relation to environmental conditions. We studied sexual differences in hatching patterns and evaluated sex- and size …-related mortality in relation to hatching order and brood sex ratios in the chinstrap penguin Pygoscelis antarctica, a moderately size …-dimorphic species, with a modal clutch size of 2 eggs. We found that male, second-hatched, and large eggs showed shorter hatching …

The hatching rates of African catfish (Clarias gariepinus) eggs on four natural substrates: the roots of Nile cabbage … mean hatching rate of 66.2 ▒ 3.62%. Green grass leaves were second with a mean rate of 54.0 ▒ 3.46%, water hyacinth was …

investigate the spawning and hatching performance of the blue finned sea bream Sparidentex hasta indicated that the fish can be …

placed directly in a flowing river is described. Hatching ranged between 39 and 70%. This is not significantly different from … the commonly used water recirculating flow through system. The economic advantages of the river hatching method are …

found that polyandrous females that mated with two different males achieved a significantly higher egg-hatching success than … females as the egg-hatching success of different females that mated with one and same male did not correlate. The results …

lower quality than mixed pairs. The proportion of male offspring increased with hatching date in matched pale and mixed …

incubate early because asynchronous hatching provides fitness benefits to parents or surviving offspring. An alternative idea … viability; cleaned eggs held at the cool site had the highest hatching success, which was significantly greater than for … unincubated eggs of a wild bird, and that infection and ambient temperature act independently to reduce hatching success. These …

. The temporal pattern of hatching in an avian clutch has a large effect on size and developmental disparities among chicks …. Hatching spread is generally assumed to be mainly determined by the onset of incubation in relation to egg laying. However, the … extent to which factors other than incubation onset, such as development rate, also influence timing of hatching has received …

Hatching asynchrony in birds produces an age and size hierarchy among siblings. Later-hatching chicks have a … effects of hatching asynchrony, allowing a more precise adjustment of the survival probabilities of each chick. Here, we show … incubates longer before clutch completion, which is the major determinant of the degree of hatching asynchrony. This finding …