. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Vol. 125, No. 2 October, 1963 THE BIOLOGICAL BULLETIN PUBLISHED BY THE MARINE BIOLOGICAL LABORATORY STIMULATION OF SPAWNING IN THE MUSSELS, MYTILUS EDULIS LINNAEUS AND MYTILUS CALIFORNIANUS CONRAD, BY KRAFT MILL EFFLUENT1 WILBUR P. BREESE, RAYMOND E. MILLEMANN AND ROLAND E. DIMICK Yaquina Bay Laboratory, Department of Fish and Game Management, Oregon State University, CorvaUis, Oregon Various procedures have been employed by different investigators to stimulate spawning in the bay mussel, Mytilus edulis Linnaeus, and the Cal
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Vol. 125, No. 2 October, 1963 THE BIOLOGICAL BULLETIN PUBLISHED BY THE MARINE BIOLOGICAL LABORATORY STIMULATION OF SPAWNING IN THE MUSSELS, MYTILUS EDULIS LINNAEUS AND MYTILUS CALIFORNIANUS CONRAD, BY KRAFT MILL EFFLUENT1 WILBUR P. BREESE, RAYMOND E. MILLEMANN AND ROLAND E. DIMICK Yaquina Bay Laboratory, Department of Fish and Game Management, Oregon State University, CorvaUis, Oregon Various procedures have been employed by different investigators to stimulate spawning in the bay mussel, Mytilus edulis Linnaeus, and the California sea mussel, M. cahjornianns Conrad, in the laboratory. These methods have met with varied success in terms of ease, efficiency, and reproducibility. Field (1922) claimed that he was able to induce spawning in the bay mussel within an hour by rough handling, such as shaking the animals in a bucket. Costello ct al. (1957), however, were unable to stimulate spawning in the bay mussel by this treatment. The latter authors were able to obtain gametes, if the gonads were fully ripe, by removing the valves of an animal and placing the mantle folds in a small bowl containing about 100 cc. of sea water. Just (1939) was able to obtain gametes from the bay mussel by placing intact animals in bowls with sea water and allowing natural spawning to occur. Similarly, Berg and Kutsky (1951) obtained gametes from the bay mussel by allowing natural spawning to occur in bowls of sea water follow- ing storage of the animals in a dry state in a refrigerator at 4° C. Under these conditions spawning occurred up to one week after storage. However, it was not clear from these reports how readily spawning occurred, or how efficient was the method. Iwata (1950a, 1950b; 1951a, 1951b, 1951c. 1951d, 1951e, 1951f, 1951g; 1952) studied the stimulation of spawning in M. edulis under more precisely controlled conditions. He found that spawning occurred in intact animals within 30-60 minutes after an ele
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
