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Spermatozoa from diploid and tetraploid Pacific oysters (Crassostrea gigas) were examined after anisotonic fixation. Morphological anomalies, such as membrane rupture, detached tails, and the formation of tail vesicles (typically associated with damage attributable to procedures such as cryopreservation) were observed; the Mantel-Haenszel Chi-square test indicated a strong association between the...
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