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Files in this Data Supplement:
Fig. S1. Courtship and spawning behavior in Brienomyrus brachyistius.One or more behaviors precede spawning (A,B,D). Upon initiating a behavioral interaction with the female, the larger male closely follows her (A). When the female stops swimming forward, both sexes could engage in to head-to-tail circling behavior (B), the male line up parallel to the female while curving the posterior half of his body to engage in vent-to-vent coupling and both quiver their bodies (C) or they could hover (D). After spawning (C), the pair could end the courtship behaviors or may re-engage in to behaviors A,B, or D for another spawning bout. Shaded individual is the male and the other individual is the female.
Fig. S2. Histograms of inter-EOD intervals from all analyzed segments (1 ms bin width). (A) Non-breeding and breeding distributions for the males. (B) The same for females. Each column represents a different pair of fish. In each plot, the value above is the total number of discharge intervals, below, in parentheses is the number of intervals in excess of than 200 ms. Mean inter-EOD intervals are given (x).
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