Maximum Daily Consumption and Specific Daily Metabolic Demand of Juvenile Flathead Catfish (<i>Pylodictis olivaris</i>)

Bourret, Samuel L.; Tingley, Ralph W.; Kanno, Yoichiro; Vokoun, Jason C.

doi:10.1080/02705060.2008.9664218

Cited by 12 publications

(15 citation statements)

References 20 publications

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“…Based solely on basal metabolic demand 1,000 unexploited individuals would require 100,600,000 more calories during a 200 day season than 1,000 exploited individuals. This caloric demand is equivalent to the caloric content of 86.7 kg of Bluegill ( Lepomis macrochirus ) [ 51 ] or 142.5 kg of Fathead Minnow ( Pimephales promelas) [ 52 ]. The effects that such energetic differences among exploited and unexploited individuals have on a systems trophic dynamics would of course be modulated by system productivity and other factors.…”

Section: Resultsmentioning

confidence: 99%

Differences in the Metabolic Rates of Exploited and Unexploited Fish Populations: A Signature of Recreational Fisheries Induced Evolution?

et al. 2015

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Non-random mortality associated with commercial and recreational fisheries have the potential to cause evolutionary changes in fish populations. Inland recreational fisheries offer unique opportunities for the study of fisheries induced evolution due to the ability to replicate study systems, limited gene flow among populations, and the existence of unexploited reference populations. Experimental research has demonstrated that angling vulnerability is heritable in Largemouth Bass Micropterus salmoides, and is correlated with elevated resting metabolic rates (RMR) and higher fitness. However, whether such differences are present in wild populations is unclear. This study sought to quantify differences in RMR among replicated exploited and unexploited populations of Largemouth Bass. We collected age-0 Largemouth Bass from two Connecticut drinking water reservoirs unexploited by anglers for almost a century, and two exploited lakes, then transported and reared them in the same pond. Field RMR of individuals from each population was quantified using intermittent-flow respirometry. Individuals from unexploited reservoirs had a significantly higher mean RMR (6%) than individuals from exploited populations. These findings are consistent with expectations derived from artificial selection by angling on Largemouth Bass, suggesting that recreational angling may act as an evolutionary force influencing the metabolic rates of fishes in the wild. Reduced RMR as a result of fisheries induced evolution may have ecosystem level effects on energy demand, and be common in exploited recreational populations globally.

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Section: Resultsmentioning

confidence: 99%

Differences in the Metabolic Rates of Exploited and Unexploited Fish Populations: A Signature of Recreational Fisheries Induced Evolution?

et al. 2015

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“…Assuming there is no local adaptation to temperatures, a lack of feeding by Flathead Catfish and minimal prey activity should occur at temperatures <10 C (Fast and Momot 1973;Brown and Fitzpatrick 1978;Bourret et al 2008). In the upper Gila River, our lower elevation sites had over a month (40 d) longer with water temperatures greater than this 10 C threshold than did the upper sites.…”

Section: Discussionmentioning

confidence: 99%

“…Given that juvenile Flathead Catfish (<100 mm) are primarily insectivores (Etnier and Starnes 1993;Jackson 1999), they were excluded from bioenergetics modeling. Feeding was assumed to occur only when water temperatures were above 10 C because Flathead Catfish feeding and movement have not been documented at lower temperatures (Daugherty and Sutton 2005;Bourret et al 2008). Also, prey activity is minimal to none below 10 C (Fast and Momot 1973;Brown and Fitzpatrick 1978).…”

Section: Methodsmentioning

confidence: 99%

Introduced Flathead Catfish Consumptive Demand on Native Fishes of the Upper Gila River, New Mexico

Hedden

Gido

Whitney

2016

N American J Fish Manag

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Predation by nonnative fish is often cited as a leading cause of declining native fish populations, but quantifying these negative interactions is difficult. Bioenergetics modeling provides a tool to estimate consumptive demand of nonnative species and to identify those that pose the greatest threats to native biota. We used bioenergetics modeling to estimate the consumptive demand of Flathead Catfish Pylodictis olivaris on native fishes in the upper Gila River, New Mexico, across an elevational gradient. Model results were coupled with measured densities and size structure of Flathead Catfish populations, as well as water temperatures, to predict its predatory threat. Potential consumption was highest at lower elevation sites because of higher water temperatures, but actual consumption was highest at mid‐elevation sites because of the prevalence of larger individuals there. Potential annual consumptive demand of Flathead Catfish on native fish across our nine sampling sites ranged from 0.0 to 3.1 g/m2, which exceeded native fish productivity at one site. Our results identify areas within the upper Gila River where introduced Flathead Catfish consumption is likely to negatively impact native fish populations.

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“…The seasonal patterns in consumption predicted by the general bioenergetics model were consistent with laboratory studies on juvenile flathead catfish. Bourret et al [24] found that daily consumption of juvenile flathead catfish increased with higher temperatures and remained elevated at high temperatures (32°C). Bourret et al [24] also found that consumption of juvenile flathead catfish declined under 19°C with limited consumption below 15°C.…”

Section: Discussionmentioning

confidence: 99%

“…Bourret et al [24] found that daily consumption of juvenile flathead catfish increased with higher temperatures and remained elevated at high temperatures (32°C). Bourret et al [24] also found that consumption of juvenile flathead catfish declined under 19°C with limited consumption below 15°C. Our simulations predicted that the majority of flathead catfish consumption occurred from late May through August when temperatures were above 25°C and minimal consumption occurred between October and March when average temperatures were below 19°C.…”

Section: Discussionmentioning

confidence: 99%

Consumption and Growth Patterns of Flathead Catfish Derived From a Bioenergetics Model

Tetzlaff

Flowers²,

Pine³

2010

TOFISHSJ

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Bioenergetics models offer a useful framework for assessing the consumptive demand on ecosystems from nonnative fish. Consumption estimates from bioenergetics models can be combined with estimates of population abundance to quantify population-level consumption. This study applies a new bioenergetics modeling framework, developed by Walters and Essington (this volume), to estimate bioenergetics parameters using field data commonly collected from population monitoring programs. We used growth increment and size-at-age data to estimate the parameters of the bioenergetics model described by Walters and Essington (this volume) for an introduced population of Pylodictis olivaris from the Neuse River, North Carolina. The model fit the observed growth data well and predictions of consumption patterns were consistent with observed feeding patterns. The estimated consumption pattern from the general bioenergetics model represents the first characterization of adult flathead catfish consumption. Through use of capture-recapture data, the Walters and Essington bioenergetics model is able to integrate consumption estimates with growth and demographic data. Although further validation of the model is necessary, the modeling framework provides a straightforward approach to assessing the consumptive demand of fish populations.

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Maximum Daily Consumption and Specific Daily Metabolic Demand of Juvenile Flathead Catfish (Pylodictis olivaris)

Cited by 12 publications

References 20 publications

Differences in the Metabolic Rates of Exploited and Unexploited Fish Populations: A Signature of Recreational Fisheries Induced Evolution?

Differences in the Metabolic Rates of Exploited and Unexploited Fish Populations: A Signature of Recreational Fisheries Induced Evolution?

Introduced Flathead Catfish Consumptive Demand on Native Fishes of the Upper Gila River, New Mexico

Consumption and Growth Patterns of Flathead Catfish Derived From a Bioenergetics Model

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