منابع مشابه
Use of a sperm analyzer for evaluating broiler breeder males. 2. Selection of young broiler breeder roosters for the sperm quality index increases fertile egg production.
Previous research has shown that the sperm quality index (SQI) of rooster semen is indicative of overall semen quality. The objectives of the present experiments were to determine the correlation of the SQI with semen characteristics and fertility and to determine if selection of young males for the SQI would improve fertility. In Experiment 1 semen was collected from 35 Peterson males and was ...
متن کاملEffects of Long-term Induced Hyperthyroidism on Egg Quality Traits in Cobb 500 Broiler Breeder Hens
Published data on 4-week-long administration of exogenous thyroxine in broiler breeder hens to decline the cold-induced ascites in their progeny suggest that the long-term maternal hyperthyroidism would affect egg quality characteristics traits in Cobb 500 broiler breeder hens. Seventy 47-w-old broiler breeder Cobb 500 hens (5 replicates and 7 hens each) were assigned in separate cages and allo...
متن کاملLaying pattern parameters in broiler breeder hens and intrasequence changes in egg composition
The aim of the study was to analyze the pattern of oviposition time in laying sequences in broiler breeder hens and to determine a relationship between egg position in the sequence and egg quality. The sequences were described using mean oviposition time (hour) within a sequence, mean lag of oviposition time between successive ovipositions, and mean and cumulative lag of oviposition for a seque...
متن کاملProlong Egg Storage Affects Broiler Breeder Embryonic Metabolism and Chick Quality
The research investigates the effects of prolonged storage of hatching eggs on eggshell conductance (G) and embryonic metabolism of Ross 308 broiler breeder eggs. Hatching eggs were collected, weighed and stored for 10 days. After 10 days, a second group of eggs was collected as in the first, weighed and stored for additional 4 days to set up two pre-incubation storage treatments (4 days and 14...
متن کاملEffect of the Phytase Inclusion in Broiler Breeder Diets on Fecal and Egg Characteristics
Objective: A study was conducted to determine the effect of phytase inclusion in broiler breeder diets on fecal and egg characteristics of individually caged females. Materials and Methods: A total of 184 female broiler breeders were fed growing and laying diets containing 0.7% or 2.7% calcium (Ca) and 0.35% or 0.12% available phosphorus (AvP), respectively, with one of four graded levels of ph...
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ژورنال
عنوان ژورنال: Poultry Science
سال: 1980
ISSN: 0032-5791
DOI: 10.3382/ps.0591682