Gestation length in Tarsius bancanus

Area of Science:

• Primatology
• Reproductive Biology
• Zoology

Background:

• Tarsiers are small, nocturnal primates known for their large eyes and unique adaptations.
• Accurate data on primate reproductive cycles, including gestation length, is crucial for conservation and evolutionary studies.
• Previous estimates for tarsier gestation were imprecise, hindering detailed biological understanding.

Purpose of the Study:

• To accurately determine the gestation length of the Sunda tarsier (Tarsius bancanus).
• To establish a precise reproductive baseline for Tarsius bancanus, replacing prior estimations.
• To contribute to the understanding of primate reproductive biology.

Main Methods:

• Determining gestation length through direct observation and evidence of conception.
• Utilizing vaginal smears to identify the presence of whole sperm as an indicator of successful mating and the start of gestation.
• Recording the precise day of conception confirmation to calculate the total gestation period.

Main Results:

• A precise gestation length of 178 days was established for Tarsius bancanus.
• This empirical value replaces the previously cited approximate gestation period of 6 months for Tarsius syrichta.
• The use of vaginal sperm presence provides a reliable method for pinpointing the onset of gestation in tarsiers.

Conclusions:

• The study provides the first scientifically validated gestation length for Tarsius bancanus.
• This finding significantly advances knowledge of tarsier reproductive biology.
• Accurate gestation data is vital for the effective conservation and management of endangered tarsier populations.