Hello Friends, It’s the first week of semester so it’s Duncan talking again and he’s dredged up an old talk, partly because no-one remembers 2009 but mostly because he’s lazy: Sequential Hermaphrodites: Kinky Population Dynamics Honours course talk 2008, repeated for SUMS in 2009. A sequential hermaphrodite fish, such as Wrasse or Clownfish, is born as one sex and later under goes transition to the opposite sex. This is kinky. This talk was originally presented as assessment for the applied maths honours course ’Populations and Disease’. The assignment was to find three papers with a common theme in the area of mathematical biology and present a short talk about them. A continuously structured population model, due to Calsina and Ripoll, will be discussed. The model assumes a random age transition between the sexes. The fecundity (birth) and mortality functions are arbitrary and only restricted by obvious biological considerations. A stage structured population model including the effects of fishing, by Armsworth, will also be discussed. Time permitting, the talk will include discussion of a third paper about optimal breeding stragies for sequential hermaphrodites. The speaker is also available for private parties. There should be pizza. NOTE THE CHANGE OF DATE. Sorry for inconvenience.