no domestic availability to breeder turkey stocks and turkey hatching eggs prompted the present experiment that aimed to evaluate the feasibility of a conventional artificial insemination (ai) procedure in british united turkey (but) for the first time in iran. broiler turkeys were restrictedly fed, grown for 46 weeks, and used for the current study (10 turkey toms and 24 turkey hens in total)....

Doncaster and Shepherd (1) reported that hatching of eggs of Heterodera rostochienis Woll. was preceded by larval movement, by purposeful and accurate stylet thrusts which cut a slit at the end of the egg shell, and by forward body thrusts of the larva which forced the slit open and allowed it to escape. We crushed in distilled water 30 cysts of H. iri Mathews found in association with creeping...

Common chameleon eggs spend the first months of incubation at low temperatures. I incubated eggs of different clutches at 25◦C in four treatments with respectively 0, 84, 119 and 149 days of initial cold period (at 14◦C). Treatments with longer cold periods had longer total incubation but shorter periods of incubation at 25◦C. Eggs which did not experience initial cold period showed low synchro...

Sibling cannibalism-the killing and consumption of conspecifics within broods-carries a high risk of direct and inclusive fitness loss for parents and offspring. We reported previously that a unique vibrational behavior shown by the mother of the subsocial burrower bug, Adomerus rotundus (Heteroptera: Cydnidae), induced synchronous hatching. Maternal regulation may be one of the most effective ...

An extensive study was conducted from March 2007 to February 2012 on hatching success of saltwater crocodile (Crocodylus porosus) in the Reptiles Farm Ltd. (RFL) located at Hatiber village of Uthura union under Bhaluka upazila in Mymensingh. The study was mainly based on direct field observation and some previous data collected by farm’s technicians. A special type of incubator having 98-100% m...

15 1. It has been reported that the increasing CO2 tension triggers the embryo to pip the air cell and 16 emerge from the egg. However, the mechanism by which higher CO2 concentrations during the 17 last few days of incubation affect chick physiology and the hatching process is unclear. This study 18 investigates the effect of CO2 concentrations up to 1% during pipping, on the onset and length ...