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

(Exclusion of these three females from our analyses still yielded highly significant population‐origin effects in the GLM.) The lack of success among the largest females might be attributable to a lack of suitably sized males for paired spawning, possibly due to a physical limitation from males failing to grasp the females during the ventral mount or a behavioral choice on the female's behalf.

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