This paper presents the results of the study on pollen morphology of five Polish species of the genus Sorbus L. (S. aria (L.) Crantz, S. aucuparia L. Emend. Hedl., S. chamaemespilus (L.) Crantz, S. intermedia (Ehrh.) Pers. and S. torminalis (L.) Crantz). Observations were carried out with light and scanning microscopes. Investigated pollen grains were small or medium size, most often subprolate or prolate spheroidal in outline. Exine of medium thickness, consisted of two layers. Mainly 3-zonocolporate or sometimes 4-zonocolporate (S. chamaemespilus and S. torminalis) grains were noted. Usually striatae type of sculpture was observed, except the grains of S. intermedia, which were characterized by intermediate type of sculpture, with the features both striate and regulate ornamentation.Pollen morphology of the investigated Sorbus species corresponds with their systematic classification. It is relatively easy to separate pollen grains of the following subgenera: Sorbus, Chamaemespilus and Torminaria. Only subgenus Aria includes grains of different morphology and therefore it is impossible to determine the diagnostic features of this subgenus. Pollen morphology does not confirm a close relationship between S. aria and S. intermedia.It is possible to distinguished pollen grains of all the analysed native species. However, there are no important differences in pollen morphology between the subspecies of Sorbus aucuparia. The key for Polish Sorbus species, based on pollen grain characters is given too.

This paper contains results of studies on pollen morphology of 5 Polish species of the family Caprifoliaceae (genera Sambucus and Viburnum). The pollen has been examined with LM and SEM. Besides detailed descriptions, series of microphotographs are presented. All examined species have small to medium-sized grains, with prolate polar axis, reticulate ornamentation (at least in mesocolpia), relatively long ectoapertures and with often visible equatorial bridges. Extent of fusion of capita in muri allows to divide observed pollen grains into 2 subtypes: one for examined Sambucus species and for V. opulus, the second for V. lantana

This paper presents further results of studies on pollen morphology of the family Caprifoliaceae. Besides detailed descriptions of 6 species of genera Linnaea and Lonicera, series of LM and SEM microphotographs are included. All examined species have pollen grains of medium- or large-sized, with oblate forms, echinate (microechinate) ornamentation and short ectoaperture, often margined by costa. Length of spines and density of their distribution on the tectum allow to distinguish Linnaea and Lonicera subtypes. The key for determination of 11 Caprifoliaceae species, based on pollen morphology is proposed too

In July 2005, 107 rainbow trout in age 1+ from a salmonid farm in Southern Germany situated in the southern tributary area of the Danube river were examined. The aim of this study was to determine the gyrodactylid species found on rainbow trout and to identify their location on the host's body. In total, 291 specimens from genus Gyrodactylus were collected. The most abundantly occurring species was Gyrodactylus truttae (181 specimens), whilst the others were less abundant. For the first time in Germany, Gyrodactylus teuchis and Gyrodactylus derjavinoides on rainbow trout were found. Most parasites occurred on the pectoral and ventral fins. Few specimens were found on the anal or caudal fins, in the oral cavity or on the gills. The only uninfected place was the nasal cavity.

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