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Brain Aromatase, Estrogens, and Behavior$
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Jacques Balthazart and Gregory Ball

Print publication date: 2012

Print ISBN-13: 9780199841196

Published to Oxford Scholarship Online: January 2013

DOI: 10.1093/acprof:oso/9780199841196.001.0001

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Rapid Effects of Estradiol on Behavioral and Physiological Responses Related to Reproduction in Male Goldfish

Rapid Effects of Estradiol on Behavioral and Physiological Responses Related to Reproduction in Male Goldfish

Chapter:
(p.497) Chapter 26 Rapid Effects of Estradiol on Behavioral and Physiological Responses Related to Reproduction in Male Goldfish
Source:
Brain Aromatase, Estrogens, and Behavior
Author(s):

Richmond R. Thompson

Lisa A. Mangiamele

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199841196.003.0026

Although estrogens clearly have rapid, nongenomic effects on cell physiology and brain function, only a few animal models have been developed in which the behavioral consequences of those mechanisms have been established. Recently, it was demonstrated that testosterone (T) can rapidly stimulate approach responses toward the visual cues of potential mates in male goldfish through a rapid mechanism (〈1 hour), and that T’s effects depend on its aromatization into estradiol (E2). Sexual stimuli induce surges in circulating T in this species, which this chapter proposes may drive the rapid behavioral effects of E2 by increasing local aromatase substrate. Furthermore, because aromatase is found in high quantities in visual pathways within the goldfish brain, the chapter suggests that these rapid hormonal effects may prime early sensory processes that increase the males’ ability to detect and/or orient towards the visual cues of potential mates. These studies indicate that T exerts rapid effects on behavioral and physiological processes that likely increase reproductive success in competitive breeding conditions.

Keywords:   estradiol, estrogen receptor, fish, goldfish, nongenomic membrane receptor, sexual behavior, sperm competition, testosterone, visual

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