Activity of Fiddler Crabs

Keywords: time series, periodicities

Description

Activity of individually caged fiddler crabs under constant conditions for 225 consecutive hours (225 = 9*25 = 9*24 + 8). The activity scale is log(y+1) where y is mean minutes per hour. Examination of the data suggests that the logarithm was base 10.


	Variable		Description

	Activity		log(Minutes per hour+1)

Download

Data File (tab-delimited text)

Source

Bliss, C. I. (1970). Statistics in Biology, V II. McGraw Hill. Table 17.17, page 258.

Data contributed by Kit Bingham, University of Minnesota.

Analysis

There is a bimodal pattern corresponding to the bimodal tidal rhythm.

Time series plot of activity (10558 bytes)