<div><p>Copepods' approaches to and escapes from the source of a fluid disturbance were recorded on high-speed digital video (500 fps) in 3D. The optical set-up used is a scaled down version of a system described in Strickler (1998). The system, which uses beam splitters and prisms, generates in a single recorded image of two views, the front (x, z) and the side (y, z). These 3-D views were recorded high-speed digital video cameras (in Texas by a Photron FastCam Super 10K series, in Hawaii by a Kodak Motioncorder SR-3000) at 500 frames per second.</p>
<p>For the behavioral experiments, sets of individuals were transferred into the experimental chamber (1.25 x 1.25 x 4.5 cm) at densities of 7 to 15 ind mL-1 for nauplii, and 1.5 to 3 ind mL-1 for copepodites. When one or more individuals were within the camera view the hydromechanical stimulus was triggered and a video sequence that included footage from before and after the trigger was recorded.</p>
<p>The hydromechanical stimulus: a 3-mm diameter inert plastic sphere was attached to a stiff rod mounted to a piezoelectric pusher (DSM LPA 100 Dynamic Structures) and positioned in the upper quarter of the optical vessel. A pulse trigger controlled the pusher, which displaced the sphere downward by 35 microns in 0.5 ms, returning it to its initial position 60 ms later.</p></div>
Copepod escape speed from stimuli
<div><p>This dataset includes the maximum speed of escape for five species of calanoid copepod and multiple developmental stages in response to an abrupt hydromechanical stimulus (moving sphere, suction).</p>
<p><strong>These data were published in:</strong></p>
<p>Buskey, E.J., Strickler, J.R., Bradley, C.J., Hartline, D.K. and Lenz, P.H., 2017. Escapes in copepods: comparison between myelinate and amyelinate species. Journal of Experimental Biology, 220(5), pp.754-758. <a href="http://jeb.biologists.org/content/220/5/754" target="_blank">doi:10.1242/jeb.148304</a></p>
<p>Sources of data: <em>Acartia </em><em>tonsa</em> (immature stages; current study), <em>Acartia </em><em>tonsa</em> (adult females; Buskey et al. 2002); <em>Bestiolina </em><em>similis</em> (current study); <em>Eurytemora </em><em>affinis</em><em> </em>(Bradley et al. 2013); <em>Parvocalanus </em><em>crassirostris</em> (Bradley et al. 2013); <em>Centropages </em><em>hamatus</em> (Burdick et al. 2007) </p></div>
Copepod escape speed
<div><p>For the analysis, more than 800 escape sequences in response to the stimulus were reviewed and the copepods’ body-axis orientation just prior to the stimulus trigger was recorded. A sub-set of these sequences was analyzed for maximum escape speeds. For this analysis, x,z and y,z coordinates of the copepod were measured to obtain the distance moved between frames and dividing this by the time interval between frames (2 ms). Maximum escape speeds were obtained from the literature for Parvocalanus crassirostris and Eurytemora affinis (Bradley et al. 2013), Acartia tonsa adults (Buskey et al. 2002) and Centropages hamatus (Burdick et al. 2007).<br />
</p>
<p><strong>BCO-DMO Processing Notes:</strong><br />
- added conventional header with dataset name, PI name, version date<br />
- modified parameter names to conform with BCO-DMO naming conventions<br />
- transposed species and myelin_flag rows to columns to create a flat file required to serve data on BCO-DMO<br />
- replaced spaces with underscores<br />
- added missing standard deviations for Acartia tonsa male and female to the data (version:2017-04-12)</p></div>
686940
Copepod escape speed
2017-04-05T09:07:48-04:00
2017-04-05T09:07:48-04:00
2023-07-07T16:10:26-04:00
urn:bcodmo:dataset:686940
Experimental results on the speed of escape for five species of calanoid copepod and multiple developmental stages in response to artificial hydrodynamic stimuli (PreyEscape project)
false
Lenz, P., Hartline, D. K. (2017) Experimental results on the speed of escape for five species of calanoid copepod and multiple developmental stages in response to artificial hydrodynamic stimuli (PreyEscape project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). Version Date 2017-04-12 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/686940 [access date]
true
false
2017-04-12
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