Landers

Jamieson, Alan J.

doi:10.1002/9781118332535.ch11

Cited by 14 publications

(18 citation statements)

References 102 publications

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“…A major advantage of the NGS deep-sea camera system method, as with other BRUVS, is that it is a non-extractive technique, and can be used in delicate habitats (e.g., deep-sea coral gardens) (Jamieson, 2016;Whitmarsh et al, 2017;Levin et al, 2019). Further, for fish communities, an advantage of video rather than physical sampling, is that slender bodied species (e.g., Synaphobranchus sp.)…”

Section: Advantages and Limitations Of Methodsmentioning

confidence: 99%

“…Measures of density per unit volume are not obtained directly from survey footage because the current speed and direction affect the bait plume area of detection (Priede and Merrett, 1998). Therefore, any measure of density from baited cameras is considered theoretical based on models of the bait plume over distance and time (Priede and Merrett, 1998;Jamieson, 2016). The odor detection threshold is unknown for most species, however theoretical models predict a plume area of 0.6 km 2 after 6 h, and 2.4 km 2 after 12 h (assuming an average current speed of 0.05 ms −1 ) (Jamieson, 2016).…”

Section: Advantages and Limitations Of Methodsmentioning

confidence: 99%

“…The video survey time is programmed prior to deployment. It is likely that deep-sea camera deployments should last a minimum of 6 h, even at the shallow depth-range (e.g., 200 m), based on the bait plume detection (Priede and Merrett, 1998;Jamieson, 2016). Just prior to deployment, the beacon and camera system are activated by removing magnets that otherwise keep those systems off.…”

Section: Deployment Processmentioning

confidence: 99%

“…The system is designed to optimize the survey field of view and the ability to identify distinguishing characteristics of mobile taxa (e.g., pectoral and anal fins, head characteristics) ( Figures 3A,B,F). This optimization is achieved with the oblique camera angle, which permits larger areas of seafloor to be visible compared with downward-facing (vertical) photography (Jamieson, 2016). This combination of camera and angle (Ultra-High Definition at 45 • ), LED lighting (1530 lm), and altitude (2 m above the seafloor) provides sufficient field of view (horizontal = 62.27 • , vertical = 37.53 • ) and lighting to identify large mobile taxa.…”

Section: Ngs Deep-sea Imaging System Performancementioning

confidence: 99%

“…The NGS deep-sea camera system is free to spin in full 360degree rotation around the anchor line axis, typically due to current, or an animal coming into physical contact with the camera. One disadvantage of this design compared to downward facing cameras, is that if the angled camera is facing away from where the animal is approaching, the video could miss the exact time of arrival (Jamieson, 2016). To capture the variability of survey area observed, rotation degree is recorded in the annotation process, quantified as a portion of a full 360-degree view (e.g., 90, 180, 270, and 360) represented during the deployment.…”

Section: Ngs Deep-sea Imaging System Performancementioning

confidence: 99%

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The National Geographic Society Deep-Sea Camera System: A Low-Cost Remote Video Survey Instrument to Advance Biodiversity Observation in the Deep Ocean

et al. 2021

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There is a growing need for marine biodiversity baseline and monitoring data to assess ocean ecosystem health, especially in the deep sea, where data are notoriously sparse. Baited cameras are a biological observing method especially useful in the deep ocean to estimate relative abundances of scavenging fishes and invertebrates. The National Geographic Society Exploration Technology Lab developed an autonomous benthic lander platform with a baited camera system to conduct stationary video surveys of deep-sea megafauna. The first-generation landers were capable of sampling to full ocean depth, however, the form factor, power requirements, and cost of the system limited deployment opportunities. Therefore, a miniaturized version (76 cm × 76 cm × 36 cm, 18 kg in air) was developed to provide a cost-effective method to observe ocean life to 6000 m depth. Here, we detail this next-generation deep-sea camera system, including the structural design, scientific payload, and the procedures for deployment. We provide an overview of NGS deep-sea camera system deployments over the past decade with a focus on the performance improvements of the next-generation system, which began field operations in 2017 and have performed 264 deployments. We present example imagery and discuss the strengths and limitations of the instrument in the context of existing complementary survey methods, and for use in down-stream data products. The key operational advantages of this new instrument are spatial flexibility and cost-efficiency. The instrument can be hand-deployed by a single operator from a small craft concurrent with other shipboard operations. The main limitation of the system is battery power, which allows for 6 h of continuous recording, and takes up to 8 h to recharge between deployments. Like many baited-camera methods, this instrument is specialized to measure the relative abundance of mobile megafauna that are attracted to bait, which results in a stochastic snapshot of the species at the deployment location and time. The small size and ease of deployment of this next-generation camera system allows for increased sample replication on expeditions, and presents a path forward to advance cost-effective biological observing and sustained monitoring in the deep ocean.

