Feeding Behaviour of the Mussel, Mytilus edulis: New Observations, with a Minireview of Current Knowledge

Table 3

Mytilus edulis. Pseudofaeces production by mussels exposed to different initial algal (Rhodomonas salina) concentrations. Opening degree symbols: 3: fully open, 2: reduced, 1: nearly closed. No observation = no. Filtration rate (F) using (2). *New addition of algae.

Series no.	Shell length (mm)	Time (min)	C (cells mL^−1)	Pseudofaeces (no. per 10 min)	Opening degree	F (mL min^−1)
1	34.3	0	23,500	22	no	25.5
		52	13,700	46	3
		112	9,100	22	2
2	34.3	0	16,700	26	2	23.4
		50	10,200	18	1
		118	8,900	no	no
		120*	10,000	34	no	31.5
		170	5,800	19	2
		235	4,000	9	2
3	34.3	0	10,000	0	1	15.3
		68	4,900	0	3
		127	2,600	0	3
4	36.8	0	19,200	17	1	66.3
		30	9,100	4	3
		90	2,600	0	3
5	36.8	0	12,900	8	2	51.6
		8	12,700	26	3
		42	6,000	1	3
		90	2,700	0	3
6	36.8	0	14,600	6	2	50.4
		40	9,400	4	3
		85	3,500	0	3
		225*	12,100	0	3	60.3
		300	5,100	0	3
		342	1,000	0	3
7	63.7	0	21,500	42	2	67.8
		43	8,500	42	2
		93	2,600	26	2
		180*	10,600	41	1	56.7
		227	2,400	14	3
		285	1,400	5	2