Dr. Marlow, a zoologist, observes a troop of 120 spider monkeys in the Amazon. Initially, 65% are juveniles. Over the next 30 days, 15% of juveniles mature into adults, but 8% of the adult population migrates out. How many adult monkeys are present at the end of the period?

Mon, 04 May 2026 11:24:38 +0000

**Dr. Marlow, a zoologist, observes a troop of 120 spider monkeys in the Amazon. Initially, 65% are juveniles. Over the next 30 days, 15% of juveniles mature into adults, but 8% of the adult population migrates out. How many adult monkeys are present at the end of the period?** As climate pressures and environmental shifts reshape habitats across the Amazon, monitoring wildlife behavior offers crucial insights into species resilience. Dr. Marlow, a zoologist dedicated to tracking primate populations, closely observes a troop of 120 spider monkeys. These intelligent primates face growing ecological challenges, making accurate population dynamics essential for conservation and research. This focus on Amazonian monkey behavior taps into growing public interest in how wildlife adapts amid habitat change—a key trend driving meaningful engagement on platforms like Discover. Dr. Marlow’s study reveals a troop where 65% are juveniles, meaning vast numbers are still growing, learning, and integrating into social structures. Over the 30-day window, 15% of juvenile spider monkeys transition smoothly into adulthood—adding 18 strong, young adults to the group. However, the adult population contends with its own dynamic: 8% of current adults migrate, driven by food scarcity and territorial pressures.