Hopkins Marine Station Student Paper

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(full paper is archived in the Miller Library)

Title: Comparative studies of colonial morphology and the effects of selected environmental stresses on spatially separated Dodecaceria fewkesi
Student Author(s): Kauhanen, Gordon Graham
Faculty Advisor(s): Watanabe, Jim
Pages: 22
Location: Final Papers Biology 175H
Date: June 1976
Keywords: polychaeta
Abstract: 1. The Dodecaceria collected at five various habitats varied in appearance yet none of these variations indicated certain genetic isolation over environmental effects. 2. Habitat may play the significant role in colonial morphology, with surge possibly being a key factor. 3. No individual morphological evidence was found to support a single or multiple species as within colony variation is adequate to form a continuum of values if all populaitons are treated as one. 4. Tube extending is identical between Intertidal and Deep Reef populations in the lab. 5. All populations tested were well adapted to handle any naturally occuring osmitc stress. 6. Dodecaceria can live for more than eight days in reduced O2 tension of 0.3 ml/liter. 7. Temperature must be extreme to be lethal as even at 31 C a time interval of over six hours was needed to cause death to the worms.