The viability of the first generation roach (<Emphasis Type="Italic">Rutilus rutilus</Emphasis> L.), bream (<Emphasis Type="Italic">Abramis brama</Emphasis> L.), and blue bream (<Emphasis Type="Italic">Abramis ballerus</Emphasis> L.) hybrids at early stages of development |
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| Authors: | E E Slyn’ko Yu V Slyn’ko |
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| Institution: | (1) UCD School of Biology and Environmental Science, University College Dublin, Belfield, Dublin 4, Ireland;(2) Laboratory of Experimental Ecology and Aquaculture, Department of Biology, University of Rome 'Tor Vergata', Via della Ricerca Scientifica s.n.c, 00133 Rome, Italy;(3) Central Fisheries Board, Swords Business Campus, Swords, Co. Dublin, Ireland |
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| Abstract: | The viability of bream, roach, and blue bream F
1hybrids at early stages of their development is analyzed. Viability is controlled according to parameters of the survival
rate at stages from fertilized eggs to yearlings. During embryogenesis, significant stages (blastula—gastrula and hatching)
are revealed by the amount of losses. The viability of hybrids of the first generation (compared to pure species) from the
hatching stage and in the subsequent development constantly increases. At the stage of fingerlings, the viability of F
1hybrids significantly exceeds that of pure species, which points to the heterozygous effect according to the parameters of
hybrid survival for the first generation, which is absent in embryogenesis. |
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