toxicité (1) substitution (1) hivernage (1) membrane (1) effet (1) taux (1) survie (1) Treatment (1) Polyethylene glycol (1) Week (1) Survival (1) Semen (1) Refrigeration and refrigerating machinery (1) Queens (1) Povidone (1) Polyethylene (1) Months (1) Integrity (1) Honeybee (1) Frost (1) Fertility (1) Farm produce (1) Dimethyl sulfoxide (1) Dextran (1) Cryobiology (1) Bees (1) Artificial insemination (1) Addition (1) Animal clutches (1) Toxicology (1)