Evidence of gene flow between Sulawesi macaques

Area of Science:

• Primate Ecology
• Evolutionary Biology
• Genetics

Background:

• Sulawesi macaques comprise five species: Macaca maurus, M. tonkeana, M. hecki, M. nigrescens, and M. nigra.
• Previous studies suggested potential hybridization zones between these species on the island.

Purpose of the Study:

• To assess the status of macaque populations in Sulawesi, Indonesia.
• To investigate evidence of hybridization between Sulawesi macaque species.

Main Methods:

• Conducted a pilot field study sampling wild and captive macaques.
• Analyzed morphological traits and gene frequencies.
• Reviewed recent scientific literature on Sulawesi macaques.

Main Results:

• Identified individuals with intermediate morphology and gene frequencies in hybridization zones.
• Found identical karyotypes across all investigated species, indicating no cytogenetic barriers to hybridization.
• Literature review corroborated evidence of hybridization among Sulawesi macaques.

Conclusions:

• Gene flow likely explains observed trait frequencies in Sulawesi macaques.
• Current classification schemes may require revision pending further data.
• Sulawesi macaques present a unique opportunity for evolutionary studies.