arthropods why so successful? why so abundant?. why so successful? why so abundant? fact: there are...
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Exoskeleton Strong Protective Flexible at the jointsTRANSCRIPT
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
Segmentation & Appendages
Variety of appendages ► efficient locomotion
Legs (walking, hopping, swimming)Wings (flying)
Segmentation & Appendages
Variety of mouth parts ►many feeding patterns
Respiration:Air Piped Directly to Cells
O2 direct to muscles ► spiracles to tracheae
permits rapid movement
Highly Developed Senses
Touch E.g. antennae, sensilla Smell / chemosensors Hearing / Vibration E.g. tympanae (# 11) Balance
Complex Behaviors
1. Insect Societies (division of labor)
2. Many innate behaviors (genetically programmed) permit survivalE.g. * weaving of
spider webs,* building of bee hives, * bee dances
Bee dances
Dance performed in hive Pattern indicates distance &
direction of food source
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
For food supplies more than 100 meters the waggle dance is used.
MetamorphosisTwo Types:1. Incomplete
young look like mini adults
egg →nymph (instar)→ adult
E.g. grasshopper, arachnids, centipedes, millipedes
Metamorphosis2. Complete
young do NOT look like adults
egg → larva
→ pupa (cocoon/chrysalis)
→ adultE.g. bees, butterflies,
moths, beetles
Why So Successful?Why So Abundant?
What are six reasons that Arthropods are so successful?