Investigation of the Relationship between the Steroid Hormone 11-Ketotestosterone and Reproductive Status in the Fish Lythrurus fasciolaris
| Autor: | Bruce Stallsmith, Jennifer Schade |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
medicine.medical_specialty
biology medicine.drug_class Secondary sex characteristic Zoology biology.organism_classification Androgen Sexual dimorphism Gonadosomatic Index chemistry.chemical_compound Endocrinology chemistry visual_art Internal medicine visual_art.visual_art_medium medicine Cyprinidae 11-Ketotestosterone Lythrurus Operculum (gastropod) Ecology Evolution Behavior and Systematics |
| Zdroj: | The American Midland Naturalist. 168:218-230 |
| ISSN: | 1938-4238 0003-0031 |
| DOI: | 10.1674/0003-0031-168.1.218 |
| Popis: | In teleost fishes, 11-ketotestosterone (11KT) is a critical androgen regulating primary and secondary sex characteristics. In the sexually dimorphic Lythrurus fasciolaris (Cyprinidae), dominant nuptial males display heavy tuberculation on the head and nape, dark dorsolateral vertical bars, and dramatic red coloration in the fins, venter, and operculum area. This study aimed to quantify 11KT circulating levels in males and females, and determine any correlation with key male reproductive status indicators such as nuptial coloration, size, and gonadosomatic index (GSI). Thirty-one wild-caught L. fasciolaris were divided into three groups according to reproductive status: dominant males (D), non-dominant males (ND), and females (F). Physical measurements, digital imaging, and blood samples were used to quantify body size, GSI, nuptial coloration, and 11KT circulating levels. Dominant males had higher 11KT levels and nuptial coloration traits compared to ND males and females (red area, hue, saturatio... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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