Sexual maturity in male Indo-Pacific bottlenose dolphins (Tursiops aduncus): evidence for regressed/pathological adults
| Autor: | Elena Trentin, Catherine M. Kemper, Ikuko Tomo |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Ecology
biology Physiology Anatomy biology.organism_classification Sertoli cell Bottlenose dolphin medicine.anatomical_structure Seminiferous tubule Genetics medicine Tursiops aduncus Sexual maturity Animal Science and Zoology Tunica Pathological Spermatogenesis Ecology Evolution Behavior and Systematics Nature and Landscape Conservation |
| Zdroj: | Journal of Mammalogy. 95:357-368 |
| ISSN: | 1545-1542 0022-2372 |
| Popis: | Age and sexual maturity have not previously been studied in Australian bottlenose dolphins. These were investigated in 57 male Indo-Pacific bottlenose dolphins (Tursiops aduncus) collected opportunistically in South Australia between 1989 and 2011. Age was estimated by counting growth layer groups in dentine tissue. Formalin-fixed testes plus epididymides were weighed, measured, and subsampled for histological analysis. Stage of spermatogenesis, presence of spermatozoa, testis tubule size, seminiferous tubule wall and tunica thickness, and relative amount of interstitial tissue were noted. Immature testis tubules contained only Sertoli cells and spermatogonia and had mean testis weights 84 μm. Regressed/pathological dolphins had testis weights (199–280 g), testis lengths (195–23... |
| Databáze: | OpenAIRE |
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