Food Habits and Feeding Periodicity in Two Sympatric Stonerollers (Cyprinidae)

Fowler, James F.; Taber, Charles A.

doi:10.2307/2425567

Cited by 22 publications

(22 citation statements)

References 12 publications

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Section: Introductionmentioning

confidence: 99%

“…The central stoneroller Campostoma anomalum (Family: Cyprinidae) is a grazing minnow that is often abundant throughout streams in the central and eastern USA, yet little is known about factors regulating their abundance. Although primarily herbivorous (Fowler & Taber 1985;Power et al 1988;Hargrave et al 2006), stonerollers can consume macroinvertebrates (Evans-White et al 2003) and larval fish (Johnson & Dropkin 1992). Thus, stonerollers might be less likely to be resource limited because of their broad diet.…”

Section: Introductionmentioning

confidence: 99%

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Density dependence of herbivorous central stoneroller Campostoma anomalum in stream mesocosms

Pennock

Gido

2016

Ecology of Freshwater Fish

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Herbivorous fish can have strong effects on stream ecosystem function by consuming primary producers and excreting limiting nutrients, but it is unclear whether they are resource limited. Thus, understanding factors regulating abundance of these fish might help predict ecosystem function. We used stream mesocosms to test whether populations of central stoneroller Campostoma anomalum exhibit density dependence across a range of typical densities and resource abundance found in Great Plains streams. We predicted that incrementally increasing stocking biomass from 3·7 to 24·9 g·m−2 would reduce standing stocks of resources resulting in lower growth of stocked fish. Fish growth (over 41 days) was compared to initial stocking biomass and primary production as well as standing stocks of algae and invertebrates using regression analysis. Mean growth of individuals was negatively associated with stocking biomass (Rnormaladj2 = 0·55; P = 0·02), as predicted. Contrary to our prediction, increases in fish biomass led to increased primary productivity (Rnormaladj2 = 0·31, P = 0·07), but resulted in no relationship among algal filament lengths (Rnormaladj2 = 0·00; P = 0·34), algal biomass (Rnormaladj2 = 0·12; P = 0·19) or invertebrate biomass (Rnormaladj2 = 0·03; P = 0·30). Thus, density dependence occurred without an apparent reduction in food resources. We hypothesised that stoneroller growth was possibly limited by competition for high‐quality algae or invertebrates, or behavioural interactions causing interference competition.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Density dependence of herbivorous central stoneroller Campostoma anomalum in stream mesocosms

Pennock

Gido

2016

Ecology of Freshwater Fish

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“…With their demonstrated ability to change the taxonomic composition of periphyton and their ability to produce large amounts of feces (Campostoma can consume as much as 27 % of their mass in algae daily) (Fowler & Taber, 1985), they may influence both the processing and storage of organic matter. Significantly, the production of their characteristic 'C' shaped fecal pellets could change the size of stored BPOM particles.…”

Section: Introductionmentioning

confidence: 99%

Grazing and the distribution of sediment particle sizes in artificial stream systems

Gardner

1993

Hydrobiologia

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Recent research has shown that grazing by the algivorous minnows of the genus Campostoma can have a significant effect on both structural and functional parameters in stream ecosystems, influencing algal height and type, primary productivity, carbon dynamics, bacterial biomass and the size fractionation of benthic organic matter. This study was undertaken to evaluate the effect of minnow grazing on benthic particulate organic matter (BPOM) under the controlled conditions available in experimental streams. For this study, four grazed and four ungrazed artificial streams were sampled for BPOM on two dates. The samples were partitioned into large, medium, fine and ultrafine fractions via wet filtration. Fish grazed systems had significantly larger percentages of the fine fraction and significantly smaller percentages of the ultrafine fraction. The ability of grazers to alter particle size distribution is important to overall stream organic matter dynamics because recent studies have shown the importance of particle size in determining bacterial numbers and activity, which in turn influence fundamental stream process like respiration and organic carbon dynamics.

