TERRITORIALITY VERSUS FLOCKING IN THE ZENAIDA DOVE (ZENAIDA AURITA): RESOURCE POLYMORPHISM REVISITED USING MORPHOLOGICAL AND GENETIC ANALYSES.

The article presents the results of the study on Zenaida Doves in Barbados to establish resource polymorphism or existence of alternative phenotypes in relation to resource use as a result of disruptive selection. It confirms that territorial adult doves were larger than flock-feeding ones and the reverse condition occurs among their juveniles. The article concludes that caution should be exerted when referring to well-defined ecological concepts such as resource polymorphism to interpret intrapopulation variation in foraging strategy.