Survival and Movement Patterns of Rainbow Trout Stocked in a Groundwater‐Influenced Warmwater Stream

Wolf, Skylar L.; Brewer, Shannon K.

doi:10.1002/nafm.10566

Cited by 4 publications

(12 citation statements)

References 53 publications

(91 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We show that large Rainbow Trout disrupt native food webs by preying on both smaller invertebrates and larger prey items. Localized effects may be amplified in stocked reaches due to relatively high apparent survival rates and relatively limited dispersal over 1 year (Wolf and Brewer 2021). Caution may be warranted if species of conservation concern are present.…”

Section: Discussionmentioning

confidence: 99%

“…Tracking indicated some dispersal throughout Spavinaw Creek but most (~90%) Rainbow Trout that were detected remained within a 2-km stream reach surrounding the stocking location. Estimated apparent weekly survival rates were variable during the winter and spring (0.74-1.0) and more consistent during the summer (0.93; Wolf and Brewer 2021). Consequently, Rainbow Trout densities declined between stocking events because of cumulative mortality over consecutive weeks (Wolf and Brewer 2021).…”

Section: Methodsmentioning

confidence: 96%

“…Estimated apparent weekly survival rates were variable during the winter and spring (0.74-1.0) and more consistent during the summer (0.93; Wolf and Brewer 2021). Consequently, Rainbow Trout densities declined between stocking events because of cumulative mortality over consecutive weeks (Wolf and Brewer 2021). For example, approximately 44% of Rainbow Trout stocked in November 2018 survived (apparent survival) to the following April.…”

Section: Methodsmentioning

confidence: 99%

“…Rainbow Trout density and dispersal were characterized in the Oklahoma portion of Spavinaw Creek during a similar timeframe to this study. Wolf and Brewer (2021) tracked PIT-tagged individuals at approximately 2-week intervals from November 2018 to September 2019 using a mobile PIT array. Tracking indicated some dispersal throughout Spavinaw Creek but most (~90%) Rainbow Trout that were detected remained within a 2-km stream reach surrounding the stocking location.…”

Section: Methodsmentioning

confidence: 99%

“…Rainbow Trout crayfish consumption was quantified following the general methods of Snow et al (2019). We estimated the weekly abundance of Rainbow Trout present using the initial estimated stocking number and average apparent weekly survival rate for Rainbow Trout in Spavinaw Creek (Wolf and Brewer 2021). Additional stocking events and estimated weekly mortalities were used to adjust the total.…”

Section: Methodsmentioning

confidence: 99%

See 4 more Smart Citations

Seasonal Diet and Habitat Use of Large, Introduced Rainbow Trout in an Ozark Highland Stream

Rodger¹,

Wolf

Starks³

et al. 2021

N American J Fish Manag

Self Cite

View full text Add to dashboard Cite

Stocking of Rainbow TroutOncorhynchus mykiss commonly provides seasonal or mitigation fisheries; however, these fish are usually small and ecosystem effects are spatially or temporally limited. Yet agencies receive requests to stock Rainbow Trout in relatively natural settings (i.e., not tailwater or mitigation fisheries), where introductions may have greater ecosystem consequences. The size of introduced fish is an important factor in determining biotic interactions with native species; therefore, our objectives were to assess the seasonal feeding ecology and microhabitat use of large ( 265-530 mm TL) nonnative Emmerson strain Rainbow Trout in a relatively unaltered, groundwater-influenced, warmwater stream of the Ozark Highlands. Rainbow Trout consumed a variety of prey; however, diets differed between cool (winter and spring) and warm (summer) seasons. Cool-season Rainbow Trout exhibited a mixed feeding strategy, with individual specialization on crayfishes and fishes and generalist feeding on Ephemeroptera and Diptera, but Gastropoda were the dominant prey. Feeding strategy in the warm season switched to individual specialization on numerous prey types. Overall, larger prey resources were important components of Rainbow Trout diets. Piscivory was relatively high in both seasons, and crayfishes were one of the most important prey types across seasons. Selection of coarse substrates and deeper-water microhabitats (>0.95 m) was similar between seasons. Rainbow Trout selected the lowest-velocity microhabitats available during the warm season and moderate velocities in the cool season. Rainbow Trout were five times more likely to be associated with cover in the warm season. Due to their higher temperature tolerance, Emmerson strain Rainbow Trout may persist in Ozark Highland streams, where they disrupt local food webs and occupy habitat otherwise selected by native fish, such as Neosho Smallmouth Bass Micropterus dolomieu velox. If native species conservation is a priority for agencies, then caution regarding Rainbow Trout stockings may be warranted.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 96%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 3 more Smart Citations

