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The role of hormones in the acquisition of sperm motility in salmonid fish

✍ Scribed by Miura, Takeshi ;Yamauchi, Kohei ;Takahashi, Hiroya ;Nagahama, Yoshitaka

Publisher
John Wiley and Sons
Year
1992
Tongue
English
Weight
441 KB
Volume
261
Category
Article
ISSN
0022-104X

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✦ Synopsis

Abstract

In salmonid fish, spermatozoa taken from the testes are immotile, but acquire motility during their passage through the sperm duct. Using male masu salmon (Oncorhynchus masou), we found that gonadotropin‐induced testicular production of 17α,20β‐dihydroxy‐4‐pregnen‐3‐one (17α,20β‐DP), the oocyte maturation‐inducing hormone of salmonid fish, is responsible for the acquisition of sperm motility. However, neither testosterone (T) nor 11‐ketotestosterone (11‐KT), the two major androgens in teleost fish, were effective. We also present evidence that 17α,20β‐DP action is mediated through an increase in sperm duct pH, which in turn increases the cAMP content of sperm allowing the acquisition of motility.

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