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Avian sibling cannibalism: Hoopoe mothers regularly use their last hatched nestlings to feed older siblings

Zoological Research 2022年第2期43卷 265-274页

作者： Juan JoseSoler Manuel Martin-Vivaldi Sona nuhlickova Cristina Ruiz-Castellano Monica Mazorra-Alonso Ester Martinez-Renau Manfred Eckenfellner Jan svetlik Herbert Hoi Departamento de Ecologia Funcional y Evolutiva Estacion Experimental de Zonas Aridas(EEZA-CSIC)Almeria E-04120Spain Unidad Asociada Coevolucion:Cucos Hospedadores y Bacterias SimbiontesUniversidad de GranadaGranada E-18003Spain Departamento de Zoologia Facultad de CienciasUniversidad de GranadaGranada E-18003Spain Department of Ecology Faculty of Natural SciencesComenius UniversityBratislava SK-84215Slovakia Konrad Lorenz Institute of Ethology Department of Interdisciplinary Life SciencesUniversity of Veterinary MedicineVienna A-1160Austria

Sibling cannibalism is relatively common in nature,but its evolution in birds and certain other vertebrates with extended parental care had been ***,however,we demonstrate its regular occurrence in two European populations of the Eurasian hoopoe(Upupa epops)and explore possible adaptive and non-adaptive *** showed that sibling cannibalism was more frequently detected in Spain(51.7%)than in Austria(5.9%).In these two populations,the hoopoes laid similar clutch sizes,resulting in similar fledging production,but hatching failures were more frequent in the northern ***,having more nestlings condemned to die in the southern population may explain the higher incidence of sibling *** accordance with this interpretation,hatching span and failure,but not breeding date,explained the probability of sibling cannibalism in the Spanish hoopoes,while all three variables predicted brood reduction ***,experimental food supply reduced the probability of sibling cannibalism,but not the intensity of brood ***,females allocated fewer resources to the smallest nestlings when they were going to starve,but not necessarily when they were going to be used as food for their *** results suggest that hoopoes produce extra eggs that,in the case of reduced hatching failure and food scarcity,produce nestlings that are used to feed older *** findings provide the first evidence that sibling cannibalism occurs regularly in a bird species,thus expanding our evolutionary understanding of clutch size,hatching asynchrony,parent-offspring conflict,infanticide,and sibling cannibalism in the animal kingdom.

关键词： Brood reduction Clutch size Hatching asynchrony Ice-box hypothesis Infanticide Siblicide Sibling hierarchy Upupa epops

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