Diet of Eagle Lake Rainbow Trout in Lake DeSmet, Wyoming

Hubert, Wayne A.; Gipson, Robert D.; McDowell, Robert A.; Stewart, A.

doi:10.1577/1548-8675(1994)014<0457:doelrt>2.3.co;2

Cited by 12 publications

(13 citation statements)

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“…At the population level in low-order streams, rainbow trout display different feeding strategies throughout the year, being highly flexible and shifting their niche width. This feeding plasticity was also observed in Chilean Patagonian streams (Arismendi et al 2011) and North American lakes (Hubert & Gipson 1994). According to Amunsden (1995), this feeding flexibility depends on different factors such as prey type characteristics, seasonal changes in resource supply, availability and abundance of prey and food-habitat utilisation.…”

Section: Discussionmentioning

confidence: 57%

“…This feeding plasticity was also observed in Chilean Patagonian streams (Arismendi et al . ) and North American lakes (Hubert & Gipson ). According to Amunsden (), this feeding flexibility depends on different factors such as prey type characteristics, seasonal changes in resource supply, availability and abundance of prey and food–habitat utilisation.…”

Section: Discussionmentioning

confidence: 99%

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Feeding strategy of the non‐native rainbow trout,Oncorhynchus mykiss, in low‐orderPatagonian streams

Prinzio

Miserendino

Casaux

2013

Fisheries Management Eco

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The dietary composition and feeding strategy of rainbow trout, Oncorhynchus mykiss (Walbaum), in two low‐order Patagonian streams were studied. Benthic macroinvertebrate availability was estimated in both riffles and pools. Fish stomach contents were examined to determine prey richness and diversity, prey electivity, food‐niche width, and the feeding strategy employed by trout throughout the year. Availability of benthos varied seasonally with Ephemeroptera, Trichoptera, Plecoptera and Diptera species dominating. Rainbow trout diet was composed mainly of benthic macroinvertebrates, followed by terrestrial insects, fish, algae and plants. Different trout size classes segregated the use of food resources to reduce predation pressure. Elected prey included organisms displaying no to high mobility. A high feeding plasticity allows trout to buffer changes in food availability by switching from a specialised to a generalised feeding behaviour. Consequently, trout may exploit abundant but temporary food resources opportunistically, which would explain their marked expansion in Patagonian environments.

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Section: Discussionmentioning

confidence: 57%

Section: Discussionmentioning

confidence: 99%

Feeding strategy of the non‐native rainbow trout,Oncorhynchus mykiss, in low‐orderPatagonian streams

Prinzio

Miserendino

Casaux

2013

Fisheries Management Eco

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“…For example, Haddix and Budy (2005) found that Rainbow Trout in Flaming Gorge Reservoir, Utah-Wyoming, performed poorly overall, consumed primarily aquatic invertebrates and zooplankton, and rarely demonstrated an ontogenetic shift to piscivory at larger sizes. In addition, the Rainbow Trout strain that is stocked into Scofield Reservoir likely originates from the Eagle Creek (California) strain, whose diet does not contain fish prey (Hubert et al 1994;Wagner 1996). Consequently, it is unsurprising that these Rainbow Trout contributed little to the biological control of Utah Chub in Scofield Reservoir.…”

Section: Sizeclassmentioning

confidence: 99%

Earning their Stripes: The Potential of Tiger Trout and Other Salmonids as Biological Controls of Forage Fishes in a Western Reservoir

