Shark Blood Study Challenges Longstanding Hormone Assumptions
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Original source:phys.org
Key Takeaways
- Spiny dogfish blood has been found to contain cortisol.
- Sharks were previously thought to lack this specific hormone.
- Findings reshape our understanding of vertebrate endocrinology.
Recent scientific research into the physiology of the North Pacific spiny dogfish has revealed unexpected biological mechanisms within these marine creatures. Historically, experts assumed that cartilaginous fish managed their metabolic energy and stress responses entirely through distinct hormonal pathways compared to mammals and bony fish.
However, this fresh investigation demonstrates the presence of cortisol in shark circulation. This discovery forces zoologists to reconsider the endocrine systems of ancient marine species and opens new avenues for comparative endocrinology.
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