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Effective Condition for Whole Testis Cryopreservation Of Endangered Miho Spine Loach (Cobitis Choii) Through the Optimization of Mud Loach (Misgurnus Mizolepis) Whole Testis Cryopreservation Condition

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BACKGROUND: Miho spine loach (Cobitis choii) is an endangered Korean endemic fish. Whole testis cryopreservation is a good way for species preservation, but needs to the sacrifice of a large number of fish to optimize the freezing condition. Considering this limitation, a surrogate fish species was used for the protocol development. OBJECTIVE: This study was to establish the effective condition for Miho spine loach whole testis cryopreservation by optimizing the conditions for whole testis cryopreservation in an allied species, mud loach (Misgurnus mizolepis). MATERIALS AND METHODS: The condition for whole testis cryopreservation was optimized in mud loach first, and then the optimal condition was applied to Miho spine loach testes. RESULTS: The optimal condition for mud loach testis cryopreservation consists of the freezing medium containing 1.3 M dimethyl sulfoxide, 6% fetal bovine serum and 0.3 M trehalose, –1˚/min cooling rate and 26˚ thawing temperature, which also permits effective cryopreservation of Miho spine loach testes. CONCLUSION: An effective cryopreservation condition for whole testis of the endangered Miho spine loach has been established by using mud loach as a surrogate fish.
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Keywords: CRYOPRESERVATION; ENDANGERED FISH SPECIES; MIHO SPINE LOACH; MUD LOACH; WHOLE TESTIS

Document Type: Research Article

Publication date: January 1, 2018

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  • CryoLetters is a bimonthly international journal for low temperature sciences, including cryobiology, cryopreservation or vitrification of cells and tissues, chemical and physical aspects of freezing and drying, and studies involving ecology of cold environments, and cold adaptation

    The journal publishes original research reports, authoritative reviews, technical developments and commissioned book reviews of studies of the effects produced by low temperatures on a wide variety of scientific and technical processes, or those involving low temperature techniques in the investigation of physical, chemical, biological and ecological problems.

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