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Social rank-dependent expression of arginine vasotocin in distinct preoptic regions in male Oryzias latipes


  • N. Kagawa

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    1. Department of Life Science, Faculty of Science and Technology, Kinki University, Higashiosaka, Osaka 577-8502, Japan
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This study examined arginine vasotocin (AVT) expression in the brains of dominant and subordinate male medaka Oryzias latipes after short- and long-term competition. High AVT expression in distinct preoptic regions was found in dominants and subordinates within minutes of encountering each other. During long-term competition, AVT expression remained high in dominants but not in subordinates.

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