Female-Female Pairing in Ring-Billed Gulls

Autor:	John P. Ryder, Patricia Lynn Somppi
Rok vydání:	1979
Předmět:	Stereochemistry Pairing embryonic structures Animal Science and Zoology Biology Ring (chemistry) reproductive and urinary physiology Ecology Evolution Behavior and Systematics
Zdroj:	The Auk. 96:1-5
ISSN:	1938-4254 0004-8038
DOI:	10.1093/auk/96.1.1
Popis:	Female-female pairs of Ring-billed Gulls (Larus delawarensis) were recorded attending supernormal clutches (5-8 eggs) on Granite Island, northern Lake Superior in 1978. Female-female pairs complete their clutches usually before the peak of egg-laying in the colony. Supernormal clutches completed after the peak are thought to result from egg-dumping by several unpaired females. Compared to normal 3-egg clutches, laid early in the season, the average hatching success of supernormal clutches was lower (8-20% vs 80-90%) and over 50% of the embryos showed depressed growth and development. Although the phenomenon of homosexual pairing is likely not recent in Ring-billed Gulls, as compared to the situation in Western Gulls, the adaptive significance of such pairs is currently unknown.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::886d06e29af54d9262a3a7a51756f08a https://doi.org/10.1093/auk/96.1.1 Zobrazit plný text záznamu