Vet Med - Czech, 2003, 48(8):215-220 | DOI: 10.17221/5772-VETMED

Micronucleus occurrence in diploid and triploid rainbow trout (Oncorhynchus mykiss Walbaum)

I. Strunjak-Perovic, R. Coz-Rakovac, N. Topic Popovic
Division of Materials Chemistry, Rudjer Boskovic Institute, Zagreb, Croatia

The aim of the study was to observe the influence of different ploidy levels in fish on micronucleus occur­rence. Twenty minutes after fertilization, one group of rainbow trout eggs was exposed to water temperatures of 26°C in duration of 20 minutes to induce triploidy. Second group was kept in water temperature of 10°C, which is optimal for development of rainbow trout. The frequency of micronucleated erythrocytes was determined in the peripheral circulation of rainbow trout 67 days (following absorption of the yolk - swim-up stage) and 128 days (fry stage) post fertilization. There was a significant difference (P < 0.001) between frequency of micronucleated erythrocytes of diploid (1.10 ± 0.96‰) and triploid (2.41 ± 1.28‰) fish at swim-up stage. Increased mean values of micronucleus in diploid (1.80 ± 1.57‰) and triploid (5.92 ± 3.80‰) fry were also recorded.

Keywords: rainbow trout; diploid; triploid; micronucleus

Published: August 31, 2003  Show citation

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Strunjak-Perovic I, Coz-Rakovac R, Topic Popovic N. Micronucleus occurrence in diploid and triploid rainbow trout (Oncorhynchus mykiss Walbaum). Vet Med - Czech. 2003;48(8):215-220. doi: 10.17221/5772-VETMED.
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