony prawem autorskim. Korzystanie dozwolone wyłącznie na terminalach Muzeum i Instytutu Zoologii PAN w zakresie określonym przez przepisy o dozwolonym użytku.

Digitizing institution:

Muzeum i Instytut Zoologii Polskiej Akademii Nauk

Original in:

Biblioteka Muzeum i Instytutu Zoologii PAN

Projects co-financed by:

Program Operacyjny Innowacyjna Gospodarka, lata 2010-2014, Priorytet 2. Infrastruktura strefy B + R ; Unia Europejska. Europejski Fundusz Rozwoju Regionalnego

Access:

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