Potential Classification of Sex and Stage of Gonadal Maturity of Wild White Sturgeon Using Blood Plasma Indicators
| Autor: | Martin S. Fitzpatrick, Carl B. Schreck, Grant W. Feist, Molly A. H. Webb, E. P. Foster |
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| Rok vydání: | 2002 |
| Předmět: |
Maturity (geology)
medicine.medical_specialty Physiology Aquatic Science Biology biology.organism_classification White (mutation) Sturgeon Endocrinology Sex steroid Internal medicine Acipenser transmontanus Blood plasma medicine Sexual maturity Ecology Evolution Behavior and Systematics Testosterone |
| Zdroj: | Transactions of the American Fisheries Society. 131:132-142 |
| ISSN: | 1548-8659 0002-8487 |
| DOI: | 10.1577/1548-8659(2002)131<0132:pcosas>2.0.co;2 |
| Popis: | Because white sturgeon Acipenser transmontanus show no readily discernible external signs of gender, management agencies use surgical biopsies to determine the sex and stage of gonadal maturity of individuals. This procedure is highly invasive and can be difficult under field conditions. Therefore, gonadal tissue and blood were collected from white sturgeon captured in tribal and commercial fisheries (fishery fish) and by fish and wildlife agencies (oversize fish) in the Columbia River basin to develop a method of determining sex and stage of maturity using the blood plasma indicators testosterone (T), 11-ketotestosterone (KT), estradiol (E2), and calcium (Ca2+). The sex and stage of maturity was determined by histology or by visual examination in maturing fish. Plasma sex steroid levels were measured by radioimmunoassay, and plasma Ca2+ was measured spectrophotometrically. White sturgeon showed sex- and maturity-specific levels of steroids and Ca2+. Stepwise discriminant function analysis (DFA) ... |
| Databáze: | OpenAIRE |
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