FrigateB: Magnificent frigatebird

In pvrank: Rank Correlations

Description

Males of the magnificent frigatebird (Fregata magnificens) have a large red throat pouch. They visually display this pouch and use it to make a drumming sound when seeking mates.

Usage

data(FrigateB)

Format

A data frame with 18 observations on the following two variables.

Vol

Volume (cm^3).

Frq

Frequency (Hz).

Details

Madsen et al. (2004) wanted to know whether females, who presumably choose mates based on their pouch size, could use the pitch of the drumming sound as an indicator of pouch size. The authors estimated the volume of the pouch and the fundamental frequency of the drumming sound in 18 males.

Source

Madsen, V. et al. (2004). "Bimodal signaling of a sexually selected trait: gular pouch drumming in the magnificent frigatebird". Condor, 106, 156–160.

Examples

	data(FrigateB)
	head(FrigateB)

pvrank documentation built on May 17, 2018, 9:03 a.m.