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Table 3 Percentage of motile sperm and sperm swimming ability, and sperm morphology of male black-legged kittiwakes

From: Sperm collection in Black-legged Kittiwakes and characterization of sperm velocity and morphology

  % Motile VCL (µm/s) VAP (µm/s) VSL (µm/s) LIN (%) WOB (%) PROG (µm) BCF (Hz) Head (µm) Midpiece (µm) Flagellum (µm) Total (µm) Abnormal (%)
Mean 0.31 133.38 121.91 103.86 84.3 90.3 878.98 8.44 10.88 4.23 55.36 70.57 73.18
SD 0.15 49.99 50.51 45.37 0.1 0.1 362.81 2.23 1.11 0.77 4.67 5.07 16.75
N 18 18 18 18 18 18 18 18 20 20 20 20 19
CVam 10.7 18.9 8.5 7.4
% Within-ejaculate variance 91.5 55.3 92.5 92.0
CVwe 20.9 19.5 17.2 14.2
  1. Mean, standard deviation (SD) and sample size (N) of sperm swimming traits measured in DMEM, sperm morphological traits measured from smears preserved in formalin, and percentage of abnormal spermatozoa per ejaculate. The variability in sperm morphology across males is estimated as the coefficient of variation CVam. Within-ejaculate variability in sperm morphology is estimated as the percentage of within-ejaculate variance [σ 2within-ejaculate /(σ 2among-male  + σ 2within-ejaculate )] and within-ejaculate coefficients of variation (CVwe) (see text for details)