Animal Behaviour: Psych'Biol' 3750

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Animal BehaviourPsych./Biol. 3750

• Lecture 14 October 16, 2009

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Mid-term exam October 23

• Chapters 1-4, Chapters 10-11 and notes (so end of
  lecture on Friday)
• Questions requiring
• 1. 5-6 short answers 1-2 sentences,
• 2. 2 questions one paragraph each
• 3. 1 question - More than a paragraph

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Assignment 2

• Generate a hypothesis for each data set
• Analyze data
• Write a results section with figures
• Write a discussion, suggest future research
• Maximum two pages double spaced

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Vigilance response how many detectors are
required? (Lima 1995)
Lima, AB, 1995, 50, 1097
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Other factors affecting response in Lima 1995....

• More non-detectors left when two birds left
• Raptor model and ball equally affected

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Body mass affects take-off time
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Predator avoidance Body mass affects take-off
time - Zebra Finches (Metcalfe Ure, 1995)
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Zebra finch take-off

• Slower take-off at higher weights

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Predator-feeding trade-offs
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Predator-feeding trade-offs in stckleback
(Miliniski Heller)

• Fish forage more in low density prey after
  predator attack
• Why?

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Kangaroo rats are lunar phobic
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Reducing predation risk during foraging

• Desert rodents forage less on moonlit nights
  (e.g., kangaroo rats)

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Cookie size choice in squirrels

• Larger cookies took more handling time so small
  cookies preferred (Fig 11.25)
• Increased predation risk increase proportion of
  cookies taken to cover

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Conservation implication Migrating Western
Sanpipers Ydenberg et al
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(No Transcript)
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Coronal Sections of hippocampus of storing (a-c)
and non-storing birds (d-f)2
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Hippocampus size and storing in corvids (Fig
1020)

• Smaller in Non storers (A B on Fig 10.20 as in
  jackdaws)
• Moderate size storing (C, D E as in crows)
• Largest in European jays (F) - highest
  requirements

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Predator Inspection

• Why inspect?

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Why do gazelles approach cheetahs?

• Benefits in larger groups (Fig 1116)
• Why dont they approach dogs?

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Minnow inspection

• Less in wild fish from high predation (Dorset)
  site after predation (Fig 1118-19)
• More in predator-naïve, lab-reared Dorset
  offspring