METAMORPHOSIS

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METAMORPHOSIS

• DEVELOPMENTAL CHANGE

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INCOMPLETE METAMORPHOSIS

• EGG NYMPH ADULT
• Nymph looks like adult
• Sexually immature
• Nymph molts several times
• Grasshopper cycle
• http//www.livinghistoryfarm.org/farminginthe30s/p
  ests_02.html

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COMPLETE METAMORPHOSIS

• EGG LARVA PUPA ADULT
• Larva wormlike
• Caterpillar
• Pupa (chrysalis)
• inside cocoon (protective case)

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COMPLETE METAMORPHOSIS
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LARVA FORMS

• caterpillar butterfly / moth
• Wiggler mosquito
• Grub beetle
• Maggot fly

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IMPORTANCE OF METAMORPHOSIS

• Lessens competition for resources
• Aids survival of harsh conditions
  (winter)

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Insect Defense
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Passive Insect Defense

• Camouflage
• Natural coloration blends with environment
• Aposematic coloration
• Bright warning colors stands out

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Passive Insect Defense

• Batesian mimicry
• Harmless species looks like dangerous species
• i.e. monarch is poisonous /viceroy is NOT

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Insect Defense

• Mullerian mimicry
• Dangerous species mimics warning coloration of
  another

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Insect Communication
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INSECT COMMUNICATION

• PHEROMONES CONVEY
• Path to foodHive identification
• Recruit hive members for attack
• Attract mates

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INSECT COMMUNICATION

• Sound chirping crickets
• Attract females
• Warn males away from territories
• Species identification

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INSECT COMMUNICATION

• Buzzing mosquito
• Bioluminescence
• light flashes
• Find mates
• Flash patterns are species specific

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INSECT COMMUNICATION

• Dances bee movement patterns
• round dance
• Indicates food is near / not exact
• Circles to left then circles to right

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INSECT COMMUNICATION

• Waggle dance
• figure 8
• Indicates food is far by
• Duration of dance /
• number of waggles on each run
• http//www.bees-online.com/Download.htm