Table 1.

Summary of the seawater physiochemical conditions during experiments with Hyas araneus

Parameter	Control	Treatment (I)	Treatment (II)	Treatment (III)	Treatment (IV)	Treatment (V)
Temperature (°C)	5.3 ± 0.2	4.2 ± 0.2	4.5 ± 0.2	9.9 ± 0.2	9.7 ± 0.3	9.8 ± 0.2
Salinity (‰)	32.1 ± 0.7	32.2 ± 0.7	32.2 ± 0.6	33.6 ± 0.4	33.5 ± 0.4	33.6 ± 0.3
pH (NBS scale)	8.15 ± 0.03	7.81 ± 0.04	7.55 ± 0.06	8.22 ± 0.04	7.85 ± 0.04	7.54 ± 0.05
DIC (mmol kg−1)	2,366 ± 42	2,436 ± 14	2,520 ± 39	2,295 ± 28	2,395 ± 14	2,488 ± 22
PCO2 (μatm)	441 ± 35	991 ± 96	1,878 ± 246	366 ± 30	942 ± 59	2,015 ± 147
Total alkalinity (mmol kg−1)	2,479 ± 13	2,479 ± 14	2,491 ± 14	2,484 ± 10	2,469 ± 13	2,473 ± 15

Temperature, Salinity, pH and dissolved inorganic carbon (DIC) were measured and partial pressure of CO₂ (PCO₂) and total alkalinity were calculated using CO2SYS [41]. Data are mean ± SD with N = 24 (5°C), N = 16–20 (10°C).