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Estimating the probability of fish encountering a marine hydrokinetic device

Journal Article · · Renewable Energy
 [1];  [2];  [2];  [2]
  1. University of Maine, Orono, ME (United States); University of Maine
  2. University of Maine, Orono, ME (United States)
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We report strong tidal currents in eastern Maine, USA, make that region attractive for tidal power development. We know very little about the effects of marine hydrokinetic (MHK) devices on fish, yet many fish species use tidal currents for movements. We used empirical data from stationary and mobile hydroacoustic surveys to examine the probability that fish would be at the depth of an MHK device and may therefore encounter it. The probability was estimated using three components: 1) probability of fish being at device-depth when the device was absent; 2) probability of fish behavior changing to avoid the device in the far-field; and 3) probability of fish being at device-depth in the near-field when the device was present. Furthermore, there were differences in probabilities of fish encountering the MHK device based on month, diel condition and tidal stage. The maximum probability of fish encountering the whole device was 0.432 (95% CI: [0.305, 0.553]), and the probability of fish encountering only device foils was 0.058 (95% CI: [0.043, 0.073]). Mobile hydroacoustics indicated that fish likely avoided the device with horizontal movement beginning 140 m away. Finally, we estimated the encounter probability for one device, but results can be applied to arrays, which may have bay-wide implications.
Research Organization:
University of Maine, Orono, ME (United States)
Sponsoring Organization:
USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Contributing Organization:
Ocean Renewable Power Company
Grant/Contract Number:
EE0003647; EE0006384
OSTI ID:
1332321
Alternate ID(s):
OSTI ID: 1323955
Journal Information:
Renewable Energy, Journal Name: Renewable Energy Journal Issue: C Vol. 97; ISSN 0960-1481
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

16 TIDAL AND WAVE POWER
Bayesian generalized linear model
MHK device
encounter probability
fish
hydroacoustics
tidal energy