notes8 - Insect Sociality Objectives 1. 2. 3. 4. Describe...

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1 1 Insect Sociality 2 Objectives 1. Describe the characteristics of subsocial and eusocial insect behavior. 2. Compare and contrast the life histories of ants and termites. 3. Define trophallaxis, pseudergate, caste, halpodiploid 4. Explain superorganism and how social insects are so successful. 3 Introduction Social behavior involves cooperation between individuals of the same species and the degree of that cooperation defines the type of sociality that species demonstrates. Do you know of any social animals? How about an animal you are very familiar with, humans? Do we display social behavior? What about insects? You have learned about many orders of insects in previous units, can you think of some that display social behavior? In fact, of all the insects in the world, only about two percent are considered to be truly social. Before we get too far ahead of ourselves, we need to define the different categories of social behavior. 4 Eusocial versus Subsocial If you . .. 1. Aggregate or 2. Have a division of labor or 3. Care for eggs or young after egg laying ... YOU are subsocial If you have … 1. Cooperative brood care (daycare) and 2. Overlapping generations and 3. Reproductive division of labor (castes) … YOU are eusocial sub=below eu=true Insects interact with each other, even if it is just to reproduce. The degree of their interaction places them in a category of social behavior. The two categories we will focus on in this unit are eusocial and subsocial behavior. 5 Examples of Social Insects certain bees and wasps beetles ( 13 families) true bugs (9 families) thrips plant lice webspinners ants mantids wasps earwigs bees crickets termites cockroaches Eusocial Subsocial – some species of:
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This note was uploaded on 07/23/2011 for the course ENY 3005 taught by Professor Staff during the Spring '08 term at University of Florida.

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notes8 - Insect Sociality Objectives 1. 2. 3. 4. Describe...

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