::: Welcome to Conservation Genome Resource Bank for Korean Wildlife :::

보전유전학/보전생물학 자료

View Article

Name

운영자

2005-05-31 20:23:05 | Hit : 31851 | Vote : 12117

Subject

[자료] THE EVOLUTION OF REVERSED SEXUAL DIMORPHISM IN OWLS: AN EMPIRICAL ANALYSIS OF POSSIBLE SELECTIVE FACTORS

Wilson Bull., 98(3), 1986, pp. 387-406

THE EVOLUTION OF REVERSED SEXUAL DIMORPHISM IN OWLS: AN EMPIRICAL ANALYSIS OF POSSIBLE SELECTIVE FACTORS

HELMUT C. MUELLER’

ABSTRACT

NO less than 20 hypotheses have been proposed to explain reversed sexual
dimorphism (RSD) in raptorial birds. I have generated a prediction from each of these
hypotheses and tested the prediction using the available information and nonparametric
statistics. RSD correlates significantly only with female dominance in intraspecies interac-
tions and with prey type. Unfortunately, the data on dominance interactions are limited,
but the best working hypothesis appears to be that RSD has evolved primarily as a result
of epigamic selection, with female dominance facilitating pair formation and maintenance.
Prey specialization appears merely to influence the degree of, and does not cause, RSD.
Most species of owls are specialists on either invertebrates or small mammals. Specialists
on invertebrates show little RSD and specialists on small mammals show moderate to high

RSD. Received 22 Feb. 1985, accepted 31 Jan. 1986.

Prev	[자료] The evolution of plumage polymorphism in birds of prey and owls:	운영자	2005/05/31

Next	[자료] When does conservation genetics matter?	운영자	2005/05/23