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Arthropods. Why So Successful? Why So Abundant?. Why So Successful? Why So Abundant?. Fact: There are more than 1 million different species of arthropod Fact: for every one human, there are 1 million arthropods on Earth. Exoskeleton. Strong Protective Flexible at the joints.

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arthropods

Arthropods

Why So Successful?

Why So Abundant?

why so successful why so abundant
Why So Successful?Why So Abundant?

Fact:

There are more than 1 million different species of arthropod

Fact:

for every one human, there are 1 million arthropods on Earth

exoskeleton
Exoskeleton
  • Strong
  • Protective
  • Flexible at the joints
segmentation appendages
Segmentation & Appendages
  • Variety of appendages ►

efficient locomotion

Legs (walking, hopping, swimming)

Wings (flying)

segmentation appendages5
Segmentation & Appendages
  • Variety of mouth parts ►

many feeding patterns

respiration air piped directly to cells
Respiration:Air Piped Directly to Cells
  • O2 direct to muscles ► spiracles to tracheae

permits rapid movement

highly developed senses
Highly Developed Senses
  • Touch E.g. antennae, sensilla
  • Smell / chemosensors
  • Hearing / Vibration E.g. tympanae (# 11)
  • Balance
complex behaviors
Complex Behaviors

1. Insect Societies

(division of labor)

2. Many innate behaviors (genetically programmed) permit survival

E.g.

* weaving of

spider webs,

* building of bee hives,

* bee dances

bee dances
Bee dances
  • Dance performed in hive
  • Pattern indicates distance & direction of food source
bee dance round dance
Bee Dance- Round Dance
  • This is used when the source of food (nectar or pollen) is less than 100 meters away
bee dances waggle dance
Bee Dances- Waggle Dance
  • For food supplies more than 100 meters the waggle dance is used.
metamorphosis
Metamorphosis

Two Types:

  • Incomplete

young look like mini adults

egg →nymph (instar)→ adult

E.g. grasshopper, arachnids, centipedes, millipedes

metamorphosis13
Metamorphosis

2. Complete

young do NOT look like adults

egg → larva

→ pupa (cocoon/chrysalis) → adult

E.g. bees, butterflies, moths, beetles

why so successful why so abundant14
Why So Successful?Why So Abundant?

What are six reasons that Arthropods are so successful?