Hopkins Marine Station Student Paper

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(full paper is archived in the Miller Library)

Title: Distribution and gut content analysis of the Siphonophore Apolemia uvaria in the Monterey Bay Canyon
Student Author(s): SooHoo, Nelson
Faculty Advisor(s): Baxter, Chuck
Pages: 17
Location: Final Papers Biology 175H
Date: June 1990
Abstract: This paper presents a method of determining the relative abundance of the siphonophore species Apolemia uvaria in relation to depth in the Monterey Bay Canyon. This species of phynosect was found to exist intact at depths below 250 meters. Further, density increased with depth below this level. In addition, it was found to be more abundant in habitats close to the canyon wall as compared to one mile off the wall. The unique resources of the Monterey Bay Aquarium Research Institute (MBARI) and its remote operated vehicle (ROV) were used to study and collect these organisms. A gut content analysis and description of the general feeding pattern of A. uvaria was also conducted with samples collected at depths of up to 500 meters. It was shown to have a novel feeding strategy in comparison to other siphonophores studied. In particular, its numerous, large gastrozooids allow for flexibility in prey size and percentage of gastrozooids containing prey.