Seals Trade Safety for Food: Arctic Study 

Why in News

• A study published in Ecology Letters (March 2026) by University of British Columbia and collaborators shows ringed seals risk predation to access diverse food in the Arctic.

Key Species Involved

• Ringed seal: Primary prey species in Arctic marine ecosystems
• Polar bear: Main predator dependent on sea ice for hunting

Study Area & Method

• Location: Eastern Hudson Bay (Arctic region)
• Tracked: 26 seals and 39 polar bears
• Tools: GPS tracking, Dive data analysis and Sea-ice mapping + fish diversity models

Core Findings

1. Food vs Fear Trade-off

• Seals avoid high-risk zones (areas with many polar bears)
• BUT:
  • Enter these zones if food diversity is high
  • Stay longer underwater (long dives) even in danger zones

2. “Landscape of Fear” Concept

• Animals modify behavior based on predator presence
• Seals:
  • Move quickly through risky areas
  • Adjust diving patterns depending on threat level

3. Portfolio Effect (Very Important)

• Seals prefer diverse prey instead of a single food source
• Similar to financial diversification:
  • Reduces risk of food scarcity in changing environments

4. Behavioral Adaptations

• Possible ability to: Detect predators (e.g., listening for polar bears on ice)
• Limitation: Hard to scientifically capture such micro-behaviors

5. Climate Change Impact

• Melting sea ice leads to:
  • Altered predator-prey interactions
  • Increased bear density in smaller ice areas
  • Entry of new predators like killer whales

Key Ecological Insight

• Wildlife survival depends on dual factors:
  1. Food availability
  2. Predation risk