title: "Going with the flow" or not: evidence of positive rheotaxis in oceanic juvenile loggerhead turtles (Caretta caretta) in the South Pacific Ocean Using Satellite Tags and Ocean Circulation Data.
abstract: The movement of juvenile loggerhead turtles (n = 42) out-fitted with satellite tags and released in oceanic waters off New Caledonia was examined and compared with ocean circulation data. Merging of the daily turtle movement data with drifter buoy movements, OSCAR (Ocean Surface Current Analyses--Real time) circulation data, and three different vertical strata (0-5 m, 0-40 m, 0-100 m) of HYCOM (HYbrid Coordinate Ocean Model) circulation data indicated the turtles were swimming against the prevailing current in a statistically significant pattern. This was not an artifact of prevailing directions of current and swimming, nor was it an artifact of frictional slippage. Generalized additive modeling was used to decompose the pattern of swimming into spatial and temporal components. The findings are indicative of a positive rheotaxis whereby an organism is able to detect the current flow and orient itself to swim into the current flow direction or otherwise slow down its movement. Potential mechanisms for the means and adaptive significance of rheotaxis in oceanic juvenile loggerhead turtles are discussed.
authors.affiliation: Pacific Islands Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration, Honolulu, Hawaii, United States of America.
authors.forename: Donald R
authors.initials: DR
authors.lastname: Kobayashi
authors.affiliation: Aquarium des Lagons, Nouvelle-Calédonie.
authors.forename: Richard
authors.initials: R
authors.lastname: Farman
authors.affiliation: Pacific Islands Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration, Honolulu, Hawaii, United States of America.
authors.forename: Jeffrey J
authors.initials: JJ
authors.lastname: Polovina
authors.affiliation: Joint Institute for Marine and Atmospheric Research, University of Hawaii, Newport, Oregon, United States of America.
authors.forename: Denise M
authors.initials: DM
authors.lastname: Parker
authors.affiliation: Hawaii Preparatory Academy, Kamuela, Hawaii, United States of America.
authors.forename: Marc
authors.initials: M
authors.lastname: Rice
authors.affiliation: Pacific Islands Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration, Honolulu, Hawaii, United States of America.
authors.forename: George H
authors.initials: GH
authors.lastname: Balazs
mesh_terms: D025041:Animal Migration / Q000502:physiology*; D000818:Animals; D009792:Oceans and Seas; D018531:Spacecraft; D014426:Turtles / Q000502:physiology*
references.citation: PLoS One. 2013 Sep 05;8(9):e73274
references.pmid: 24039901
references.citation: J Exp Biol. 1994 May;190(1):1-8
references.pmid: 9317201
references.citation: Genetics. 2011 Nov;189(3):1069-82
references.pmid: 21890739
references.citation: J Exp Biol. 2012 Jun 1;215(Pt 11):1863-70
references.pmid: 22573765
references.citation: Curr Biol. 2011 Oct 25;21(20):R861-70
references.pmid: 22032194
references.citation: PLoS One. 2010 Nov 09;5(11):e13908
references.pmid: 21085472
references.citation: J Exp Biol. 1995;198(Pt 5):1079-85
references.pmid: 9318896
references.citation: Biometrics. 1946 Dec;2(6):110-4
references.pmid: 20287815
references.citation: PLoS Biol. 2008 Jul 15;6(7):e171
references.pmid: 18630987
references.citation: J Exp Biol. 2009 Apr;212(Pt 7):914-21
references.pmid: 19282488