Modeling the effect of temperature on the growth and development of ectotherms has received a great deal of attention, particularly with insects because of their economic impact on agricultural crops (e.g., Damos, 2012 Davidowitz & Nijhout, 2004 Girondot & Kaska, 2014 Ikemoto et al., 2013 Jarosik et al., 2004 Schoolfield et al., 1981 Sharpe & DeMichele, 1977). We hypothesize three possible explanations which are not mutually exclusive for the mismatch between our modeling and empirically measured in situ incubation period: (1) a difference in the way the incubation period is calculated in laboratory data and in our field nests, (2) inaccuracies in the assumptions made by our models at high incubation temperatures where there is no empirical laboratory data, and (3) a tendency for development rate in laboratory experiments to be progressively slower as temperature decreases compared with in situ incubation. We found that all our models overestimated the incubation period. We then use a novel method for detecting the time of hatching to measure the in situ incubation period of sea turtle clutches to test the accuracy of our models in predicting the incubation period from nest temperature traces. Here we use data derived from laboratory constant temperature incubation experiments to formulate development rate models that can be used to model embryonic development rate in sea turtle nests. Development rate of ectothermic animals varies with temperature.
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