Endocrine events associated with spawning behavior in the sea lamprey (Petromyzon marinus) |
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| Authors: | J E Linville L H Hanson S A Sower |
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| Affiliation: | 1. Department of Cell Biology and Anatomy, Louisiana State University Health Sciences Center, Shreveport, LA 71130, United States;2. Department of Pathology, Louisiana State University Health Sciences Center, Shreveport, LA 71130, United States;3. Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center, Shreveport, LA 71130, United States;4. Department of Internal Medicine, Renal Division, Washington University, St. Louis, MO 63110, United States;5. Department of Medicine, Columbia University, New York, NY 10027, United States |
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| Abstract: | ![]()
Levels of estradiol, progesterone, and testosterone were determined in plasma of sea lamprey (Petromyzon marinus) undergoing certain behaviors associated with spawning in natural and artificial stream environments. Significantly higher levels of estradiol, progesterone, and testosterone were found in males than in females. In the artificial spawning channel, levels of estradiol were significantly higher in females exhibiting resting and swimming behaviors than in fanning, nest building, and spawning behaviors. No significant correlation was found with either progesterone or testosterone levels and the various reproductive behaviors. The data presented are the first experimental evidence that suggest gonadal steroids may be correlated with certain reproductive behaviors in the sea lamprey. |
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