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<p>Size-dependent survival is a well-known phenomenon in fishes, typically positive but with exceptions. I investigated survival of chum salmon, <i>Oncorhynchus keta</i>, smolts in coastal waters of the Shiretoko Peninsula, northern Japan, using tethering experiments. Of 111 smolts, only 11 survived. Survival was explained solely by body size and was negatively correlated with it. These results suggest that predator foraging strategy and hatchery-wild differences may underlie the observed pattern, with implications for salmon management strategies.</p>

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Higher survival of smaller chum salmon smolts in coastal waters of northern Japan: evidence from tethering experiments

  • 期刊论文

  • 发表日期：

    2026年5月20日

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  • Taihei Yamada

摘要

Size-dependent survival is a well-known phenomenon in fishes, typically positive but with exceptions. I investigated survival of chum salmon, Oncorhynchus keta, smolts in coastal waters of the Shiretoko Peninsula, northern Japan, using tethering experiments. Of 111 smolts, only 11 survived. Survival was explained solely by body size and was negatively correlated with it. These results suggest that predator foraging strategy and hatchery-wild differences may underlie the observed pattern, with implications for salmon management strategies.