Latitudinal variation in life history, population dynamics, and speciation rates of medaka fishes.
2008/1/28 14:00~ (at The 3rd meeting room of the Biology Department)
In ectotherms, lower temperatures in high-latitude environments would reduce any physiological rates. If lower physiological rates reduce fitness, individuals in high latitudes may evolve compensatory responses. I demonstrate such local adaptations in the medaka fish Oryzias latipes, as a model system of ectotherms with wide geographic ranges, and resultant variation in population dynamics across latitudes. I also present the possibility that these adaptations cause latitudinal variation in speciation rates of this genus.
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