research - r. aiken. hydrodynamics and grouping behaviour in barnacles hermaphrodite mating...
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Research - R. Aiken
Research - R. Aiken
Hydrodynamics and grouping behaviour in barnacles
Hermaphrodite
mating strategies
Hermaphrodite Mating Strategies
Mating Strategy
Males have a lower investment in offspringTherefore, should be promiscuous in mate choiceand mate with as many females as possible
Females have a higher investment in offspringTherefore, should be choosy in mate choiceand mate with only the ‘best’ male they can
Male and female strategies conflict
Hermaphrodite Mating Strategies
Among hermaphrodites
Male strategyFemale strategy
choosiness promiscuity
Combine in one animal
+
Hermaphrodite Mating Strategies
How do hermaphrodites maximize their reproductive successif they have conflicting interests in the same animal?
OR
How do hermaphrodites apportion their time and energy so as to maximize their success as both male and female?
Hermaphrodite Mating Strategies
To answer these questions, we look at:
1. Time (seasonal) shifts in behaviour
3. Seasonal changes in the proportion of gonad tissue devoted to the production of eggs and sperm
2. Conditions under which an animal chooses to actmore ‘male’ or more ‘female’.
Hermaphrodite Mating StrategiesWhat animals do we use?
Nudibranchand
Sacoglossan Molluscs
(sea slugs)
Hermaphrodite Mating StrategiesWhat animals do we use?
Bryozoans
Barnacles
Group Living and Hydrodynamics
What is the effect of being in a group on resource acquisition and reproduction in barnacles?
Hydrodynamics and Groups
What is the effect of being in a group on resource acquisition and reproduction in barnacles?
AB
Across an aggregation, there are differences in:
- size
- gonad development
- morphometrics
- symmetry
- food availability
Hydrodynamics and Groups
What is the effect of being in a group on resource acquisition and reproduction in barnacles?
Morphometrics and Environmental Stress
High Low
Fluctuating Asymmetry
Morphometrics and Environmental Stress
High Low
Kingsport
Conrad’s Beach
Grand Pré
Port Elgin
Baie Verte
Cape Enrage
Green’s Point
St. Andrews
Mace’s Bay
Where do we work?
• If you have the minimum GPA for Honours (3.0), I don’t worry too much about grades after that.
A little personal philosophy about Honours
• Everyone in the lab has their own project for which they are responsible.
• If you don’t have an Honours GPA, come and talk to me about a Special Topics (Bio 4950) project.
For more information• Email me and come for a chat
• Go to the lab website http://www.mta.ca/~raiken/Research/index.html
• Talk to current research students- Kelsey MacKay- Hilary Hamilton- Carrie MacDonald- Natalie Bjurman
