Evolution, Ecology, and Conservation of Dolly Varden, White spotted Char, and Bull Trout

Dunham, Jason B.; Baxter, Colden V.; Fausch, Kurt D.; Fredenberg, Wade; Kitano, Satoshi; Koizumi, Itsuro; Morita, Kentaro; Nakamura, Tomoyuki; Rieman, Bruce E.; Savvaitova, K. A.; Stanford, Jack A.; Taylor, Eric B.; Yamamoto, Shoichiro

doi:10.1577/1548-8446-33.11.537

Cited by 95 publications

(100 citation statements)

References 85 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although generally low, forebay use was markedly seasonal, being highest in the fall and winter. The seasonal pattern of forebay use by bull trout is consistent with their migratory movements related to spawning and post-spawning (Dunham et al 2008). In both fluvial (i.e.…”

Section: Discussionmentioning

confidence: 53%

“…Given that adult bull trout are more mobile than adult burbot (Harrison et al 2013), we hypothesized that bull trout are more likely to encounter and use the forebay and hence become vulnerable to entrainment. We also hypothesized that bull trout would have a stronger seasonal pattern of entrainment vulnerability than burbot because adult bull trout are known to undergo seasonal spawning migrations into streams (Dunham et al 2008). Finally, given that habitat use in fishes can vary between day and night (Helfman 1993), between males and females (Hanson et al 2008), and ontogenetically (Ross 1986), we also evaluated if forebay use is associated with diel period, sex and size.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Forebay use and entrainment rates of resident adult fish in a large hydropower reservoir

Martins¹,

Gutowsky²,

Harrison³

et al. 2013

Aquat. Biol.

View full text Add to dashboard Cite

Fish entrainment occurs when individuals are displaced from reservoirs to downstream waters by way of water diversion through turbines or other water release structures. While much effort has been put into quantifying and reducing entrainment of downstream migrating salmonids, considerably less research has focused on fish that are residents in reservoirs and in many cases are the top piscivores in these systems. We used 2 yr of acoustic telemetry data on adult bull trout Salvelinus confluentus and burbot Lota lota tagged in Kinbasket Reservoir (British Columbia, Canada) to investigate entrainment vulnerability by measuring forebay use and entrainment rates. Our results revealed that (1) adult bull trout and burbot made little use of the forebay; (2) bull trout used the forebay more and had higher rates of entrainment than burbot; and (3) both forebay use and entrainment varied among seasons. Bull trout used the forebay more intensively and were mostly entrained in the fall and winter. Limited forebay use and entrainment data for burbot suggest that they are more vulnerable to entrainment in the fall. These findings should be generally applicable for adult bull trout and burbot in reservoirs that maximize operations in the fall and winter, and could help managers and industry to make informed decisions on how to mitigate and compensate for entrainment.

show abstract

Section: Discussionmentioning

confidence: 53%

Section: Introductionmentioning

confidence: 99%

Forebay use and entrainment rates of resident adult fish in a large hydropower reservoir

Martins¹,

Gutowsky²,

Harrison³

et al. 2013

Aquat. Biol.

View full text Add to dashboard Cite

show abstract

“…Therefore, it would be prudent to explore mitigation measures, such as operating deterrent devices (for example, strobe lights, sound, screens), to prevent bull trout from approaching and becoming entrained at hydropower intakes during the fall and winter. These approaches would likely benefit other resident fishes (for example, kokanee) at risk of and impacted by entrainment, but would be especially important for bull trout, given that the viability of their populations can be substantially reduced by losses of adults [16,52]. The results of this study also show how acoustic telemetry and state-space models can be combined to understand and categorize fish behavior in reservoirs and, more generally, in other environments with fluctuating water levels.…”

Section: Discussionmentioning

confidence: 85%

“…We focused on bull trout (Salvelinus confluentus), which is a char native to western Canada and the northwestern United States. Bull trout inhabit cold-water rivers, lakes and reservoirs and exhibit a range of life history forms (resident, fluvial, adfluvial and anadromous) [16]. The species remains active even in water temperatures below 2°C, possesses low thermal optima for growth and is highly sensitive to warm water temperature [17,18].…”

