...James R. Stewart; Rebecca A. Pyles; Kaitlyn A. Mathis; Tom W. Ecay ABSTRACT The mineralized eggshell of Reptilia was a major innovation in the evolution of the amniotic egg. Inorganic components strengthen the eggshell and are a potential source of nutrients to developing embryos. Embryos...

... egg in an unusual and harsh environment; on exposed cliff ledges, without a nest, and in close proximity to conspecifics. As a consequence, the surface of guillemot eggshells is frequently contaminated with faeces, dirt, water and other detritus, which may impede gas exchange or facilitate microbial...

... or permeabilizing the eggshells, we raised embryos under anoxic conditions and also examined eggshell permeability using the lipophilic dye FM4-64. We found that asphyxiating the embryos arrested embryogenesis in a reversible manner but did not phenocopy the effects of ZTDO exposure, whereas the ZTDO-induced...

...H. Arthur Woods; Roger T. Bonnecaze; Brandy Zrubek SUMMARY Insect eggs must obtain oxygen across the eggshell to support embryonic development. Because eggs are small, obtaining enough oxygen would seem trivial. Recent work, however, has shown that eggs of a moth, Manduca sexta , are oxygen limited...

...H. Arthur Woods; Ryan I. Hill SUMMARY Most terrestrial insect embryos support metabolism with oxygen from the environment by diffusion across the eggshell. Because metabolism is more temperature sensitive than diffusion, embryos should be relatively oxygen-limited at high temperatures. We tested...

... the eggshell during in vitro culture. 05 01 1994 ©The Company of Biologists Limited 1994 Fertile eggs of domestic fowl (DeKalb Hybrids) were incubated with the blunt pole uppermost at 37.5 °C and 70 % relative humidity in a forced-draught incubator with hourly turning. Samples of eggs...