Table 8.

Mean ± s.d. of abiotic (seawater temperature and salinity) and biotic factors (cockle height and age) and the overall percentage of the presence of epiflora on the cockle shells by season

Mean ± s.d.	Spring 2018	Summer 2018	Autumn 2018	Winter 2018/19	Spring 2019
Temperature (°C)	12.2 ± 3.9	12.0 ± 3.3	11.9 ± 3.3	11.5 ± 3.4	11.4 ± 3.4
Salinity (PSU)	32.2 ± 1.6	33.1 ± 1.4	32.9 ± 1.6	32.7 ± 1.7	32.6 ± 1.7
Height (mm)	28.0 ± 7.4	27.2 ± 7.1	27.5 ± 6.9	27.8 ± 6.7	27.9 ± 6.6
Age (growth rings)	2.7 ± 1.7	2.8 ± 1.7	2.8 ± 1.8	2.9 ± 1.8	2.9 ± 1.7
Epiflora (presence/absence)	26.7%	8.7%	2.1%	1.9%	4.9%