(full paper is archived in the Miller Library)
Title: Laboratory observations on the nocturnal vertical migration behavior of Tegula pulligo (Gastropoda, Trochidae)
Student Author(s): Wright, Charles J.
Faculty Advisor(s): Baxter, Charles
Location: Final Papers Biology 175H
Date: June 1978
Keywords: biological rhythms in marine and maritime organisms
Abstract: Preliminary subtidal observations in the kelp forest adjacent to the Hopkins Marine Station at Mussel Point in mid-April yielded data suggesting that Tegula pulligo underwent a diel vertical migration on the kelp. Laboratory studies were undertaken in an attempt to demonstrate the observed field behavior, and to determine what effect light, or its intensities, may have on observed behavior. The conclusions were as follows: (1) T. pulligo undergoes a nocturnal migration in the laboratory similar to that seen in field studies. (2) T. pulligo requires at least three days to acclimatize to a laboratory environment in which light intensities are higher than those experienced in the field. (3) Animals knocked of plants undergo their greatest repopulation movement at night.