Abstract：
:The objectives of this study were to identify the presence of different spermatozoa subpopulations (SPs) according to their kinematic characteristics in the sperm of common carp and to test the effects of cryopreservation and prolonged (6-day) storage at room temperature (RT; 23 °C) and 4 °C on spermatozoa motility and subsequently on SP dynamics. Two-step clustering analyses identified three motile SPs based on their kinematic properties: SP1 contained spermatozoa with low velocity and low/moderate STR/LIN values (slow non-linear SP); SP2 was comprised of spermatozoa with high velocities and high STR/LIN values (fast linear SP); SP3 was characterized with high VCL, and moderate LIN/STR (fast non-linear SP); and an additional SP0 was added comprising immotile spermatozoa. Total motility, progressive motility and VCL decreased after cryopreservation to approximately 50% of their value in fresh sperm, while the frequency of SPs characterized by high values of motility parameters declined in favor of those with low motility values and SP0. Motility values of fresh and cryopreserved spermatozoa which were washed with fresh extender after thawing decreased significantly after 24 h of storage at RT and after 72 h of storage at 4 °C, while cryopreserved sperm which remained in the original cryomedium faced a steep decline in motility after only 2 h of storage. As subpopulation frequencies followed this dynamic, this indicates that cryopreserved sperm should be washed with fresh extender in order to obtain favorable sperm kinematic properties after freezing.
journal_name
Cryobiologyjournal_title
Cryobiologyauthors
Marinović Z,Šćekić I,Lujić J,Urbányi B,Horváth Ádoi
10.1016/j.cryobiol.2021.01.007subject
Has Abstractpub_date
2021-01-12 00:00:00eissn
0011-2240issn
1090-2392pii
S0011-2240(21)00007-9pub_type
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