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

ABSTRACT: 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 4,000 offspring, we document fine-scaled temporal differences in individual reproductive success for two spatially adjacent (<10 km) 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 si

SUBMITTER: Roney NE 

PROVIDER: S-EPMC6303701 | biostudies-literature | 2018 Dec

REPOSITORIES: biostudies-literature