Answers are grounded in this paper and cite their sources.
D. W. Hagen, L. G. Gilbertson; GEOGRAPHIC VARIATION AND ENVIRONMENTAL SELECTION IN GASTEROSTEUS ACULEATUS L.
No takes yet. Share an insight, caveat, or question.
Hagen et al. (1972) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: