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Epigeic beetles (Coleoptera) of the Lake Swidwie nature reserve

100%

Baran L., Radawiec B., Zawal A., Nowak A., Smietana P.

Acta Biologica

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2017

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tom 24

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Parasitism of Odonata by Arrenurus (Acari: Hydrachnidia) larvae in the Lake Swidwie, nature reserve (NW Poland)

67%

Zawal A., Buczynski P.

Acta Parasitologica

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2013

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tom 58

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nr 4

Larvae of a vast majority of water mite species are parasites of aquatic insects. Owing to this, they migrate to new localities, and are able to survive unfavourable environmental conditions. This also concerns species from subgenus Arrenurus s. str., parasites of dragonflies. The detailed analysis of this phenomenon, however, has only been possible in the last several years, since the key to the identification of larvae from genus Arrenurus Dug. was published. In 2010, the parasitism of Arrenurus s. str. larvae on dragonflies in the Lake Świdwie reserve (NW Poland) was analysed. Larvae of 9 species of water mites were recorded on 107 imagines of dragonflies from 8 species. The following were identified as hosts of water mites for the first time: Anax imperator, Libellula quadrimaculata, and Leucorrhinia caudalis. The highest prevalence occurred in the case of: Erythromma najas and Lestes dryas (100%), Coenagrion pulchellum (96.5%), and C. puella (80.0%). Coenagrion pulchellum was infested by 9 species of parasites, C. puella by 6, and Erythromma najas and Lestes dryas by three species. The highest number of host species occurred in the case of Arrenurus maculator (5); followed by A. cuspidator, A. batillifer cf., A. bicuspidator, and A. tetracyphus (3 each); A. papillator, A. tricuspidator, and A. bruzelii (2 each), and A. claviger (1). Differentiation of preferences of particular parasites towards various parts of the host body was observed, probably related to the coevolution of parasites and hosts, and competition between the host species. The body sizes of the parasites suggest that approximately 50% of body size growth of water mites from subgenus Arrenurus s. str. occurs at the stage of parasitic larva.

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Cadmium and lead in fishes and in selected elements of the Swidwie Lake ecosystem

67%

Perkowska A., Protasowicki M.

Acta Ichthyologica et Piscatoria

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2000

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tom 30

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nr 2

This paper provides information on the vertical distribution of cadmium and lead in the sediments, the amounts of the elements in the surface- and rain water, in selected fish organs, contents of their alimentary tracts, and in some plant species of the Świdwie Lake ecosystem. The levels and distribution of the analysed metals in the lake sediments gave evidence of their anthropogenic origin. The distribution of cadmium and lead in the organs and alimentary tracts of fishes, and especially the low level of the elements in fishes and plants suggests that the metals are linked to the abiotic components of the lake environment and they are not easily accessible for the organisms. The best bio-indicators of the pollution-level with cadmium and lead in the lake ecosystem are: the rudd, Scardinius erythrophtalmus L. and the roots of cattail, Typha angustifolia.

Ograniczanie wyników

1 Acta Biologica

1 Acta Ichthyologica et Piscatoria

1 Acta Parasitologica

2 Zawal A.

1 Baran L.

1 Buczynski P.

1 Nowak A.

1 Perkowska A.

1 Protasowicki M.

1 Radawiec B.

1 Smietana P.

1 2017

1 2013

1 2000

Epigeic beetles (Coleoptera) of the Lake Swidwie nature reserve

Parasitism of Odonata by Arrenurus (Acari: Hydrachnidia) larvae in the Lake Swidwie, nature reserve (NW Poland)

Cadmium and lead in fishes and in selected elements of the Swidwie Lake ecosystem