In temperate regions, Aedes aegypti (L.) (Diptera: Culicidae) populations remain in the egg stage during the cold season. To ensure the start of a new breeding season, eggs should hatch at the beginning of a favorable ...

In birds, the adaptive significance of hatching asynchrony has been under debate for many years and the parental effects on hatching asynchrony have been largely assumed but not often tested. Some authors suggest that ...

Experimental studies have shown that hatching rate depends, among other factors, on the main physical characteristics of the eggs. The physical parameters used in our work were egg weight, eggshell thickness, egg sphericity, ...

Three different egg hatching mechanisms were observed under laboratory conditions in Euphausia pacifica Hansen, Thysanoessa spinifera Holmes and Thysanoessa inspinata Nemoto: backward, forward and flipping. Like all broadcast ...

Egg hatching of winter-collected Ochlerotatus albifasciatus was studied for six months. Batches of eggs were divided into two groups, one of them was stored in the laboratory at 23ºC and 12:12 photoperiod, and the other ...

Egg laying is one of the most important phases in a female bird’s breeding cycle. Its cost is high because eggs contain all the resources needed for the development of an embryo. Variation in size and quality of eggs can ...