Mating system pH pH Calcium concentration (µm/µL) Calcium concentration (µm/µL)
Species Uterus Oviduct Uterus Oviduct
Polyandrous P. maniculatus 8.00 ± 0.00 7.44 ± 0.03 5.73 ± 0.97 2.84 ± 0.42
Monogamous P. polionotus 7.76 ± 0.06 7.28 ± 0.03 4.11 ± 0.40 3.22 ± 0.53