. Advances in herpetology and evolutionary biology : essays in honor of Ernest E. Williams. Williams, Ernest E. (Ernest Edward); Herpetology; Evolution. Lizard Displays • Jenssen 563 series of single bobs (Fig. lOE). This dis- play type appears to be a simplified ver- sion of the Type D pattern. As in the C and D displays, the dewlap is pulsed during head bobbing (, in- ternal dewlap pulses). For most of the £ displays, there was a single internal dew- lap pulse just before the last head bob, and in some performances there were multiple internal dewlap pulses (Fig. lOE, stippled outline of
. Advances in herpetology and evolutionary biology : essays in honor of Ernest E. Williams. Williams, Ernest E. (Ernest Edward); Herpetology; Evolution. Lizard Displays • Jenssen 563 series of single bobs (Fig. lOE). This dis- play type appears to be a simplified ver- sion of the Type D pattern. As in the C and D displays, the dewlap is pulsed during head bobbing (, in- ternal dewlap pulses). For most of the £ displays, there was a single internal dew- lap pulse just before the last head bob, and in some performances there were multiple internal dewlap pulses (Fig. lOE, stippled outline of dewlap move- ment). The dewlap was also pulsed after the last head bob in all E displays, rang- ing from 1 to 7 extensions per display. All E displays were performed through Unit 7, but many contained additional single bobs. Covarying with this indeterminate bob series were changes in bob shape (Fig. lOE^^) as seen to a lesser degree in D displays. The addition of single bobs during repeated £ displays by a male, covaried with the bob of Unit 1 changing from a "spike" to a "; The number of bobs in Unit 3 also increased, and the single bobs tended to metamor- phose into the plateau-spike configura- tion. This transformation of the £ pattern. SECONDS Figure 10. Summary DAP graph of Anolis distichus Type E display (E), with an example of four sequenced displays by a single male (E^j^). Stippled dewlap exten- sion indicates the pulse was not always present. Num- bered boxes indicate duration and identity of units. during repeated performances is unique among previously studied lizard species. The closest resemblance to this phenom- enon is a shifting pattern within display performances by the banded iguana, Brachylophus fasciatus (Greenberg and Jenssen, 1983). Because the Type £ display pattern was not qualitatively stable, unit dura- tions and bob shape of given bob units experienced a wide range of variation. Therefore, the DAP graph of th
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Keywords: ., bookauthorharvarduniver, bookcentury1900, booksubjectherpetology
