Evaluation of Condition Indices for Estimation of Growth of Largemouth Bass and White Crappie

Gutreuter, Steve; Childress, W. Michael

doi:10.1577/1548-8675(1990)010<0434:eocife>2.3.co;2

Cited by 25 publications

(19 citation statements)

References 20 publications

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“…Additionally, mean length is not a good measure of growth because it could be small because of poor growth or high exploitation. Using W r to track CHANNEL CATFISH POPULATIONS populations is complicated by the difficulty of accurately weighing fish in the field (Gutreuter and Krzoska 1994) and this index may not accurately reflect growth rates (Gutreuter and Childress 1990). For this study, W r was correlated with growth increments for 2003 (INC 280 , r ¼ 0.50, P ¼ 0.0001, N ¼ 55 lakes; INC 410 , r ¼ 0.50, P ¼ 0.0001, N ¼ 55 lakes) but not for 2005 (INC 280 , r ¼ 0.26, P ¼ 0.08, N ¼ 48 lakes; INC 410 , r ¼ 0.28, P ¼ 0.06, N ¼ 47 lakes).…”

Section: Management Implicationsmentioning

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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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: Management Implicationsmentioning

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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“…Fishes of a given age, however, are not necessarily of the same size and thus should not be expected to grow at the same rate (Larkin et al, 1957). Size-specific growth rates (Larkin et al, 1957;Gutreuter & Childress, 1990;Putman et al, 1995) allow more meaningful comparisons between populations than do age-specific growth rates (Osenberg et al, 1988).…”

Section: Introductionmentioning

confidence: 99%

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

Shoup

Callahan

Wahl

et al. 2007

Journal of Fish Biology

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Growth of sympatric populations of three important sport fish species: bluegill Lepomis macrochirus, largemouth bass Micropterus salmoides and channel catfish Ictalurus punctatus, in 14 Illinois reservoirs was assessed in an attempt to relate size-specific growth to environmental conditions. Multiple regression relationships for most species and size classes explained a large percentage of the variation in growth. Growth of small bluegill (50 mm total length, L T ) showed a strong negative relationship with bluegill catch per unit effort (cpue), per cent littoral area and pH. Large bluegill (150 mm L T ) growth was negatively related to Daphnia spp. and benthic macroinvertebrate abundance and lake volume, and positively related to bluegill cpue. Growth of small (100 mm L T ) and large (250 mm L T ) largemouth bass was not well explained by any of the measured variables. Growth of both small (300 mm L T ) and large (450 mm L T ) channel catfish was strongly positively related to forage fishes and ichthyoplankton abundance, and per cent littoral area while negatively related to benthic macroinvertebrates. By identifying environmental conditions associated with increased growth rates, these models provide direction for managing fish populations and suggest testable hypotheses for future study of the complex interactions between environmental conditions and growth.

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“…Fisheries biologists responsible for Lake Erie walleye were interested in finding an easily measured index that could be used as part of their annual surveys to assess the growth, food consumption and prey availability conditions. Previous studies suggested W r and LSI should be related to growth and feeding of fish (Wege & Anderson 1978; Adams & McLean 1985; Gutreuter & Childress 1990; Willis, Guy & Murphy 1991; Blackwell et al. 2000).…”

Section: Discussionmentioning

confidence: 95%

Relationships among condition indices, feeding and growth of walleye in Lake Erie

Hartman¹,

Margraf²

2006

Fisheries Management Eco

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Condition indices are often used as surrogates of fish health, growth, and feeding and to compare ecological well-being among fish populations. In an effort to identify easily measured indices, growth and food consumption were compared with gonadal-somatic index, liver-somatic index (LSI), fat-somatic index and relative weight (W r ) for ages 1-3 walleye, Sander vitreus (Mitchill), in Lake Erie from 1986 to 1988. The LSI and W r were significantly correlated with growth rate or food consumption, but correlations were too small to be considered biologically meaningful. Furthermore, no consistent relationships between condition indices and growth or consumption were found among combinations of fish age and season. None of the indices are considered reliable surrogates for more laborious estimates of growth and food consumption for Lake Erie walleye. Significant relationships between W r and relative abundance of key prey species warrant further investigation.food consumption, growth rate, prey availability, relative weight, Sander, somatic index.

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Evaluation of Condition Indices for Estimation of Growth of Largemouth Bass and White Crappie

Cited by 25 publications

References 20 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

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

Relationships among condition indices, feeding and growth of walleye in Lake Erie

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