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# Movements and Energetics of Nesting Chrysemys picta

Verfasser/in: Justin D Congdon; Robert E Gatten (Jr.) Artikel : Englisch Herpetologica, Mar., 1989, vol. 45, no. 1, p. 94-100 JSTOR We studied nesting activity and anaerobic metabolism of painted turtles in the vicinity of East Marsh on the University of Michigan's E. S. George Reserve in southeastern Michigan. Nesting activity began in mid-to-late May and continued through early July. Nesting migrations were initiated during all hours between 0700 and 1900 h with 24% starting before noon and 76% after noon. Peak initiation of nesting migrations occurred between 1600 and 1800 h. Almost all nesting migrations were initiated during daylight hours and the majority (75%) were completed before dark on the same day. Gravid females took approximately twice as long to move to a nest site as they did to return to the marsh after nesting. Most nests were completed between 1500 and 2200 h; the remainder were completed between 0900 and 1200 h (8%) or, if there was rain, between 1200 and 1500 h (19%). The time from beginning to end of nest construction averaged 1.5 h, and body temperatures of females at nest completion averaged 29.9 C. Nests averaged 60 m from the edge of East Marsh. Whole body lactate of females that had just completed nesting averaged $499\ \mu {\rm g}\ {\rm g}^{-1}$ which is 3.7 times the resting level reported for this species. Glycolysis provided only 1% of the ATP formed during the nesting process, and the total energetic cost of nesting activities was less than 1% of the energy invested in eggs.  Weiterlesen… (noch nicht bewertet) 0 mit Rezensionen - Verfassen Sie als Erste eine Rezension. In dieser Publikation nach anderen Aufsätzen mit folgenden Begriffen suchen:

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Dokumenttyp: Aufsatz Justin D Congdon; Robert E Gatten (Jr.) 0018-0831 485260589 English

### Abstract:

We studied nesting activity and anaerobic metabolism of painted turtles in the vicinity of East Marsh on the University of Michigan's E. S. George Reserve in southeastern Michigan. Nesting activity began in mid-to-late May and continued through early July. Nesting migrations were initiated during all hours between 0700 and 1900 h with 24% starting before noon and 76% after noon. Peak initiation of nesting migrations occurred between 1600 and 1800 h. Almost all nesting migrations were initiated during daylight hours and the majority (75%) were completed before dark on the same day. Gravid females took approximately twice as long to move to a nest site as they did to return to the marsh after nesting. Most nests were completed between 1500 and 2200 h; the remainder were completed between 0900 and 1200 h (8%) or, if there was rain, between 1200 and 1500 h (19%). The time from beginning to end of nest construction averaged 1.5 h, and body temperatures of females at nest completion averaged 29.9 C. Nests averaged 60 m from the edge of East Marsh. Whole body lactate of females that had just completed nesting averaged <tex-math>$499\ \mu {\rm g}\ {\rm g}^{-1}$</tex-math> which is 3.7 times the resting level reported for this species. Glycolysis provided only 1% of the ATP formed during the nesting process, and the total energetic cost of nesting activities was less than 1% of the energy invested in eggs.

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