hatching


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Related to hatching: assisted hatching

hatching

[′hach·iŋ]
(graphic arts)
Parallel lines drawn on sections of plans for buildings or machines to distinguish between different materials.
References in periodicals archive ?
Prediction 1: When reared under a 12:12-h alternating temperature cycle, lubber eggs will exhibit a 24-h hatching cycle.
Hypotheses 2: Daily temperature rhythms stimulate synchronous hatching within individual egg pods of lubber grasshoppers.
Egg pods reared at a constant temperature will not show intra-pod hatching synchrony.
Cold temperatures (2-5[degrees]C) produced larger larvae at time of hatching, but the effects of egg incubation temperature on hatch size in other fish species appear to be species-specific.
Methven and Brown (1991) also showed similar effects on hatch rank for ocean pout (Macrozoarces americanus), but this pattern was only observed at low temperatures when the hatching period was extended.
Although some premature hatching occurred spontaneously, most of the time, wasps were the cause, she says.
Warkentin also found that jiggling a clutch would trigger a mass hatching.
To test that link, his team this summer painted gator eggs from Lake Woodruff with concentrations of DDE and dicofol to produce tissue contamination typical of hatchings from Lake Apopka.
Through not all their tests have been completed yet, Guillette told SCIENCE NEWS that "we're finding hormone levels in these hatchings that are almost identical to those in Apopka hatchings.
In the United States, at a highly respected IVF clinic, four patients with frozen embryos (all over 39 years of age and previously unsuccessful with classical IVF attempts) received the laser assisted hatching treatment.
The addition of computer control and laser assisting hatching should improve IVF pregnancy success rates.
With their fully developed joints, these animals probably left the nest right after hatching, Horner says.