Contrasting Ecology Shapes Juvenile Lake-Type and Riverine Sockeye Salmon

摘要: Here we compare the body shape of juvenile (age-0) sockeye salmon Oncorhynchus nerka that rear in lakes (lake type) with those rivers (riverine) and relate rearing habitat to morphology ecology. The two habitats present different swimming challenges respect water flow, foraging strategy, complexity, predation level. We morphological data from three riverine lake-type populations southwest Alaska. Using multivariate analyses conducted via geometric morphometrics, determine population- habitat-specific shape. As predicted, have a more robust shape, whereas streamlined In particular, found differences caudal peduncle depth (riverine deeper), eye size larger), overall deeper). One population did not follow predicted pattern, exhibiting an exaggerated Differences between terms predation, ecology are probably drivers these differences. Allometry differed life history types, suggesting there developmental