Female birds deposit or 'excrete' lipophilic contaminants to their eggs during egg formation. Concentrations of xenobiotics in bird eggs can therefore accurately indicate levels of contamination in the environment and sampling of bird eggs is commonly used as a bio-monitoring tool. It is widely assumed that maternally transferred contaminants cause adverse effects on embryos but there has been ...

The Drosophila melanogaster ovo gene is required for survival and differentiation of female germline cells, apparently playing a role in germline sex determination. We recovered 60 kb of genomic DNA from its genetic location at 4E1,2 on the X chromosome. A transcription unit coding for an apparently female-specific germline-dependent 5-kb poly(A)+ RNA size class is located substantially in a 7-...

ABSTRACT: The objectives of this study were to assess the effects i) pre-incubation storage time Pekin duck eggs on incubation parameters and ii) different levels in ovo injection with maltodextrin duckling weight. was divided into two experiments using hatching Cherry Valley SM2 hens egg-laying ages between 31 40 weeks. In experiment I, 8,820 subjected periods (one-seven days). For II, 120 wei...