Modeling incubation temperature: the effects of incubator design, embryonic development, and egg size
Open Access
- 1 January 1997
- journal article
- review article
- Published by Elsevier BV in Poultry Science
- Vol. 76 (1), 124-133
- https://doi.org/10.1093/ps/76.1.124
Abstract
A simple model to describe the relationship between the temperature of the developing embryo, incubator temperature, embryo heat production, and thermal conductivity of the egg and surrounding air is presented. During early incubation, embryo temperature is slightly lower than incubator temperature because of evaporative cooling. However, from midincubation onwards, metabolic heat production from the embryo raises embryo temperature above incubator temperature. The extent of the rise in embryo temperature depends on thermal conductivity, which, in turn, is mainly influenced by the air speed over the egg. The importance of air speed and restrictions to air flow within artificial incubators is discussed. Exact determinations of optimum incubation temperatures from studies reported in the literature are difficult because only incubator temperatures are reported. Embryo temperatures can differ from incubator temperature because of differences in thermal conductivity between different incubation systems and differences between incubators in their ability to control temperatures uniformly. It is suggested that shell surface temperatures are monitored in experiments to investigate temperature effects to allow consistent comparisons between trials. Monitoring shell temperatures would also make it easier to translate optimum temperatures derived in small experimental incubators to the large commercial incubators used by the poultry industry. The relationship between egg temperature, the metabolism of the developing embryo and egg size is discussed.Keywords
This publication has 21 references indexed in Scilit:
- Effect of incubation temperature on the gross pathology of turkey embryosBritish Poultry Science, 1994
- The development of thermoregulation in turkey and guinea fowl hatchlings: similarities and differencesJournal of Comparative Physiology B, 1994
- Mathematical Modelling of Temperature and Moisture Loss of Hatching EggsJournal of Theoretical Biology, 1993
- Incubation temperature as a management tool: a reviewWorld's Poultry Science Journal, 1992
- Metabolism and Growth of Chickens Before and After Hatch in Relation to Incubation TemperaturesPoultry Science, 1983
- The effects of a lowered ambient temperature on oxygen consumption and lung ventilation in the perinatal quail (Coturnix C. japonica)Comparative Biochemistry and Physiology Part A: Physiology, 1983
- Adaptation of Avian Eggs to Incubation Period Variability Around Allometric Regressions Is Correlated with TimeAmerican Zoologist, 1980
- lodohormones in the serum of chick embryos and post-hatching chickens as influenced by incubation temperature. Relationship with the hatching process and thermogenesisAnnales de Biologie Animale Biochimie Biophysique, 1979
- Metabolism of Avian Embryos: Ontogeny and Temperature Effects in the OstrichOrnithological Applications, 1978
- The effect of incubation temperature on pre? and post?hatching development in chickensBritish Poultry Science, 1974