<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>Chironomus melanotus Keyl, a new species of Polish fauna, is described on the basis of cytogenetic characteristics. It belongs to the cytocomplex thummi with the chromosome set 2n = 8, chromosome arm combinations AB CD EF G and species-specific karyotype markers.</p>
<p>Two types (somatic and inherited) of structural chromosome rearrangements in salivary gland chromosomes were identified in the species and somatic rearrangements (heterozygous inversions, deficiencies, deletions — Somatic index — 0.54) were observed for the first time in this species. In addition to those in the mosaic state, some genome alterations — trisomy and “B” chromosome, as well as larval malformations (10.27%) were detected for a first time. The malformations and somatic structural and genome aberrations may have been caused by different stress agents in the environment. Thus, we suggest that the high spectrum of somatic rearrangements observed in C. melanotus may indicate the existence of pollution (elevated Cd and Pb concentrations) in Lake Łuknajno (the study area) and perhaps trace metals and different chemicals produced by the Chara species.</p>
</abstract>

Chironomus melanotus Keyl, a new species of Polish fauna, is described on the basis of cytogenetic characteristics. It belongs to the cytocomplex thummi with the chromosome set 2n = 8, chromosome arm combinations AB CD EF G and species-specific karyotype markers.
Two types (somatic and inherited) of structural chromosome rearrangements in salivary gland chromosomes were identified in the species and somatic rearrangements (heterozygous inversions, deficiencies, deletions — Somatic index — 0.54) were observed for the first time in this species. In addition to those in the mosaic state, some genome alterations — trisomy and “B” chromosome, as well as larval malformations (10.27%) were detected for a first time. The malformations and somatic structural and genome aberrations may have been caused by different stress agents in the environment. Thus, we suggest that the high spectrum of somatic rearrangements observed in C. melanotus may indicate the existence of pollution (elevated Cd and Pb concentrations) in Lake Łuknajno (the study area) and perhaps trace metals and different chemicals produced by the Chara species.

Environmental agents in Lake Łuknajno (Poland) affecting the genome of Chironomus melanotus Keyl, 1961 (Diptera, Chironomidae) — a new species of Polish fauna

Department of Applied Ecology, Faculty of Environmental Sciences and Fisheries

University of Warmia and Mazury in Olsztyn

Oceanological and Hydrobiological Studies

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Chironomus melanotus Keyl, a new species of Polish fauna, is described on the basis of cytogenetic characteristics. It belongs to the cytocomplex thummi with...

Environmental agents in Lake Łuknajno (Poland) affecting the genome of Chironomus melanotus Keyl, 1961 (Diptera, Chironomidae) — a new species of Polish fauna

Pubblicato online: 14 giu 2013

Pagine: 164 - 172

DOI: https://doi.org/10.2478/s13545-013-0070-2

Parole chiave
Diptera, Chironomidae, Chironomus melanotus, chromosome rearrangements, Chara sp.

© 2013 Faculty of Oceanography and Geography, University of Gdańsk, Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Environmental agents in Lake Łuknajno (Poland) affecting the genome of Chironomus melanotus Keyl, 1961 (Diptera, Chironomidae) — a new species of Polish fauna

Pubblicato online: 14 giu 2013

Pagine: 164 - 172

DOI: https://doi.org/10.2478/s13545-013-0070-2

Parole chiaveDiptera, Chironomidae, Chironomus melanotus, chromosome rearrangements, Chara sp.

© 2013 Faculty of Oceanography and Geography, University of Gdańsk, Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Parole chiave
Diptera, Chironomidae, Chironomus melanotus, chromosome rearrangements, Chara sp.