Data from: Fine-scale population differences in Atlantic cod reproductive success: a potential mechanism for ecological speciation in a marine fish ...

• Main Authors: Roney, Nancy E., Oomen, Rebekah A., Knutsen, Halvor, Olsen, Esben M., Hutchings, Jeffrey A.
• Format: Dataset
• Language: English
• Published: Dryad 2019
• Subjects: fjord; Parentage; Atlantic cod; mating; atlantic cod; Gadus morhua
• Online Access: https://dx.doi.org/10.5061/dryad.cd000qs; https://datadryad.org/stash/dataset/doi:10.5061/dryad.cd000qs

Successful resource-management and conservation outcomes ideally depend on matching the spatial scales of population demography, local adaptation, and threat mitigation. For marine fish with high dispersal capabilities, this remains a fundamental challenge. Based on daily parentage assignments of more than 4000 offspring, we document fine-scaled temporal differences in individual reproductive success for two spatially adjacent (<10km) populations of a broadcast-spawning marine fish. Distinguished by differences in genetics and life history, Atlantic cod (Gadus morhua) from inner- and outer-fjord populations were allowed to compete for mating and reproductive opportunities. After accounting for phenotypic variability in several traits, reproductive success of outer-fjord cod was significantly lower than that of inner-fjord cod. This finding, given that genomically different cod ecotypes inhabit inner- and outer-fjord waters, raises the intriguing hypothesis that the populations might be diverging because ... : Reproductive success of Atlantic codThe file contains individual phenotypic data of male and female Atlantic cod that were used in an experiment that quantified individual reproductive success, using parentage analysis, between cod captured in inner and outer waters of a single fjord.DRYAD_Reproductive_Success.xlsx ...