About: Should males come first? The relationship between offspring hatching order and sex in the black-headed gull Larus ridibundus

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About: Should males come first? The relationship between offspring hatching order and sex in the black-headed gull Larus ridibundus Goto Sponge NotDistinct Permalink

An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	In birds with hatching asynchrony and sexual size dimorphism, chicks hatched earlier and later in the laying sequence usually suffer different mortalities due to uneven abilities to compete for food, especially in poor years. If sexes differ in vulnerability to environmental conditions, e.g., by having different food equirements due to differential growth rates, mothers can increase fitness by allocating sex according to the laying order, producing less vulnerable sex later rather than early in the clutch. By analysing variation in primary sex ratio using a PCR-based DNA technique, we tested this prediction in black-headed gull Larus ridibundus chicks where males may be the less viable sex under adverse conditions. The overall primary sex ratio of the population did not depart from parity. However, first hatched chicks were more likely to be males whereas last hatched chicks were more likely to be females. Both egg volume and hatchling body mass decreased with laying order irrespective of sex. Time of In birds with hatching asynchrony and sexual size dimorphism, chicks hatched earlier and later in the laying sequence usually suffer different mortalities due to uneven abilities to compete for food, especially in poor years. If sexes differ in vulnerability to environmental conditions, e.g., by having different food equirements due to differential growth rates, mothers can increase fitness by allocating sex according to the laying order, producing less vulnerable sex later rather than early in the clutch. By analysing variation in primary sex ratio using a PCR-based DNA technique, we tested this prediction in black-headed gull Larus ridibundus chicks where males may be the less viable sex under adverse conditions. The overall primary sex ratio of the population did not depart from parity. However, first hatched chicks were more likely to be males whereas last hatched chicks were more likely to be females. Both egg volume and hatchling body mass decreased with laying order irrespective of sex. Time of (en)
Title	Should males come first? The relationship between offspring hatching order and sex in the black-headed gull Larus ridibundus Should males come first? The relationship between offspring hatching order and sex in the black-headed gull Larus ridibundus (en)
skos:prefLabel	Should males come first? The relationship between offspring hatching order and sex in the black-headed gull Larus ridibundus Should males come first? The relationship between offspring hatching order and sex in the black-headed gull Larus ridibundus (en)
skos:notation	RIV/61989592:15310/05:00010330!RIV10-MSM-15310___
http://linked.open...avai/riv/aktivita	P S Z
http://linked.open...avai/riv/aktivity	P(GD206/05/H012), S, Z(AV0Z60930519), Z(MSM 123100003), Z(MSM6007665801), Z(MSM6198959212)
http://linked.open...iv/cisloPeriodika	6
http://linked.open...vai/riv/dodaniDat	2010
http://linked.open...aciTvurceVysledku	Tkadlec, Emil
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Univerzita Palackého v Olomouci / Přírodovědecká fakulta
http://linked.open...dnocenehoVysledku	542560
http://linked.open...ai/riv/idVysledku	RIV/61989592:15310/05:00010330
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	offspring sex ratio; hatching asymetry (en)
http://linked.open.../riv/klicoveSlovo	offspring sex ratio hatching asymetry
http://linked.open...odStatuVydavatele	DK - Dánské království
http://linked.open...ontrolniKodProRIV	[CF6DFF5008D4]
http://linked.open...i/riv/nazevZdroje	Journal of Avian Biology
http://linked.open...in/vavai/riv/obor	EH
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	Integration of ethological, physiological and behavioural ecological approaches to animal behaviour
http://linked.open...UplatneniVysledku	2005
http://linked.open...v/svazekPeriodika	36
http://linked.open...iv/tvurceVysledku	Honza, Marcel Tkadlec, Emil Oborník, Miroslav Šimek, Jaroslav Ležalová, Radka
http://linked.open...n/vavai/riv/zamer	Biodiverzita a ekologie obratlovců: Strategie ochrany a využívání přírodních populací EKOLOGICKÉ, EVOLUČNÍ A EXPERIMENTÁLNĚ BIOLOGICKÉ PŘÍSTUPY KE STUDIU VZNIKU A VÝZNAMU BIODIVERZITY Life-history strategies of animals: proximate and ultimate mechanisms http://linked.opendata.cz/resource/domain/vavai/zamer/MSM%20123100003
issn	0908-8857
number of pages	6 (xsd:int)
http://localhost/t...ganizacniJednotka	15310
is http://linked.open...avai/riv/vysledek of	Should males come first? The relationship between offspring hatching order and sex in the black-headed gull Larus ridibundus

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