According to the article, there are "sneaker" males who can't "sing". These
smaller males contain up to 15% of their body weight in gonads, and they
sneak in and fertilize eggs laid by females attracted to the sounds of
larger "singing" males (who are 1% gonads). I suppose this is somewhat
analogous to Pacific salmon "jacks", males who mature rapidly and zip onto a
redd and fertilize a female salmon's eggs while she is preoccupied with a
larger adult male.
Jay DeLong
Olympia, WA
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