Effects of Size at Stocking on Survival and Harvest of Channel Catfish

Storck, Ted W.; Newman, Dennis

doi:10.1577/1548-8675(1988)008<0098:eosaso>2.3.co;2

Cited by 36 publications

(41 citation statements)

References 7 publications

(8 reference statements)

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“…The ¢nal mean weights of individual ¢sh were inversely proportional to stocking density, i.e. The relationships between stocking density and the growth and yield parameters obtained in the present study agree closely with many reports on other cat¢sh species (Teng & Chua 1979;Hogendoom & Koops 1983;Storck & Newman 1988;Engle & Valder-rama 2001). Chowdhury, Saha, Islam and Das (2002) studied the e¡ects of three stocking densities on the production of Thai cat¢sh, Pangasius sutchi, in coastal impoundments in Bangladesh.…”

Section: Discussionsupporting

confidence: 91%

“…Chowdhury, Saha, Islam and Das (2002) studied the e¡ects of three stocking densities on the production of Thai cat¢sh, Pangasius sutchi, in coastal impoundments in Bangladesh. Similar results were reported with channel cat¢sh, Ictalurus punctatus, by Storck and Newman (1988) and Engle and Valderrama (2001). After 240 days of rearing, the average body weights were 821.5, 802.5 and 727.5 g at three stocking densities.…”

Section: Discussionsupporting

confidence: 85%

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Cage culture of sutchi catfish, Pangasius sutchi (Fowler 1937): effects of stocking density on growth, survival, yield and farm profitability

et al. 2006

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The sutchi cat¢sh, Pangasius sutchi (Fowler 1937) was grown at 10 stocking densities in cages suspended in a river-fed channel during the summer of 2000. Cat-¢sh ¢ngerlings (mean length 9.1^9.7 cm and mean weight 5.9^6.7 g) were stocked at densities of 60, 70, 80, 90, 100, 110, 120, 130, 140 and 150 ¢sh m À 3 . After 150 days, growth and yield parameters were studied and a simple economic analysis was carried out to calculate pro¢tability. The mean gross yield ranged from 15.6 AE 0.27 to 34.5 AE 0.44 kg m À 3 and the net yield ranged from 15.2 AE 0.22 to 33.5 AE 0.36 kg m À 3 and showed signi¢cant variations (Po0.05). The mean weights of ¢sh at harvest were inversely related to stocking density. Both gross and net yields were signi¢cantly di¡erent and were directly in£uenced by stocking density but the speci¢c growth rate, survival rate and feed conversion rate were una¡ected. Higher stocking density resulted in higher yield per unit of production cost and lower cost per unit of yield. The net revenue increased positively with increasing stocking density. A density of 150 ¢sh m À 3 produced the best production and farm economics among the densities tested in this experiment. Feed cost 5 BDT 18.0 kg À1 ; ¢ngerling cost 5 BDT 1.0 per ¢ngerling; exchange rate: USD 1.0 5 BDT 60.0. GYPC, gross yield per unit of cost; NYPC, net yield per unit of cost. Aquaculture Research, 2006, 37, 33^39 Stocking density of sutchi cat¢sh M M Rahman et al.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionsupporting

confidence: 85%

Cage culture of sutchi catfish, Pangasius sutchi (Fowler 1937): effects of stocking density on growth, survival, yield and farm profitability

et al. 2006

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“…4-6), total harvests in the cages were better predicted by the number of fish stocked in the cages (r 2 = 0.692) than by fish stocking biomass in the cages (r 2 = 0.210). Similar results have been observed with the African catfish (Clarias gariepinus) in ponds (Hogendoorn and Koops, 1983) and in cages (Hengsawat et al, 1997), O. niloticus in cages (Daungsawasdi et al, 1986) and channel catfish (Ictalurus punctatus) also in cages (Storck and Newman, 1988).…”

Section: Production Strategies Which Potentially Increased Nutrient Lsupporting

confidence: 80%

Carbon, nitrogen and phosphorus loadings from tilapia fish cages in Lake Malawi and factors influencing their magnitude

Gondwe

Guildford

Hecky

2011

Journal of Great Lakes Research

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“…Most populations are maintained by stocking of fingerlings (.175 mm total length [TL]) because natural recruitment is usually negligible as a result of predation (Marzolf 1957;Krummrich and Heidinger 1973;Spinelli et al 1985;Storck and Newman 1988). These stockings represent a substantial investment of fiscal and human resources for many management agencies (Michaletz and Dillard 1999).…”

mentioning

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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Effects of Size at Stocking on Survival and Harvest of Channel Catfish

Cited by 36 publications

References 7 publications

Cage culture of sutchi catfish, Pangasius sutchi (Fowler 1937): effects of stocking density on growth, survival, yield and farm profitability

Cage culture of sutchi catfish, Pangasius sutchi (Fowler 1937): effects of stocking density on growth, survival, yield and farm profitability

Carbon, nitrogen and phosphorus loadings from tilapia fish cages in Lake Malawi and factors influencing their magnitude

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

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