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Shell temperature: how shall we tell if a still gosling is under the eggshell?

Narushin, Valeriy G., Romanov, Michael N., Gressier, Louis, Jacob, Elouann, Salamon, Attila, Klein, Sabine, Kent, John P. (2024) Shell temperature: how shall we tell if a still gosling is under the eggshell? Theriogenology, 226 (15 Sep). pp. 57-67. ISSN 0093-691X. E-ISSN 1879-3231. (doi:10.1016/j.theriogenology.2024.05.045) (Access to this publication is currently restricted. You may be able to access a copy if URLs are provided) (KAR id:106149)

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Abstract

The present investigation was aimed at predicting a still (i.e., dead) vs. live embryo within a hatching goose egg by measuring the eggshell cooling rate. For this, we daily measured the temperature (T) values on the shell surface of goose eggs after they were removed from the incubator and during further natural cooling. T was recorded every 0.5 hours for further 1.5 hours of cooling. It was possible to recognize eggs with dead embryos using the combination of T, egg weight (W), and surface area (S). The resultant indicator (TS/W) was called specific temperature index (STI). The mathematical relationship using STI measurements between Days 8 to 13 facilitated 80% correct identification of the eggs with dead embryos. Additionally, we derived mathematical dependencies for shell weight (Ws) and thickness (t) by utilizing the values of W, egg volume (V), S, the average T of all measurements taken, as well as the drop in T during 1.5 hours of natural cooling. The key advantage of these parameters was their measurement and/or calculation by applying non-destructive methods. The integrated application of these parameters resulted in achieving high calculation accuracy as judged by correlation coefficients of 0.908 for Ws and 0.593 for t. These novel mathematical models have the potential to decrease hatching waste by predicting embryo viability. Our research will add to a toolkit for non-invasive egg assessment that is useful in the poultry industry, research on eggs, and engineering.

Item Type: Article
DOI/Identification number: 10.1016/j.theriogenology.2024.05.045
Uncontrolled keywords: Goose eggs; Shell temperature; Egg cooling rate; Specific temperature index; Hatchability; Non-destructive testing
Subjects: Q Science > QA Mathematics (inc Computing science)
Q Science > QA Mathematics (inc Computing science) > QA440 Geometry
Q Science > QH Natural history > QH324.2 Computational biology
Q Science > QL Zoology
S Agriculture > SF Animal culture
Divisions: Divisions > Division of Natural Sciences > Centre for Interdisciplinary Studies of Reproduction
Divisions > Division of Natural Sciences > Biosciences
Signature Themes: Food Systems, Natural Resources and Environment
Funders: University of Kent (https://ror.org/00xkeyj56)
Depositing User: Mike Romanov
Date Deposited: 01 Jun 2024 09:02 UTC
Last Modified: 07 Jun 2024 13:39 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/106149 (The current URI for this page, for reference purposes)

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