. Commercial fisheries review. Fisheries; Fish trade. January 1961 COMMERCIAL FISHERIES REVIEW 41 Virginia FISHERIES LABORATORY RECEIVES GRANT TO STUDY CONCENTRATION OF RADIO- ACTIVE PARTICLES BY MARINE ANIMALS: In order to study the role of filter-feeding marine organisms (oysters, clams, etc.) in removing radioactive wastes from water and depositing them as bottom sediments, a $20,000 grant has-been awarded by the Atom- ic Energy Commission to the Virginia Fish- eries Laboratory. The Laboratory Director stated: "Studies of the concentration of radio- active particles by marine animals a
. Commercial fisheries review. Fisheries; Fish trade. January 1961 COMMERCIAL FISHERIES REVIEW 41 Virginia FISHERIES LABORATORY RECEIVES GRANT TO STUDY CONCENTRATION OF RADIO- ACTIVE PARTICLES BY MARINE ANIMALS: In order to study the role of filter-feeding marine organisms (oysters, clams, etc.) in removing radioactive wastes from water and depositing them as bottom sediments, a $20,000 grant has-been awarded by the Atom- ic Energy Commission to the Virginia Fish- eries Laboratory. The Laboratory Director stated: "Studies of the concentration of radio- active particles by marine animals and plants are especially needed in Virginia waters, be- cause of the proximity of significant nuclear activities to extensive sport and commercial fisheries, industrial and recreational areas. It should be specifically stated this particular problem is merely one of many pertaining to the over-all marine pollution situation and that this research project is but one of sev- eral which is being undertaken by the Labo- ratory's growing Pollution-Ecology Research ; There are several hundred different spe- cies of filter-feeding animals in Chesapeake Bay. These include oysters, clams, mussels, copepods, sea squirts, and worms. Of these, the oyster filters the largest volume of water per day per individual. A single market-size oyster will filter about 100 gallons of water through its gills during a 24-hour and! there are more than billion market-size oysters in Virginia waters at a given time. From this we can estimate that more than 165 billion gallons of marine waters are fiL-. tered by oysters each day. Oysters are able to remove from the water' some particles as large as sand grains, and others as small as bacteria. The undigested material is depos- ited in the form of compacted pellets on the bottom. One of the Laboratory's scientists will study the rates at which bio-deposition occurs at different salinities, temperatures, and a- vailable food levels
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