Author:
Booth David T.,Astill Katherine
Abstract
Eggs from the Heron Island, Great Barrier Reef, nesting population of green
turtles (Chelonia mydas) were incubated at
all-male-determining (26˚C) and all-female-determining (30˚C)
temperatures. Oxygen consumption and embryonic growth were monitored
throughout incubation, and hatchling masses and body dimensions were measured
from both temperatures. Eggs hatched after 79 and 53 days incubation at
26˚C and 30˚C respectively. Oxygen consumption at both temperatures
increased to a peak several days before hatching, a pattern typical of turtle
embryos, and the rate of oxygen was higher at 30˚C than 26˚C. The
total amount of energy consumed during incubation, and hatchling dimensions,
were similar at both temperatures, but hatchlings from 26˚C had larger
mass, larger yolk-free mass and smaller residual yolks than hatchlings from
30˚C. Because of the difference in mass of hatchlings, hatchlings from
30˚C had a higher production cost.
Subject
Animal Science and Zoology,Ecology, Evolution, Behavior and Systematics
Cited by
85 articles.
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