Reconnecting Fragmented Sturgeon Populations in North American Rivers

Jager, Henriëtte I.; Parsley, Michael J.; Cech, Joseph J.; McLaughlin, Robert L.; Forsythe, Patrick S.; Elliott, Robert J.R.; Pracheil, Brenda M.

doi:10.1080/03632415.2015.1132705

Cited by 40 publications

(37 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2014), and the larger size of sturgeon and their benthic orientation present important design requirements (Jager et al, 2016;McElroy et al, 2012;Thiem et al, 2011). Downstream passage also presents a critical challenge, since mortality associated with downstream passage may diminish the benefits of restoring upstream passage.…”

Section: Boxmentioning

confidence: 99%

“…Downstream passage survival rates vary, depending both on the passage route (e.g., turbines, spillway) and the size of the fish (Kynard & Horgan, 2001;McDougall et al, 2014). The large size of adult sturgeon can mean that the trashracks prevent downstream movement via turbines, and as a result the fish of intermediate size may be most vulnerable to mortality during turbine passage (Jager et al, 2016). While there are a few notable examples of successful upstream or downstream passage (e.g., Parsley et al, 2007;Thiem et al, 2011), current findings generally indicate the need for further research to identify methods for effective passage for sturgeon (see Cooke et al, 2002;Jager et al, 2016).…”

Section: Boxmentioning

confidence: 99%

“…Releases of A. oxyrinchus began in 2006, and 1 750 000 individuals of all age classes (feeding larvae to subadults of 1.5m length) have been released as of 2016. However, based on maturation rates of captive broodstock and survival rate estimates from early releases (Jaric and Gessner, ; McManamay, Orth, & Dolloff, ) returning spawners are not expected to be observed prior to 2020. Verification of spawning habitat use will therefore not be possible prior to this date.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

If you build it, will they come? Spawning habitat remediation for sturgeon

et al. 2017

View full text Add to dashboard Cite

Summary Habitat loss is a widely recognized contributor to global declines in sturgeon populations yet habitat remediation has been limited for this highly endangered group of fish. In support of future sturgeon restoration efforts, this review examines habitat remediation needs and uncertainties. Consideration of the bio‐spatial scale of remediation identified needs ranging from local to the whole river scale. Additionally, the context of remediation ranges from reintroducing sturgeon to habitats where they have been extirpated to conservation of currently functional habitat. While multiple remediation scales and contexts are discussed, the focus on spawning and early rearing habitat and associated biological and physical monitoring reflects the range of current projects and the importance of early rearing habitats. Four case studies are presented that examine four distinct remediation contexts (mitigation, rejuvenation, re‐creation, repatriation) and three bio‐spatial scales (whole river, spawning reach, spawning location) under which remediation has been attempted. Evaluation of existing remediation works indicates that many show limited long‐term success, which is most often a response to substrate infilling in remediated habitats. Material presented in this review will help align sturgeon research and monitoring approaches in support of effective remediation. The limited number of remediation projects to‐date attests to the importance of learning from existing projects and cross‐species comparisons, to maximize the effectiveness of future restoration efforts.

show abstract

Section: Boxmentioning

confidence: 99%

Section: Boxmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

If you build it, will they come? Spawning habitat remediation for sturgeon

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Salmon and clupeids move upstream near the river surface and favor surface orifices in fishways whereas eels and sturgeons move along the river bottom; thus, fishways for these species require submerged orifices (Haro and Kynard , Jager et al. ). Holbrook et al.…”

Section: Biological Traits and Selective Fish Passagementioning

confidence: 99%

Selective fragmentation and the management of fish movement across anthropogenic barriers

Rahel

McLaughlin

2018

Ecological Applications

Self Cite

106

View full text Add to dashboard Cite

Disruption of movement patterns due to alterations in habitat connectivity is a pervasive effect of humans on animal populations. In many terrestrial and aquatic systems, there is increasing tension between the need to simultaneously allow passage of some species while blocking the passage of other species. We explore the ecological basis for selective fragmentation of riverine systems where the need to restrict movements of invasive species conflicts with the need to allow passage of species of commercial, recreational, or conservation concern. We develop a trait-based framework for selective fish passage based on understanding the types of movements displayed by fishes and the role of ecological filters in determining the spatial distributions of fishes. We then synthesize information on trait-based mechanisms involved with these filters to create a multidimensional niche space based on attributes such as physical capabilities, body morphology, sensory capabilities, behavior, and movement phenology. Following this, we review how these mechanisms have been applied to achieve selective fish passage across anthropogenic barriers. To date, trap-and-sort or capture-translocation efforts provide the best options for movement filters that are completely species selective, but these methods are hampered by the continual, high cost of manual sorting. Other less effective methods of selective passage risk collateral damage in the form of lower or higher than desired levels of passage. Fruitful areas for future work include using combinations of ecological and behavioral traits to passively segregate species; using taxon-specific chemical or auditory cues to direct unwanted species away from passageways and into physical or ecological traps while attracting desirable species to passageways; and developing automated sorting mechanisms based on fish recognition systems. The trait-based approach proposed for fish could serve as a template for selective fragmentation in other ecological systems.

show abstract

“…), population fragmentation (Jager et al. ; Leeuwen et al. ), and delayed migration (Lucas and Frear ; Silva et al.…”

mentioning

confidence: 99%

Passage Effectiveness at a Pool‐and‐Weir Fishway Designed to Accommodate Pacific Lampreys

Ackerman

Pyper²,

David

et al. 2019

N American J Fish Manag

View full text Add to dashboard Cite

Providing passage at man‐made barriers is important to preserving migratory fish species. Fishways used to bypass barriers have historically been designed to provide passage for economically important species, with little regard given to nontarget species. Consequently, native fish species whose swimming behaviors are not well suited to these fishways have suffered from restricted access to habitat. For example, poor passage at dams has contributed to declines in populations of Pacific Lamprey Entosphenus tridentatus in the Columbia River basin. Pool‐and‐weir fishways typical of Columbia basin dams are well suited to salmonids but not to anguilliforms like the Pacific Lamprey. We evaluated the passage efficiency of Pacific Lampreys through a new pool‐and‐weir fishway at River Mill Dam on the Clackamas River, Oregon, that was designed to facilitate Pacific Lamprey passage. Rounded corners at the fishway entrances, flush‐mounted weir gates, chamfered corners on orifices and weir walls, and orifices flush with the floor were all included in the fishway design specifically for Pacific Lampreys. In 2013 and 2015, Pacific Lampreys were radio‐tagged and PIT‐tagged to assess passage success. Dam passage efficiency estimates ranged from 84% to 98%, roughly 10–50% higher than Pacific Lamprey passage efficiency estimates at other dams in the Pacific Northwest. The median passage time through the fishway was 0.87 d in 2013 and 0.71 d in 2015. The high passage efficiency of Pacific Lampreys at River Mill Dam is likely due to the design elements incorporated specifically for Pacific Lampreys. These features could inform future fishway designs and modifications at locations where Pacific Lamprey passage is a consideration.

show abstract

Reconnecting Fragmented Sturgeon Populations in North American Rivers

Cited by 40 publications

References 31 publications

If you build it, will they come? Spawning habitat remediation for sturgeon

If you build it, will they come? Spawning habitat remediation for sturgeon

Selective fragmentation and the management of fish movement across anthropogenic barriers

Passage Effectiveness at a Pool‐and‐Weir Fishway Designed to Accommodate Pacific Lampreys

Contact Info

Product

Resources

About