Preserved fish eggs can be used in many applications including artificial propagation and genetic studies. The aim of this study was to determine the effects of different temperatures and storage periods on fertilization and hatching success of short-term preserved scaly carp (Cyprinus carpio) eggs. Eggs were kept in 4 ml ovarian fluid in 10-cm petri dishes that were stored in a refrigerator at...

The research investigates the effects of prolonged storage of hatching eggs on eggshell conductance (G) and embryonic metabolism of Ross 308 broiler breeder eggs. Hatching eggs were collected, weighed and stored for 10 days. After 10 days, a second group of eggs was collected as in the first, weighed and stored for additional 4 days to set up two pre-incubation storage treatments (4 days and 14...

BACKGROUND AND AIM The aim of the successful incubation period is to achieve maximum health chicks in each batch. Therefore, all factors affecting incubation have to be investigated in detail. This study investigated the effect of eggshell thickness on hatchability of quail eggs. MATERIALS AND METHODS A total of 1415 eggs were collected from the same flock at the ages of 23 and 41 weeks. Two ...

The embryonic development and time to hatching of eggs can be highly adaptive in some species, and thus under selective pressure. In this study, we examined the underlying interfamily variation in hatching timing and embryonic development in a population of an oviparous amphibian, the rough-skinned newt (Taricha granulosa). We found significant, high variability in degree of embryonic developme...

Experimental synchronization of onset of incubation was employed in laboratory held zebra finches Taeniopygia guttata to study whether differential resource allocation and possible bias of offspring sex in subsequent eggs in the laying order could mitigate the effects of hatching asynchrony. We found that egg mass increased with laying order, but offspring sex was not related to laying order. A...

The aim of the performed investigations was to compare eggs of Japanese quail layers of different weights with regard to their shape, selected traits of the content following various times of their storage as well as the results of hatchability and body weight of one-day old chicks. Hatching eggs were divided into four groups: group S – up to 10.50 g, group M – from 10.51 to 11.50 g, group L – ...

—Synchronous hatching occurs in many reptiles that lay multi-egg clutches, but this phenomenon and its potential environmental cues are poorly documented for species that lay their eggs singly, such as Anolis lizards. We tested for a circadian hatching rhythm in 196 Brown Anole (Anolis sagrei) eggs maintained in social isolation under a 12 : 12 L : D photoperiod with constant temperature and hu...