Translator Disclaimer
1 April 2012 Quantifying the Effects of Diet and Mussel Size on the Biophysical Properties of the Blue Mussel, Mytilus spp., Feces Egested Under Simulated Imta Conditions
Author Affiliations +
Abstract

Three size classes of mussels (Mytilus spp.) (small, 26–35 mm; medium, 45–54 mm; and large, 65–74 mm) were exposed to 4 experimental diets consisting of mixed algae, diatom pastes, salmon feed “fines,” or salmon feces. Salmon culture byproduct particles (feces and feed fines) were found to have minimal effect on the biophysical properties of mussel feces when compared with those from an algal-based diet. Differences in fecal morphology (feces widths) of mussel feces were found to be minimal in small mussel sizes, but became more significant as mussel shell length increased (45–74 mm). Furthermore, faeces from fish farm-based diets were found to be significantly narrower than algal based diets. Absorption efficiencies of the 4 different diets were 87%, 81%, 90%, and 86%, respectively. Regardless of diet, small mussels produced feces that dispersed as a function of settling velocity (small, 0.18 cm/sec; medium, 0.29 cm/sec; and large, 0.54 cm/sec (settling velocity of 50% of particles)) over much larger areas than those feces produced by larger mussels, suggesting that the influence of mussel culture on benthic loading of organic material around an aquaculture site will tend to increase over time as the mussel crop grows to maturity.

Matthew Liutkus, Shawn Robinson, Bruce MacDonald, and Gregor Reid "Quantifying the Effects of Diet and Mussel Size on the Biophysical Properties of the Blue Mussel, Mytilus spp., Feces Egested Under Simulated Imta Conditions," Journal of Shellfish Research 31(1), 69-77, (1 April 2012). https://doi.org/10.2983/035.031.0109
Published: 1 April 2012
JOURNAL ARTICLE
9 PAGES


SHARE
ARTICLE IMPACT
Back to Top