Group size, but not manipulated whole-clutch egg color, contributes to ovicide in joint-nesting Smooth-billed Anis
| Autor: | Leanne A. Grieves, James S. Quinn |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Ecology biology media_common.quotation_subject Crotophaga ani Zoology biology.organism_classification 010603 evolutionary biology 01 natural sciences Competition (biology) 010605 ornithology Nest Cooperative breeding embryonic structures Hatching asynchrony Animal Science and Zoology Ecology Evolution Behavior and Systematics White layer media_common |
| Zdroj: | The Wilson Journal of Ornithology. 130:479-484 |
| ISSN: | 1938-5447 1559-4491 |
| DOI: | 10.1676/17-014.1 |
| Popis: | Reproductive competition in the form of ovicide is common in some joint-nesting birds, species in which multiple females lay eggs in a single nest. Joint-nesting Smooth-billed Anis (Crotophaga ani) often bury eggs under a new nest floor prior to laying their own eggs. Anis apparently cannot recognize their own eggs, which raises the question of how individuals can minimize their loss of young due to egg burial or consequences of hatching asynchrony. Newly laid eggs are coated with a white layer of vaterite (calcium) while older eggs may be almost entirely blue. Leaving older, bluer eggs in the nest presumably leads to a more competitive nest environment for the female's own young because newer eggs hatch later, producing smaller chicks at risk of getting trampled or bumped out of the nest. We hypothesized that Smooth-billed Anis use egg color as a cue for egg age. We predicted females not yet laying would bury older-looking blue eggs and tested this by removing the vaterite layer from all eggs in... |
| Databáze: | OpenAIRE |
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