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Effects of the polyculture of juvenile stages of Northern pike [Esox lucius L.] and sturgeon in recirculating systems

100%

Szczepkowski M., Szczepkowska B.

Electronic Journal of Polish Agricultural Universities. Series Fisheries

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2006

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tom 09

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nr 1

The possibility of using sturgeon as a stock component during the rearing of pike (Esox lucius L.) fry in tanks was determined. The experiment was conducted in two stages. In the first, pike fry with a body weight of 0.1 g were reared in monoculture and polyculture with a sturgeon component comprising 40 and 80% of the pike biomass. In the second phase, pike fry weighing an average of 3 g were reared in monoculture and polyculture with a sturgeon component comprising 10 and 20% of the pike biomass. The introduction of the sturgeon improved feed utilization and lowered feed conversion ratios from 1.4 to 0.8 in the older pike group (statistically significant difference at P < 0.05). In experiment stage II, the pike fry reared in polyculture with sturgeon attained statistically significant (P < 0.05) higher body growth in comparison with the monoculture variant. Pike survival was the lowest in the monoculture at 72.1 and 91.4% in stages I and II of the experiment, respectively. With regard to the smaller fry, this was due primarily to cannibalism with such losses comprising over 50% of the total losses throughout rearing. Survival in the polycultures was as much as 12% higher. The authors believe that the possibility of rearing these two species together stems from their different behavior and feeding strategy. Another benefit was that the labor-intensive removal of feed not consumed by the pike fry was lowered which meant that there was minimal interference in the tank during rearing.

2

Effectiveness of grass carp - dominated fish polyculture

84%

Szumiec J.

Acta Scientiarum Polonorum. Piscaria

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2002

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tom 01

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nr 1

3

Preliminary studies of intensive wels catfish [Silurus glanis L.] and sturgeon [Acipenser sp.] pond cultivation

84%

Ulikowski D., Szczepkowski M., Szczepkowska B.

Archives of Polish Fisheries

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2003

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tom 11

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nr 2

Studies were conducted on intensive monoculture and polyculture of wels catfish and sturgeon in ponds. The initial average body weight of the fish in monoculture and polyculture was similar (wels catfish - approximately 100 g; sturgeon-approximately 720 g), and the biomass was equal in each pond (approximately 30.7 kg). The fish were fed trout granulate for two months. The final survival rate was the same in both the monoculture and polyculture (wels catfish - 99.5%; sturgeon - 100%). Statistically significant differences (p < 0.05) were observed between the fish growth in monoculture and polyculture. Wels catfish grew faster in polyculture, with an average body weight of 349.1 g and a specific growth rate (SGR) of 2.0 % day⁻¹. In monoculture these figures were 276.1 g and 1.6 % day⁻¹, respectively. Sturgeon grew faster in monoculture, with an average body weight of 1229.2 g, and an SGR of 0.86 % day⁻¹, while in polyculture these values were 854.2 g and 0.28 % day⁻¹, respectively. The intensive cultivation of wels catfish with sturgeon in pond polyculture influenced their growth, but not survival rates.

4

Food biology of one-, two- and three-year-old tench in polycultures with carp and herbivorous fish

84%

Sukop I., Adamek Z.

Polskie Archiwum Hydrobiologii

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1995

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tom 42

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nr 1-2

5

Zooplankton and zoobenthos development in ponds stocked with tench fry in mono- and polycultures with herbivorous fish

67%

Adamek Z., Sukop I.

Polskie Archiwum Hydrobiologii

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1995

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tom 42

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nr 1-2

Ograniczanie wyników

2 Polskie Archiwum Hydrobiologii

1 Acta Scientiarum Polonorum. Piscaria

1 Archives of Polish Fisheries

1 Electronic Journal of Polish Agricultural Universities. Series Fisheries

2 Adamek Z.

2 Sukop I.

2 Szczepkowska B.

2 Szczepkowski M.

1 Szumiec J.

1 Ulikowski D.

1 2006

1 2003

1 2002

2 1995

Effects of the polyculture of juvenile stages of Northern pike [Esox lucius L.] and sturgeon in recirculating systems

Effectiveness of grass carp - dominated fish polyculture

Preliminary studies of intensive wels catfish [Silurus glanis L.] and sturgeon [Acipenser sp.] pond cultivation

Food biology of one-, two- and three-year-old tench in polycultures with carp and herbivorous fish

Zooplankton and zoobenthos development in ponds stocked with tench fry in mono- and polycultures with herbivorous fish