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University of California Press, Published 1936 (issued January 14, 1936). Wraps, 12 pp.; 26 cm; illustrated with 1 figure in text and 1 full-page photographic plate (Plate 3, showing growth stages of Mytilus californianus shells at natural size). University of California Publications in Zoology, Volume 41, No. 5, pp. 35-44. A Contribution from the George Williams Hooper Foundation for Medical Research, University of California, San Francisco.
In Good condition. Original grey printed wraps show moderate shelf wear with mild toning and scattered foxing along the edges and at the head of the front cover. Accession number "209" inked at head of front cover. Binding sound (staple bound). Interior pages with scattered light foxing at margins but otherwise clean and unmarked.A 1936 zoological study by W. Forest Whedon of the spawning habits of the California mussel (Mytilus californianus) and their relation to the sudden seasonal appearance of mussel poison toxicity. Drawing on observations along the Northern California coast from 1931 onward, Whedon correlates gonad and digestive-diverticula development with the appearance of toxic compounds in the flesh, and establishes a seasonal spawning pattern from June to September. The paper represents the first part of a series on mussel poison from the Hooper Foundation's biomedical research program.Plate 3 explanation: The various stages in the growth of the mussel, Mytilus californianus, following the formation of the shell, natural size. Collections made at: A. Half Moon Bay, October 11, 1931; B. Jenner, April 23, 1932; C. Pedro Point, April 28, 1932; D. Pescadero, June 18, 1932; E. San Francisco, September 14, 1932.