Size-selective mortality occurs in smolts during a seaward migration, but not in river residents, in masu salmon (Oncorhynchus masou)

Futamura, Ryo; Morita, Kentaro; Kanno, Yoichiro; Kishida, Osamu

doi:10.1007/s10641-022-01213-z

Cited by 6 publications

(3 citation statements)

References 40 publications

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“…In addition to the direct increase in survival that fish might experience in high‐quality habitats, survival benefits associated with increased growth could remain after fish leave these habitats. These size‐based survival benefits, such as reduced predation (Osterback et al, 2014), can persist during migration to other regions or between high‐quality habitats (Futamura, Morita, Kanno, & Kishida, 2022).…”

Section: Introductionmentioning

confidence: 99%

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A meta‐analysis and model comparison of juvenile salmon growth across different habitat types

Dudley

Hendrix

Osterback

2022

River Research & Apps

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The size of an organism is an important factor for a variety of physiological and ecological processes. For fishes, larger size can increase long‐term survival and provide a population level benefit. Therefore, threatened and endangered species management often focuses on supporting high quality habitat that provides growth opportunities. There are numerous habitat characteristics that can affect growth, including food availability, temperature, and habitat complexity. Understanding how growth responds to habitat types of different quality is the first step in determining what could lead to increased growth and potentially increased individual survival. We use Bayesian techniques to determine which of the differing methods is best for modeling the effects of habitat type and temperature on growth. To apply this method, we gather data from previous studies of the growth benefits of differing habitats and temperature regimes on Chinook salmon on the Sacramento River, CA, USA. We find a consistent growth benefit of floodplain rearing across multiple studies and show that a Ratkowsky model is the best for modeling this growth data. This information can specifically help managers model and protect the endangered and threatened Chinook populations in this system and more generally understand fish growth across differing habitat types.

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Section: Introductionmentioning

confidence: 99%

“…migration to other regions or between high-quality habitats (Futamura, Morita, Kanno, & Kishida, 2022).…”

mentioning

confidence: 99%

A meta‐analysis and model comparison of juvenile salmon growth across different habitat types

Dudley

Hendrix

Osterback

2022

River Research & Apps

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“…To count them, we walked through the uppermost 5320‐m river reach (the survey reach) on 5 December 2021 (Figure 1a ). Further downstream was difficult to count them because of its riverscape (see Futamura et al, 2022 for detail). We walked upstream and counted the dead and live worms in each 100‐m section.…”

Section: Introductionmentioning

confidence: 99%

Winter gifts for river ecosystems: A massive supply of earthworms in early winter

Futamura

Furusawa

Okamiya

2022

Ecology and Evolution

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Terrestrial resource pulses can significantly affect the community dynamics of freshwater ecosystems. Previously, its effect on the river community is considered to be stronger in summer, whereas weaker in winter when terrestrial invertebrates are less abundant. The movement of the terrestrial earthworms is triggered in winter, so they may be supplied to winter rivers as terrestrial resource pulse, but little is known about it. Here, we report that the massive numbers of the terrestrial earthworms were supplied intensively to an upstream of the small river in early winter. In particular, we found large numbers of megascolecid earthworms were supplied in an upstream of the small river in Northern Japan. Furthermore, we observed that supplied earthworms were consumed by salmonid fish species (masu salmon, white spotted char and rainbow trout) and aquatic invertebrates (gammarid amphipod, planarian flatworm, and stonefly larvae). These findings suggest that the terrestrial earthworms may play a key role in ecosystem functioning in winter when severe and other resources are scarce.

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Partial Migration in Salmonids: Focusing on Asian Endemic Masu Salmon (Oncorhynchus masou) and White-Spotted Charr (Salvelinus leucomaenis)

Sahashi,

Morita

2024

Fish &Amp; Fisheries Series

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Size-selective mortality occurs in smolts during a seaward migration, but not in river residents, in masu salmon (Oncorhynchus masou)

Cited by 6 publications

References 40 publications

A meta‐analysis and model comparison of juvenile salmon growth across different habitat types

A meta‐analysis and model comparison of juvenile salmon growth across different habitat types

Winter gifts for river ecosystems: A massive supply of earthworms in early winter

Partial Migration in Salmonids: Focusing on Asian Endemic Masu Salmon (Oncorhynchus masou) and White-Spotted Charr (Salvelinus leucomaenis)

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