The modular optical underwater survey system

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Abstract

The Pacific Islands Fisheries Science Center deploys the Modular Optical Underwater Survey System (MOUSS) to estimate the species-specific, size-structured abundance of commercially-important fish species in Hawaii and the Pacific Islands. TheMOUSS is an autonomous stereo-video camera system designed for the in situ visual sampling of fish assemblages. This system is rated to 500 m and its low-light, stereo-video cameras enable identification, counting, and sizing of individuals at a range of 0.5–10 m. The modular nature of MOUSS allows for the efficient and cost-effective use of various imaging sensors, power systems, and deployment platforms. The MOUSS is in use for surveys in Hawaii, the Gulf of Mexico, and Southern California. In Hawaiian waters, the system can effectively identify individuals to a depth of 250 m using only ambient light. In this paper, we describe the MOUSS’s application in fisheries research, including the design, calibration, analysis techniques, and deployment mechanism.

Figures

  • Figure 1. A Modular Optical Underwater Survey System (MOUSS) unit showing (A) frame; (B) harness; (C) digital video recorder (DVR); (D) battery module; and (E) two camera modules.
  • Table 1. MOUSS Components.
  • Figure 2. (A) The ST-CAM-1920HD camera and (B) underwater housing.
  • Figure 5. Underwater 3-D “calibration cube” from left and right cameras.
  • Figure 6. The MOUSS configuration when deployed: MOUSS unit with stereo-video camera system (two camera modules, one DVR module, one battery module, and power cables), two sub-surface floats, bait arm with cage, surface line with two surface buoys, weight, and bottom line with weak link.
  • Figure 7. Pristipomoides filamentosus, identified and measured using EventMeasure—a screen grab example from the SeaGIS EventMeasureTM desktop software package showing measurement of individual fish.
  • Figure 8. Mean number of Pristipomoides filamentosus measurement replicates with standard deviation (SD) from 20 unique fish targets per frame rate (frames per second). Columns that share a letter are not significantly different (PERMANOVA, p > 0.05). Error bars indicate +1 SD of the mean.

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APA

Amin, R., Richards, B. L., Misa, W. F. X. E., Taylor, J. C., Miller, D. R., Rollo, A. K., … Koyanagi, K. H. (2017). The modular optical underwater survey system. Sensors (Switzerland), 17(10). https://doi.org/10.3390/s17102309

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