ArticleBiology of reproduction2020
Testosterone and semen seasonality for the sand tiger shark Carcharias taurus†.
Article in Biology of reproduction, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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Who cites it
13 citing papers in PubMed, 37 citations in OpenAlex.
- Non-invasive biomarkers of reproduction in individuals and populations of wild vertebrates.The Journal of reproduction and development · 2026Review
- First successful intra-uterine artificial insemination in a cownose ray (Rhinoptera javanica) using chilled semen.The Journal of veterinary medical science · 2025Article
- A New Research Tool for Use in Sharks and Rays: Relevance of Reproductive Hormone Levels in the Skin of Small-Spotted Catshark (Animals : an open access journal from MDPI · 2025Article
- The ancient and helical architecture of Elasmobranchii's spermatozoa enables progressive motility in viscous environments.PloS one · 2025Article
- The Improvement Effects of a Nutritional Fortifier on the Reproductive Performance, Sex Steroid Hormone Production, and Health of the Striped Bamboo SharkAnimals : an open access journal from MDPI · 2024Article
- Monitoring egg fertility, embryonic morbidity, and mortality in an oviparous elasmobranch using ultrasonography.Frontiers in veterinary science · 2024Article
- Baseline Health and Nutritional Parameters of Wild Sand Tigers Sampled in Delaware Bay.Journal of aquatic animal health · 2022Article
- Comparative Study of Semen Parameters and Hormone Profile in Small-Spotted Catshark (Animals : an open access journal from MDPI · 2021Article
- Non-Invasive Determination of Annual Fecal Cortisol, Androstenedione, and Testosterone Variations in a Herd of Male Asian Elephants (Animals : an open access journal from MDPI · 2021Article
- Initial Characterization of Male Southern Stingray (Animals : an open access journal from MDPI · 2021Article
- Reproductive Anatomy of Chondrichthyans: Notes on Specimen Handling and Sperm Extraction. II. Sharks and Chimaeras.Animals : an open access journal from MDPI · 2021Article
- Self-adaptive and efficient propulsion of Ray sperms at different viscosities enabled by heterogeneous dual helixes.Proceedings of the National Academy of Sciences of the United States of America · 2021Article
- Artificial insemination and parthenogenesis in the whitespotted bamboo shark Chiloscyllium plagiosum.Scientific reports · 2021Article
Corrections and comments
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Authors and funding
9 authors at 4 institutions in 1 country.
Funding
Abstract
Understanding the fundamental reproductive biology of a species is the first step toward identifying parameters that are critical for reproduction and for the development of assisted reproductive techniques. Ejaculates were collected from aquarium (n = 24) and in situ (n = 34) sand tiger sharks Carcharias taurus. Volume, pH, osmolarity, sperm concentration, motility, status, morphology, and plasma membrane integrity were assessed for each ejaculate. Semen with the highest proportion of motile sperm was collected between April and June for both in situ and aquarium sand tiger sharks indicating a seasonal reproductive cycle. Overall, 17 of 30 semen samples collected from aquarium sharks from April through June contained motile sperm compared to 29 of 29 of in situ sharks, demonstrating semen quality differences between aquarium and in situ sharks. Sperm motility, status, morphology, and plasma membrane integrity were significantly higher (P < 0.05) for in situ compared to aquarium sand tiger sharks. Testosterone was measured by an enzyme immunoassay validated for the species. Testosterone concentration was seasonal for both aquarium and in situ sharks with highest concentrations measured in spring and lowest in summer. In situ sharks had higher (P < 0.05) testosterone concentration in spring than aquarium sharks. This study demonstrated annual reproduction with spring seasonality for male sand tiger sharks through marked seasonal differences in testosterone and semen production. Lower testosterone and poorer semen quality was observed in aquarium sharks likely contributing to the species' limited reproductive success in aquariums.
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