Size‐specific growth of bluegill, largemouth bass and channel catfish in relation to prey availability and limnological variables

Shoup, Daniel E.; Callahan, Sean; Wahl, David H.; Pierce, Clay L.

doi:10.1111/j.1095-8649.2006.01204.x

Cited by 36 publications

(36 citation statements)

References 50 publications

(75 reference statements)

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“…Relative weight ranged from 66 to 113, which is similar to the range of 73-111 reported for other small lakes (Mitzner 1999;Mosher 1999;Parrett et al 1999). Because I used growth increments instead of mean TL at age to compare growth among populations, I found only two studies using similar methods (Putman et al 1995;Shoup et al 2007), and only one (Shoup et al 2007) that determined growth in lakes. Shoup et al (2007) used initial lengths of 300 and 450 mm for Illinois lakes instead of the 280 and 410 mm used in this study.…”

Section: Discussionmentioning

confidence: 99%

“…Measurements were made on basal spine sections, while ages were determined from articulating process sections to ensure that all annuli were counted (Marzolf 1955;Buckmeier et al 2002). The predicted growth increment (INC) for fish with initial lengths of 280 mm (stock size, INC 280 ) and 410 mm (quality size, INC 410 ) was estimated from these regressions and used to compare growth among lakes and years; this is similar to methods used by Putman et al (1995) and Shoup et al (2007). Fish from the previous fall's stocking were excluded from the analysis based on their age, because their last growth increment occurred while in the rearing ponds.…”

Section: Methodsmentioning

confidence: 99%

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Variable Responses of Channel Catfish Populations to Stocking Rate: Density‐Dependent and Lake Productivity Effects

Michaletz¹

2009

N American J Fish Manag

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Put-grow-take fisheries for channel catfish Ictalurus punctatus are popular in many small impoundments but are costly because fingerling (.175 mm total length [TL]) stockings are usually necessary to maintain these fisheries. Stocking the appropriate number of fish is important for making efficient use of these hatchery products and for creating desirable fisheries. The effect of stocking rate on channel catfish populations was evaluated by examining 60 small impoundments that had been assigned to one of three annual stocking rates (12, 37, or 74 fingerlings/ha). As channel catfish stocking rate increased, catch per unit effort (CPUE, number of fish per 3-d tandem hoop-net series) and total annual mortality increased, while proportional size distribution (PSD, formerly proportional stock density), PSD for fish 508 mm or longer, relative weight, and annual growth increments decreased; these results suggest that density-dependent processes were important. However, 10-fold differences in CPUE and threefold differences in size structure indices and growth increments were common among lakes stocked at the same rate. Further analysis revealed that CPUE and lake productivity (indexed by chlorophyll-a concentration) were important variables in explaining differences in size structure, condition, and growth among populations. Because of the highly variable response, appropriate stocking rates need to be determined for each lake. I propose comparing growth increments of individuals within a lake to a statewide standard to determine the relative growth rate for the lake. Stocking rates should be reduced for channel catfish populations that are growing slowly but could be increased for fast-growing populations.*

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Variable Responses of Channel Catfish Populations to Stocking Rate: Density‐Dependent and Lake Productivity Effects

Michaletz¹

2009

N American J Fish Manag

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“…Our lower catch rates by DC electrofishing of channel catfish and sunfish suggests this gear may not sample some of the most abundant and important species in Illinois at the same rate of AC electrofishing (Willink and Veraldi 2009), possibly impacting future management decisions regarding these species once DC electrofishing becomes a state-wide sampling method. Panfish species are popular sportfish and represent an ecologically important group in impoundments as these species are a primary food source for largemouth bass and channel catfish (Nyberg 1971;Shoup et al 2007). Furthermore, we found no relationship between the electrofishing gears in sunfish CPUE, which will restrict comparison of future DC sampling data to historical data obtained using AC electrofishing.…”

Section: Discussionmentioning

confidence: 99%

A comparison of electrofishing methods and fyke netting to produce reliable abundance and size metrics

