Data from: Costs of reproduction explain the correlated evolution of semelparity and egg size: theory and a test with salmon

Douglas C. Braun, Holly K. Kindsvater, Sarah P. Otto & John D. Reynolds
Species’ life history traits, including maturation age, number of reproductive bouts, offspring size and number, reflect adaptations to diverse biotic and abiotic selection pressures. A striking example of divergent life histories is the evolution of either iteroparity (breeding multiple times) or semelparity (breed once and die). We analysed published data on salmonid fishes and found that semelparous species produce larger eggs, that egg size and number increase with salmonid body size among populations and species...
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