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Semen from rainbow trout produced using cryopreserved spermatozoa is more suitable for cryopreservation

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Oocytes from three female rainbow trout Oncorhynchus mykiss were inseminated separately with untreated or cryopreserved semen, which had been produced using either untreated (three males) or cryopreserved (three males) spermatozoa. In half of variants, the cryopreservation did not significantly affect fertilization efficiency. Regardless of whether the sperm donors were produced from cryopreserved or intact semen, insemination of oocytes with their intact sperm resulted in the same percentage of eyed embryos (94.4 and 94.3%, respectively). When eggs were inseminated with cryopreserved semen, the use of sperm from males produced with cryopreserved spermatozoa resulted in a significantly higher percentage of eyed eggs than in case of donors produced with intact sperm (89.6 and 81.7%, respectively). The production of rainbow trout using cryopreserved sperm does not appear to negatively affect reproductive abilities of male progeny and semen from donors, which were produced using cryopreserved sperm, is more suitable for cryopreservation than the semen from donors produced with intactspermatozoa.

Document Type: Research Article


Affiliations: 1: Department of Animal Biochemistry, Warmia and Mazury University in Olsztyn, 10-957 Olsztyn, Poland 2: Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, 10-718 Olsztyn, Poland 3: Department of Salmonid Research, Inland Fisheries Institute, Rutki, 83-330 Zukowo, Poland

Publication date: March 1, 2002


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