Trapping Effects and Fisheries Research: A Case Study of Sockeye Salmon in the Wenatchee River, USA

Murauskas, Joshua G.; Fryer, Jeffery K.; Nordlund, Bryan

doi:10.1080/03632415.2014.943366

Cited by 11 publications

(13 citation statements)

References 20 publications

(19 reference statements)

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“…There is limited information on how trapping affects migration timing and survival in existing trap-and-haul programs, but several studies (e.g., Bromaghin et al 2007;Marauskas et al 2014;Morrisett et al 2018) have evaluated these factors in other settings and provide useful insights. Murauskas et al (2014) evaluated passage delay and blockage of adult sockeye salmon at a combined passage and trapping facility on the Wenatchee River, Washington, in 2008-2012. Trapping operations occurred 7 days per week in 2008-2010 and median passage delay ranged from 0.4 to 8.7 days while an estimated 8-38% of the returning adults were prevented from migrating upstream past the trap (Murauskas et al 2014).…”

Section: Biological Responses To Trap-and-haulmentioning

confidence: 99%

Review of trap-and-haul for managing Pacific salmonids (Oncorhynchus spp.) in impounded river systems

Kock

Ferguson

Keefer

et al. 2020

Rev Fish Biol Fisheries

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High-head dams are migration barriers for Pacific salmon Oncorhynchus spp. in many river systems and recovery measures for impacted stocks are limited. Trap-and-haul has been widely used in attempts to facilitate recovery but information from existing programs has not been synthesized to inform improvements to aid recovery of salmonids in systems with high-head dams. We reviewed 17 trap-and-haul programs regarding Pacific salmon to: (1) summarize information about facility design, operation and biological effects; (2) identify critical knowledge gaps; and (3) evaluate trap-and-haul as a current and future management tool. Existing programs are operated to address a range of management goals including restoring access to historical habitats, temporarily reducing exposure to dangerous in-river conditions, and reintroducing ecological processes upstream from dams. Information gathered from decades of operation on facility design criteria and fish handling protocols, and robust literature on fish collection and passage are available. While many aspects of trap-and-haul have been evaluated, effects on population productivity and sustainability remain poorly understood. Long-term and systematic studies of trap-and-haul outcomes are rare, and assessments can be confounded by concurrent management actions and broad ecological and climatic effects. Existing data suggest that performance and effectiveness vary among programs and over various time scales within programs. Although critical information gaps exist, trap-and-haul is an important management and conservation tool for providing Pacific salmonids access to historical habitats. Successful application of trap-and-haul programs requires long-term commitment and an adaptive management approach by dam owners and stakeholders, and careful planning of new programs.

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Section: Biological Responses To Trap-and-haulmentioning

confidence: 99%

Review of trap-and-haul for managing Pacific salmonids (Oncorhynchus spp.) in impounded river systems

Kock

Ferguson

Keefer

et al. 2020

Rev Fish Biol Fisheries

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“…), while intensive trapping rates at Tumwater Dam substantially delayed or altogether precluded Wenatchee River basin Sockeye Salmon from migrating to spawning grounds (Murauskas et al. ). On the Yukon River, trap holding time at an in‐river fish wheel reduced upstream migration success for Chum Salmon O. keta (Bromaghin et al.…”

Section: Discussionmentioning

confidence: 99%

“…) and adult passage behavior and performance have been studied at length (Roscoe and Hinch ), limitations in monitoring upstream migration have hindered evaluations of the postpassage effects of passage route through these facilities (Roscoe and Hinch ) or interception and handling at these facilities (Murauskas et al. ).…”

mentioning

confidence: 99%

Passage Route and Upstream Migration Success: A Case Study of Snake River Salmonids Ascending Lower Granite Dam

Morrisett

Skalski

Kiefer

2018

N American J Fish Manag

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Lower Granite Dam is the last dam that federally protected Snake River salmonids Oncorhynchus spp. must ascend during their spawning migration. The dam has an adult fish ladder equipped with a trapping system to facilitate fisheries research and hatchery broodstock collection. There are three possible passage routes through the adult ladder: trapped, shunted, and free passage. During the adult trapping season, all fish must swim through 0.305‐m shunt pipes outfitted with PIT tag arrays that allow the selection of fish for trapping. Selected fish use the “trapped” route and are kept in a holding area for up to 20 h before being sampled and returned to the ladder. Unselected fish use the “shunted” route and immediately resume upstream migration after swimming through the pipes. When the trap is not in operation, the shunted route is inaccessible, and all fish use the “free passage” route to ascend the ladder without additional impediment. In 2016, a temporary change in ladder operations permitted free passage for a portion of the trapping season. Our study used this rare opportunity to evaluate how different passage routes affect in‐ladder transit time and upstream homing success for five salmonid stocks: Sockeye Salmon Oncorhynchus nerka; steelhead O. mykiss; and spring‐, summer‐, and fall‐run Chinook Salmon O. tshawytscha. In 2016, only Sockeye Salmon and spring‐ and summer‐run Chinook Salmon were given access to free passage, and we found evidence that free passage increased subsequent detection at natal sites upstream. An expanded analysis of shunted versus trapped fish during the years 2012–2016 found no difference in rates of detection to home tributaries by route of passage for any of the five fish stocks examined.

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“…Trap and truck programmes may be fraught with problems as fish may have difficulties finding the entrance to the trap, resulting in delays (Murauskas et al, 2014). Further, there is stress associated with being caught in a trap, and the handling and transportation of the fish may also cause injuries and in extreme cases spawning failure after release (Jokikokko, 2002;Portz et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

The Migratory Behaviour and Fallback Rate of Landlocked Atlantic Salmon (Salmo salar)in a Regulated River: does Timing Matter?

et al. 2016

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The behavior of early (June-July) and late (August-September) migrating, adult Atlantic salmon, in The River Klarälven, Sweden, was analyzed using radio telemetry. River Klarälven is a regulated river without functioning fishways, instead upstream migrating salmon are trapped and trucked past eight hydropower plants before released back to the river. We distinguished two parts of the spawning migration, that is, one part being the migration from the place where the fish was released to the spawning grounds. The other part was a holding phase on the spawning grounds with little or no movements before spawning. The late salmon spent less of their total time on holding, 36.2%, and more on migration, 63.8%, compared with early migrating salmon, which distributed their time rather evenly between migration, 47.5%, and holding, 52.5%. In total, early salmon used 30% more time migrating and 156% more time holding than late salmon. Some Atlantic salmon (Salmo salar) fell back over the hydropower plant after release and got excluded from spawning. The fallback rates of transported, tagged spawners were higher in the early than in the late group in both years. The fallback rate in 2012 was 42.8% of the early group and 15.1% in the late. In 2013, there were 51.7 % fallbacks in the early group and 3.4% in the late. The salmon fell back on average 9 days after being released in 2012 and 16 days in 2013. A high mean daily discharge on the day of release increased the probability of becoming a fallback.

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Trapping Effects and Fisheries Research: A Case Study of Sockeye Salmon in the Wenatchee River, USA

Cited by 11 publications

References 20 publications

Review of trap-and-haul for managing Pacific salmonids (Oncorhynchus spp.) in impounded river systems

Review of trap-and-haul for managing Pacific salmonids (Oncorhynchus spp.) in impounded river systems

Passage Route and Upstream Migration Success: A Case Study of Snake River Salmonids Ascending Lower Granite Dam

The Migratory Behaviour and Fallback Rate of Landlocked Atlantic Salmon (Salmo salar)in a Regulated River: does Timing Matter?

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