# SalmonSperm.csv
# Examined the relationship between sperm tail length and probability of fertilization for 
#   Atlantic Salmon adults and precocious parr.
#  step.len: Sperm tail end piece length (um)
#  fert.succ: Fertilization success
#  mat: maturity stage -- Adult or Parr
# Data visually estimted from Fig. 6 of Vladic, T.V., B.A. Afzelilus, and G.E. Bronnikov.  
#   2002.  Sperm quality as reflected through morphology in salmon alternative life 
#   histories.  Biology of Reproduction 66:98-105.