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Table 3 The different sperm kinematic parameters recorded with computer aided semen analysis (CASA)

From: Sperm structure and motility in the eusocial naked mole-rat, Heterocephalus glaber: a case of degenerative orthogenesis in the absence of sperm competition?

Parameter Unit Description
Motility % Total motility
Concentration ×106/ml Number of spermatozoa
VCL μm/s Curvilinear velocity along actual swimming path
VSL μm/s Straight-line velocity along shortest path from start to end point
VAP μm/s Average path velocity based on every 5th frame of VCL path
LIN % Linearity of a curvilinear path, expressed as VSL/VCL
STR % Straightness, expressed as VSL/VAP
WOB % Wobble, expressed as VAP/VCL
ALH μm Amplitude of lateral head displacement
BCF Hz Beat cross frequency based on VCL crossing VAP per second