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  • Influence
A series of stages in the embryonic development of Chelydra serpentina
  • C. L. Yntema
  • Biology, Medicine
  • Journal of morphology
  • 1 June 1968
Eggs of the common snapping turtle, Chelydra serpentina serpentina were incubated at 30°C and at 20°C. The incubation period at the higher temperature was about 63 days. At the lower temperature, theExpand
  • 409
  • 32
Critical periods and pivotal temperatures for sexual differentiation in loggerhead sea turtles
Eggs of loggerhead sea turtles, Caretta caretta, were incubated at constant temperatures ranging from 24 to 34 °C. At temperatures of 32 °C or above all embryos developed into females as judged byExpand
  • 233
  • 20
SEXUAL DIFFERENTIATION IN HATCHLING LOGGERHEADS (CARETTA CARETTA) INCUBATED AT DIFFERENT CONTROLLED TEMPERATURES
A clutch of Caretta caretta eggs was divided into subgroups and incubated at constant temperatures ranging from 22?-36?C in 2? steps. Hatching occurred at 26?-34?C. At 30?C both males and femalesExpand
  • 234
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The origin of intrinsic ganglia of trunk viscera from vagal neural crest in the chick embryo
  • 389
  • 12
Temperature dependence of sexual differentiation in sea turtles: implications for conservation practices
Abstract Data on the effect of incubation temperature of the eggs on sexual differentiation in turtles are briefly reviewed. A change of 1–2°C can make a considerable difference to the sex ratio ofExpand
  • 222
  • 12
Temperature levels and periods of sex determination during incubation of eggs of Chelydra serpentina
  • C. L. Yntema
  • Biology, Medicine
  • Journal of morphology
  • 1 January 1979
Eggs of Chelydra serpentina were shifted during incubation between the female producing temperatures of 20°C or 30°C and the male producing temperature of 26°C. In the 20°C and 26°C combination, theExpand
  • 148
  • 9
Effects of incubation temperatures on sexual differentiation in the turtle, Chelydra serpentina
  • C. L. Yntema
  • Biology, Medicine
  • Journal of morphology
  • 1 October 1976
Eggs of the common snapping turtle, Chelydra serpentina, were incubated at constant temperatures ranging from 20°C to 30°C, At hatching, the oviducts were absent or incomplete in males; the testesExpand
  • 167
  • 6
  • PDF
INCUBATION TIMES FOR EGGS OF THE TURTLE CHELYDRA SERPENTINA (TESTUDINES: CHELYDRIDAE) AT VARIOUS
Eggs of the common snapping turtle, Chelydra serpentina, were incubated at constant temperatures of 20-35?C. Incubation was successful at temperatures of 22-30?C. Duration of incubation was inverselyExpand
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