BIOL 321 Chapter Notes - Chapter 7: Seaweed Pipefish, Pipefish, Formant
1 Aug 2017
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In the first sequence, a deepsnouted pipefish (syngnathus typhle) female is seen feeding, without expressing any courtship signals. In the second sequence, the same female is seen dancing in the presence of a prospective male mate while displaying black-striped ornamentation along the sides of her body. Females in such species often mate with multiple partners, and they commonly compete for access to males both overtly and via sexually selected displays. In some insects and birds, females may even commit infanticide as a means of obtaining reproductive opportunities. A red deer stag (cervus elaphus) with a harem of females nearby responds to the playback of conspecific male roars by issuing roars of his own: male red deer employ ritualized roaring contests to assess potential rivals. The formant frequencies of roars are inversely correlated with the length of a stag"s vocal tract, and hence they encode information on the signaler"s body size.
