Heart beat rate adaptations to varying salinity of two intertidal Mediterranean bivalves: The invasive Brachidontes pharaonis and the native Mytilaster minimus

Figures & data

Table I. Post-hoc comparison SNK outcome to verify intra-specific/origin differences as a function of varying salinities (Bp-SN = Brachidontes pharaonis from S. Nicola intertidal marine conditions; Myt-SN = Mytilaster minimus from S. Nicola intertidal marine conditions; BP-Ett = B. pharaonis from Ettore pond; [* = P ≤ 0.05; ** = P ≤ 0.01; *** = P ≤ 0.001; ns = no significant difference (P > 0.05)]

Bp-SN (sea)	Air	20‰	37‰	45‰	60‰	75‰
Air	–
20‰	ns	–
37‰	ns	ns	–
45‰	*	*	*	–
60‰	*	*	*	*	–
75‰	*	*	*	*	*	–
Myt-SN (sea)
Air	–
20‰	ns	–
37‰	ns	ns	–
45‰	*	*	*	–
60‰	*	*	*	*	–
75‰	*	*	*	*	–	–
Bp-Ett (pond)
Air	–
20‰	*	–
37‰	ns	*	–
45‰	*	*	ns	–
60‰	*	*	*	*	–
75‰	*	*	*	*	*	–

Figure 1. HBR of investigated species at different levels of salinities (Bp-SN = Brachidontes pharaonis from marine site, S. Nicola; Bp-Ett = B. pharaonis from ponds; Myt-SN = Mytilaster minimus from marine site, S. Nicola). HBR values at 100 are simulated.