Preprint Technical Note Version 1 Preserved in Portico This version is not peer-reviewed

Role of Transient Characteristics in Fish Trajectory Modeling

Version 1 : Received: 16 August 2020 / Approved: 20 August 2020 / Online: 20 August 2020 (06:03:08 CEST)

A peer-reviewed article of this Preprint also exists.

Zhu, G.; Zhou, Z.; Andersson, H.I. Role of Transient Characteristics in Fish Trajectory Modeling. Sustainability 2020, 12, 6765. Zhu, G.; Zhou, Z.; Andersson, H.I. Role of Transient Characteristics in Fish Trajectory Modeling. Sustainability 2020, 12, 6765.

Journal reference: Sustainability 2020, 12, 6765
DOI: 10.3390/su12176765

Abstract

In this paper, we analyzed the live fish trajectory recorded from an experiment in an experimental vertical slot fishway. Combined with a numerical simulation, we demonstrated that randomness shown in fish trajectory might not merely be attributed to fish's random choices in its swimming, also could be an adaption consequence to the bulk unsteady turbulent flow structure. Simple superposing the fish trajectory on the time-averaged flow field obtained either by interpolating on discrete point measurements or numerical simulation is not an ideal method for fish movement description in fishway engineering. How to model the fish paths in transient flow and the necessity of simultaneous recording of the flow field and the fish locomotion are challenging topics. The suggested spectrum analysis of the flow field may provide a new general method to reproduce the fish trajectory in a complex turbulent flow.

Subject Areas

Fishway; Trajectory; CFD; Measurement; Modelling

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