A total of 1,800 incubating eggs produced by a commercial flock of Cobb broiler breeders was used to determine the effects of storage duration (3 or 18 d) on spread of hatch and chick quality. Chick relative growth (RG) at the end of 7 d of rearing was also determined as a measure of the chick performance. Chick quality was defined to encompass several qualitative characteristics and scored acc...

Abstract King penguins ( Aptenodytes patagonicus ) are colonial seabirds presenting an extraordinary breeding cycle. Parents take over 14 months to raise a single chick independence, upon which fledglings depart at sea for more than year. Juveniles often return the colony within three austral summers following departure, and before age of first reproduction (around 5–6 years old), possibly acqu...

The morphogenetic development of the vestibular ganglion cells, nerve fibers and otic vesicle in the chick embryos from 3.5-day-old chick embryos until one day after birth of the chick of White Leghorns was investigated using light microscopy, scanning electron microscopy and lectin's HRP methods. The results were as follows: 1. On the 3.5-day-old chick embryos, the facial-acoustic ganglion mas...

Experience and research demonstrated that the quality of the day-old chick has a big influence on the growth and final performance of the broiler. Describing and measuring chick quality is considered to be very difficult. Visual score, Tona or Pascar score, day-old chick weight and chick length are commonly used for measuring chick quality. Visual scoring include color of the chickens, navel qu...

the effect of in ovo injection of olive leaf extract as a growth promoter antibiotic was studied on hatchability, day old chick weight, growth rate, feed conversion ratio, mortality and carcass efficiency. three hundred and twenty eggs were divided into 4 groups, and injected on day 18. treatments consisted of: 1- control (no injection). 2- injection of 1 ml of distilled water in air sac (dw), ...

the price fluctuations of chicken and its production inputs are one of the main challenges in broiler industry which affects the producer and consumer‘s welfare. this study investigates the price fluctuations of broiler and the price fluctuations of the two important inputs of broiler production -e.g. one day-old chick and soybean meal- in tehran province. to achieve the purpose, the non-linear...

In ovo studies on the effect of 1,3,5, ppm Bioneem (0.03%) formulation on Biochemical aspect of chick embryo revealed that there was dose dependent total protein reduction in 96 hrs old embryo (treated at 24 hrs) as compared to the control. Also there was reduction in total protein concentration Liver, Brain and Heart of 15 day old chick embryo (treated with Bioneem at 96 hrs. stage) as compare...

the aim of this study was to compare the effects of three antibiotic alternatives with a control (antibiotic-free) and an antibiotic diet on performance and gut morphology of broilers reared on litter. 600 day-old ross-308 chicks were assigned to 48 pens in a crd design with 6 × 2 factorial arrangements, in which 2 levels of chick density (5 and 7.5 chicks/m2) and 6 experimental diets (control,...

background: in this feasibility study, a mechanically loaded in-vitro tissue culture model of joint morphogenesis using the isolated lower extremity of the 8 day old chick embryo was developed to assess the effects of mechanical loading on joint morphogenesis. methods: the developed in-vitro system allows controlled flexion and extension of the chick embryonic knee with a range of motion of 20 ...