A Systematic Review of Remotely Operated Vehicle Surveys for Visually Assessing Fish Assemblages

Sward, Darryn; Monk, Jacquomo; Barrett, Neville S.

doi:10.3389/fmars.2019.00134

Cited by 68 publications

(51 citation statements)

References 100 publications

(163 reference statements)

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“…To avoid tension on the tether and ensure new ground was covered, the ROV was maneuvered in an expanding square around the vessel (similar to polygonal patterns described in Ref. 47 , 48 ). During image analysis, the imagery was split into 5 m × 50 m transects (250 m 2 ) with a 20 m separation between the end and start of transects as per the pipelines.…”

Section: Methodsmentioning

confidence: 99%

Fish associations with shallow water subsea pipelines compared to surrounding reef and soft sediment habitats

Schramm

Marnane

Elsdon

et al. 2021

Sci Rep

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Offshore decommissioning activities are expected to increase as oil and gas subsea infrastructure becomes obsolete. Decisions on decommissioning alternatives will benefit from quantifying and understanding the marine communities associated with these structures. As a case study, fish assemblages associated with an inshore network of subsea pipelines located on the North West shelf of Western Australia were compared to those in surrounding natural reef and soft sediment habitats using remotely operated vehicles fitted with a stereo-video system (stereo-ROVs). The number of species, the abundance, biomass, feeding guild composition and the economic value of fishes were compared among habitats. The community composition of fish associated with pipelines was distinct from those associated with natural habitats, and was characterised by a greater abundance and/or biomass of fish from higher trophic levels (e.g. piscivores, generalist carnivores and invertivores), including many species considered to be of value to commercial and recreational fishers. Biomass of fish on pipelines was, on average, 20 times greater than soft sediments, and was similar to natural reefs. However, the biomass of species considered important to fisheries recorded on the pipelines was, on average 3.5 times greater than reef and 44.5 times greater than soft sediment habitats. This study demonstrates that fish assemblages on the pipeline infrastructure exhibit high ecological and socioeconomic values.

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Section: Methodsmentioning

confidence: 99%

Fish associations with shallow water subsea pipelines compared to surrounding reef and soft sediment habitats

Schramm

Marnane

Elsdon

et al. 2021

Sci Rep

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show abstract

“…Behavioral reactions of fishes to submersibles have been documented, including avoidance, attraction, and no reaction (Stoner et al, 2008;Laidig et al, 2012;Sward et al, 2019). As Sward et al (2019) state in their review of ROV surveys for visually assessing fish assemblages: "the type and severity of the reaction to the ROV can be influenced by a variety of factors, including the species, trophic position, and the body size and position of the individual relative to the seafloor as well as to different aspects of the ROV system (i.e., artificial lighting, thruster noise, speed)." Laidig et al (2012) found that a smaller percentage of fishes (11%) reacted to the larger, manned submersibles (as we used in this study) than to ROVs (57%).…”

Section: Discussionmentioning

confidence: 99%

“…Finally, although the distribution of many species is influenced by time of day (Hart et al, 2010), our study only examined movement during the day. In their review, Sward et al (2019) found that very few submersible studies (∼2%) were conducted at night. Telemetry studies have indicated that home ranges and behavior of Pacific rockfishes change both diurnally and seasonally (Tolimieri et al, 2009;Zhang et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

“…Underwater video collected with these platforms is a vast improvement over previous collection methods, because we can observe the locations of fishes and DSCS relative to one another. These data generally are collected along line transects through habitats and, like many sampling methods, provide only a 'snapshot' of the associations between fishes and DSCS (Sward et al, 2019). These data required a new definition of what constitutes an association between fishes and structureforming invertebrates.…”

Section: Introductionmentioning

confidence: 99%

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Deep-Sea Coral and Sponge Taxa Increase Demersal Fish Diversity and the Probability of Fish Presence

2020

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Fishes are known to use deep-sea coral and sponge (DSCS) species as habitat, but it is uncertain whether this relationship is facultative (circumstantial and not restricted to a particular function) or obligate (necessary to sustain fish populations). To explore whether DSCS provide essential habitats for demersal fishes, we analyzed 10 years of submersible survey video transect data, documenting the locations and abundance of DSCS and demersal fishes in the Southern California Bight (SCB). We first classified the different habitats in which fishes and DSCS taxa occurred using cluster analysis, which revealed four distinct DSCS assemblages based on depth and substratum. We then used logistic regression and gradient forest analysis to identify the ecological correlates most associated with the presence of rockfish taxa (Sebastes spp.) and biodiversity. After accounting for spatial autocorrelation, the factors most related to the presence of rockfishes were depth, coral height, and the abundance of a few key DSCS taxa. Of particular interest, we found that young-of-the-year rockfishes were more likely to be present in locations with taller coral and increased densities of Plumarella longispina, Lophelia pertusa, and two sponge taxa. This suggests these DSCS taxa may serve as important rearing habitat for rockfishes. Similarly, the gradient forest analysis found the most important ecological correlates for fish biodiversity were depth, coral cover, coral height, and a subset of DSCS taxa. Of the 10 top-ranked DSCS taxa in the gradient forest (out of 39 potential DSCS taxa), 6 also were associated with increased probability of fish presence in the logistic regression. The weight of evidence from these multiple analytical methods suggests that this subset of DSCS taxa are important fish habitats. In this paper we describe methods to characterize demersal communities and highlight which DSCS taxa provide habitat to demersal fishes, which is valuable information to fisheries agencies tasked to manage these fishes and their essential habitats.

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“…Firstly, data availability has increased with access to the Internet, accessible by the public since August 1991 and the popularity of YouTube (founded in 2005) over the last few years. Additionally, the greatest issue of industrial ROV data is the restricted access to commercially sensitive imagery, often protected by NDAs; therefore, partnerships between industry and scientists are invaluable to gain access to otherwise inaccessible data and researchers should be encouraged to consult archived data (Sward et al, 2019;Todd et al, 2019;McLean et al, 2020).…”

Section: Diving To New Depthsmentioning

confidence: 99%

Underwater Visual Records of Marine Megafauna Around Offshore Anthropogenic Structures

Todd

Lazar²,

Williamson

et al. 2020

Front. Mar. Sci.

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A Systematic Review of Remotely Operated Vehicle Surveys for Visually Assessing Fish Assemblages

Cited by 68 publications

References 100 publications

Fish associations with shallow water subsea pipelines compared to surrounding reef and soft sediment habitats

Fish associations with shallow water subsea pipelines compared to surrounding reef and soft sediment habitats

Deep-Sea Coral and Sponge Taxa Increase Demersal Fish Diversity and the Probability of Fish Presence

Underwater Visual Records of Marine Megafauna Around Offshore Anthropogenic Structures

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