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Age structure of the smolts of the migratory morphotype of the brown trout [Salmo trutta m.trutta L.,1758] from the Gowienica River

100%

Antoszek O.

Acta Ichthyologica et Piscatoria

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1999

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tom 29

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nr 1

63-82

The present paper shows the age, mean length, and weight of smolts of the migratory morphotype of the brown trout, grown in the drainage area of the Gowienica River (Pomerania). The above parameters are given separately for both sexes and all age groups. Because the scales of the smolts were in the period of annual ring formation, the age determination was preceded by counting the annual rings and analysing the edge increments. The study was based on a total of 277 smolts acquired in four fishing seasons covering the years of 1980, 1982, 1983, and 1984.

2

Growth rate of the smolts of the migratory morphotype of the brown trout [Salmo trutta m.trutta L.,1758] from the Gowienica River

63%

Antoszek O., Chelkowski Z.

Acta Ichthyologica et Piscatoria

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1999

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tom 29

|

nr 1

83-91

A total of 277 smolts of the migratory morphotype of the brown trout from the Gowienica River (Pomerania) was examined. The present survey was based on four fishing seasons: 1980, 1982, 1983, and 1984. The aim of this study was to determine the relationship between the body length and the scale radius and to determine the growth rate based on the back reading method.

3

Fauna kragloustych i ryb rzeki Drawy w obszarze Drawienskiego Parku Narodowego

51%

Chelkowski Z., Chelkowska B., Antoszek O., Gancarczyk J.

Parki Narodowe

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1996

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nr 4

14-15

4

Cyclostomes and fishes of the drainage basin of the river Plociczna

51%

Chelkowski Z., Chelkowska B., Antoszek O.

Acta Ichthyologica et Piscatoria

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1997

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tom 27

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nr 2

79-111

Studies on the occurrence of cyclostomes and fishes of the drainage area of the river Płociczna were carried out in 1996. The following parameters were defined: constancy of occurrence (C), domination index (D), and fractions of the biomass (W) represented by individual species. The results were confronted with the data from the river Płociczna published by the other authors within 1986-1994. A total of 1 cyclostome and 32 fish species was presently recorded to inhabit the drainage area of the river Płociczna. In this number there were 1 cyclostome and 7 fishes which are protected species. The part of the drainage area of the Płociczna under study, constitutes a section of the Drawieński National Park. The species occurring in that part, as well as in its buffer zone were discussed.

5

Cyclostomates and fishes of the Drawa River within the limits of the Drawienski National Park

51%

Chelkowski Z., Chelkowska B., Antoszek O., Gancarczyk J.

Acta Ichthyologica et Piscatoria

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1996

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tom 26

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nr 2

3-33

Part of the lower Drawa River between Dubie Lake and the Płociczna River mouth, stretching for a distance of 38.8 km, belongs to the Drawieński National Park, established in 1990. Electrofishing conducted on the 8 river stretches within the park limits yielded a total of 26 fish species and one cyclostomate species. The leading species appeared to be the roach, with the domination level reaching 56.16%. The other abundant species were: burbot (D = 7.81%), silver bream (D = 6.88%), and perch (D = 5.95%). The remaining species occurred in smaller numbers. The Drawa River within the Park limits is inhabited by 3 species of the family Cyprinidae: minnow-Phoxinus phoxinus, schneider-Alburnoides bipunctatus, and bitterling-Rhodeus sericeus amarus, all under strict protection and one cyclostomate species of the family Petromyzonidae-river lamprey-Lampetra fluviatilis, protected at the stage of larval development.

6

Rybostan dorzecza Plocicznej na terenie Drawienskiego Parku Narodowego i jego otuliny

51%

Chelkowski Z., Chelkowska B., Antoszek O., Gancarczyk J.

Parki Narodowe

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1997

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nr 3

14-15

Ograniczanie wyników

4 Acta Ichthyologica et Piscatoria

2 Parki Narodowe

6 Antoszek O.

5 Chelkowski Z.

4 Chelkowska B.

3 Gancarczyk J.

2 1999

2 1997

2 1996

Age structure of the smolts of the migratory morphotype of the brown trout [Salmo trutta m.trutta L.,1758] from the Gowienica River

Growth rate of the smolts of the migratory morphotype of the brown trout [Salmo trutta m.trutta L.,1758] from the Gowienica River

Fauna kragloustych i ryb rzeki Drawy w obszarze Drawienskiego Parku Narodowego

Cyclostomes and fishes of the drainage basin of the river Plociczna

Cyclostomates and fishes of the Drawa River within the limits of the Drawienski National Park

Rybostan dorzecza Plocicznej na terenie Drawienskiego Parku Narodowego i jego otuliny