BIO318Y5 Lecture Notes - Lecture 18: Polistes, Eusociality, Maternal Sensitivity

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Published on 7 Apr 2014
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BIO318 Lecture
- Naked mole rats video
- Factors leading to the origin of eusociality
oHaplodiploidity has been debunked
oWorkers warn the scout
oWhy hymenopta evolved to eusociality
Mother and offspring
Maternal care; stingers
Toxin that will paralyze prey, but eusocial venom are used to drive away
other predators
- Female competition, reproductive skew and selfishness in eusocial insects
oEvolution of honest signals
- Polisted Carolina: most foundresses are full sisters
oNot as aggressive as hornets
oMore than one queen is needed to found a successful nest
oHooks that works as a walking stick
- Polistes paper wasps
- A selfish….
- Dominulus nest
- Different markings of the females; the dominant one will chew up the other female’s eggs
so that her eggs are the only ones around and then the rest becomes workers
- Groups of (totipotent) overwintered females found nests In Spring
oGet promoted to direct fitness by being the new queen
- It’s hard for one queen to create a nest
oPredation risk
oHard to get everything set up in the first 30 days
- In fact…
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Document Summary

Factors leading to the origin of eusociality: haplodiploidity has been debunked, workers warn the scout, why hymenopta evolved to eusociality. Mother and offspring: maternal care; stingers. Toxin that will paralyze prey, but eusocial venom are used to drive away other predators. Female competition, reproductive skew and selfishness in eusocial insects: evolution of honest signals. Polisted carolina: most foundresses are full sisters: not as aggressive as hornets, more than one queen is needed to found a successful nest, hooks that works as a walking stick. Different markings of the females; the dominant one will chew up the other female"s eggs so that her eggs are the only ones around and then the rest becomes workers. Groups of (totipotent) overwintered females found nests in spring: get promoted to direct fitness by being the new queen. It"s hard for one queen to create a nest: predation risk, hard to get everything set up in the first 30 days.

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