Does bait type and bait container configuration influence the performance of remote underwater video systems in temperate freshwater lakes for assessing fish community structure?

Glassman, Daniel M.; Chhor, Auston D.; Vermaire, Jesse C.; Bennett, Joseph; Cooke, Steven J.

doi:10.1007/s10750-021-04776-7

Cited by 3 publications

(5 citation statements)

References 38 publications

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“…Opinicon Lake has an abundance of fish, and as such, the recordings commonly contained images of fish. However, such data are also inherently variable (e.g., Glassman et al, 2022) with sampling instances in which no fish were observed. The statistical analysis revealed some variation in fish presence and diversity between recordings at different sites but none that was clearly linked to device operation and EMF transmission.…”

Section: Discussionmentioning

confidence: 99%

“…The units were then tethered to cinder block anchors and yellow marker buoys with nylon nautical rope and deployed for 1‐h observation periods at different points (1‐ to 3‐m depth) separated by at least 300 m around the shores of Opinicon Lake. From the videos, we extracted still frames at 30‐s intervals, counted the number of fish visible in those frames, and identified them to at least the Family level or genus or species whenever possible (as per Glassman et al, 2022) to determine if the EMFs influenced space use by wild, free‐swimming fishes in their natural habitat. We recorded a total of N = 51 videos consisting of N = 25 treatment (EMF device activated) and N = 26 control (EMF device off) trials conducted at midday to maximize light availability and underwater viewing range.…”

Section: Methodsmentioning

confidence: 99%

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No evidence for collateral effects of electromagnetic fields used to increase dissolved oxygen levels on the behavior and physiology of freshwater fishes

Elvidge

Bihun

Davis

et al. 2022

Water Environment Research

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Hypoxia in surface waters driven by warming climate and other anthropogenic stressors is a major conservation concern, and technological solutions for water quality remediation are sorely needed. One potential solution involves the use of low‐intensity electromagnetic fields (EMFs) to increase dissolved oxygen levels, but potential collateral effects of the EMFs on aquatic animals have not been formally evaluated. We examined the effects of EMF exposure on wild‐caught, captive sunfish (Lepomis spp.) over 8‐day and 3‐day exposures, with and without aeration in mesocosms and stock tanks (respectively). We also quantified ambient fish abundance in close proximity to EMF devices deployed in Opinicon Lake (ON). We found no significant differences in a suite of blood‐based stress physiology biomarkers, behaviors, and putative aerobic capacities between EMF and control conditions over 8 days. Aerated mesocosms equipped with activated EMFs consistently had higher oxygen levels in the water than aerated controls. There were no differences in mortality during 3‐day oxygen depletion trials under EMF or control conditions, and we detected no differences in fish abundance when the devices were activated in the lake. Our findings suggest that deploying EMF devices in field settings is not likely to exert negative effects on exposed fish populations. Practitioner Points Low‐cost, low‐energy technological solutions to remediate aquatic hypoxia are sorely needed Electromagnetic fields (EMFs) can increase oxygen flux across air/water interfaces and increase dissolved oxygen levels We found no evidence of negative effects of EMFs on fish physiology or behavior and our results support their use in alleviating hypoxic conditions

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

No evidence for collateral effects of electromagnetic fields used to increase dissolved oxygen levels on the behavior and physiology of freshwater fishes

Elvidge

Bihun

Davis

et al. 2022

Water Environment Research

Self Cite

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“…Glassman et al compared the effectiveness of three types of bait and two types of bait containers on bait free systems. The results indicate that BRUVS is effective in observing species richness in shallow and low visibility freshwater environments, but there is almost no evidence to suggest that the use of bait improves the effectiveness compared to non-bait RUVS [7]. Zhang et al proposed an end-to-end dual generator model DuGAN on the grounds of generative adversarial networks for enhancing underwater images.…”