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“…For each EFPC site and individual weight (or average weight for group of similar‐sized individuals), we used estimates of size‐specific relative growth determined by logistic growth equations. Ingestion rates have been measured as high as 27% of body weight in stonerollers (Fowler and Taber, ). Given uncertainties in our estimates of growth and periphyton diet concentrations, we created a growth multiplier ( g m ) and diet ratio ( C Fr ) to allow g and C F values to vary.…”

Section: Methodsmentioning

confidence: 99%

“…To calibrate the biodynamics model and solve for unknown parameter estimates, we used a combination of empirically derived and literature-derived ranges in parameters ( (Fowler and Taber, 1985). Given uncertainties in our estimates of growth and periphyton diet concentrations, we created a growth multiplier (g m ) and diet ratio (C Fr ) to allow g and C F values to vary.…”

Section: Biodynamics Modelmentioning

confidence: 99%

Scaling mercury biodynamics from individuals to populations: Implications of an herbivorous fish on mercury cycles in streams

et al. 2019

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Mercury (Hg) is a widespread environmental pollutant anthropogenically released into aquatic ecosystems where it is tightly retained and cycled through abiotic and biotic processes. Understanding the transport and fate of Hg, including the role of organisms in these cycles, is important. However, few studies, if any, have evaluated the role of macroconsumers in Hg cycling. This requires accounting for organismal regulation of body methylmercury (MeHg) via biodynamics and then scaling individual MeHg concentrations to the population level. Recent evidence suggests that MeHg concentrations will become decrease within an organism as it displays higher growth efficiency (i.e. somatic growth dilution [SGD] concept). However, the implications of individual concentrations, SGD, population size, and individual growth on ecosystem‐level mass‐storage and accumulation of MeHg are uncertain. We examined the influence of population size and individual growth on total MeHg standing stock and accumulation in stoneroller (Campostoma oligolepis) populations in a stream contaminated by Hg in east Tennessee, U.S.A. We assessed patterns in periphyton and stoneroller MeHg concentrations in relation to relative growth and population density to determine evidence of SGD and density‐dependent growth, respectively. We simulated the internal regulation of MeHg concentration in stonerollers using a biodynamic model, which was then scaled to the population level to analyse the effects of population density and growth on MeHg standing stock (μg/m2) in stoneroller populations and accumulation rates (i.e. flux, μg m−2 day−1) from periphyton communities to stonerollers. MeHg storage and flux in stoneroller populations were compared to standing stocks and methylation rates in periphyton communities. We found evidence of both density‐dependent and density‐independent growth patterns for stonerollers in East Fork Poplar Creek. Stoneroller MeHg concentrations were positively related to periphyton MeHg concentrations; however, evidence of SGD was equivocal. Total MeHg standing stock and accumulation in stoneroller populations was positively related to population density, irrespective of growth. Additionally, higher relative growth was positively related to a higher MeHg accumulation, regardless of density dependence. We found that the standing stock of MeHg in stoneroller populations could be as high as 32× the standing stock of MeHg in periphyton. Finally, the rate of accumulation of MeHg in stonerollers ranged from 5% to over 100% of previously documented methylation rates in periphyton. Our results suggest that abundant macroconsumers may play significant roles in contaminant cycles by mobilising considerable quantities of Hg, storing significant reservoirs of Hg and MeHg, and transferring MeHg to higher trophic levels. Furthermore, the implications of population size and growth of macroconsumers on the storage and flux of MeHg in streams are complicated and dependent upon age structure, density‐dependence, and MeHg concentrations. Our...

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Food Habits and Feeding Periodicity in Two Sympatric Stonerollers (Cyprinidae)

Cited by 22 publications

References 12 publications

Density dependence of herbivorous central stoneroller Campostoma anomalum in stream mesocosms

Density dependence of herbivorous central stoneroller Campostoma anomalum in stream mesocosms

Grazing and the distribution of sediment particle sizes in artificial stream systems

Scaling mercury biodynamics from individuals to populations: Implications of an herbivorous fish on mercury cycles in streams

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