Seasonal Diet and Habitat Use of Large, Introduced Rainbow Trout in an Ozark Highland Stream

Rodger¹,

Wolf

Starks³

et al. 2021

N American J Fish Manag

Self Cite

View full text Add to dashboard Cite

show abstract

Evaluation of Visual Implant Elastomer, PIT, and p‐Chip Tagging Methods in a Small‐Bodied Minnow Species

Moore

Brewer

2021

N American J Fish Manag

Self Cite

View full text Add to dashboard Cite

Reliable fish tagging methods are needed to conduct studies (e.g., movement, habitat, abundance) that inform conservation and management decisions; however, dependable tagging approaches are lacking for many small‐bodied fishes. Therefore, our study objective was to determine survival, tag retention (visible implant elastomer [VIE], PIT, or light‐activated microtransponder [“p‐Chip”]) and tagging effects on short‐term growth of the federally threatened Arkansas River Shiner Notropis girardi. We also examined the use of anesthesia to reduce fish mortality (i.e., reduce handling time) and improve tagging efficiency. Fish tagged with p‐Chips had the highest survival (87%), whereas VIE‐tagged fish had the second highest survival (67%). Visible implant elastomer tags were retained in our fish 88% of the time, and retention was also high using p‐Chips (72%). Location of the VIE tag did not significantly affect survival or retention rates. Survival of PIT‐tagged fish significantly increased from 53% to 83% when handling time was reduced; however, tag retention was relatively low in both cases (50% and 45%, respectively). The majority of tagged fish across experiments (83–100%) gained weight regardless of tag type. If the research or management goal is to tag Arkansas River Shiner or similar species with individual identification, p‐Chips appear to be an appropriate tag. Particularly if cost is limiting or higher tag retention is needed, VIE tags would also be appropriate for batch tagging (i.e., no individual identification). Additional studies to broaden application of tagging to other small‐bodied species would be beneficial.

show abstract

Assessing downstream aquatic habitat availability relative to headwater reservoir management in the Henrys Fork Snake River

Morrisett

Kirk²,

Null

2023

River Research & Apps

View full text Add to dashboard Cite

Reservoirs are sometimes managed to meet agricultural and other water demands, while also maintaining streamflow for aquatic species and ecosystems. In the Henrys Fork Snake River, Idaho (USA), irrigation‐season management of a headwater reservoir is informed by a flow target in a management reach ~95 km downstream. The target is in place to meet irrigation demand and maintain aquatic habitat within the 11.4 km management reach and has undergone four flow target assignments from 1978 to 2021. Recent changes to irrigation‐season management to maximize reservoir carryover warranted investigation into the flow target assignment. Thus, we created a streamflow‐habitat model using hydraulic measurements, habitat unit mapping, and published habitat suitability criteria for Brown Trout (Salmo trutta), Rainbow Trout (Oncorhynchus mykiss), and Mountain Whitefish (Prosopium williamsoni). We used model output to compare habitat availability across two management regimes (1978–2017 and 2018–2021). We found that efforts to minimize reservoir releases in 2018–2021 did not reduce mean irrigation‐season fish habitat relative to natural flow, but did reduce overall fish habitat variability during the irrigation season compared to streamflow management in 1978–2017. Field observations for this research led to an adjusted flow target in 2020 that moved the target location downstream of intervening irrigation diversions. Using our model output, we demonstrated that moving the location of the target to account for local irrigation diversions will contribute to more consistently suitable fish habitat in the reach. Our study demonstrates the importance of site selection for establishing environmental flow targets.

show abstract

Survival and Movement Patterns of Rainbow Trout Stocked in a Groundwater‐Influenced Warmwater Stream

Cited by 4 publications

References 53 publications

Seasonal Diet and Habitat Use of Large, Introduced Rainbow Trout in an Ozark Highland Stream

Seasonal Diet and Habitat Use of Large, Introduced Rainbow Trout in an Ozark Highland Stream

Evaluation of Visual Implant Elastomer, PIT, and p‐Chip Tagging Methods in a Small‐Bodied Minnow Species

Assessing downstream aquatic habitat availability relative to headwater reservoir management in the Henrys Fork Snake River

Contact Info

Product

Resources

About