scholarly journals Comparing methodologies in marine habitat monitoring research: An assessment of species-habitat relationships as revealed by baited and unbaited remote underwater video systems

2020 ◽  
Vol 526 ◽  
pp. 151315 ◽  
Author(s):  
Nicole Rhodes ◽  
Tim Wilms ◽  
Henrik Baktoft ◽  
Gesine Ramm ◽  
Jeannet Lillegaard Bertelsen ◽  
...  
Keyword(s):  
Underwater Video ◽  
Marine Habitat ◽  
Habitat Monitoring ◽  
Video Systems

Use of stereo baited remote underwater video systems to estimate the presence and size of white sharks (Carcharodon carcharias)

2017 ◽  
Vol 68 (7) ◽  
pp. 1391 ◽  
Author(s):  
D. Harasti ◽  
K. A. Lee ◽  
R. Laird ◽  
R. Bradford ◽  
B. Bruce
Keyword(s):  
Relative Abundance ◽  
Fish Assemblages ◽  
New South ◽  
Underwater Video ◽  
Carcharodon Carcharias ◽  
South Wales ◽  
Video Systems ◽  
Near Shore ◽  
Number Of Individuals ◽  
Non Destructive

Stereo baited remote underwater video systems (stereo-BRUVs) are commonly used to assess fish assemblages and, more recently, to record the localised abundance and size of sharks. The present study investigated the occurrence and size of white sharks (Carcharodon carcharias) in the near-shore environment off Bennett’s Beach, part of a known nursery area for the species in central New South Wales, Australia. Six stereo-BRUV units were deployed approximately fortnightly between August and December 2015 for periods of 5h in depths of 7–14m. Stereo-BRUVs successfully recorded 34 separate sightings of 22 individual white sharks. The highest number of individuals detected during a single day survey was eight. All C. carcharias observed on stereo-BRUVs were juveniles ranging in size from 1.50 to 2.46-m total length (mean±s.e., 1.91±0.05m; n=22). The time to first appearance ranged from 15 to 299min (mean±s.e., 148±15min). This study demonstrates that the use of stereo-BRUVs is a viable, non-destructive method to obtain estimates of the size and presence of white sharks, and may be useful in estimating relative abundance in near-shore environments where white sharks are known to frequent.

scholarly journals A Time-Extended (24 h) Baited Remote Underwater Video (BRUV) for Monitoring Pelagic and Nocturnal Marine Species

2020 ◽  
Vol 8 (3) ◽  
pp. 208 ◽  
Author(s):  
Agusti Torres ◽  
Ana-Maria Abril ◽  
Eric E. G. Clua
Keyword(s):  
Cost Effective ◽  
Marine Species ◽  
Western Mediterranean ◽  
Video Data ◽  
Battery Life ◽  
Underwater Video ◽  
Marine Animals ◽  
Video Systems ◽  
Extended Duration ◽  
Technological Constraints

Baited remote underwater video systems (BRUVs) are efficient devices for remotely characterising the assemblage and relative density of fishes and other marine organisms. However, technological constraints (e.g., battery life and limited storage memory) typically limit deployment times to <2 h making it very difficult to capture the presence of marine species, including rare and elusive ones. We developed an extended duration (24 h) BRUV to enable fisheries-independent surveying of a pelagic shark population in the western Mediterranean. Video data revealed seven visits (three nocturnal, four diurnal) by blue sharks (Prionace glauca) over a period of 1355 h. In the future, this cost-effective device could be fitted with a wireless video transmitter to provide real-time observations of marine animals for scientific or ecotourism purposes.

scholarly journals Comparative Population Assessments of Nautilus sp. in the Philippines, Australia, Fiji, and American Samoa Using Baited Remote Underwater Video Systems

PLoS ONE ◽  
2014 ◽  
Vol 9 (6) ◽  
pp. e100799 ◽  
Author(s):  
Gregory J. Barord ◽  
Frederick Dooley ◽  
Andrew Dunstan ◽  
Anthony Ilano ◽  
Karen N. Keister ◽  
...  
Keyword(s):  
American Samoa ◽  
The Philippines ◽  
Underwater Video ◽  
Video Systems ◽  
Comparative Population

scholarly journals An experimental comparison of three towed underwater video systems using species metrics, benthic impact and performance

2016 ◽  
Vol 7 (7) ◽  
pp. 843-852 ◽  
Author(s):  
Emma V. Sheehan ◽  
Sandrine Vaz ◽  
Erin Pettifer ◽  
Nicola L. Foster ◽  
Sarah J. Nancollas ◽  
...  
Keyword(s):  
Experimental Comparison ◽  
Underwater Video ◽  
Video Systems ◽  
And Performance

scholarly journals Marine Habitat Recovery of Five Derelict Gear Removal Sites in Puget Sound

2018 ◽  
Author(s):  
Jeffrey June ◽  
Kyle Antonelis
Keyword(s):  
Puget Sound ◽  
Growing Season ◽  
Fishing Gear ◽  
Accumulation Rates ◽  
Marine Habitat ◽  
Habitat Monitoring ◽  
Habitat Recovery ◽  
Marine Habitats ◽  
Derelict Fishing Gear ◽  
Eelgrass Beds

