| UDC 597.556.33:575(265.53) |
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The Karyotype of Zoarces fedorovi (Zoarcidae, Pisces) Eelpout from the Taui Bay, the Sea of Okhotsk |
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| © 2008 I. N. Ryazanova, S. V. Frolov |
| A.V. Zhirmunsky Institute of Marine Biology FEB RAS, Vladivostok |
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| A new Zoarces fedorovi (Zoarcidae) eelpout karyotype is examined (Chereshnev, Nazarkin and Chegodaeva, 2007), the Taui Bay of the Sea of Okhotsk. The obtained data are as follows: 2n = 48 (4 meta-, 6 subme-, 34 subtelo-, and 4 acrocentric chromosomes), and NF = 58. Not a chromosome number variability or male/female karyotype differences are found. The nuclear-forming areas (NOR) are identified, by virtue of Ag-NOR banding technique, in long arm telomers of two subtelocentric chromosomes from different pairs. The NOR variability expresses itself in a different number of NOR-bearing chromosomes in cells and the number of NOR-staining blocks in chromosomes. The karyotypes of Z. fedorovi and the European eelpout Z. viviparous are similar by their chromosome numbers and morphology (2n = 48, NF = 56), but differ by their meta-, subtelo- and acrocentric chromosome numbers, which can be due to their studies at different metaphase stages. The differences between these species karyotypes are the most significant in their NOR numbers and areas. |
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| Keywords: eelpout, Zoarces fedorovi, the Sea of Okhotsk, karyotype. |
| Full text [In Russian] |
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