Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
Parental responses to unexpectedly cool eggs in Nazca boobies Sula granti
 

Summary: Parental responses to unexpectedly cool eggs in Nazca boobies
Sula granti
Stephanie M. Morgan, Leslie D. Clifford, Miriam A. Ashley-Ross and David J. Anderson
Morgan, S. M., Clifford, L. D., Ashley-Ross, M. A. and Anderson, D. J. 2004. Parental
responses to unexpectedly cool eggs in Nazca boobies Sula granti. / J. Avian Biol. 35:
416/424.
Although incubation temperatures have been documented extensively in birds, few
studies have followed fluctuations in temperatures throughout the length of the
incubation period in natural nests. We recorded incubation temperatures of Nazca
boobies Sula granti by replacing real booby eggs with a model egg containing an
internal floating data logger for three-day intervals in 47 nests (``experimental group'').
We also added the same logger eggs to 14 booby nests at the time of egg-laying, where
they remained as the second egg in the clutches for the entire incubation period
(``logger egg control group''). Finally, we measured surface temperatures of real eggs
with an infrared sensor (``real egg control group''). In both control groups, the average
temperature increased after laying, then stabilized for the remainder of the incubation
period. The experimental group differed from the controls, because the cool logger egg
could have been introduced at any point in the incubation cycle, not just at the
beginning. Egg temperature in the experimental group had a parabolic relationship
with day of incubation, because parents receiving a logger egg during the third quarter

  

Source: Anderson, David J. - Department of Biology, Wake Forest University
Ashley-Ross, Miriam A. - Department of Biology, Wake Forest University

 

Collections: Biology and Medicine; Environmental Sciences and Ecology