Section: Introductionmentioning

confidence: 99%

Behavioral attributes of turbine entrainment risk for adult resident fish revealed by acoustic telemetry and state-space modeling

Martins

Gutowsky

Harrison

et al. 2014

Animal Biotelemetry

View full text Add to dashboard Cite

Background: Fish entrainment through turbine intakes is one of the major issues for operators of hydropower facilities because it causes injury and/or mortality and adversely affects population abundance. Entrainment reduction strategies have been developed based on the behavior of downstream migrating fishes, particularly diadromous species. However, knowledge of the behavior of migratory fishes has very limited application for reducing the entrainment of resident fishes, including several species that represent important recreational and aboriginal fishery resources in reservoirs. In this study, we used fine-scale acoustic telemetry and state-space modeling to investigate behavioral attributes associated with entrainment risk of resident adult bull trout (Salvelinus confluentus) in a large hydropower reservoir in British Columbia, Canada. Results: We found that adult bull trout resided longer in the vicinity of the powerhouse and moved closer to the turbine intakes in the fall and particularly in the winter. Bull trout were more likely to engage in exploratory behavior (characteristic of foraging or reduced activity) during periods when their body temperature was lower or higher than 6°C. We also detected diel changes in behavioral attributes, with bull trout distance to intakes and probability of exploratory behavior slightly increasing at night.

show abstract

“…These experiences have forged new friendships and connections that span the globe (Fig. 6) and continue to foster reciprocal collaborations and new research and synthesis among Japanese researchers and western scientists that are advancing ecological research worldwide (e.g., Dunham et al 2008;Fausch et al 2010;Richardson and Sato 2015;Sato et al 2016).…”

Section: Conclusion: An Enduring Legacy For Ecologymentioning

confidence: 99%

Crossing boundaries: Shigeru Nakano's enduring legacy for ecology

Fausch

2017

Ecological Research

View full text Add to dashboard Cite

Shigeru Nakano was a Japanese ecologist whose work crossed boundaries among subdisciplines in ecology, between aquatic and terrestrial habitats, and between different languages and cultures. He published his first paper in 1985 while still an undergraduate, and is well known for his early research on the individual behavior of stream salmonids in dominance hierarchies. Shortly after completing his Master's degree in 1987 he began collaborating with many graduate students and other scientists, including those from the US, and expanded his research to include factors controlling stream salmonid distribution and abundance across spatial scales ranging from local to landscape levels. In 1995 he moved to a research station in southwestern Hokkaido and began new collaborative research on interactions between forest and stream food webs. Nakano pioneered large-scale field experiments using greenhouses to sever the reciprocal fluxes of invertebrate prey between stream and riparian food webs. The strong direct and indirect effects of isolating these food webs from each other on organisms ranging from stream algae to fish, riparian spiders, and bats have revealed new linkages and explained phenomena that were previously unexplained. When combined with similar results from other investigators, they have created a paradigm shift in ecology. Shigeru Nakano was lost at sea in Baja California on March 27, 2000 at the age of 37, but key papers from his 15-year career set new standards for rigor, detail, and synthesis. They continue to be highly cited and inspire new research, and to foster new collaborations among Japanese and western scientists.

show abstract

Evolution, Ecology, and Conservation of Dolly Varden, White spotted Char, and Bull Trout

Cited by 95 publications

References 85 publications

Forebay use and entrainment rates of resident adult fish in a large hydropower reservoir

Forebay use and entrainment rates of resident adult fish in a large hydropower reservoir

Behavioral attributes of turbine entrainment risk for adult resident fish revealed by acoustic telemetry and state-space modeling

Crossing boundaries: Shigeru Nakano's enduring legacy for ecology

Contact Info

Product

Resources

About