Gender temperature is determined during the period of genetic development. In cases where the fetus remains warm, the females result. In cases where the fetus remains cold, males result. In general, the nest contains warm and cold areas, so that males and females emerge from the same nest.
But if the turtle puts eggs during the season and the weather starts to cool, the result will be full male production, and the same is true if the turtle is placed in hot summer, the result will be full female production.
In addition, the turtle's chosen location also plays a role. If the turtle places its eggs in a shaded place under a tree, the nest will be cooler than the shaded place. For this reason, it is very important that we do not interfere in the placement of turtles for eggs and leave these places in nature to ensure access to natural diversity of males and females. - See more at: http://uae.panda.org/en/projects_en/marine_turtles_ara/marine_turtles_info_ara/turtle_life_ara/#sthash.gYxXxoCF.dpuf
Garcia-Guerrero et al 2003 -
Effect of temperature on lipids, proteins, and carbohydrates levels during development from egg extrusion to juvenile stage of Cherax quadricarinatus (Decapoda: Parastacidae)
Hessen et al 1987 - Egg development and lifecycle timing in the noble crayfish (Astacus astacus)
both in Aquaculture.
However not that recent...
Water temperature plays a very significant role in regulating breeding, egg development and molting in crayfish. By increasing water temperature gradually it is possible to manipulate advanced hatching of
A. leptodactylus eggs by weeks to months earlier than those under natural conditions. The following papers may be helpful.
Article Effects of different thermal treatments during embryonic dev...
http://www.trjfas.org/uploads/pdf_233.pdf
https://www.omicsonline.org/open-access/effect-of-temperatures-on-the-embryonic-development-morphometrics-and-survival-of-macrobrachium-idella-idella-hilgendorf-2155-9546-5-280.php?aid=33446v
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