Hormonal basis for sexual dimorphism of the sound-producing apparatus of the oyster toadfish

Michael L. Fine; Keith R. Pennypacker

doi:10.1016/0014-4886(86)90081-6

Hormonal basis for sexual dimorphism of the sound-producing apparatus of the oyster toadfish

Michael L. Fine
, Keith R. Pennypacker

Producción científica: Article › revisión exhaustiva

33 Citas (Scopus)

Resumen

We investigated the endocrine basis for sexual dimorphism of the sound-producing apparatus (swimbladder and attached sonic muscles) in the oyster toadfish Opsanus tau by implanting steroid pellets in gonadectomized females and males. In females, testosterone and dihydrotestosterone caused, respectively, 32.3 and 31.5% increase (P < 0.0001), and estradiol 17 β caused 11.3% increase (P < 0.0104) in swimbladder weight compared with controls. In males, testosterone caused 17.7% (P < 0.028), dihydrotestosterone 24.0% (P < 0.0008), and estradiol 10.8% (N.S.) increase from controls. Swimbladder weight gains occurred despite the fact that these fish refused food and did not gain weight. In a final experiment on fed females, testosterone and 11-ketotestosterone caused a similar increase (16.6 and 18.9%, respectively) compared with controls. These results indicate that swimbladders in adults of both sexes retain the ability to respond to steroid treatments and suggest that sexual differences in bladder size are controlled without a critical period by hormonal concentrations within the fish.

Idioma original	English
Páginas (desde-hasta)	289-298
Número de páginas	10
Publicación	Experimental Neurology
Volumen	92
N.º	2
DOI	https://doi.org/10.1016/0014-4886(86)90081-6
Estado	Published - may 1986

Nota bibliográfica

Funding Information:
Abbreviations: SMN-sonic motor nucleus, T-testosterone propionate, DHT-dihydrotestosterone, E-estradiol. ’ We thank Dr. Jennifer Stewart for reviewing the manuscript, Gary Hill for procuring toadfish. and Kathleen A. Drummond for technical assistance. Supported by Virginia Commonwealth University Biomedical Grant-in-Aid and National Institutes of Health grant MH3892 I. Contribution 1292 from the Virginia Institute of Marine Science, The College of William and Mary.

Financiación

Abbreviations: SMN-sonic motor nucleus, T-testosterone propionate, DHT-dihydrotestosterone, E-estradiol. ’ We thank Dr. Jennifer Stewart for reviewing the manuscript, Gary Hill for procuring toadfish. and Kathleen A. Drummond for technical assistance. Supported by Virginia Commonwealth University Biomedical Grant-in-Aid and National Institutes of Health grant MH3892 I. Contribution 1292 from the Virginia Institute of Marine Science, The College of William and Mary.

Financiadores	Número del financiador
National Institutes of Health (NIH)	MH3892
National Institute of Mental Health	R01MH038921
Virginia Sea Grant, Virginia Institute of Marine Science
Virginia Commonwealth University

ASJC Scopus subject areas

Neurology
Developmental Neuroscience

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title = "Hormonal basis for sexual dimorphism of the sound-producing apparatus of the oyster toadfish",

abstract = "We investigated the endocrine basis for sexual dimorphism of the sound-producing apparatus (swimbladder and attached sonic muscles) in the oyster toadfish Opsanus tau by implanting steroid pellets in gonadectomized females and males. In females, testosterone and dihydrotestosterone caused, respectively, 32.3 and 31.5\% increase (P < 0.0001), and estradiol 17 β caused 11.3\% increase (P < 0.0104) in swimbladder weight compared with controls. In males, testosterone caused 17.7\% (P < 0.028), dihydrotestosterone 24.0\% (P < 0.0008), and estradiol 10.8\% (N.S.) increase from controls. Swimbladder weight gains occurred despite the fact that these fish refused food and did not gain weight. In a final experiment on fed females, testosterone and 11-ketotestosterone caused a similar increase (16.6 and 18.9\%, respectively) compared with controls. These results indicate that swimbladders in adults of both sexes retain the ability to respond to steroid treatments and suggest that sexual differences in bladder size are controlled without a critical period by hormonal concentrations within the fish.",

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note = "Funding Information: Abbreviations: SMN-sonic motor nucleus, T-testosterone propionate, DHT-dihydrotestosterone, E-estradiol. {\textquoteright} We thank Dr. Jennifer Stewart for reviewing the manuscript, Gary Hill for procuring toadfish. and Kathleen A. Drummond for technical assistance. Supported by Virginia Commonwealth University Biomedical Grant-in-Aid and National Institutes of Health grant MH3892 I. Contribution 1292 from the Virginia Institute of Marine Science, The College of William and Mary.",

year = "1986",

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doi = "10.1016/0014-4886(86)90081-6",

language = "English",

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AU - Pennypacker, Keith R.

N1 - Funding Information: Abbreviations: SMN-sonic motor nucleus, T-testosterone propionate, DHT-dihydrotestosterone, E-estradiol. ’ We thank Dr. Jennifer Stewart for reviewing the manuscript, Gary Hill for procuring toadfish. and Kathleen A. Drummond for technical assistance. Supported by Virginia Commonwealth University Biomedical Grant-in-Aid and National Institutes of Health grant MH3892 I. Contribution 1292 from the Virginia Institute of Marine Science, The College of William and Mary.

PY - 1986/5

Y1 - 1986/5

N2 - We investigated the endocrine basis for sexual dimorphism of the sound-producing apparatus (swimbladder and attached sonic muscles) in the oyster toadfish Opsanus tau by implanting steroid pellets in gonadectomized females and males. In females, testosterone and dihydrotestosterone caused, respectively, 32.3 and 31.5% increase (P < 0.0001), and estradiol 17 β caused 11.3% increase (P < 0.0104) in swimbladder weight compared with controls. In males, testosterone caused 17.7% (P < 0.028), dihydrotestosterone 24.0% (P < 0.0008), and estradiol 10.8% (N.S.) increase from controls. Swimbladder weight gains occurred despite the fact that these fish refused food and did not gain weight. In a final experiment on fed females, testosterone and 11-ketotestosterone caused a similar increase (16.6 and 18.9%, respectively) compared with controls. These results indicate that swimbladders in adults of both sexes retain the ability to respond to steroid treatments and suggest that sexual differences in bladder size are controlled without a critical period by hormonal concentrations within the fish.

AB - We investigated the endocrine basis for sexual dimorphism of the sound-producing apparatus (swimbladder and attached sonic muscles) in the oyster toadfish Opsanus tau by implanting steroid pellets in gonadectomized females and males. In females, testosterone and dihydrotestosterone caused, respectively, 32.3 and 31.5% increase (P < 0.0001), and estradiol 17 β caused 11.3% increase (P < 0.0104) in swimbladder weight compared with controls. In males, testosterone caused 17.7% (P < 0.028), dihydrotestosterone 24.0% (P < 0.0008), and estradiol 10.8% (N.S.) increase from controls. Swimbladder weight gains occurred despite the fact that these fish refused food and did not gain weight. In a final experiment on fed females, testosterone and 11-ketotestosterone caused a similar increase (16.6 and 18.9%, respectively) compared with controls. These results indicate that swimbladders in adults of both sexes retain the ability to respond to steroid treatments and suggest that sexual differences in bladder size are controlled without a critical period by hormonal concentrations within the fish.

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Hormonal basis for sexual dimorphism of the sound-producing apparatus of the oyster toadfish

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