Porreca

Pederson

Laursen

et al. 2013

Journal of Freshwater Ecology

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Because different fishing gears may introduce different degrees of bias, we set out to compare two active sampling methods (alternating current (AC) and pulsed direct current (DC) boat electrofishing) and one passive method (modified fyke netting) in sampling sportfish in a midwestern US reservoir. Currently, the Illinois Department of Natural Resources uses AC electrofishing to sample reservoirs but a switch to DC is underway. Understanding how this switch will impact fisheries data is critical for future management decisions. We found catch per unit effort (CPUE) for all sportfish combined was greater (p < 0.0001) with AC electrofishing than DC electrofishing. Though not significant, largemouth bass (Micropterus salmoides) were sampled at a higher rate using DC electrofishing. Channel catfish (Ictalurus punctatus, p ¼ 0.0494) and sunfish (Lepomis spp., p < 0.0001) were sampled at a significantly higher rate with AC electrofishing. We found a positive relationship between AC and DC electrofishing CPUE for largemouth bass (r 2 ¼ 0.702); however, no relationship between AC electrofishing and DC electrofishing was found for sunfish CPUE. Length frequency distributions of sunfish were significantly different for each gear used. The lack of a relationship between AC and DC electrofishing CPUE for sunfish species suggests data from future DC electrofishing may not be comparable to historical data obtained from AC electrofishing.

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“…In North America, the largemouth bass and Lepomis spp., particularly the bluegill, Lepomis macrochirus Rafinesque, 1819 (a sister species of the pumpkinseed sunfish not present in the Iberian Peninsula), are frequently sympatric in ponds and natural lakes (Shoup et al 2007), and inter-specific interactions are often strong and dependent on size, since bass can use Lepomis spp. as prey but both taxa may share the same feeding resources at smaller sizes (Olson et al 1995).…”

Section: Introductionmentioning

confidence: 99%

Feeding ecology of non-native centrarchids (Actinopterygii: Perciformes: Centrarchidae) in two Iberian reservoirs with contrasting food resources

Godinho

Ferreira

2014

Acta Ichthyol. Piscat

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Background. Two North American fish species have been particularly successful in Iberian reservoirs, the largemouth black bass, Micropterus salmoides (Lacepède, 1802) and the pumpkinseed, Lepomis gibbosus (Linnaeus, 1758), but information on their ecology is still scarce, limiting their effective management and control. To increase the knowledge about the ecological mechanisms underlying bass and pumpkinseed invasion of freshwater systems, their feeding ecology and population descriptors are contrasted in two Iberian reservoirs differing in available resources. Materials and methods. The studied reservoirs, situated in tributary streams of the Guadiana River, were sampled during the same months for a total of eight times, spanning two years. Fish samples were made by using electrofishing from a boat in the littoral area and trammel nets. Zooplankton and littoral benthic invertebrates were sampled concurrently with fish sampling. Fish diet was studied by examining individual stomach contents. The dominance of the different items in the diet of each species size-class was determined using the modified Costello diagram, diet overlap was estimated with Pianka's index and prey selection was assessed with the Manly-Chesson's alpha. Back-calculated length-at-age and body condition were also assessed for each fish. Results. Invertebrates were dominant in the diet of pumpkinseed whereas invertebrates and pumpkinseed dominated the diet of bass. Both species demonstrated an overall dietary opportunism and a considerable food spectrum, with pumpkinseed eating fish and macrophytes. Feeding selectivity was observed that varied with species, size-class, reservoir and sampling period. Fish became the main prey for larger bass and the shift to piscivory was related to pumpkinseed availability. The dietary changes associated with pumpkinseed growth in native environments were not observed in the reservoirs. Dietary overlaps varied with sampling period, being frequently high. Differences in abundance, growth and body condition of bass and pumpkinseed were evident between reservoirs. Conclusion. The ability to use several food items and to feed opportunistically likely facilitated the widespread success of the centrarchids in variable Iberian reservoirs. Moreover, our results seem to support the occurrence of resource competition between pumpkinseed size classes and between smaller bass and pumpkinseed.

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Size‐specific growth of bluegill, largemouth bass and channel catfish in relation to prey availability and limnological variables

Cited by 36 publications

References 50 publications

Variable Responses of Channel Catfish Populations to Stocking Rate: Density‐Dependent and Lake Productivity Effects

Variable Responses of Channel Catfish Populations to Stocking Rate: Density‐Dependent and Lake Productivity Effects

A comparison of electrofishing methods and fyke netting to produce reliable abundance and size metrics

Feeding ecology of non-native centrarchids (Actinopterygii: Perciformes: Centrarchidae) in two Iberian reservoirs with contrasting food resources

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