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Related Experiment Videos

Early nutrition causes persistent effects on pheasant morphology.

T Ohlsson1, H G Smith

  • 1Department of Animal Ecology, Lund University, SE 223 62 Lund, Sweden. thomas.ohlsson@zooekol.lu.se

Physiological and Biochemical Zoology : PBZ
|March 15, 2001
PubMed
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Early pheasant growth conditions significantly impact adult morphology. Dietary protein in the first 3 weeks affected tarsus length and fluctuating asymmetry, indicating lasting quality changes.

Area of Science:

  • Avian biology
  • Developmental physiology
  • Animal nutrition

Background:

  • Early life conditions can permanently influence bird morphology and quality.
  • Variations in annual growth conditions may lead to cohort-specific differences in birds.

Purpose of the Study:

  • To investigate the impact of early dietary protein levels on ring-necked pheasant development.
  • To determine if short-term dietary changes during early ontogeny cause lasting morphological and quality effects.

Main Methods:

  • Captive ring-necked pheasants were fed varying dietary protein levels during the first 8 weeks posthatching.
  • Growth, tarsus length, and fluctuating asymmetry were measured to assess treatment effects.
  • Compensatory growth was monitored during a postexperimental period.

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Main Results:

  • Increased dietary protein during the first 3 weeks accelerated early growth.
  • A difference in tarsus length persisted into adulthood following early protein manipulation.
  • Early dietary protein content influenced fluctuating asymmetry in tarsus length, indicating quality alterations.

Conclusions:

  • Dietary protein during the critical first 3 weeks of pheasant life has persistent effects on morphology and quality.
  • These findings may explain cohort size variations in pheasants and suggest indirect links to environmental factors like pesticide use.