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Megapode eggs take from 49 to 90 days depending on the mound and ambient temperature. Even in other birds, ambient temperatures can lead to variation in incubation period. [7] Normally the egg is incubated outside the body. However, in one recorded case, the egg incubation occurred entirely within a chicken.
Some reptiles use incubation temperatures to determine sex. In some species, this follows the pattern that eggs in extremely high or low temperatures become female and eggs in medium temperatures become male. [14] Within the mechanism, two distinct patterns have been discovered and named Pattern I and Pattern II.
A modern egg incubator. An incubator is a device simulating avian incubation by keeping eggs warm at a particular temperature range and in the correct humidity with a turning mechanism to hatch them. The common names of the incubator in other terms include breeding / hatching machines or hatchers, setters, and egg breeding / equipment. [1]
Further, estradiol-17β has been shown to reverse the sex of turtle species when injected into incubating eggs. These eggs were originally placed in are male producing temperatures, but with the estradiol-17β treatment, they would generate females. [34] However, hormone-based sex reversal would be dependent on the gonadal development stages of ...
Reptile eggs, bird eggs, and monotreme eggs are laid out of water and are surrounded by a protective shell, either flexible or inflexible. Eggs laid on land or in nests are usually kept within a warm and favorable temperature range while the embryo grows. When the embryo is adequately developed it hatches, i.e., breaks out of the egg's shell.
Broodiness is the action or behavioral tendency to sit on a clutch of eggs to incubate them, often requiring the non-expression of many other behaviors including feeding and drinking. [1] Being broody has been defined as "Being in a state of readiness to brood eggs that is characterized by cessation of laying and by marked changes in behavior ...
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