Table 1.

Gaping behaviour.

A
	17°C		37°C
Time (h)	% gaping individual	Ventilation movements (h-1)	% gaping individual	Ventilation movements (h-1)
1	100 (±0)	2.85 (±0)	100 (±0)	3.6 (±0.11)
2	92.5 (±9.57)	0.675 (±0.15)	100 (±0)	1.625 (±0.09)
3	0 (±0)	0 (±0)	87.5 (±5)	1.5 (±0.08)
4	0 (±0)	0 (±0)	67.5 (±20.6)	1.175 (±0.09)
5	0 (±0)	0 (±0)	35 (±12.9)	0.525 (±0.12)
6	0 (±0)	0 (±0)	0 (±0)	0 (±0)
B
	17°C		37°C
Time (h)	% gaping individual	Ventilation movements (h-1)	% gaping individual	Ventilation movements (h-1)
1	100 (±0)	2.825 (±0.09)	100 (±0)	3.55 (±0.13)
2	90 (±14.1)	0.675 (±0.15)	97.5 (±5)	1.6 (±0.22)
3	0 (±0)	0 (±0)	85 (±5.7)	1.425 (±0.05)
4	0 (±0)	0 (±0)	70 (±18.25)	1.125 (±0.05)
5	0 (±0)	0 (±0)	37.5 (±21.6)	0.575 (±0.22)
6	0 (±0)	0 (±0)	0 (±0)	0 (±0)

Gaping behaviour of P. perna from (A) low and (B) mid mussel zone at 17 and 37°C.