Hopkins Marine Station Student Paper

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(full paper is archived in the Miller Library)

Title: Oxygen as a limiting factor in phototaxis and in interclonal spacing of A. elegantissima
Student Author(s): Fredericks, Craig
Faculty Advisor(s): Burnett, Robin
Pages: 18
Location: Final Papers Biology 175H
Date: June 1975
Keywords: sea anemones
Abstract: Anthopleura elegantissima was tested for phototaxis and possible photosynthetic products responsible for such behavior. Anemones, symbiotic with zooxanthellae, show phototactic responses. Phototaxis can be disrupted by exposing anemones to oxygen contents higher than ambient. Directional movement is induced by exposing opposite sides of an anemone to different oxygen concentrations; the anemone moves towards the side of higher oxygen content. Aposymbiotic clones of A. elegantissima show significantly more spacing between individuals than symbiotic clones. Symbiotic clones under oxygen stress show spacing similar to aposymbiotic clones. There is a direct relationship between distribution of clonal individuals and oxygen availability, either from the environment or from endosymbionts.
Notes: Publ 1976, Marine Biology 38: 25-28