Preparation of haemocyte suspension
A 200μL haemolymph sample was extracted from each shrimp by
a 25 gauge needle and 2.5 mL syringe containing an equal volume of
ice-cold anticoagulant solution (AS, glucose 20.5 g L
−1
, sodium citrate 8 g L
−1
, sodium chloride 4.2 g L
−1
, pH 7.5). Haemolymph from
ten animals was pooled to reduce interindividual variation, and
then the pooled haemolymph was diluted with AS to obtain a final
concentration of 1 × 10
6
cells mL
−1