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Tempo wzrostu pstraga potokowego, Salmo trutta m. fario L. w Kaczawie

100%

Blachuta J. , Kusznierz J.

Acta Universitatis Wratislaviensis. Prace Zoologiczne

1992

tom 23

125-136

How do environmental parameters relate to macroinvertebrate metrics ? - prospects for river water quality assessment

80%

Blachuta J. , Szoszkiewicz K. , Gebler D. , Schneider S. C.

Polish Journal of Ecology

2014

tom 62

nr 1

The aim of the study was to demonstrate the relationship between macroinvertebrate assemblages and aquatic vegetation interacting with chemical and geomorphological factors. The survey was carried out in the catchment of a lowland river in Poland in the year 2009. Macroinvertebrate samples were collected on 19 river sites during two campaigns (spring and autumn) and 13 macroinvertebrate metrics were calculated. Indices were selected to reflect pressures associated with organic pollutants, morphological and general degradation of rivers. Hydromorphological assessment was undertaken according to the River Habitat Survey (RHS). Water samples for chemical analysis were collected monthly during the whole year, and nine chemical parameters were analysed. Macrophyte surveys made it possible to calculate seven parameters. It was found that macroinvertebrates collected in spring and autumn showed very different patterns and that only the spring samples showed a significant relationship between macroinvertbrates and water quality, which means that spring sampling is most important for biomonitoring. Only three macroinvertebrate metrics, i.e. SIGI (German Saprobic Index), EPT (indicating the relative abundance of Ephemeroptera, Plecoptera and Trichoptera) and MBI (index used for river ecological status assessment), responded significantly to water pollution. Macrophytes and macroinvertebrates responded differently to environmental gradients and these organism groups deliver different information for monitoring.

Koza złotawa, Sabanejewia aurata (de Filippi, 1865) w rzece Widawie - drugie stanowisko w dorzeczu Odry

80%

Witkowski A. , Blachuta J. , Kusznierz J.

tom 34

nr 2-3

Changes of gonadosomatic index (GSI) and egg diameter in the grayling Thymallus thymallus (L.) in annual cycle

80%

Witkowski A. , Blachuta J. , Kokurewicz B. , Kowalewski

nr 2

Wystepowanie cierniczka Pungitius pungitius [L.] na Slasku

80%

Kotusz J. , Kusznierz J. , Blachuta J.

tom 41

nr 3-4

247-250

Age and growth-rate of grayling Thymallus thymallus (L.) in the rivers of Pomerania (NW Poland)

80%

Witkowski A. , Blachuta J. , Olesinska J.

nr 2

A natural hybrid of Leuciscus leuciscus (L.) and Alburnus alburnus (L.) (Osteichthyes: Cyprinidae) from the Bystrzyca River (Poland)

61%

Witkowski A. , Kotusz J. , Wawer K. , Stefaniak J. , Popiolek M. , Blachuta J.

nr 2

A hybrid Leuciscus leuciscus x Alburnus alburnus was found during the ichthyofaunistic studies in the Bystrzyca River, a left-bank tributary of the Odra River (SW Poland). The hybrid was identified on the basis of its intermediate features and characteristics of the parent species (biometrical, osteological and anatomical) such as opercular and dental bones, pharyngeal bones and teeth, shape of scales, number, form and structure of radial canals of the scales, and air bladder and a complex of meristic and morphometric characters. With respect to its characteristics, the hybrid is closer to dace than to bleak. The small abundance of the hybrid shows that the hybridisation was rather accidental.

Patterns of river lamprey size and sex ratio in the Baltic Sea basin

41%

Bartel R. , Bradauskas B. , Ikonen E. , Mitans A. , Borowski W. , Garbacik-Wesołowska A. , Witkowski A. , Blachuta J. , Morzuch J. , Bernas R. , Kapusta A.

2010

tom 18

nr 4