Changes in sex steroid hormone levels reflect the reproductive status of captive female zebra sharks (Stegostoma fasciatum).
General and Comparative Endocrinology(2018)
Abstract
•The Zebra shark showed an annual reproductive cycle.•E2 tended to increase a couple of months before ovarian follicle development.•E2 decreased along with the follicle depression.•Changes in E2 were inversely correlated with water temperature.•High levels of testosterone were correlated with the egg-laying period.
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Key words
E2,P4,T,the OCA
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