Subtitle:

Annales Zoologici, vol. 58, no 4 ; Genus Cobitis (Teleostei: Cobitidae)

Contributor:

Muzeum i Instytut Zoologii Polskiej Akademii Nauk

Publisher:

Fundacja Natura optima dux

Place of publishing:

Warszawa

Description:

Bibliogr. s. 904-905 ; S. 891-905 : il. ; 27 cm ; Nazwy taksonów w jęz. łac.

Type of object:

Czasopismo/Artykuł

Abstract:

A special feature of spined loaches of the genus Cobitis in Central Europe isthe frequent occurrence of diploid-polyploid complexes in which polyploid gynogeneticforms act as sperm parasites to the diploid form. This tight binding of the co-occurringforms results in a high level of phenotypic and ecological similarities. The present studysearches for morphological differences between them applying the characters traditionally used in loach taxonomy (body proportions, fin formula, scale shape, lamina circularis, suborbital spine, coloration) in 662 specimens from the Baltic (14 populations) and NorthSea (1 population) catchment areas. Ploidy level of each specimen was inferred from blood cell measurements. Discriminant function analysis for biometrical characters and description of qualitative features indicate the morphological distinctness of the two diploidspecies C. taenia and C. elongatoides. The polyploid unisexual biotypes are very similarto each other and to individuals of sympatric sexual species. The genome dosage effectcould be observed in morphological characters, however, in some of them the polyploid biotypes display a mosaic mode of variability: they can be more similar to sympatric parents or to the absent species in the complex, transitional and of a wider variabilityrange. In colouration pattern, the biotypes do not express the whole spectrum of the parental species variability. Meristic traits had no power to identify the different forms.

Relation:

Annales Zoologici

Volume:

58

Issue:

4

Start page:

891

End page:

905

Detailed Resource Type:

Artykuł naukowy oryginalny

Format:

application/pdf

Resource Identifier:

oai:rcin.org.pl:58708

Source:

MiIZ PAN, patrz sygn. czas. P.255, vol 58, no 4 ; MiIZ PAN, patrz sygn. czas. P.4314, vol 58, no 4 ; click here to follow the link

Language:

eng

Language of abstract:

eng

Rights:

Prawa zastrzeżone - dostęp ograniczony

Terms of use:

Zasób chroniony prawem autorskim. Korzystanie dozwolone wyłącznie na terminalach Muzeum i Instytutu Zoologii PAN w zakresie określonym przez przepisy o dozwolonym użytku.

Digitizing institution:

Muzeum i Instytut Zoologii Polskiej Akademii Nauk

Original in:

Biblioteka Muzeum i Instytutu Zoologii PAN

Projects co-financed by:

Program Operacyjny Innowacyjna Gospodarka, lata 2010-2014, Priorytet 2. Infrastruktura strefy B + R ; Unia Europejska. Europejski Fundusz Rozwoju Regionalnego

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