Effects of 11-ketotestosterone on genital papilla morphology in the sex changing fish Lythrypnus dalli |
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| Authors: | S L Carisle S K Marxer-Miller A V M Canario R F Oliveira L Carneiro M S Grober |
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| Institution: | Department of Life Sciences, Arizona State University West, P.O. Box 37100, Phoenix, Arizona, 85069-7100, U.S.A.;Centro de Ciencias do Mar, Universidade do Algarve, Campus de Gambelas, 8000 Faro, Portugal;Unidade de Investigao em Eco-Etologia, Instituto Superior de Psicologia Aplicada, R. Jardim do Tabaco 44, 1100 Lisboa, Portugal |
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| Abstract: | Five days after implantation with 11-ketotestosterone (KT) female Lythrypnus dalli exhibited elevated urinary KT levels and male-like genital papilla morphology. Papilla length increased, width decreased, and length : width ratio increased. Control fish exhibited increases in papilla length, and length : width ratio on day 3, but not on day 5. Changes in the total area of the papilla were not statistically significant. It is suggested that KT mediates genital papilla morphology rapidly and thus may be a useful indicator of circulating KT in L. dalli. |
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| Keywords: | androgens sex-reversal genital papilla |
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