{"refrec":{"BRefID":29856,"RR":"<b>Gorshkov, S.; Gorshkova, G.; Hadani, A.; Gordin, H.; Knibb, W.</b> (2002). Chromosome set manipulations and hybridization experiments in gilthead seabream (<i>Sparus aurata</i>): 2. Assessment of diploid and triploid hybrids between gilthead seabream and red seabream (<i>Pagrus major</i>). <i>J. Appl. Ichthyol. 18(2)</i>: 106-112","BEntID":29856,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>J. Appl. Ichthyol. 18(2)</i>: 106-112","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Gorshkov, S.; Gorshkova, G.; Hadani, A.; Gordin, H.; Knibb, W.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Gorshkov, S. <i>et al.</i>","Englishabstract":"The experiments were designed to evaluate the suitability for mariculture of the diploid and triploid hybrids of gilthead seabream <i>Sparus aurata</i> and red seabream <i>Pagrus major</i>, both of which are members of the Sparidae family. Performance testing of the hybrids was carried out in comparison with the parental species under the same controlled environment. The reciprocal diploid hybrids as well as the triploid hybrid did not exhibit any significant growth advantage over diploid parental species either before or after sexual maturity. The adults, both reciprocal diploid hybrids and triploid hybrid (female <i>S. aurata</i> x  male <i>P. major</i>), were clearly immature and had only vestigial gonads; neither ovaries nor released milts were observed. Histological examination of the gonads, carried out during associated periods of the first and second maturation cycles of the parental species, showed that all the hybrids were completely sterile. Despite their sterility, the growth of the hybrids did not display any positive effect, and for this reason their commercial culture appears to be questionable. On the other hand, the use of sterilization through hybridization and chromosome set manipulation may be important when there is a need to restrict the ecological impact on a wild population.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Chromosome set manipulations and hybridization experiments in gilthead seabream (<i>Sparus aurata</i>): 2. 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