This study is the first to our knowledge that examined mussels'
physiology (ammonium concentration in the serum, weight changes
and survival) along the supply chain from a broad approach perspective
by following all steps of the supply chain: grading, depuration, transport
and re-watering after transport. Previous studies by Harding et al.
(2004a) examined post-harvest stress response in M. edulis during
rewatering, iced, or chilled conditions. However, this study took a
broader value chain approach to further include pre- and posttransport
conditions. Mussels lose weight when out of water which is
a consequence of gaping and loss of mantle cavity water (Bayne,
2009). Interviews made in Scotland to mussel farmers and dispatchers
revealed that it is common practice to pack mussels after depuration
in net bags (5 kg) but with an excess of weight (usually 5.8 kg per
bag) to compensate for circa 8% weight loss, similar to a Baker's dozen