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A multidisciplinary approach to estimating red snapper, Lutjanus campechanus, behavioral response to mobile camera and sonar sampling gears
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2022
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Source: Fisheries Research, 246, 106155
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Journal Title:Fisheries Research
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Description:We examined the potential for Gulf of Mexico red snapper (RS) behavior to bias count estimates collected with a remotely operated vehicle (ROV), towed camera sled (TCS), subsurface towed acoustic sled (TAS), or SCUBA diver at artificial reef sites. Near- (≤ 5 m), mid- (≤ 15 m), and far-field (≤ 100 m) responses were examined using stationary stereo cameras, a horizontal acoustic profiler, and three-dimensional acoustic telemetry, respectively. Survey gears were deployed sequentially for 15 min with each gear immediately preceded by a 15-min control period. Near-field data (mean RS min−1) indicated counts were 7.3 times higher with the diver present and 1.9 times higher with the ROV. The TCS had a significant interaction effect with time on mean RS count in the near- and mid-field, as well as depth and acceleration. The TAS had no effect on RS behavior at any scale. Far-field data showed no significant effect of any gear on mean RS distance to reef. Overall, results indicate RS respond neutrally to survey gears at medium (≤ 15 m) to large (≤ 100 m) spatial scales, but small-scale (≤ 5 m) spatial attraction may bias RS counts with benthic survey gears, primarily by individuals near the periphery of the surveyed area approaching the gear.
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Source:Fisheries Research, 246, 106155
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DOI:
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ISSN:0165-7836
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Rights Information:Accepted Manuscript
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Compliance:Submitted
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