
TY  - JOUR
A1  - Hewavisenthi, Suhashini 
A1  - Parmenter, C. John 
T1  - Hydric environment and sex determination in the flatback turtle (<emph type="2">Natator depressus</emph> Garman) (Chelonia : Cheloniidae)
JF  - Australian Journal of Zoology
JO  - Aust. J. Zool.
Y1  - 2000
VL  - 48
IS  - 6
SP  - 653
EP  - 659
KW  - 
UR  - https://doi.org/10.1071/ZO00049 
N2  - Eggs of Natator depressus (from eastern Queensland, Australia) were incubated at a constant temperature of 29.5&#x02DA;C on vermiculite substrate with three different moisture levels: wet (~&#8211;180 kPa), intermediate (~&#8211;1200 kPa) and dry (~&#8211;2000 kPa). The male : female ratios on wet, intermediate and dry substrates were 8 : 7, 5 : 5 and 5 : 8 respectively. Sex determination was not influenced by the hydric environment but was significantly affected by different clutches. A clutch with smaller eggs appeared to produce a higher proportion of females. The pivotal temperature was close to 29.5&#x02DA;C, with a possibly narrow transitional temperature range of 1&#x02DA;C. Visual designation of sex was confirmed (100%) by histological examination. Hatching success and the incubation duration were not influenced by the hydric environment. 
ER  -