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Section: Advantages and Limitations Of Methodsmentioning

confidence: 99%

Section: Advantages and Limitations Of Methodsmentioning

confidence: 99%

Section: Deployment Processmentioning

confidence: 99%

Section: Ngs Deep-sea Imaging System Performancementioning

confidence: 99%

Section: Ngs Deep-sea Imaging System Performancementioning

confidence: 99%

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The National Geographic Society Deep-Sea Camera System: A Low-Cost Remote Video Survey Instrument to Advance Biodiversity Observation in the Deep Ocean

et al. 2021

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Deep Sea Research Methods to Be Used During the Exploration of the Mid-Atlantic Ridge Polymetallic Sulphide Areas

Radziejewska,

Węsławski,

Tomczak

et al. 2024

GeoPlanet: Earth and Planetary Sciences

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Bathyal and abyssal demersal bait-attending fauna of the Eastern Mediterranean Sea

et al. 2018

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Baited cameras were deployed over a depth range of 532–5111 m in the Ionian Sea to characterise the large mobile fauna. The planned installation of a neutrino telescope also offers the potential for biological observatories. The current study was intended to aid observatory placement. At increasing depths, sediment was observed to become more uniform and animal burrows and tracks reduced. A total of 10 species of deep-sea fishes were identified from images; four elasmobranchs, which were not recorded deeper than 1841 m, and six teleosts. At depths > 3000 m, including Calypso Deep, the deepest point in the Mediterranean, only one fish species was observed; the Mediterranean grenadier, Coryphaenoides mediterraneus (3400–5111 m), extending this species’ maximum recorded depth to 5111 m. Four species of decapod crustacea could be identified from images. The dressed deep-sea shrimp, Acanthephyra eximia (1346–5111 m) was the only invertebrate recorded at abyssal depths, including the deepest point. A faunal change was detected at ~ 1000 m depth. Incorporating other studies from the Eastern Mediterranean identified additional faunal boundaries at ~ 1500 m and ~ 2500 m. The time from landing the observation equipment to the arrival of the first fish increased exponentially with depth at a slower rate to that observed in the Atlantic Ocean. The estimated density of bait-attending deep-sea fish was, therefore, significantly impoverished compared to the Atlantic Ocean at equivalent depth. Barriers to colonisation, low resource input, and high temperature at depth relative to the Atlantic Ocean are probable causes of the impoverished fauna.Electronic supplementary materialThe online version of this article (10.1007/s00227-018-3413-0) contains supplementary material, which is available to authorized users.

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Landers

Cited by 14 publications

References 102 publications

The National Geographic Society Deep-Sea Camera System: A Low-Cost Remote Video Survey Instrument to Advance Biodiversity Observation in the Deep Ocean

The National Geographic Society Deep-Sea Camera System: A Low-Cost Remote Video Survey Instrument to Advance Biodiversity Observation in the Deep Ocean

Deep Sea Research Methods to Be Used During the Exploration of the Mid-Atlantic Ridge Polymetallic Sulphide Areas

Bathyal and abyssal demersal bait-attending fauna of the Eastern Mediterranean Sea

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