Hitting the Ground Running: Environmentally Cued Hatching in a Lizard

Copeia ◽  
2013 ◽  
Vol 2013 (1) ◽  
pp. 160-165 ◽  
Author(s):  
J. Sean Doody ◽  
Phillip Paull
Keyword(s):  
Environmentally Cued Hatching

scholarly journals Taking the Plunge: California Grunion Embryos Emerge Rapidly with Environmentally Cued Hatching

2011 ◽  
Vol 51 (1) ◽  
pp. 26-37 ◽  
Author(s):  
K. Martin ◽  
K. Bailey ◽  
C. Moravek ◽  
K. Carlson
Keyword(s):  
Environmentally Cued Hatching

scholarly journals Embryonic communication in the nest: metabolic responses of reptilian embryos to developmental rates of siblings

2011 ◽  
Vol 279 (1734) ◽  
pp. 1709-1715 ◽  
Author(s):  
Jessica K. McGlashan ◽  
Ricky-John Spencer ◽  
Julie M. Old
Keyword(s):  
Developmental Stages ◽  
Incubation Temperature ◽  
Developmental Rate ◽  
Freshwater Turtle ◽  
Heart Rates ◽  
Developmental Rates ◽  
Environmentally Cued Hatching ◽  
Developmental Asynchrony ◽  
Developmental Conditions ◽  
Australian Freshwater

Incubation temperature affects developmental rates and defines many phenotypes and fitness characteristics of reptilian embryos. In turtles, eggs are deposited in layers within the nest, such that thermal gradients create independent developmental conditions for each egg. Despite differences in developmental rate, several studies have revealed unexpected synchronicity in hatching, however, the mechanisms through which synchrony are achieved may be different between species. Here, we examine the phenomenon of synchronous hatching in turtles by assessing proximate mechanisms in an Australian freshwater turtle ( Emydura macquarii ). We tested whether embryos hatch prematurely or developmentally compensate in response to more advanced embryos in a clutch. We established developmental asynchrony within a clutch of turtle eggs and assessed both metabolic and heart rates throughout incubation in constant and fluctuating temperatures. Turtles appeared to hatch at similar developmental stages, with less-developed embryos in experimental groups responding to the presence of more developed eggs in a clutch by increasing both metabolic and heart rates. Early hatching did not appear to reduce neuromuscular ability at hatching. These results support developmental adjustment mechanisms of the ‘catch-up hypothesis’ for synchronous hatching in E. macquarii and implies some level of embryo–embryo communication. The group environment of a nest strongly supports the development of adaptive communication mechanisms between siblings and the evolution of environmentally cued hatching.

Environmentally cued hatching in the bird-parasitic nest fly Philornis downsi

2018 ◽  
Vol 166 (9) ◽  
pp. 752-760 ◽  
Author(s):  
Roxanne Sage ◽  
Rebecca A. Boulton ◽  
Paola F. Lahuatte ◽  
Charlotte E. Causton ◽  
Richard Cloutier ◽  
...  
Keyword(s):  
Philornis Downsi ◽  
Environmentally Cued Hatching
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