Monitoring boat-based recreational fishing effort at a nearshore artificial reef with a shore-based camera

Keller, Krystle; Steffe, Aldo S.; Lowry, Michael B.; Murphy, Jeffrey J.; Suthers, Iain M.

doi:10.1016/j.fishres.2016.03.025

Cited by 43 publications

(28 citation statements)

References 17 publications

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“…; Keller et al. ), our study demonstrates the importance of validating camera‐derived data with data obtained from creel surveys. While our fishing boat definition did result in an overestimation of fishing boats from camera images in some cases (Figure ), validation by using the traditional creel survey allowed for a simple correction.…”

Section: Discussionsupporting

confidence: 53%

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Evaluating the Efficacy of Using Time‐Lapse Cameras to Assess Angling Use: An Example from a High‐Use Metropolitan Reservoir in Arizona

Stahr

Knudsen

2018

N American J Fish Manag

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Creel surveys are the most common angler use survey used by fisheries managers but can be time intensive and expensive to conduct. Time‐lapse cameras have been evaluated as a cost‐efficient alternative to creel surveys on small lakes, streams, and nearshore marine systems but have yet to be evaluated on a reservoir. The objectives of this study were to evaluate the feasibility of using time‐lapse cameras to assess angling use on a high‐use reservoir and provide methodology for use by fisheries managers. One time‐lapse trail camera was installed at a heavily used boat ramp at Lake Pleasant, a large reservoir located near Phoenix, Arizona, from December 2015 to May 2016. A single observer counted fishing and recreational boats and tracked individual fishing boat trips using a randomized schedule. Camera data were first validated against creel counts conducted in person, and subsequent corrected counts were used to estimate both angling and boating use for the study period. Camera counts were easily corrected using the validation approach and were more cost effective than traditional creel survey methods. Overall, we found that time‐lapse cameras can efficiently and accurately collect angler use data on a high‐use reservoir and thus provide a useful alternative to stand‐alone creel surveys. Creel surveys are the most common angler use survey used by fisheries managers but can be time intensive and expensive to conduct. Time‐lapse cameras have been evaluated as a cost‐efficient alternative to creel surveys on small lakes, streams, and nearshore marine systems but have yet to be evaluated on a reservoir. The objectives of this study were to evaluate the feasibility of using time‐lapse cameras to assess angling use on a high‐use reservoir and provide methodology for use by fisheries managers. One time‐lapse trail camera was installed at a heavily used boat ramp at Lake Pleasant, a large reservoir located near Phoenix, Arizona, from December 2015 to May 2016. A single observer counted fishing and recreational boats and tracked individual fishing boat trips using a randomized schedule. Camera data were first validated against creel counts conducted in person, and subsequent corrected counts were used to estimate both angling and boating use for the study period. Camera counts were easily corrected using the validation approach and were more cost effective than traditional creel survey methods. Overall, we found that time‐lapse cameras can efficiently and accurately collect angler use data on a high‐use reservoir and thus provide a useful alternative to stand‐alone creel surveys.

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Section: Discussionsupporting

confidence: 53%

“…; Hining and Rash ; Keller et al. ). Each week was analyzed separately to track temporal trends, with one weekday and one weekend day each week analyzed for the study period (20 total weeks × 2 d analyzed per week = 40 complete days analyzed).…”

Section: Methodsmentioning

confidence: 99%

Evaluating the Efficacy of Using Time‐Lapse Cameras to Assess Angling Use: An Example from a High‐Use Metropolitan Reservoir in Arizona

Stahr

Knudsen

2018

N American J Fish Manag

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“…Traditional onsite and offsite survey methods (Pollock et al, 1994;Hartill et al, 2012;Jones and Pollock, 2012) tend to be labour intensive and expensive, but emerging technologies such as video, time lapse, or motion sensor cameras (Smallwood et al, 2012;Van Poorten et al, 2015;Keller et al, 2016) and pneumatic or magnetic induction road sensors (Steffe et al, 2008) offer an efficient means of continuously monitoring relative trends in effort. Camera based technologies can also be used to determine the spatial distribution of effort (Parnell et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

“…Smallwood et al (2012) addressed both of these issues by combining web camera monitoring of shore based fishers passing through choke points at the base of a groin, with interview data collected during part of the night, to profile and estimate the catch and effort occurring at these groins throughout the day. Keller et al (2016) used a shore based camera to monitor fishing effort occurring around and artificial reef that was 1.5 km offshore, but found some evidence of effort underestimation on low effort days, which may have been weather related. The field of view and visible range of a camera system is therefore an important consideration.…”

Section: G Modelmentioning

confidence: 99%

Bridging the temporal gap: Continuous and cost-effective monitoring of dynamic recreational fisheries by web cameras and creel surveys

et al. 2016

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“…Previous work (Keller et al. ;.) suggested that webcam‐based counts underestimated actual counts compared with binocular counts.…”

Section: Methodsmentioning

confidence: 94%

High‐resolution photo‐mosaic time‐series imagery for monitoring human use of an artificial reef

Wood

Lynch

Devine

et al. 2016

Ecology and Evolution

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Successful marine management relies on understanding patterns of human use. However, obtaining data can be difficult and expensive given the widespread and variable nature of activities conducted. Remote camera systems are increasingly used to overcome cost limitations of conventional labour‐intensive methods. Still, most systems face trade‐offs between the spatial extent and resolution over which data are obtained, limiting their application. We trialed a novel methodology, CSIRO Ruggedized Autonomous Gigapixel System (CRAGS), for time series of high‐resolution photo‐mosaic (HRPM) imagery to estimate fine‐scale metrics of human activity at an artificial reef located 1.3 km from shore. We compared estimates obtained using the novel system to those produced with a web camera that concurrently monitored the site. We evaluated the effect of day type (weekday/weekend) and time of day on each of the systems and compared to estimates obtained from binocular observations. In general, both systems delivered similar estimates for the number of boats observed and to those obtained by binocular counts; these results were also unaffected by the type of day (weekend vs. weekday). CRAGS was able to determine additional information about the user type and party size that was not possible with the lower resolution webcam system. However, there was an effect of time of day as CRAGS suffered from poor image quality in early morning conditions as a result of fixed camera settings. Our field study provides proof of concept of use of this new cost‐effective monitoring tool for the remote collection of high‐resolution large‐extent data on patterns of human use at high temporal frequency.

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Monitoring boat-based recreational fishing effort at a nearshore artificial reef with a shore-based camera

Cited by 43 publications

References 17 publications

Evaluating the Efficacy of Using Time‐Lapse Cameras to Assess Angling Use: An Example from a High‐Use Metropolitan Reservoir in Arizona

Evaluating the Efficacy of Using Time‐Lapse Cameras to Assess Angling Use: An Example from a High‐Use Metropolitan Reservoir in Arizona

Bridging the temporal gap: Continuous and cost-effective monitoring of dynamic recreational fisheries by web cameras and creel surveys

High‐resolution photo‐mosaic time‐series imagery for monitoring human use of an artificial reef

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