DOI: 10.5061/dryad.v5sh63t
title: Data from: Going with the flow: hydrodynamic cues trigger directed escapes from a stalking predator

description: In the coevolution of predator and prey, different and less well
 understood rules for threat-assessment apply to freely suspended organisms
 than to substrate-dwelling ones. Particularly vulnerable are small prey
 carried with the bulk movement of a surrounding fluid and thus deprived of
 sensory information within the bow waves of approaching predators. Some
 planktonic prey have solved this apparent problem, however. We quantified
 cues generated by the slow approach of larval clownfish (Amphiprion
 ocellaris) that triggered a calanoid copepod (Bestiolina similis) to
 escape before the fish could strike. To estimate water deformation around
 the copepod immediately preceding its jump, we represented the fish’s body
 as a rigid sphere in a hydrodynamic model that we parameterized with
 measurements of fish size, approach speed, and distance to the copepod.
 Copepods of various developmental stages (CII–CVI) were sensitive to water
 flow caused by the live predator, at deformation rates as low as 0.04 s-1.
 This rate is far lower than predicted from experiments that used
 artificial predator-mimics. Additionally, copepods localized the source,
 with 87% of escapes directed away (greater than or equal to 90 degrees)
 from the predator. Thus, copepods’ survival in life-threatening situations
 relied on their detection of small nonlinear signals within an environment
 of locally linear deformation.
description: dph01_earlycopepodite_DB-1259TIFF sequence of interaction DB-1259 (1 day post-hatch fish targeting early copepodite).dph01_copepodites_DB001110-1359.zipdph03_earlycopepodite_NA-507TIFF sequence of interaction NA-507 (3 days post-hatch fish targeting early copepodite).dph03_copepodites_NA000358-607.zipdph03_earlycopepodite_NA-3547TIFF sequence of interaction NA-3547 (3 days post-hatch fish targeting early copepodite).dph03_copepodites_NA003398-3647.zipdph03_latecopepodite_MG-597TIFF sequence of interaction MG-597 (3 days post-hatch fish targeting a late copepodite).dph03_latecopepodites_MG000448-697.zipdph03_latecopepodite_MG-1059TIFF sequence of interaction MG-1059 (3 days post-hatch fish targeting a late copepodite).dph03_latecopepodites_MG000910-1159.zipdph03_latecopepodite_NC-274TIFF sequence of interaction NC-274 (3 days post-hatch fish targeting a late copepodite).dph03_latecopepodites_NC000125-374.zipdph04_earlycopepodite_OD-4201TIFF sequence of interaction OD-4201 (4 days post-hatch fish targeting an early copepodite).dph04_copepodites_OD004052-4301.zipdph04_earlycopepodite_SB-874TIFF sequence of interaction SB-874 (4 days post-hatch fish targeting an early copepodite).dph04_copepodites_SB000725-974.zipdph06_adult_YA-947TIFF sequence of interaction YA-947 (6 days post-hatch fish targeting an adult copepod).dph06_adults_YA000798-1047.zipdph06_earlycopepodite_CF-585TIFF sequence of interaction CF-585 (6 days post-hatch fish targeting an early copepodite).dph06_copepodites_CF000436-685.zipdph06_earlycopepodite_CG-704TIFF sequence of interaction CG-704 (6 days post-hatch fish targeting an early copepodite).dph06_copepodites_CG000555-804.zipdph06_latecopepodite_BC-1326TIFF sequence of interaction BC-1326 (6 days post-hatch fish targeting a late copepodite).dph06_latecopepodites_BC001177-1426.zipdph06_latecopepodite_BC-4127TIFF sequence of interaction BC-4127 (6 days post-hatch fish targeting a late copepodite).dph06_latecopepodites_BC003978-4227.zipdph07_adult_DE-8698TIFF sequence of interaction DE-8698 (7 days post-hatch fish targeting an adult copepod).dph07_adults_DE008549-8798.zipdph08_earlycopepodite_HA-3196TIFF sequence of interaction HA-3196 (8 days post-hatch fish targeting an early copepodite).dph08_copepodites_HA003047-3296.zipdph09_adult_PC-1086TIFF sequence of interaction PC-1086 (9 days post-hatch fish targeting an adult copepod).dph09_adults_PC000937-1186.zipdph09_latecopepodite_LC-422TIFF sequence of interaction LC-422 (9 days post-hatch fish targeting a late copepodite).dph09_latecopepodites_LC000273-522.zipdph09_latecopepodite_LE-1147TIFF sequence of interaction LE-1147 (9 days post-hatch fish targeting a late copepodite).dph09_latecopepodites_LE000996-1245.zipdph09_latecopepodite_LE-1917TIFF sequence of interaction LE-1917 (9 days post-hatch fish targeting a late copepodite).dph09_latecopepodites_LE001766-2015.zipdph11_earlycopepodite_TA-975TIFF sequence of interaction TA-975 (11 days post-hatch fish targeting an early copepodite).dph11_copepodites_TA000826-1075.zipdph11_earlycopepodite_TE-747TIFF sequence of interaction TE-747 (11 days post-hatch fish targeting an early copepodite).dph11_copepodites_TE000598-847.zipdph12_adult_VD-684TIFF sequence of interaction VD-684 (12 days post-hatch fish targeting an adult copepod).dph12_adults_VD000535-784.zipdph12_adult_VG-764TIFF sequence of interaction VG-764 (12 days post-hatch fish targeting an adult copepod).dph12_adults_VG000615-864.zipdph12_adult_VG-1150TIFF sequence of interaction VG-1150 (12 days post-hatch fish targeting an adult copepod).dph12_adults_VG001001-1250.zipdph13_adult_VF-711TIFF sequence of interaction VF-711 (13 days post-hatch fish targeting an adult copepod).dph13_adults_VF000562-811.zipdph14_adult_BB-1161TIFF sequence of interaction BB-1161 (14 days post-hatch fish targeting an adult copepod).dph14_adults_BB001012-1261.zipdph14_adult_BE-356TIFF sequence of interaction BE-356 (14 days post-hatch fish targeting an adult copepod).dph14_adults_BE000207-456.zipdph14_adult_ZB-2633TIFF sequence of interaction ZB-2633 (14 days post-hatch fish targeting an adult copepod).dph14_adults_ZB002485-2734.zipdph14_adult_ZC-686TIFF sequence of interaction ZC-686 (14 days post-hatch fish targeting an adult copepod).dph14_adults_ZC000537-786.zipdph14_adult_ZC-1114TIFF sequence of interaction ZC-1114 (14 days post-hatch fish targeting an adult copepod).dph14_adults_ZC000965-1214.zipREAD MEProvides a description of how data files are organized.Tuttle et al 2019 JRSI READ ME.txtTuttle et al 2019 JRSI S1 DataTuttle et al 2019 JRSI S2 Code compute flowTuttle et al 2019 JRSI S3 Code interpolate