Female European Coots (Fulica atra) typically lay clutches of seven to eight, in which egg mass increases through the laying sequence. The proportions of yolk and albunmen do not change with egg mass, and hatchling mass is proportional to egg mass. Hatching is asynchronous, and laterhatced chicks often starve or die from exposure. These breeding characteristics are proposed to be related to the exploitation of a food supply showing both long— and short—term unpredictability in abundance. The higher mass of the later chicks within a brood may allow them to survive long enough to exploit any sudden increases in food abundance at little parental cost. Experimental manipulation of food supply during the prelaying period shows that this systematic variation in mass within a clutch may be due to a facultative response in females; individuals fed upon an extremely constant daily food supply laid less variable clutches than females exposed to the natural food supply. The function and mechanism of this response are discussed.
Egg Mass Short Term Unpredictability Egg Mass Variation Food Supply Proportions Of Yolk Fulica Atra Response In Females Breeding Characteristics Mass Variation Food Abundance
AI-powered Research feed
Introducing Weekly Round-ups!Beta
Round-ups are the summaries of handpicked papers around trending topics published every week. These would enable you to scan through a collection of papers and decide if the paper is relevant to you before actually investing time into reading it.
Climate change Research Articles published between Jan 23, 2023 to Jan 29, 2023
Jan 30, 2023
Articles Included: 3
Climate change adaptation has shifted from a single-dimension to an integrative approach that aligns with vulnerability and resilience concepts. Adapt...Read More
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on “as is” basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The Copyright Law.