Winters

Budy

Thiede

2017

N American J Fish Manag

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Maintaining a balance between predator and prey populations can be an ongoing challenge for fisheries managers, especially in managing artificial ecosystems such as reservoirs. In a high‐elevation Utah reservoir, the unintentional introduction of the Utah Chub Gila atraria and its subsequent population expansion prompted managers to experimentally shift from exclusively stocking Rainbow Trout Oncorhynchus mykiss to also stocking tiger trout (female Brown Trout Salmo trutta × male Brook Trout Salvelinus fontinalis) and Bonneville Cutthroat Trout O. clarkii utah (hereafter, Cutthroat Trout) as potential biological control agents. We measured a combination of diet, growth, temperature, and abundance and used bioenergetic simulations to quantify predator demand versus prey supply. Utah Chub were the predominant prey type for tiger trout, contributing up to 80% of the diet depending on the season. Utah Chub represented up to 70% of the total diet consumed by Cutthroat Trout. Although Utah Chub dominated the fish biomass in the reservoir, we still estimated abundances of 238,000 tiger trout, 214,000 Cutthroat Trout, and 55,000 Rainbow Trout. Consequently, when expanded to the population level of each predator, tiger trout and Cutthroat Trout consumed large quantities of Utah Chub on an annual basis: tiger trout consumed 508,000 kg (2,660 g/predator) of the standing prey population, and Cutthroat Trout consumed an estimated 322,000 kg (1,820 g/predator). The estimated combined consumption by Cutthroat Trout and tiger trout exceeded the estimate of Utah Chub annual production. As such, our results suggest that the high rates of piscivory exhibited by Cutthroat Trout and tiger trout in artificial lentic ecosystems are likely sufficient to effectively reduce the overall abundance of forage fishes and to prevent forage fishes from dominating fish assemblages. Collectively, this research provides the first documented findings on tiger trout ecology and performance, which will aid managers in designing and implementing the best stocking strategy to optimize sport fish performance, control undesirable forage fish, and enhance and maintain angler satisfaction. Received April 1, 2016; accepted November 8, 2016 Published online March 8, 2017

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“…The tendency for rainbow trout to consume large‐bodied Daphnia sp. (>1.3 mm) in these waters is well documented (King 1975; Wurtsbaugh et al 1975; Marrin and Erman 1982; Schneidervin and Hubert 1987; Hubert et al 1994; Tabor et al 1996). Because Daphnia densities tend to be higher in the offshore epilimnion than in deeper (; ; Wurtsbaugh et al 1975) and nearshore waters (Tabor and Wurtsbaugh 1991), use of the epilimnion by rainbow trout maximizes their encounter rates with Daphnia.…”

Section: Discussionmentioning

confidence: 84%

Comparison of Horizontal Acoustic and Purse-Seine Estimates of Salmonid Densities and Sizes in Eleven Wyoming Waters

Yule

2000

North American Journal of Fisheries Management

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Evaluations of stocking programs for rainbow trout Oncorhynchus mykiss and cutthroat trout O. clarki in reservoirs and lakes of the western United States are typically made by estimating angler catch rates and total catch of stocked trout. Because these estimates are derived through expensive creel surveys, evaluations are infrequent. Trout management could be improved if a rapid, reliable technique to assess population levels was developed. The objective of this research was to determine if horizontal acoustic estimates of salmonid densities and mean lengths were correlated with data collected simultaneously with a 9.1‐m‐deep purse seine. During daylight hours of summer (June–September) trout were found in offshore surface waters and typically accounted for greater than 90% of the fish captured there. Salmonids seldom accounted for more than 10% of nearshore trap‐net catches. This spatial segregation of salmonids offshore and nonsalmonids nearshore simplified interpretation of acoustic data. Side‐looking acoustic and purse‐seine estimates of salmonid densities were correlated (r = 0.87, N = 14) across the range of densities encountered (0.4–81.2 fish/ha). Salmonids captured offshore were typically large (>200 mm standard length), suggesting that newly stocked trout were underrepresented by purse‐seine and acoustics samples. Side‐looking estimates of mean salmonid lengths, transformed from target strengths, were within 50 mm of mean lengths captured by purse seine in 9 of 11 cases. Both purse seining and horizontal acoustics have strengths and weaknesses as sampling techniques, but when used together, the two methods provide invaluable information about salmonid densities, lengths, and body conditions. With good weather, a crew of six people could estimate trout numbers in a small impoundment (<1,500 ha) in 1–2 d. Data collection techniques described in this paper are likely to be effective when sampling salmonid populations in many waters of western North America.

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Diet of Eagle Lake Rainbow Trout in Lake DeSmet, Wyoming

Cited by 12 publications

References 0 publications

Feeding strategy of the non‐native rainbow trout,Oncorhynchus mykiss, in low‐orderPatagonian streams

Feeding strategy of the non‐native rainbow trout,Oncorhynchus mykiss, in low‐orderPatagonian streams

Earning their Stripes: The Potential of Tiger Trout and Other Salmonids as Biological Controls of Forage Fishes in a Western Reservoir

Comparison of Horizontal Acoustic and Purse-Seine Estimates of Salmonid Densities and Sizes in Eleven Wyoming Waters

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