In an editorial entitled "PI Blood Group, Pigeon Antigens, and Respiratory Disease" in the December 1976 issue (Chest 70:694, 1976), I suggested that individuals without the P, antigen (P, blood phenotype) may have a greater risk of respiratory disease and that this hypothesis should be tested among individuals selected for respiratory disease, rather than for handling of birds. In their reply ...

the maintenance of the endangered caspian brown trout salmo trutta caspius populations in iran depends on its artificial breeding. there is no information on how current hatchery breeding protocol influences effective population size of breeders (ne), which is a critical parameter to maintain genetic diversity in future generations. the current hatchery protocol (chp) was comparatively evaluate...