Differential Effects of Sex Pheromone Compounds on Adult Female Sea Lamprey (Petromyzon marinus) Locomotor Patterns

Journal of Biological Rhythms
Erin J WalaszczykWeiming Li

Abstract

Synchronization of male and female locomotor activity plays a critical role in ensuring reproductive success, especially in semelparous species. The goal of this study was to elucidate the effects of individual chemical signals, or pheromones, on the locomotor activity in the sea lamprey (Petromyzon marinus). In their native habitat, adult preovulated females (POF) and ovulated females (OF) are exposed to sex pheromone compounds that are released from spermiated males and attract females to nests during their migration and spawning periods. In this study, locomotor activity of individual POF and OF was measured hourly in controlled laboratory conditions using an automated video-tracking system. Differences in the activity between a baseline day (no treatment exposure) and a treatment day (sex pheromone compound or control exposure) were examined for daytime and nighttime periods. Results showed that different pheromone compound treatments affected both POF and OF sea lamprey (p < 0.05) but in different ways. Spermiated male washings (SMW) and one of its main components, 7α,12α,24-trihydroxy-5α-cholan-3-one 24 sulfate (3kPZS), decreased activity of POF during the nighttime. SMW also reduced activity in POF during the daytime. In...Continue Reading

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Citations

Oct 5, 2018·PLoS Biology·Gheylen DaghfousRéjean Dubuc
Jul 14, 2020·The Journal of Veterinary Medical Science·Chiyo KitayamaDaisuke Kondoh
Mar 25, 2021·The Journal of Experimental Biology·Yu-Wen Chung-DavidsonWeiming Li
Sep 4, 2021·Integrative and Comparative Biology·Skye D FissetteWeiming Li

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