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Increased osteoarthritis in moose from Isle Royale
1School of Forestry and Wood Products, Michigan Technological University, Houghton 49931.
Journal of Wildlife Diseases
|July 1, 1988
Summary
Moose in Isle Royale experienced a rise in osteoarthritis (DJD) linked to early-life nutritional stress, not genetics or activity. This study suggests a novel cause for joint disease in aging animals.
Area of Science:
- Wildlife ecology
- Veterinary pathology
- Environmental science
Background:
- Moose (Alces alces) populations in Isle Royale National Park show a significant increase in osteoarthritis (degenerative joint disease - DJD) over 30 years.
- Environmental factors are suspected as the primary driver for this observed rise in DJD prevalence.
Purpose of the Study:
- To investigate the causes behind the increased prevalence of degenerative joint disease (DJD) in Isle Royale moose.
- To explore potential environmental and biological factors contributing to osteoarthritis in Alces alces.
Main Methods:
- Analysis of long-term population data for moose (Alces alces) in Isle Royale National Park.
- Evaluation of environmental factors, physical activity, genetic changes, and disease introduction as potential causes for DJD.
Main Results:
- A multi-fold increase in osteoarthritis (DJD) prevalence was observed in Isle Royale moose over three decades.
- Moose born during periods of severe undernutrition exhibited the highest prevalence of DJD later in life.
- Genetic changes and increased physical activity were ruled out as primary causes for the observed DJD increase.
Conclusions:
- Early-life nutritional stress is hypothesized as a novel cause for increased joint disease (osteoarthritis/DJD) during senescence in moose (Alces alces).
- Environmental factors, particularly early nutrition, play a critical role in the long-term joint health of wildlife populations.