alexa Vitrification of turbot embryos: preliminary assays.
Agri and Aquaculture

Agri and Aquaculture

Journal of Aquaculture Research & Development

Author(s): Robles V, Cabrita E, Real M, Alvarez R, Herrez MP

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Abstract Successful fish embryo cryopreservation is still far from being achieved. Vitrification is considered the most promising option. Many factors are involved in the success of the process. The choice of a proper vitrification solution, the enzymatic permeabilization of embryos to increase cryoprotectant permeability, the adequate container for embryo loading, and the temperature for thawing, were the parameters considered at different developmental stages in the present study. After vitrification, embryo morphology was evaluated under stereoscopic microscopy, establishing the percentage of intact embryos. Two of the studied parameters yielded differences in this percentage, the volume of straw used for embryo loading (1 ml straws were significantly better than 0.5 ml straws, with regard to post-thawed embryo morphologies), and the thawing temperature, achieving 49\% of embryos with intact morphology after thawing at 0 degrees C. After thawing, the intact embryos were incubated and periodically observed to detect morphological changes. Changes in the perivitelline space, shrinkage of the yolk and chorion ruptures as well as a progressive whitening of the embryo and yolk were observed. After 8 h all embryos showed clear signs of degradation and during this incubation period no embryo showed any developmental ability.
This article was published in Cryobiology and referenced in Journal of Aquaculture Research & Development

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