Genetic influence on tonic immobility in chickens

@article{Gallup1974GeneticIO,
  title={Genetic influence on tonic immobility in chickens},
  author={Gordon G. Jr. Gallup},
  journal={Animal Learning \& Behavior},
  year={1974},
  volume={2},
  pages={145-147}
}
  • G. Gallup
  • Published 1 June 1974
  • Psychology
  • Animal Learning & Behavior
Production Red chickens were selectively bred on the basis of having shown prolonged or brief immobility reactions at 21 days of age. After only one generation, there was sufficient separation between offspring to conclude that tonic immobility has an unusually large heritability component. Results were discussed in terms of their implications for an evolutionary model of animal hypnosis. 

Strain differences among chickens in tonic immobility: evidence for an emotionality component.

It was argued that defecation, rather than being an absolute measure of fear or emotionality, may in fact be an intermediate response to gradual fear reduction.

Genetic analysis of tonic immobility in young Japanese quail (Coturnix cotunix japonica)

Heritability estimates indicate that the additive genetic variation effecting tonic immobility is low to moderate in magnitude and indicates that this trait is associated with fitness.

The tonic immobility reaction of the domestic fowl: a review

Tonic immobility is an unlearned state of profound but reversible motor inhibition and reduced responsiveness which is induced by physical restraint which is thought to represent the term “spontaneous adolescence”.

Habituation and tonic immobility in domestic chickens.

  • R. NashG. Gallup
  • Psychology, Biology
    Journal of comparative and physiological psychology
  • 1976
It was shown that repeated elicitation of immobility, and not just handling, was responsible for reduced response durations after multiple exposures to manual restraint, and habituation was a function of the number of stimulus presentations.

Age-Dependent Change of Tonic Immobility Response in Chicks of a Native Japanese Chicken breed, Tosa-Jidori

It is demonstrated that Tosa-Jidori chicks show sexual differences in the fear response and further suggest that the temperamental differences may correspond to genetic characteristics of breeds.

Stability of fear and sociality in two strains of laying hens

Tonic immobility, exploratory and social reinstatement behaviours were consistent over time in both lines, as revealed by Kendall's W coefficient of concordance, and an inter-situational consistency was found.

Inheritance of predisposition to catalepsy in mice

The number of cataleptic and noncataleptic animals among the F2's and in the families of the CBA×F2 backcrosses agreed with the hypothesis that the pronounced predisposition to catalepsy in the C BA/Icg mice was determined by a single autosomal locus in homozygous recessive condition.
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References

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Chickens restrained in the presence of a stuffed hawk remained immobile appreciably longer than controls. The extent to which the hawk influenced susceptibility to immobility also varied as a

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    • 1973