![]() It was concluded that duck eggs produced within a specific parental age period require a specific incubation RH to attain the best hatchability and posthatching duckling performance. The best incubation results were directly associated with the greatest duckling BW at hatching and at 21 d of age, BW gain, feed conversion, and viability during each parental age period. The lowest embryonic mortality among the incubation periods (14-24 and 0-24 d) and best hatchability of fertile eggs was recorded with 60% RH during the first parental age (25-35 wk), 65% RH during 36-55 wk of age, and 70% RH during 56-65 wk of age. ![]() Shell thickness decreased while pore density increased with increased parental age for both nonhatched and hatched eggs. ![]() Shell thickness was less for hatched eggs compared with nonhatched eggs within each parental age. Humidity It is very difficult to measure the relative humidity in small incubators so this is one of those areas where you have to do your best to estimate. Increasing RH from 55% to 60, 65, and 70% decreased percentage egg weight loss in a stepwise manner irrespective of parental age. Egg weight increased with hen age but did not differ by incubation treatment. Duckling weight at hatching was recorded and BW gain, feed consumption, feed conversion, and viability were then recorded to 21 d of age. A sample of 20 eggs from unhatched and hatched eggs from each group were randomly taken on the hatching day and used to determine eggshell thickness and pore number. All eggs were individually weighed before setting in the incubator and again at 14 and 24 d of incubation to determine egg weight loss. A total of 21,600 hatching eggs was subjected to 55, 60, 65, and 70% RH from 14 to 24 d, whereas standard conditions were used from 0 to 14 d and 24 to 28 d of incubation. Egg production was divided into 3 age groups (25-35, 36-55, and 56-65 wk). ![]() Chickens have a small opening at the base of their tail called the cloaca. Why is this The answer lies in the birds’ reproductive anatomy. If you wish to measure the humidity in your incubator via wet bulb, you can make your own wet bulb by placing the end of a short, hollow shoestring over the end. Chickens hatch chicken eggs and ducks hatch duck eggs. This study was conducted to determine the effect of incubation relative humidity (RH) from 14 to 24 d of incubation during 3 parental ages on hatchability and posthatching growth of Pekin ducklings. By John Lopez Last Updated on NovemChickens and ducks are both common farm animals, but they are very different. ![]()
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