NDLI: Differentiated predation risk on hatchery-reared juvenile masu salmon by white-spotted charr with different body sizes

Content Provider	Springer Nature Link
Author	Miyamoto, Kouta Araki, Hitoshi
Copyright Year	2016
Abstract	Predation after release is one of the major concerns of hatchery fish propagation. However, size-specific interaction between predator and prey on the survival of hatchery-released salmonid fish is largely unknown. To understand the size-selective predation risk, 24-h predation experiments were conducted on masu salmon Oncorhynchus masou in tanks. Four ranges of fork length (FL) were examined for masu salmon as a prey, in combination with three ranges of FL for white-spotted charr Salvelinus leucomaenis as a predator. The results show that not only predator and prey sizes, but also interaction between prey size and predator size, strongly affected the survival rate of masu salmon. Predation on masu salmon with the FL exceeding 40% of the FL of white-spotted charr was rare in the experiment. A logistic regression suggests that 37% relative FL of masu salmon to white-spotted charr results in the 50% survival of masu salmon. Our results suggest that adjusting relative size of hatchery fish to the size of local fish predators at the time of hatchery release will have a significant impact on the survival of hatchery fish in the wild. From this perspective, site-specific, adaptive management might be important to improve the effectiveness of hatchery fish propagation.
Starting Page	245
Ending Page	250
Page Count	6
File Format	PDF
ISSN	09199268
Journal	Fisheries Science
Volume Number	83
Issue Number	2
e-ISSN	14442906
Language	English
Publisher	Springer Japan
Publisher Date	2016-12-28
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Fork length Predator-prey interaction Relative size River Oncorhynchus masou Salvelinus leucomaenis Fish & Wildlife Biology & Management Freshwater & Marine Ecology Food Science
Content Type	Text
Resource Type	Article
Subject	Aquatic Science

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Differences in longitudinal distribution patterns along a Honshu stream of brown trout Salmo trutta, white-spotted charr Salvelinus leucomaenis and masu salmon Oncorhynchus masou

Altitudinal niche partitioning between white-spotted charr (Salvelinus leucomaenis) and masu salmon (Oncorhynchus masou) in a Japanese river

Genetic introgression between masu salmon Oncorhynchus masou masou and red spotted masu salmon Oncorhynchus masou ishikawae

Interpopulation variation in egg size of fluvial white-spotted charr Salvelinus leucomaenis

Color vision, spectral sensitivity, accommodation, and visual acuity in juvenile masu salmon Oncorhynchus masou masou

Effect of smolt size on postrelease survival of hatchery‐reared masu salmon Oncorhynchus masou

Genetic identification of native populations of fluvial white-spotted charr Salvelinus leucomaenis in the upper Tone River drainage

Ultrastructural changes in gill chloride cells during smoltification in wild and hatchery-reared masu salmon Oncorhynchus masou.

Occurrence of a hybrid between endemic Miyabe charr Salvelinus malma miyabei and introduced masu salmon Oncorhynchus masou masou in the Lake Shikaribetsu system, Hokkaido, Japan

Differentiated predation risk on hatchery-reared juvenile masu salmon by white-spotted charr with different body sizes

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