The effect of pressure and temperature pretreatment on the biogas output from algal biomass.

This paper presents data on methane fermentation of algal biomass containing Chlorella sp. and Scenedesmus sp. The biomass was obtained from closed-culture photobioreactors.

Two new Antarctic Gyrodactylus species (Monogenoidea): description and phylogenetic characterization.

Two new species of Gyrodactylus Nordmann, 1832 (Gyrodactylidae, Monogenoidea) are described, i.e., Gyrodactylus coriicepsi n.

Leeches (Hirudinida: Piscicolidae)--parasites of Antarctic fish from Channichthyidae family.

There has hitherto been very few research projects focusing on ectoparasites of Antarctic fishes. The presently reported study provides data on the prevalence and the intensity of leeches (Hirudinida: Piscicolidae) infecting fishes. The materials were collected in December-February 1986/87 off the Elephant Island, South Georgia, Joinville Island, and South Shetlands.

[Professor Wincenty Wiśniewski's complex experiments about circulation of parasites in the ecosystem of Lake Druzno as a model for activities of the Ichtyoparasitological Section of the Student Scientific Association at the University of Gdańsk].

Druzno Lake is hypertrophic basin located on Zuławy polders (delta of Vistula). Due to the high number of free-living and parasitic species, this lake is unique place for parasitological research. Professor Wisniewski valued Druzno Lake as great area for studying the parasitic species life-cycles.