FROM ILLINOIS TO CALIFORNIA 50 Years Ago: HISTORICAL CLAM ECOLOGY
Pacific Marine Station at Dillon Beach in Tomales Bay, Mugu Lagoon and Bodega Bay
Robert Jan "Roy" van de Hoek, President of Ballona Institute, Los Angeles, California
June 17, 2014
Robert Jan "Roy" van de Hoek
Ross Pohlo completed his 87 page Ph.D dissertation in September, 1961 under the Division of Biological Sciences' Committee on Paleozoology. Due to the wonderful assistance of a librarian at the University of Chicago, I have seen a few pages of the dissertation which shows that Dr. Ralph G. Johnson was his advisor and Joel Hedgpeth is acknowledged by Ross. Ross came to California from Chicago to do his field work at 3 coastal wetland locations on clam evolution. In the future, I hope to amend this web page with new information on Ross Pohlo related to clam ecology and evolution.
THE ADAPTIVE SIGNIFICANCE OF SHELL MORPHOLOGY OF BURROWING PELECYPODS
The writer is grateful to Dr. L. Miller, University of Chicago, for his help and advice on the statistical aspects of this paper; and to Dr. J. W. Hedgpeth for making possible the ecological studies at The Pacific Marine Station, Dillon Beach, California. Funds for the field study on the California coast were provided by The National Science Foundation, grant number B-8755. The use of UNIVAC was donated by the University of Chicago.
Messrs. S. Obrebksi and P. Jolicoeur provided useful criticism at all stages of the study, and critically read the manuscript.
The author particularly wishes to thank Dr. R. G. Johnson, University of Chicago, for his help and encouragement in this research, and throughout the writer's graduate work at the University of Chicago.
MATERIAL and METHODS
The following material was gathered during the summer of 1960 at the Pacific Marine Station, Tomales Bay, California. Seven species were selected as follows: (the number of individuals used for measurements is shown in parenthesis). Venerupis (Protothaca) staminea (44 ind.); Schizothaerus nuttallii (43 ind.); Macoma secta (34 ind.); Macoma nasuta (44 ind.); Tagelus californianus (37 ind.); Solen sicarius (40 ind.); Siliqua patula (23 ind.).
Siliqua patula and Solen sicarius of the family Solenidae and Tagelus californianus of the family Asaphidae are here grouped as razor clams.
Studies of environmental surroundings and behavior of these species were carried out at the Pacific Marine Station, Tomales Bay, at Bodega Bay, and Mugu Lagoon, California. Particular attention was paid to burrowing behavior, life position and method of feeding. These features will be referred to as the animals "mode-of-life" throughout the report. Observations of these features was carried out in the field, and aquaria in the laboratory.