Rates of water processing, oxygen consumption and efficiency of particle retention in veligers and young post-metamorphicMytilus edulis

Length- and weight-dependent clearance rates of juvenile mussels (Mytilus edulis) on various planktonic prey items

“…But it seems that re-filtration was not a constant factor. In 2012, for the smallest mussels, clearance rates were comparable to rates determined in controlled laboratory experiments on small post-metamorphosed larvae (Riisgård et al 1980). With increasing mussel weight and concentration (Table 1), the difference got larger and it seems that the influence of re-filtration on the clearance rate becomes more importance (Fig.…”

“…The relationship between clearance rate (L h -1 ) and tissue dry weight (g) is best described by the equation log R C = log (-0.13 ± 0.06) ? 0.67 log W. Both axes are on log scale study and the study performed by Riisgård et al (1980). While in the current study clearance rate scaled with an exponent of two-thirds over the entire size range.…”

“…Since weight scales with volume and volume scales with length 3 , gill area will scale with weight 2/3 and filtration rate will thus also scale with weight 2/3 , so R F = weight 2/3 (Jones et al 1992). For veliger and post-metamorphosed larvae, filtration rate was reported to scale with weight 0.8-1 (Riisgård et al 1980;Beiras and Camacho 1994). The high scaling factor was attributed to a high non-isometric growth of the gills.…”

“…There have been numerous studies performed on the filtration capacity and feeding behaviour of mussels, but these studies were mainly confined to larger ([15 mm) individuals (e.g. Widdows 1978; Bayne and Widdows 1978;Møhlenberg and Riisgård 1979;Riisgård et al 1980Riisgård et al , 2014Kiørboe and Møhlenberg 1981;Jones et al 1992;Smaal et al 1997), while smaller individuals have been studied far less intensively (but see Riisgård et al 1980). Most studies on filtration rates of mussels were performed under controlled laboratory conditions using algal cultures.…”

“…Mussel larvae are suspension feeders, utilising a ciliated velum to capture food particles (Riisgård et al 1980). After settlement and during metamorphosis, the feeding modus changes from a velum to the ctenidium, which also serves as a respiratory organ (gills) (Cranford et al 2011).…”