A comparison of filtration rates among pelagic tunicates using kinematic measurements
MetadataShow full item record
KeywordSalp; Pelagic tunicate; Filtration; Volume flow rate; Locomotion; Kinematics; In situ; Morphology
Salps have higher filtration rates than most other holoplankton, and are capable of packaging and exporting primary production from surface waters. A method of kinematic analysis was employed to accurately measure salp feeding rates. The data were then used to explain how diverse body morphologies and swimming motions among species and lifecycle stages influence salp feeding performance. We selected five species, representing a range of morphologies and swimming styles, and used digitized outlines from video frames to measure body-shape change during a pulse cycle. Time-varying body volume was then calculated from the digitized salp outlines to estimate the amount of fluid passing through the filtering mesh. This non-invasive method produced higher feeding rates than other methods and revealed that body volume, pulse frequency and degree of contraction are important factors for determining volume filtered. Each species possessed a unique combination of these three characteristics that resulted in comparable filtration (range: 0.44 - 15.33 ml s-1) and normalized filtration rates (range: 0.21 – 1.27 s-1) across species. The convergence of different species with diverse morphologies on similar normalized filtration suggests a tendency towards a flow optimum.
Author Posting. © The Author(s), 2009. This is the author's version of the work. It is posted here by permission of Springer for personal use, not for redistribution. The definitive version was published in Marine Biology 157 (2010): 755-764, doi:10.1007/s00227-009-1359-y.
Suggested CitationPreprint: Sutherland, Kelly R., Madin, Laurence P., "A comparison of filtration rates among pelagic tunicates using kinematic measurements", 2009-11, https://doi.org/10.1007/s00227-009-1359-y, https://hdl.handle.net/1912/3235
Showing items related by title, author, creator and subject.
Sutherland, Kelly R.; Madin, Laurence P.; Stocker, Roman (2010-07)Salps are common in oceanic waters and have higher per individual filtration rates than any other zooplankton filter feeder. Though salps are centimeters in length, feeding via particle capture occurs on a fine, mucous ...
Sutherland, Kelly R. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2010-02)Trade-offs between filtration rate and swimming performance among several salp species with distinct morphologies and swimming styles were compared. Small-scale particle encounter at the salp filtering apparatus was also ...
Effects of an allelochemical in Phaeodactylum tricornutum filtrate on Heterosigma akashiwo : morphological, physiological and growth effects Wang, Rui; Xue, Qiaona; Wang, Jiangtao; Tan, Liju; Zhang, Qingchun; Zhao, Yue; Anderson, Donald M. (2017-08)The effects of an allelochemical extracted from the culture filtrate of diatom Phaeodactylum tricornutum on the raphidophyte Heterosigma akashiwo were investigated using a series of morphological, physiological and ...