Karen P Maruska
Affiliation: Stanford University
Maruska K, Fernald R. Steroid receptor expression in the fish inner ear varies with sex, social status, and reproductive state. BMC Neurosci. 2010;11:58 pubmed publisher
..Our data suggest that changes in steroid receptor mRNA expression in the inner ear could be a regulatory mechanism for physiological state-dependent auditory plasticity across vertebrates. ..
Maruska K, Fernald R. Reproductive status regulates expression of sex steroid and GnRH receptors in the olfactory bulb. Behav Brain Res. 2010;213:208-17 pubmed publisher
Maruska K, Carpenter R, Fernald R. Characterization of cell proliferation throughout the brain of the African cichlid fish Astatotilapia burtoni and its regulation by social status. J Comp Neurol. 2012;520:3471-91 pubmed publisher
..These results suggest that A. burtoni will be a useful model to analyze the mechanisms of socially induced neurogenesis in vertebrates. ..
Maruska K, Fernald R. Behavioral and physiological plasticity: rapid changes during social ascent in an African cichlid fish. Horm Behav. 2010;58:230-40 pubmed publisher
..burtoni suggests that perception of social opportunity triggers a suite of quick changes to facilitate rapid transition towards reproductive success, and reveals important features of social ascent not previously recognized...
Maruska K, Levavi Sivan B, Biran J, Fernald R. Plasticity of the reproductive axis caused by social status change in an african cichlid fish: I. Pituitary gonadotropins. Endocrinology. 2011;152:281-90 pubmed publisher
..Our results show that the pituitary is stimulated extremely rapidly after perception of social opportunity, probably to allow suppressed males to quickly achieve reproductive success in a dynamic social environment. ..
Maruska K, Fernald R. Plasticity of the reproductive axis caused by social status change in an african cichlid fish: II. testicular gene expression and spermatogenesis. Endocrinology. 2011;152:291-302 pubmed publisher
..Our results show that the testis is stimulated extremely quickly after perception of social opportunity, presumably to allow suppressed males to rapidly achieve high reproductive success in a dynamic social environment...
Maruska K, Tricas T. Gonadotropin-releasing hormone (GnRH) modulates auditory processing in the fish brain. Horm Behav. 2011;59:451-64 pubmed publisher
..To our knowledge, these results show for the first time in any vertebrate that GnRH can influence context-specific auditory processing in vivo in the brain, and may function to modulate seasonal auditory-mediated social behaviors. ..
Maruska K, Fernald R. Contextual chemosensory urine signaling in an African cichlid fish. J Exp Biol. 2012;215:68-74 pubmed publisher
..These data support the hypothesis that dominant males use urine as a chemical signal and adjust the frequency of their urine output based on contextual information. ..
Maruska K, Fernald R. Social regulation of gene expression in the hypothalamic-pituitary-gonadal axis. Physiology (Bethesda). 2011;26:412-23 pubmed publisher
..Here, we review how the reception of information in a social context causes genomic changes at each level of the HPG axis...