6533b853fe1ef96bd12ac0ee

RESEARCH PRODUCT

Does evolution of iteroparous and semelparous reproduction call for spatially structured systems?

Veijo KaitalaSusanna AlajaDavid TesarEsa Ranta

subject

0106 biological sciencesMaleReproduction (economics)PopulationPopulation DynamicsReproductive strategyBiology010603 evolutionary biology01 natural sciencesModels BiologicalEvolutionarily stable strategyGeneticsAnimalseducationSemelparity and iteroparityEcology Evolution Behavior and SystematicsEcosystemeducation.field_of_studyEcologyReproductionBiological Evolution010601 ecologyEvolutionary biologyMutationBiological dispersalFemaleStructured systemsGeneral Agricultural and Biological Sciences

description

A persistent question in the evolution of life histories is the fitness trade-off between reproducing only once (semelparity) in a lifetime or reproducing repeated times in different seasons (iteroparity). The problem can be formulated into a research agenda by assuming that one reproductive strategy is resident (has already evolved) and by asking whether invasion (evolution) of an alternative reproductive strategy is possible. For a spatially nonstructured system, Bulmer (1994) derived the relationship v + PA1 (PA is adult survival; vbS and bS are offspring numbers for iteroparous and semelparous breeding strategies, respectively) at which semelparous population cannot be invaded by an iteroparous mutant. When the inequality is changed to v + PA1, invasion of a semelparous mutant is not possible. From the inequalities, it is easy to see that possibilities for evolutionary establishment of a novel reproductive strategy are rather narrow. We extended the evolutionary scenario into a spatially structured system with dispersal linkage among the subunits. In this domain, a rare reproductive strategy can easily invade a population dominated by a resident reproductive strategy. The parameter space enabling invasion is far more generous with spatially structured evolutionary scenarios than in a spatially nonstructured system.

10.1111/j.0014-3820.2000.tb00015.xhttps://pubmed.ncbi.nlm.nih.gov/10937191