Complex sentence: The prevalence is higher in Mulard ducks (40-70%) compared to under 6% in muscovy ducks due to the larger pectoralis profundus major and minor muscles in muscovy ducks compared to Mulards.
Split into simpler sentences: The prevalence is higher in Mulard ducks (40-70%) compared to under 6% in muscovy ducks. This is due to the larger pectoralis profundus major and minor muscles in muscovy ducks compared to Mulards.