Ent 207                                  Lecture 1             January, 2002

Why study insects?

            1. ubiquitous - diversity

            2. general biology - e.g. anatomy, neurophysiology-pheromones.

            3. learn from them

                          i. interactions - food webs.

                         ii. biological control.

            4. food - protein source - yes folks, insects are edible.

            5. pollination - food production.

            6. commercial products

                          i. honey

                         ii. silk

            7. scientific research  - Drosophila -  a tool to study genetics .

            8. scavengers -  recycle organic material.

            9. pest management - agricultural entomology.

                        - < 1% pests.

                        - carry diseases.

                        - direct damage - wood, cloth, stored products, field crops.

Diversity

            1,400,000 described species

                        275,000 - flowering plants

                          44,000 - vertebrates:

                                       9,000 birds

                                       4,050 mammals

                                       2,800 fish

                                       5,600 reptiles

                                       3,260 amphibians

How many vertebrates left to be discoverd?   

        989,000 - invertebrates of which 792,500 - insects

How many insects left to be discovered?

        Terry Erwin - tropics (millions of new species to be described).

        Hugh Danks - Canada (50% of estimated 57,000 species described).