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

Author

Listed:
  • I. Strunjak-Perovic

    (Division of Materials Chemistry, Rudjer Boskovic Institute, Zagreb, Croatia)

  • R. Coz-Rakovac

    (Division of Materials Chemistry, Rudjer Boskovic Institute, Zagreb, Croatia)

  • N. Topic Popovic

    (Division of Materials Chemistry, Rudjer Boskovic Institute, Zagreb, Croatia)

Abstract

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.

Suggested Citation

  • I. Strunjak-Perovic & R. Coz-Rakovac & N. Topic Popovic, 2003. "Micronucleus occurrence in diploid and triploid rainbow trout (Oncorhynchus mykiss Walbaum)," Veterinární medicína, Czech Academy of Agricultural Sciences, vol. 48(8), pages 215-220.
    • Handle: RePEc:caa:jnlvet:v:48:y:2003:i:8:id:5772-vetmed
    DOI: 10.17221/5772-VETMED
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