Table 3. Concentration values (mean ± SD, minimum and maximum, in dry weight) in the mucus pellet and supernatant of Fe_tot (measured by ICP-OES) and Fe²⁺ (measured by the colorimetric ferrozine assay).

	Fetot (×10−3 mg/g d.w.)		Fe2+ (×10−3 mg/g d.w.)
	Mean ± SD	Min.–Max.	Mean ± SD	Min.–Max.
Pellet	2.40 ± 2.48	0.271–6.82	0.195 ± 0.171	0.0489–0.490
Supernatant	0.395 ± 0.377	0.0754–1.02	0.0439 ± 0.0559	0.00134–0.138