Reports on the findings of a post-derelict net removal habitat monitoring project in Puget Sound. This study had three objectives. First was to document impacts ofderelict fishing gear on marine habitats. Second was to monitor the recovery of thesehabitats after derelict fishing gear was removed. Third was to monitor sites for newlylost fishing gear to determine re-accumulation rates at these sites. This study showed that marine habitat service functions are negatively affected by derelict fishing gear. It showed that natural ocean processes succeed in restoring these service functions within a single growing season after derelict fishing gear removal for areas dominated by kelp. Eelgrass beds take longer to recover, but can improve by 30% in less than a year.

Seagrass-Watch: Engaging Torres Strait Islanders in marine habitat monitoring

2008 ◽  
Vol 28 (16) ◽  
pp. 2339-2349 ◽  
Author(s):  
Jane E. Mellors ◽  
Len J. McKenzie ◽  
Robert G. Coles
Keyword(s):  
Marine Habitat ◽  
Habitat Monitoring ◽  
Torres Strait

scholarly journals Complex yet fauna-deficient seagrass ecosystems at risk in southern Myanmar

2018 ◽  
Vol 61 (3) ◽  
pp. 193-203 ◽  
Author(s):  
Benjamin L. Jones ◽  
Leanne C. Cullen-Unsworth ◽  
Robert Howard ◽  
Richard K.F. Unsworth
Keyword(s):  
Fish Assemblages ◽  
Marine Ecosystems ◽  
Global Studies ◽  
Baseline Assessment ◽  
Underwater Video ◽  
Associated Fauna ◽  
Seagrass Meadows ◽  
Marine Park ◽  
Video Systems ◽  
Seagrass Ecosystems

AbstractDependence on seafood across Southeast Asia is extensive. Myanmar is no exception, but the country’s provisioning marine ecosystems are threatened. Seagrass is one habitat that is frequently overlooked in management as an important fisheries resource, despite its nursery function. In Myanmar, research on seagrass habitats is particularly sparse, and as a result, our understanding of seagrass exploitation remains limited. In this study, we provide a baseline assessment of the seagrass-associated fish assemblages at four locations in the Myeik Archipelago in southern Myanmar using mono Baited Remote Underwater Video systems. Across the sites surveyed only 12 taxa of motile fauna were recorded. Relative to other regional and global studies, this figure is meagre. Our data adds to a growing literature suggesting that the marine ecosystems of Myanmar are in a worrying state. Despite the lack of recorded seagrass associated fauna, our study revealed minimal impacts to seagrass meadows from eutrophication or sedimentation, and the meadows included appeared to be healthy. The sites with the highest number of motile fauna were within Myanmar’s only National Marine Park offering some optimism for the effectiveness of protection, but further assessments are required to allow targeted management of Myanmar’s seagrass meadows.

The Use of Baited Remote Underwater Video Systems (BRUVS) to Noninvasively Characterize a White Shark (Carcharodon carcharias) Nursery Area off Eastern Long Island, New York

2021 ◽  
Vol 55 (1) ◽  
pp. 29-37
Author(s):  
Craig P. O'Connell ◽  
David Dayan ◽  
Christian Healy ◽  
Pingguo He
Keyword(s):  
New York ◽  
Species Conservation ◽  
White Shark ◽  
Video Data ◽  
Nursery Area ◽  
Underwater Video ◽  
Carcharodon Carcharias ◽  
Nursery Areas ◽  
Video Systems ◽  
Juvenile Sharks

AbstractUnderstanding if a discrete region fits three key criteria for shark nursery area designation is of utmost importance. Such a designation within United States territorial waters could result in the implementation of an Essential Fish Habitat (EFH) classification, a determination facilitating species protection. In this study, baited remote underwater video systems (BRUVS) were used to determine if they could effectively confirm a previously identified white shark (Carcharodon carcharias) nursery area south of Montauk, New York, so that the technique may be applied in other potential nursery areas. During experimentation, 1,348.32 h of video data were collected between Region A (Block Island Sound; 674.16 h), outside of the previously identified nursery area, and Region B (Atlantic Ocean; 674.16 h), within the identified nursery area. From the video data, 35 sightings of C. carcharias were recorded, with 31 unique individuals identified. Data associated with Region B fit all three nursery area criteria: (a) young-of-the-year (YOY) and juvenile sharks were more commonly found in this region over Region A (p < 0.001), (b) several YOY and juvenile sharks (n = 4) were resighted in this region within a given year (e.g., average resighting duration: 10.5 days), and (c) YOY and juvenile sharks exhibited repeated use of this region over multiple years. We conclude that BRUVS can be used for fine-scale analyses to help designate a discrete area(s) as a shark nursery, even in turbid New York waters. Therefore, using BRUVS to identify shark nursery areas is a viable and noninvasive approach that can contribute to species conservation.

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