Quantitative analysis of size‐dependent variation in the fiddler crab wave display(Uca pugilator,brachyura, ocypodidae)

Stereotypy and variation in the claw waving display of the fiddler crab Uca tangeri

“…This is slightly higher than the CV values of the spatio-temporal units of U. pugilator, reported by Hyatt (1977), which range from 5 to 20%. But the "Complete wave duration" values are similar, although slightly lower, to the range of values for complete wave duration of other fiddler crab species (Hazlett 1972in Hyatt 1977).…”

“…This is slightly higher than the CV values of the spatio-temporal units of U. pugilator, reported by Hyatt (1977), which range from 5 to 20%. But the "Complete wave duration" values are similar, although slightly lower, to the range of values for complete wave duration of other fiddler crab species (Hazlett 1972in Hyatt 1977). An exception is the low within-male variance in "Maximum amplitude" (on average 7.31 and 10.70% for the high-and low-intensity waving, respectively) and specially its relatively high CV b / CV w ratio (2.12 for low-intensity waving and 2.58 for highintensity waving).…”

“…Based on previous studies of spatio-temporal components of waving (Hyatt 1977), four temporal and two spatial components of the waving display were measured (see Table 1). The same components were used to analyse both the high-and low-intensity waving movements of the major claw.…”

“…Altvogt 1957;Crane 1957Crane , 1958Salmon and Stout 1962;von Hagen 1962von Hagen , 1983von Hagen , 1993Salmon and Atsaides 1968;Backwell et al 1998;Oliveira and Custódio 1998;Latruffe et al 1999), but only a few have analysed waving structure in detail. For example, Hyatt (1977) found an ontogenic progression of the waving design (for both its temporal and spatial components) in Uca pugilator, suggesting that it could convey information regarding the sexual maturity of the displaying male; von Hagen (1993) used similar temporal parameters to compare the unusual female waving display of U. polita to that of conspecific males; and Murai and Backwell (2006) looked for differences between temporal and spatial components of the waving display of "visited by females" and "passed by females" males of U. perplexa.…”

The Design and Production of a Sexual Signal: Hoods and Hood Building by Male Fiddler Crabs Uca Musica

“…For example, hood building is not stereotyped. The coef cients of variation of the elements of building behavior we measured (Table 1) range from about 20-90% compared to about 20% or less for the structural features of hoods and for components of the claw waving display of Uca pugilator (Hyatt, 1977). Nor are the movements made during hood building obviously exaggerated for signal function.…”