Skip to main content

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

Ă—106/ml

Number of spermatozoa

VCL

ÎĽm/s

Curvilinear velocity along actual swimming path

VSL

ÎĽm/s

Straight-line velocity along shortest path from start to end point

VAP

ÎĽm/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

ÎĽm

Amplitude of lateral head displacement

BCF

Hz

Beat cross frequency based on VCL crossing VAP per second