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. 2020 Oct 21;67(3):333–335. doi: 10.1093/cz/zoaa064

Figure 1.

Figure 1

Female chestnut lamprey Ichthyomyzon castaneus orient toward sex pheromones of sea lamprey Petromyzon marinus over conspecifics. (A) All responsive females (N = 10) first entered the nest with odorant from P. marinus over conspecifics (logistic regression P < 0.001). (B) Females spent more time in the nest with odorant from P. marinus over conspecifics (mean ± se; Wilcoxon rank-sum test P = 0.002). Data are presented for all responsive fish (N = 10), but females that eventually entered the conspecific nest (N = 4) also spent more time on the P. marinus nest (357 ± 126.63 s, mean ± se) compared to the conspecific nest (40.5 ± 22.3 s). (C) Male P. marinus release more of the sex pheromone 3-keto petromyzonol sulfate (3kPZS) than male I. castaneus (N = 28, 29; Wilcoxon rank-sum test P < 0.001).