2018:groups:g6:start
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2018:groups:g6:start [2017/12/15 16:50] – [Introduction] maciel | 2018:groups:g6:start [2024/01/09 18:45] (current) – external edit 127.0.0.1 | ||
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**Group 6** | **Group 6** | ||
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Wiki site of the practical exercise of the [[http:// | Wiki site of the practical exercise of the [[http:// | ||
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===== Introduction ===== | ===== Introduction ===== | ||
- | Under the risk of predation many prey species employ defence mechanisms that potentially reduce their chances of being consumed. These mechanisms can involve shifts in the morphology, physiology , life-history and/or behaviour of prey species. | + | When predation |
- | {{ : | + | Kratina et al. (2010) studied the dynamics of an experimental food web consisting of the unicellular algae // |
- | **Fig. 1.** The intraguild predation community module. | + | {{: |
+ | The presence of predatory flatworms induces a change in morphology of // | ||
- | Intraguild predation is one of the basic three species community modules. It is composed of two consumers that share a common resource and one of the consumers (the intraguild predator) can prey on its competitor (the intraguild prey). Kratina et al (2010) studied the dynamics of a experimental food web consisting of the turbelarian flatworm | + | //Figure: Normal and induced morphs |
- | {{ : | ||
- | **Fig. 2.** Normal and induced morphs of //Euplotes octocarinatus// | ||
- | ===== Assignment ===== | + | {{ : |
+ | This system is an instance of one of the basic three-species community modules: // | ||
- | Develop an ordinary differential equations | ||
- | ===== Extension | + | ===== Assignment |
+ | |||
+ | Develop and analyze a model for the population dynamics of the system described, taking into account inducible defences of the // | ||
- | | + | ===== Questions and suggestions ===== |
+ | * Do inducible defences enhance the persistence of the intraguild prey? What are the conditions or parameter values that allow persistence? | ||
+ | | ||
+ | ==== Challenge ==== | ||
+ | * Inducible defences are not free: they incur extra developmental costs. Assuming a small cost, is it advantageous to have these defences? That is, could it be better to be always small or always big? Under what circumstances? | ||
===== Reference ===== | ===== Reference ===== |
2018/groups/g6/start.1513356650.txt.gz · Last modified: 2024/01/09 18:45 (external edit)