Virginia Institute of Marine Science
Proceedings of the National Shellfisheries Association
Extensive use of a modification of the Havinga method of weighing oysters in water, using a Type K7 T GD Mettler balance with suspension attachments, has shown that weekly weighing of numbered individuals reveals individual differences . in rate of shell deposition which correlate with feeding, parasite infections, etc. The method is quick, sensitive, and accurate.
Andrews, Jay D., "Measurement of shell growth in oysters by weighing in water" (1961). VIMS Articles. 1257.