Using remote underwater video to estimate freshwater fish species richness

Ebner, Brendan C.; Morgan, David L.

doi:10.1111/jfb.12096

Cited by 54 publications

(34 citation statements)

References 44 publications

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“…Any application of our boat-based UVC methodology to other environments should consider the influence of depth of deployment and habitat complexity on fish detection probability. Ebner and Morgan (2013) found that the camera deployment in shallow, vegetated environments observed different freshwater fishes than cameras deployed in deeper waters, and the influence of baited cameras slightly increased the detection of some species. Future application may also improve by evaluating the time of arrival for a variety of fishes to establish effective deployment times and quantifying behaviours observed among individual fishes to quantify habitat use (e.g.…”

Section: Discussionmentioning

confidence: 93%

“…Fish arrival rates and time of MaxN can be different among fish species and can be a predictor variable in fish density estimates influencing the duration of sampling events for many fishes, particularly slow-moving or cryptic species (Priede and Merrett 1998;Cappo et al 2004). Ebner and Morgan (2013) found most freshwater fish species in Australian waterholes were detected within 10 min of underwater camera deployments while Ellender et al (2012) found that two imperilled freshwater fish in African streams were observed within 15-22 min. This supports our assumption that any sampling or behavioural biases within Lepomis spp.…”

Section: Discussionmentioning

confidence: 99%

“…Increasingly, marine studies utilise underwater video cameras (UVC) as a means to obtain count data and behaviour of fish communities as these methods present a viable, non-lethal alternative to traditional fish sampling techniques useful in a variety of habitats (Priede and Merrett 1998;Cappo et al 2004;Sheehan et al 2010;Favaro et al 2012). Currently, the use of UVC to sample fish in freshwater ecosystems has been limited to behavioural and species richness studies, not population-level analyses or evaluations of their utility in submersed aquatic vegetation habitats (Chidami et al 2007;Martin and Irwin 2010;Ebner and Morgan 2013). Given this knowledge-gap, our objectives were to: (1) develop methods for use of UVC to estimate fish abundance in dense submersed aquatic vegetation; (2) evaluate how these methods performed with manipulations of fish populations in experimental ponds; and (3) discuss how these methodologies can be broadly applied to freshwater fisheries management.…”

Section: Introductionmentioning

confidence: 99%

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Use of underwater video to assess freshwater fish populations in dense submersed aquatic vegetation

Wilson¹,

Allen²,

Ahrens³

et al. 2015

Mar. Freshwater Res.

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Underwater video cameras (UVC) provide a non-lethal technique to sample fish in dense submersed aquatic vegetation. Fish often inhabit densely vegetated areas, but deficiencies of most sampling gears bias relative abundance estimates that inform fisheries management. This study developed methods using UVC to estimate relative abundance in dense vegetation using three experimental ponds covered with surface-matted hydrilla (Hydrilla verticillata) stocked at different densities of Lepomis spp. and largemouth bass (Micropterus salmoides). We conducted UVC point counts over 13 weeks to measure relative fish abundance and occurrence from video analysis. Ponds were then drained to obtain true fish densities. In total, fish were detected in 55% of all counts and juvenile and adult Lepomis spp. and largemouth bass were enumerated. End-of-season true fish densities ranged across ponds (from 52 to 37 000 fish ha À1 ). Additionally, pond 2's true density changed substantially from 370 to 12 300 fish ha À1 . True population size was accurately reflected in differences in estimated relative abundances obtained from fish counts, as in pond 2 where mean fish counts increased from 0.10 in week 1 to 2.33 by week 13. Underwater video accurately and precisely quantified relative abundance at naturally-occurring fish densities, but this success was reduced at low densities.

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Section: Discussionmentioning

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Use of underwater video to assess freshwater fish populations in dense submersed aquatic vegetation

Wilson¹,

Allen²,

Ahrens³

et al. 2015

Mar. Freshwater Res.

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“…A mini Baited Remote Underwater Video (BRUV) (hereafter referred to as a ‘mini‐BRUV’) system was used to survey for the presence/abundance of E. daemelii within intertidal habitats as well as for the presence of other fish species within the site. The use of BRUV is an established method for studying fish assemblages (Malcolm et al., ; Ebner and Morgan, ); however, the generally large size of the standard BRUV is impractical for use in intertidal habitats. Utilising small high definition GoPro HERO2 underwater video cameras (http://www.gopro.com), a compact mini‐BRUV system was developed that incorporated a 30 cm bait arm with 2 × 2 kg weights to weight the system along with a small mesh bait bag (Fig.…”

