Scallops can swim quite actively in a random fashion if disturbed. This helps them avoid predators or escape unsuitable conditions. Scallops are well adapted to conditions in Atlantic Canada. They feed actively between 5 and 15 C, with optimum growth occurring around 10 C. Temperatures more than 21 C can be lethal. However, scallops can withstand winter temperatures in the Gulf of St. Lawrence, which may be below -1 C for several months.
Growth rate varies with location, and is dependent upon temperature and food supply.
Suggested Reading Dadswell, M.J., Parsons, G.J., 1991. Scallop biology and culture, World Aquaculture Workshops. Cold Water Aquaculture in Atlantic Canada. Robinson, S.C.M., 1993. The potential for aquaculture technology to enhance wild scallop production in Atlantic Canada.