Sample Size Required for Various Methods of Assessing Bone Status in Commercial Leghorn Hens
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چکیده
منابع مشابه
Modeling ovarian follicle growth in commercial and heritage Single Comb White Leghorn hens.
Approximately 84% of the energy in chicken eggs resides in the yolk. A robust model of ovarian follicle development is therefore valuable for estimating energy requirements of laying hens. The current experiment was designed to model the growth of ovarian follicles in 32-wk-old modern commercial line (CL) and unselected heritage line (HL) Single Comb White Leghorn hens. The volume of yolk depos...
متن کاملCampylobacter species occurrence within internal organs and tissues of commercial caged Leghorn laying hens.
Campylobacter spp. are frequently present in the intestinal tract and internal tissues of broiler breeder and broiler chickens. Campylobacter spp. ecology in commercial Leghorn laying hens has not been extensively studied. The objectives of the current study were to determine 1) Campylobacter spp. presence in the reproductive tract, lymphoid organs, liver-gallbladder, and ceca of commercial Leg...
متن کاملDetermining the sample size required to compare vegetation and soil characteristics in two independent groups using effect size
Extended Abstract Background and objectives: One of the important steps in assessing rangeland vegetation is determining the sample size. Adequacy of sample size and its determination is always one of the main concerns of rangeland vegetation analyzer. There are two general methods for determining the sample size in rangeland science: graphic and statistical methods. In this study, the sample...
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ژورنال
عنوان ژورنال: Poultry Science
سال: 1993
ISSN: 0032-5791
DOI: 10.3382/ps.0720229