Influence of incubation temperature on hatchling phenotype in reptiles

Booth, David T. (2006) Influence of incubation temperature on hatchling phenotype in reptiles. Physiological And Biochemical Zoology, 79 2: 274-281. doi:10.1086/499988

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Author Booth, David T.
Title Influence of incubation temperature on hatchling phenotype in reptiles
Journal name Physiological And Biochemical Zoology   Check publisher's open access policy
ISSN 1522-2152
Publication date 2006-03
Sub-type Article (original research)
DOI 10.1086/499988
Open Access Status File (Publisher version)
Volume 79
Issue 2
Start page 274
End page 281
Total pages 8
Place of publication Chicago, IL United States
Publisher University of Chicago Press
Collection year 2006
Language eng
Subject C1
270604 Comparative Physiology
780105 Biological sciences
Abstract Incubation temperature influences hatchling phenotypes such as sex, size, shape, color, behavior, and locomotor performance in many reptiles, and there is growing concern that global warming might adversely affect reptile populations by altering frequencies of hatchling phenotypes. Here I overview a recent theoretical model used to predict hatchling sex of reptiles with temperature-dependent sex determination. This model predicts that sex ratios will be fairly robust to moderate global warming as long as eggs experience substantial daily cyclic fluctuations in incubation temperatures so that embryos are exposed to temperatures that inhibit embryonic development for part of the day. I also review studies that examine the influence of incubation temperature on posthatch locomotion performance and growth because these are the traits that are likely to have the greatest effect on hatchling fitness. The majority of these studies used artificial constant-temperature incubation, but some have addressed fluctuating incubation temperature regimes. Although the number of studies is small, it appears that fluctuating temperatures may enhance hatchling locomotor performance. This finding should not be surprising, given that the majority of natural reptile nests are relatively shallow and therefore experience daily fluctuations in incubation temperature.
Keyword Physiology
Turtles Chelydra-serpentina
Dependent Sex Determination
Chelodina-expansa Testudinata
Nest-site Selection
Pig-nosed Turtle
Locomotor Performance
Posthatching Growth
Natural Incubation
Northern Australia
Q-Index Code C1

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Created: Wed, 15 Aug 2007, 08:50:18 EST