Section: Methodsmentioning

confidence: 99%

Where are the little ones: distribution and abundance of the threatened serranid Epinephelus daemelii (Günther, 1876) in intertidal habitats in New South Wales, Australia

et al. 2014

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SummaryA survey of intertidal habitats, including coastal rock pools, was undertaken across New South Wales (NSW), Australia, February to May 2012, to test the hypothesis that the distribution and abundance of threatened juvenile black cod Epinephelus daemelii (G€ unther, 1876) does not differ across marine bioregions. An assessment was also provided on their habitat use and site fidelity. Various methods were trialled to determine the best method for detecting juvenile E. daemelii, with the most suitable method being the deployment of small baited underwater high definition video cameras for a period of 30 min. Using these baited video cameras, sampling occurred across four bioregions in NSW, covering approximately 800 km of coastline. Within each bioregion, a minimum of nine locations was selected, and at each location a minimum of six intertidal habitats was surveyed for the presence of E. daemelii. Of 412 sites surveyed, a total of 20 juveniles (mean size = 16.7 cm AE 1.1 cm SE) were found in intertidal habitats along approx. 420 km of coastline. The smallest juvenile was L T 3 cm and the largest fish was stereo measured at L T 26.5 cm. E. daemelii were found to tolerate a large range of water quality parameters, particularly temperature (mean 21.7°C AE 0.7 SE, min = 16.8°C and max = 31.2°C) and dissolved oxygen (mean 11.2 mg L À1 AE 1.3 SE, min = 5.7 mg L À1 and max = 19.2 mg L À1). E. daemelii were found in habitats dominated by boulders and overhangs, indicating a preference for structural features that provide solid cover. No E. daemelii were recorded at sites that had algae as the dominant habitat type. Juvenile E. daemelii were found to display site fidelity to rock pool habitats, with two individuals recorded as remaining at their same sites for a period of 471 days, even though the rock pools were open to the ocean at high tides. This study indicates that the abundance of juvenile E. daemelii is low, especially north of Port Stephens where adults are most abundant. Use of the small baited video cameras proved to be a successful sampling method to confirm that juvenile E. daemelii utilise rock pool and shallow reef intertidal habitats in the early stages of their life cycle.

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“…Comparisons with established sampling techniques demonstrate that underwater videography provides similar or sometimes higher detection rates provided that visibility in the water is sufficient (Ellender et al. ; Ebner and Morgan ; Ebner et al. ; Branigan et al.…”

mentioning

confidence: 99%

Use of Underwater Videography to Quantify Conditions Utilized by Endangered Moapa Dace While Spawning

Ruggirello

Bonar

Feuerbacher

et al. 2020

N American J Fish Manag

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Advances in underwater camera technology provide an affordable means to quantify the environmental conditions under which fish spawn. This information is important for investigating spawning ecology, managing habitat, or providing information for captive breeding programs. We deployed 12 modified security cameras underwater to identify environmental conditions related to the spawning behavior of the critically endangered Moapa Dace Moapa coriacea, a Mojave Desert stream‐dwelling cyprinid that had never been observed spawning and that had fallen to a low of 459 individual fish 4 years prior to this study. Camera sites were selected systematically along the stream to represent the variety of conditions available. We divided the field of view in front of each camera into a grid, and we estimated both the available environment and the habitat over which Moapa Dace showed spawning behavior. From over 4,000 10‐min video clips that were randomly selected for analysis, 13 spawning events were identified. Using nonparametric contingency table analyses, we found that Moapa Dace selected depths between 30 and 34 cm, water velocities between 0.11 and 0.17 m/s, cobble substrate, and overhead instream cover. Although the recorded sample size of spawning events was small (13), our sample represents a large proportion of events given that the world's entire population of Moapa Dace at the time was approximately 650 fish distributed over multiple kilometers of stream length. Environmental conditions identified by this study were replicated in laboratory facilities to successfully propagate Moapa Dace for the first time in captivity. These propagation methods are now used in a management setting by the Nevada Department of Wildlife to maintain a captive population of this rare fish. Camera methods can be effective in helping to identify spawning conditions where water clarity is sufficient.

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Using remote underwater video to estimate freshwater fish species richness

Cited by 54 publications

References 44 publications

Use of underwater video to assess freshwater fish populations in dense submersed aquatic vegetation

Use of underwater video to assess freshwater fish populations in dense submersed aquatic vegetation

Where are the little ones: distribution and abundance of the threatened serranid Epinephelus daemelii (Günther, 1876) in intertidal habitats in New South Wales, Australia

Use of Underwater Videography to Quantify Conditions Utilized by Endangered Moapa Dace While Spawning

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