![]() The more information that is collected, the more valuable the data becomes. The figures should be placed inside a database or spreadsheet so that the data can be referenced by hatch date, week, month or flock type. This information can be associated by flock, machine, incubation day or breeder flock age. Calculation for determining the percentage of weight loss. ![]() (full tray weight at set - empty tray weight) multiplied by 100 (full setter tray weight at set - full setter tray weight at transfer ) / The figure needed is for 18 days of incubation (13.5%/19) x 18 = 12.8% at 18 days of incubation. To make this calculation take the percentage of moisture loss divided by the actual number of days of incubation and then multiply by the desired days of incubation.įor example, the moisture loss at 19 days of incubation is 13.5%. This process is simple and will ensure accurate useful data once collected. If the transfer time is a variable, all figures should be correlated back to one individual calculation. The egg used for replacement should be fertile with a viable embryo. If an egg has been broken or removed for some mechanical reason, then and only then should the replacement of an egg be performed. No eggs should be removed from the setter tray before calculating the weight at transfer time. Weighing each component in grams can help you achieve the most accurate detailed data. The calculation for determining the percentage of weight loss is shown in Table 1. This specific setter tray will again be weighed at transfer to obtain the percentage of moisture loss. The weight of an empty individual setter tray should also be known for calculation purposes. The eggs used in this calculation should be quality hatching eggs free of any shell quality issues, cracks or misshapen eggs. To begin the process, the setter tray with eggs in it should be weighed just before incubation. ![]() This practice should be done each hatch day, and the minimum basis for evaluation should include one young, one prime and one old flock source per hatch day.Ī common practice would be to obtain a moisture loss percentage each week on each flock source used at the hatchery. To increase accuracy of the data, try using the same locations when placing the trays. The trays should be placed in the top, middle and bottom of the setter cart or fixed rack system. Place these identified trays in different locations throughout the incubator to achieve the best calculations on moisture loss. How to achieve optimal moisture loss percentage by breeder age. We recommend weighing three to five tray positions per flock or incubator. These hatching trays should be properly identified throughout the incubation process to ensure continuity. What is the proper method for calculating moisture loss? The first step is to identify specific hatching trays for the exercise. Measuring moisture loss is an essential tool in helping obtain high chick quality and low seven-day mortality. There are visual signs from the egg and the chick that can indicate moisture loss levels are adequate to achieve maximum hatchability and chick quality. The percentage of moisture loss can vary according to the age of the breeder flock, seasonal influences or egg size. There are many factors to consider in achieving optimal moisture loss, and these can include humidity settings, damper positioning, variation in ventilation tolerances and atmospheric conditions. Weigh the setter tray with eggs in it just before incubation. This allows you to know just how much water is being removed from the egg during incubation. Calculating moisture loss from the egg during the incubation process is a vital tool in achieving good chick quality and hatchability.
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