A refined guide for aging muskoxen (Ovibos moschatus) based on mandibular examination
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View abstract on PubMed
Summary
This summary is machine-generated.Accurate muskox aging is crucial for wildlife management. This study developed a decision tree integrating tooth eruption, mandible size, and cementum analysis for improved age estimation in harvested muskoxen.
Area Of Science
- Wildlife Ecology
- Conservation Biology
- Mammalogy
Background
- Accurate wildlife aging is vital for population dynamics modeling and harvest management.
- Standardized protocols for aging muskoxen are currently lacking.
- Effective conservation strategies rely on precise demographic data.
Purpose Of The Study
- To investigate and validate methods for aging muskoxen.
- To develop a reliable framework for age estimation in harvested populations.
- To enhance the accuracy of muskox population assessments.
Main Methods
- Examined 260 muskox mandibles for tooth eruption patterns and morphometrics.
- Radiographed 89 mandibles to track tooth eruption stages.
- Analyzed cementum annuli (CAA) in incisors and correlated with known ages.
Main Results
- Developed an age key for muskoxen up to 60 months based on tooth eruption.
- Caudal mandible length accurately predicted age up to 5 years (Adjusted R2 = 0.917).
- Cementum annuli analysis provided informative age estimates for adults, despite a tendency to underestimate age.
Conclusions
- Integrated tooth eruption, mandible morphometrics, and CAA into a decision tree for muskox aging.
- The developed framework significantly improves age estimation accuracy for harvested muskoxen.
- Enhanced age data will support more effective muskox population management and conservation efforts.
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