Hopkins Marine Station Student Paper

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(full paper is archived in the Miller Library)

Title: Predators of the high intertidal harpacticoid copepod Tigriopus californicus
Student Author(s): Kopley, Kathleen Gloria
Faculty Advisor(s): Abbott, D
Pages: 21
Location: Final Papers Biology 175H
Date: June 1977
Keywords: high tide pools
Abstract: Under laboratory conditions the major predators of Tigiopus californicus, in decreasing importance, are Clinocottus analis, Pachygrapsus crassipes, Anthopleura elegantissima, Pagurus samuelis, Heptacarpus paludicola, and Trichocorixia. However, in natural situations Pachygrapsus and Pagurus are probably the primary predators in the higher pools. Trichcorixia is not as common and if it is a predator, it is not as effective as the two crabs. Anthopleura is an effective predator in the lower high tide pools which receive some fresh sea water at high tides. Even lower in the intertidal are the cottid fish; these and wave action could efficiently keep the Tigriopus population to a minimum down here. Tigriopus were not normally found in the same tide pools as the shrimps. However, heavy wave action could wash Tigriopus down to the lower pools where the shrimp are found, allowing the shrimp to act as occasional predators.