EFFECTS OF EXPERIMENTAL EGG COMPOSITION ON REJECTION BY VILLAGE WEAVERS (PLOCEUS CUCULLATUS)

Autor:	James W. Wiley, Alexander Cruz, John W. Prather, Pablo F. Weaver
Rok vydání:	2007
Předmět:	Cowbird Ecology Nest Ploceus cucullatus embryonic structures Zoology Animal Science and Zoology Composition (visual arts) Biology Acrylic paint biology.organism_classification Ecology Evolution Behavior and Systematics
Zdroj:	The Wilson Journal of Ornithology. 119:703-711
ISSN:	1938-5447 1559-4491
DOI:	10.1676/06-123.1
Popis:	We experimentally parasitized nests of the Village Weaver (Ploceus cucullatus) in Hispaniola using real and artificial eggs made from wood and modeling clay. Artificial eggs were similar in size and shape to real weaver eggs and were coated with acrylic paint and glazed. Real eggs were actual weaver eggs taken from Village Weaver nests. Experimental parasitic eggs (1) mimicked natural weaver eggs, (2) differed in color only, (3) differed in spotting only, or (4) mimicked Shiny Cowbird (Molothrus bonariensis) egg color and spotting pattern. Parasitized nests were checked after 2–6 days. Real eggs were ejected from weaver nests with increasing frequency as they became less similar to the eggs in the nest with cowbirds eggs having the highest rejection (81%). However, for artificial egg types there were no significant within-composition differences in patterns of rejection. Clay eggs were usually ejected from the nests, whereas nests containing wood eggs often ended empty, or with only the artificia...
Databáze:	OpenAIRE
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