Please cite this article in press as: Fisher, H. Animal Behaviour (2009), doi:10.1016/j.anbe Mate choice represents the outcome of a complex decision that is most often based on the integration of information on multiple traits expressed by potential mates. Multiple traits, however, can show phenotypic correlations, which may coincide with, or oppose, female preference for individual traits. Th...

In previous papers in this series (5, 8, I3) it has been shown that spontaneous malignant melanomas are produced in the hybrid offspring of the black-spotted platyfish, Platypoecilus maculatus, and the swordtail, Xiphophorus hdlerii. The melanomas are evoked genetically in hybrids by the interaction of the sexlinked, heritable factor for macromelanophores, Sp, of the platyfish with a series of ...

The X and Y chromosomes of the platyfish (Xiphophorus maculatus) contain a region that encodes several important traits, including the determination of sex, pigment pattern formation, and predisposition to develop malignant melanoma. Several sex-chromosomal crossovers were identified in this region. As the melanoma-inducing oncogene Xmrk is the only molecularly identified constituent, its genom...

In natural populations of platyfish, Xiphophorus maculatus, there are three sex chromosomes--W, X, and Y. Females may have one of three genotypes: WY, WX, or XX, and males may have either XY or YY. The W chromosome can be considered a modified X that blocks the male-determining function of the Y. The platyfish may represent an evolutionary stage at which female heterogamety arises through a sin...

Six commonly freshwater ornamental fish, namely Poecilia rediculata (guppy); Poecilia sphenops (black molly); Cichlosoma sp. (Cichlidae); Xiphophorus maculatus (platy); Carassius auratus (goldfish) and Symphisodon discus (discus) were examined for parasites during a four years study (19982002) in Turkey. The parasites species found included: Ichthyobodo sp., Ichthyophthirius multifiliis, Chilod...

It is widely expected that physiological and behavioral stress responses will be integrated within divergent stress-coping styles (SCS) and that these may represent opposite ends of a continuously varying reactive-proactive axis. If such a model is valid, then stress response traits should be repeatable and physiological and behavioral responses should also change in an integrated manner along ...