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Chapman, Jason W.; Nilsson, Cecilia; Lim, Ka S.; Bäckman, Johan; Reynolds, Don R.; Alerstam, Thomas; Reynolds, Andy M. (2015)
Publisher: Elsevier BV
Journal: Current Biology
Languages: English
Types: Article
Subjects: Agricultural and Biological Sciences(all), Biochemistry, Genetics and Molecular Biology(all), QH, S1
Goal-oriented migrants travelling through the sea or air must cope with the effect of cross-flows during their journeys if they are to reach their destination 1, 2 and 3. In order to counteract flow-induced drift from their preferred course, migrants must detect the mean flow direction, and integrate this information with output from their internal compass, to compensate for the deflection. Animals can potentially sense flow direction by two nonexclusive mechanisms: either indirectly, by visually assessing the effect of the current on their movement direction relative to the ground; or directly, via intrinsic properties of the current [4]. Here, we report the first evidence that nocturnal compass-guided insect migrants use a turbulence-mediated mechanism for directly assessing the wind direction hundreds of metres above the ground. By comparison, we find that nocturnally-migrating songbirds do not use turbulence to detect the flow; instead they rely on visual assessment of wind-induced drift to indirectly infer the flow direction.
  • The results below are discovered through our pilot algorithms. Let us know how we are doing!

    • 1. Chapman, J.W., Klaassen, R.H.G., Drake, V.A., Fossette, S., Hays, G.C., Metcalfe, J.D., Reynolds, A.M., Reynolds, D.R., and Alerstam, T. (2011). Animal orientation strategies for movement in flows. Curr. Biol. 21, R861-R870.
    • 2. Hays, G.C., Christensen, A., Fossette, S., Schofield, G., Talbot, J., and Mariani, P. (2014). Route optimisation and solving Zermelo's navigation problem during long distance migration in cross flows. Ecol. Lett. 17, 137-143.
    • 3. McLaren, J.D., Shamoun-Baranes, J., Dokter, A.M., Klaassen, R.H.G., and Bouten, W. (2014). Optimal orientation in flows: providing a benchmark for animal movement strategies. J. R. Soc. Interface, 11, 20140588.
    • 4. Reynolds, A.M., Reynolds, D.R., Smith, A.D., and Chapman, J.W. (2010). A single windmediated mechanism explains high-altitude 'non-goal oriented' headings and layering of nocturnally-migrating insects. Proc. Biol. Sci. 277, 765-772.
    • 5. Chapman, J.W., Reynolds, D.R., and Wilson, K. (2015). Long-range seasonal migration in insects: mechanisms, evolutionary drivers and ecological consequences. Ecol. Lett. 18, 287-302.
    • 6. Chapman, J.W., Nilsson, C., Lim, K.S., Bäckman, J., Reynolds, D.R., and Alerstam, T. (2015). Adaptive strategies in nocturnally migrating insects and songbirds: contrasting responses to wind. J. Anim. Ecol. (in press).
    • 7. Chapman, J.W., Reynolds, D.R., Hill, J.K., Sivell, D., Smith, A.D., and Woiwod, I.P. (2008). A seasonal switch in compass orientation in a high-flying migratory moth. Curr. Biol. 18, R908-R909.
    • 8. Fossette, S., Gleiss, A.C., Chalumeau, J., Bastian, T., Armstrong, C.D., Vandenabeele, S.. Karpytchev, M., and Hays, G.C. (2015). Currentoriented swimming by jellyfish in the absence of a fixed reference frame and the role in bloom maintenance. Curr. Biol. 25, 342-347.
    • 9. Genin, A., Jaffe, J.S., Reef, R., Richter, C., and Franks, P.J. (2005). Swimming against the flow: a mechanism of zooplankton aggregation. Science 308, 860-862.
    • 10. Kobayashi, D.R., Farman, R., Polovina, J.J., Parker, D.M., Rice, M., and Balazs, H. (2014). “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. PLoS One 9, e103701.
    • 1Rothamsted Research, Harpenden, Hertfordshire, AL5 2JQ, UK. 2Environment and Sustainability Institute, University of Exeter, Penryn, Cornwall, TR10 9EZ, UK.
    • 3Department of Biology, Lund University, SE-223 62 Lund, Sweden. 4Natural Resources Institute, University of Greenwich, Chatham, Kent, ME4 4TB, UK.
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