Section: Related Workmentioning

confidence: 99%

“…It performs power operations on the channel equations to obtain a moderate compensation space, as shown in Eq. (7).…”

Section: B Improvement Of Underwater Video Image Restoration On the G...mentioning

confidence: 99%

Underwater Video Image Restoration and Visual Communication Optimization Based on Improved Non Local Prior Algorithm

Xia

2024

IJACSA

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Underwater image processing should balance image clarity restoration and comprehensive display of underwater scenes, requiring image fusion and stitching techniques. The pixel level fusion method is based on pixels, and by fusing different image data, it eliminates stitching gaps and sudden changes in lighting intensity, preserves detailed information, and thus improves the accuracy of stitching images. In the process of restoring underwater video images without local priors, there is still room for optimization in steps such as removing atmospheric light values, estimating transmittance, and calculating dehazing images through regularization. Based on the characteristics of Jerlov water types, water quality is classified according to the properties of suspended solids, and each channel is adjusted to the compensation space to improve the restoration algorithm. Background light estimation is used to determine the degree of image degradation, select the optimal attenuation coefficient ratio, and restore the image. The experimental results show that it is crucial to choose a ratio of attenuation coefficients that is close to the actual water quality environment being photographed. Both this model and traditional algorithms have an accuracy rate of over 99.0%, with the accuracy of this model sometimes reaching 99.9%. Pixel level fusion and background light estimation technology optimize underwater images, improve stitching accuracy and clarity, enhance target detection and recognition, and have important value for marine exploration rigs.

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“…The use of BRUVs in marine environments is common, but less common in freshwater systems (Whitmarsh et al, 2017). BRUVs have been used to assess species richness (Ebner & Morgan, 2013), abundance, condition and size in freshwater fish (Glassman et al, 2022), trap avoidance and behaviour in freshwater crayfish (O'Hea Miller et al, 2023; Skorulis et al, 2021), and abundance of freshwater turtles, caimans and dolphins (Schmid & Giarrizzo, 2019). Whilst BRUVs have been shown to be useful for relative abundance estimates for some freshwater turtle species, there is a need to refine BRUV use (Schmid & Giarrizzo, 2019) and compare effectiveness with active methods used for freshwater turtle monitoring.…”

Section: Introductionmentioning

confidence: 99%

Using baited remote underwater videos to survey freshwater turtles

Coleman,

Wood,

Deeth

et al. 2023

Austral Ecology

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New and innovative techniques utilizing underwater cameras have the potential to track changes in turtle populations whilst being less invasive and time intensive than traditional trapping surveys. In this study, we trialled the use of Baited Remote Underwater Videos (BRUVs) in five upland streams to test if BRUVs could be used for abundance, size and sex estimates of freshwater turtles. We also compared BRUVs to cathedral traps and identified key considerations for future use of this method, such as whether the time of day influenced results. Our study successfully detected 83 turtles from 52 h of footage and identified all species known to occur in the study area. The deployment time did not significantly influence relative abundance. BRUVs also produced statistically similar catch per unit effort estimates to cathedral trapping techniques. No small turtles (i.e. juveniles) were detected, and difficulties with visibility, sex accuracy and carapace measurements are discussed for future BRUV use. Our study shows that BRUVs are a useful, time effective, non‐invasive technique to collect relative abundance and species richness estimates for freshwater turtles.

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Does bait type and bait container configuration influence the performance of remote underwater video systems in temperate freshwater lakes for assessing fish community structure?

Cited by 3 publications

References 38 publications

No evidence for collateral effects of electromagnetic fields used to increase dissolved oxygen levels on the behavior and physiology of freshwater fishes

No evidence for collateral effects of electromagnetic fields used to increase dissolved oxygen levels on the behavior and physiology of freshwater fishes

Underwater Video Image Restoration and Visual Communication Optimization Based on Improved Non Local Prior Algorithm

Using baited remote underwater videos to survey freshwater turtles

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