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Suspension-feeding and assimilation efficiency in Lanice conchilega
Buhr, K.-J. (1976). Suspension-feeding and assimilation efficiency in Lanice conchilega. Mar. Biol. (Berl.) 38(4): 373-383
In: Marine Biology. Springer: Heidelberg; Berlin. ISSN 0025-3162, more
Peer reviewed article  

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Keywords
    Colorimetric techniques; Dry weight; Filter feeders; Food consumption; Food conversion; Suspended organic matter; Lanice conchilega (Pallas, 1766) [WoRMS]; Marine

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  • Buhr, K.-J.

Abstract
    In lab experiments, measurements of ingested ration, assimilated ration and assimilation efficiency in the polychaete L. conchilega were carried out at 12{degree}C and at a food concn of 40 x 10 Super(6) cells of Dunaliella marina. Over periods of 20 to 46 days, the ingested ration was determined photometrically by the continuous automatic recording apparatus described by Winter (1973). The assimilated ration was calculated from the calorific content of the food ingested minus the calorific content of the faeces produced. Within the range of body size investigated (1.3 to 35.0 mg dry-tissue wt), the food intake (= filtration rate = F) was found to be a linear function of body size (W) according to the equation F = 0.88W Super(0.32). the daily food intake-expressed as percentage of dry-tissue wt-decreased from 35.7 to 3.9% with increasing body size. The assimilation efficiency was found to vary between 70.6 and 77.2% and showed no significant correlation with body size. The absolute amounts of food retained from suspension and the assimilation efficiencies calculated for L. conchilega are within the range typical for obligatory suspension-feeding organisms. This implies that L. conchilega is capable of completely replacing deposit-feeding by suspension-feeding.

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