Wyniki wyszukiwania

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Cyclomorphosis affecting sensillary structures in Isotoma tshernovi Martynova, 1974 [Isotoma nanseni Fjellberg, 1978, syn.nov.] [Collembola, Isotomidae]

100%

Fjellberg A.

Polskie Pismo Entomologiczne

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1995

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tom 64

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nr 1-4

2

Morphologically intermediate form between Athous haemorrhoidalis and A. vittatus (Coleoptera: Elateridae): a case of hybridization? A preliminary study

84%

Wysocka A., Kaczmarczyk A., Buchholz L., Sell J.

Annales Zoologici

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2011

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tom 61

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nr 4

In the present preliminary study we report an investigation on taxonomic status of individuals displaying diagnostic traits of intermediate values between the morphologically typical forms of Athous haemorrhoidalis (Fabricius 1801) and A. vittatus (Gmelin 1790) species occurring sympatrically. The presence of the "intermediate form" invoked the hypothesis of interspecific hybridization between A. haemorrhoidalis and A. vittatus species. An alternative explanation is that the "intermediate form" comprises individuals that are morphological variants of either of the species, without interspecific gene flow. We used partial sequences of two mitochondrial genes coding for the cytochrome oxidase subunit I (cox1) and 16S ribosomal RNA (rrnL), respectively. Additionally, we examined the variability of five polymorphic allozyme loci: 6Pgd, Idh, Mdh, Pgm and Gpi. Altogether, 28 A. haemorrhoidalis, 7 A. vittatus and 8 "intermediate form" individuals were included into the study. Phylogenetic analyses produced the trees of a consistent topology with high statistical support regardless of the method used. The specimens signified as the "intermediate form" constituted a monophyletic group with individuals of A. vittatus species. Empirical data confirmed that the reproductive isolation between the species studied is complete. No haplotype was shared between A. haemorrhoidalis and A. vittatus in sympatry. Similar results were obtained using the analysis of allozyme data. Especially at Idh and 6Pgd loci, alleles characteristic for A. vittatus and the "intermediate form" were not found in A. haemorrhoidalis, despite the larger sample examined. This suggests that the "intermediate form" is a phenotypic variant of A. vittatus without the signature of introgression.

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The bryoflora of urban areas - a floristic-ecological case study of Oswiecim town [ S Poland ]

84%

Zarnowiec J.

Fragmenta Floristica et Geobotanica

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1996

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tom 41

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nr 1

4

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Correlation between morphological forms of three-spined stickleback and parasites infestation in the Baltic Sea

67%

Morozinska-Gogol J.

Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline

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2000

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tom 04

The three-spined stickleback Gasterosteus aculeatus (L.) has been a very frequent fish in the Baltic coastal waters. In the Baltic Sea occurred three morphological forms of the three-spined stickleback: trachurus, semiarmatus and leiurus. The distribution and frequency of all forms of the stickleback in the Baltic have been different. The examined sticklebacks were collected from the Gulf of Gdańsk (Gdynia, Puck, Hel) and the mouth of the Dead Vistula (Górki Wschodnie). The studies on the correlation between the morphological forms of the stickleback and parasites’ infestation were carried out. Some species of parasites infected first of all form trachurus or leiurus of the stickleback. Correlation was observed in some of marine parasites like Thersitina gasterostei (Pagenstecher, 1861) (Copepoda) and Gyrodactylus arcuatus (Bychowsky, 1933) (Monogenea), infected generally trachurus form. Freshwater ciliates from the family Trichodina or plerocercoids of Schistocephalus solidus (Müller, 1776) (Cestoda) were found generally on/in form leiurus.

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Synthese ecologique des Dioscorea [Dioscoreaceae] en Afrique centrale [Congo, Zaire, Rwanda, Burundi]

67%

N'Kounkou J.S.

Fragmenta Floristica et Geobotanica

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1996

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tom 41

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nr 2

6

Quaternary geology at Potter Peninsula, King George Island [South Shetland Islands, West Antarctica]

67%

Birkenmajer K.

Bulletin of the Polish Academy of Sciences. Earth Sciences

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1998

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tom 46

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nr 1

Ograniczanie wyników

2 Fragmenta Floristica et Geobotanica

1 Annales Zoologici

1 Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline

1 Bulletin of the Polish Academy of Sciences. Earth Sciences

1 Polskie Pismo Entomologiczne

1 Birkenmajer K.

1 Buchholz L.

1 Fjellberg A.

1 Kaczmarczyk A.

1 Morozinska-Gogol J.

1 N'Kounkou J.S.

1 Sell J.

1 Wysocka A.

1 Zarnowiec J.

1 2011

1 2000

1 1998