Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 434287
Title Three-dimensional escape trajectories in larval fish
Author(s) Ryan, D.S.; Berg, O.; Feitl, K.E.; Mchenry, M.J.; Müller, U.K.
Event SICB 2012 Annual Meeting, The Society for Integrative & Comparative Biology, Charleston, SC, USA, 2012-01-03/2012-01-07
Department(s) Experimental Zoology
WIAS
Publication type Abstract in scientific journal or proceedings
Publication year 2012
Abstract Fish execute C starts when they escape from a threat. The neural control, body kinematics and hydrodynamics of escape responses have been studied extensively in adult and larval fish. However, due to experimental constraints, biomechanical studies have focused on mapping the body movements and the center-of-mass trajectories from a dorsal view, neglecting the vertical dimension. These 2-dimensional studies suggest that prey randomize their escape trajectories, but bias the response away from the stimulus. This study explored the escape response of larval fish to a horizontal startle stimulus by recording the trajectories in three dimensions. We used a piston to generate a brief suction event simulating a predator attack. Consistent with published findings, our pilot data show that escape responses occurred either away or toward the stimulus in a horizontal plane, there seemed to be also no preference for left or right. However, zebrafish larvae consistently responded to a horizontal stimulus with a downward escape trajectory. We developed several hypotheses: (1) Demersal lifestyle: zebrafish larvae are demersal and might therefore always escape towards the substrate; (2) Insufficient pitch control: fish larvae are more dorso-ventrally asymmetric and have smaller pitch control surfaces than adults and therefore experience a stronger downward pitch; (3) Directional response: fish larvae process the direction of the stimulus and select a trajectory biased away from the stimulus. To test whether larvae use the stimulus direction to bias their escape response or default to a downward trajectory due to behavioral or mechanical constraints, we vary the direction of the stimulus
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