WWW.WA S .ORG • WORLD AQUACULTURE • MARCH 2022 31 ( C O N T I N U E D O N P A G E 3 2 ) sightings of species of interest. While video data is an important tool and is particularly compelling to human operators, visual identification has several limitations as it requires sufficient light to view a subject, requires an animal to breach the surface and has a limited effective range. To augment visual identification, audio data from deployed hydrophones is a critical tool for detecting marine mammal species. Acoustic signals of species such as whales can travel over vast distances through the ocean and can be detected at a range of several kilometers. To harness the power of bioacoustic data, researchers at Synthetik have developed tools that use machine detect signatures of species of interest from cameras and hydrophones using machine learning models. Detection events are uploaded to an online dashboard where users can view paired video and audio recordings. Demonstration deployments of two prototype devices are currently underway in the northeast US at facilities operated by the University of New Hampshire and Salem State University to conduct system testing and gather additional data. Subaquatic Acoustic Detection Two machine learning models are critical to the operation of the DeepSeaVision platform (Fig. 1). First, a computer vision algorithm is used to process video data in real-time to identify any FIGURE 2. Spectrograms of calls from a North Atlantic right whale, orca whale and humpback whale (L-R). TABLE 1. Species included in acoustic classifier model, with performance against testing set. Co r r e c t l y I d e n t i f i e d Co r r e c t % Fa l s e l y I d e n t i f i e d Fa l s e % BaleenWhales 197 97.0 6 3.0 Bowhead Whale 30 100.0 0 0.0 Fin Whale 29 96.7 1 3.3 Gray Whale 28 93.3 2 6.7 Humpback Whale 25 83.3 5 16.7 Minke Whale 16 66.7 8 33.3 N Right Whale 28 93.3 2 6.7 S Right Whale 23 92.0 2 8.0 Pinnipeds 122 91.0 12 9.0 Leopard Seal 8 80.0 2 20.0 Ribbon Seal 28 93.3 2 6.7 Ringed Seal 28 96.6 1 3.4 Walrus 25 83.3 5 16.7 Weddell Seal 27 93.1 2 6.9 ToothedWhales 372 99.2 3 0.8 Beluga Whale 20 66.7 10 33.3 Bottlenose Dolphin 14 58.3 10 41.7 Common Dolphin 27 90.0 3 10.0 Dalls Porpoise 28 96.6 1 3.4 False Killer Whale 30 100.0 0 0.0 Harbor Porpoise 29 96.7 1 3.3 Melon Head Whale 30 100.0 0 0.0 Narwhal 30 100.0 0 0.0 Orca 29 96.7 1 3.3 Rough Tooth Dolphin 30 100.0 0 0.0 Sperm Whale 26 86.7 4 13.3 Spinner Dolphin 29 96.7 1 3.3 White Side Dolphin 25 83.3 5 16.7
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