hatching


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hatching

In embryology, the separation of the blastocyst from the zona pellucida.
References in periodicals archive ?
The temperature effects on hatching patterns (i.e., time to first hatch, hatch duration, and time to peak hatch) followed an expected negative relationship.
An electron microscopic study of the entodermal cells of the yolk sac of the chick during incubation and after hatching. Am.
We hypothesize from above laboratory data that in late winter and early spring, when temperatures are relatively low in the mornings, hatching of Homalodisca eggs will be staggered, whereas during late spring and summer when morning temperatures are relatively high, hatching and emergence of first instars will be synchronized, occurring on the same day for the most part.
The aim of this study is to evaluate the hatching capability of Ochlerotatus albifasciatus eggs laid at the end of the fall and exposed to cold temperature during the winter.
Reproductive ecology of the purple shell, Rapana venosa (Gastropod: Muricidae), with special reference to the reproductive cycle, deposition of egg capsules and hatching of larvae.
If larval release is under endogenous control, then the actual timing of hatching may be controlled by the female, the developing embryos, or both (Forward, 1987).
Mexico is the second country to launch a Hatching Hope project, following Indias launch in November of 2018.
Some species that provide direct maternal care of their embryos, in addition to the protection provided by the enveloping structures, can clearly regulate the timing of hatching (Clare, 1997; Oyarzun and Strathmann, 2011; Warkentin, 2011a; Branscomb et al., 2014; Lesoway et al., 2014).
Eggs are being fertilised in an incubator as part of the Hatching Programme and (below) a student holding a chick hatched as part of the programme.
Many organisms lay eggs in masses, and these eggs are often observed hatching in synchrony (Colbert et al.
Since the eggs need the same number of incubation days, the eggs end up hatching at different times.