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Environmental context explains Levy and Brownian movement patterns of marine predators

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  • An Optimal Search Theory
  • The So-Called Levy-Flight Foraging Hypothesis(1)
  • Predicts That Predators Should Adopt Search Strategies Known As Levy Flights Where Prey Is Sparse An
  • But That Brownian Movement Is Sufficiently Efficient For Locating Abundant Prey(2-4)
  • Empirical Studies Have Generated Controversy Because The Accuracy Of Statistical Methods That Have B
  • 6)
  • Consequently
  • Whether Foragers Exhibit Levy Flights In The Wild Remains Unclear
  • Crucially
  • Moreover
  • It Has Not Been Tested Whether Observed Movement Patterns Across Natural Landscapes Having Different
  • Here We Use Maximum-Likelihood Methods To Test For Levy Patterns In Relation To Environmental Gradie
  • Strong Support Was Found For Levy Search Patterns Across 14 Species Of Open-Ocean Predatory Fish (Sh
  • Tuna
  • Billfish And Ocean Sunfish)
  • With Some Individuals Switching Between Levy And Brownian Movement As They Traversed Different Habit
  • We Tested The Spatial Occurrence Of These Two Principal Patterns And Found Levy Behaviour To Be Asso
  • These Results Are Consistent With The Levy-Flight Foraging Hypothesis(1
  • 7)
  • Supporting The Contention(8
  • 9) That Organism Search Strategies Naturally Evolved In Such A Way That They Exploit Optimal Levy Pa


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