Measuring abnormal rotational movements in free-swimming fish with accelerometers: implications for quantifying tag- and parasite-load

Broell, Franziska; Burnell, Celene; Taggart, Christopher T.

doi:10.1242/jeb.133033

Cited by 19 publications

(29 citation statements)

References 62 publications

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“…These results agree with the concerns from previous work showing behavioral changes with instrumentation (van der Hoop et al, 2014a;Broell et al, 2016), and especially with large tags (Wilson et al, 1986;Littnan et al, 2004;McMahon et al, 2008;Berga et al, 2014;Maresh et al, 2014).…”

Section: Tag Effectsupporting

confidence: 92%

“…Fortunately, more and more studies are assessing the impacts of tags across taxa Barron et al, 2010;Jones et al, 2013;van der Hoop et al, 2014a;Broell et al, 2016). These results suggest that computational and experimental methods can be used to determine the increase in drag associated with tags and whether this impact is appropriate over the intended duration of tag attach-ment.…”

Section: Discussionmentioning

confidence: 99%

“…Tags do, however, contribute additional weight and bulk, and more relevant in the marine realm, buoyancy, lift and drag. Few studies directly assess the consequences of adding tags McMahon et al, 2011;McIntyre, 2014), which may impact not only on the tag subject's vital rates (e.g., Barron et al, 2010;Best et al, 2014;van der Hoop et al, 2014b), but also their behavior which is often assumed to be representative of the untagged population (Ropert-Coudert and Wilson, 2004;Vandenabeele et al, 2011;Broell et al, 2016). Quantifying drag forces added by tags is also useful to refine designs and improve the longevity of attachment systems (e.g., Shorter et al, 2013).…”

Section: Tag Dragmentioning

confidence: 99%

“…external tags glued to the animal's surface) should be especially small and hydrodynamically shaped. While this consideration would minimize the energetic impact of tagging, it does not address the issue of recording unnatural behaviors due to tag effects for a tag deployment of any duration (Broell et al, 2016). …”

Section: Tag Size Recommendationsmentioning

confidence: 99%

“…Tags do, however, contribute additional weight and bulk, and more relevant in the marine realm, buoyancy, lift and drag. It is important to know the impact of these devices not only on the tag subject's vital rates (e.g., Barron et al, 2010;Best et al, 2014;van der Hoop et al, 2014a), but also on their behavior which we often assume to be representative of the untagged population (Ropert-Coudert and Wilson, 2004;Vandenabeele et al, 2011;Broell et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Effects of added drag on cetaceans : fishing gear entanglement and external tag attachment

Hoop¹

2017

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Animal movement is motivated in part by energetic constraints, where fitness is maximized by minimizing energy consumption. The energetic cost of movement depends on the resistive forces acting on an animal; changes in this force balance can occur naturally or unnaturally. Fishing gear that entangles large whales adds drag, often altering energy balance to the point of terminal emaciation. An analog to this is drag from tags attached to cetaceans for research and monitoring. This thesis quantifies the effects of drag loading from these two scenarios on fine-scale movements, behaviors and energy consumption.I measured drag forces on fishing gear that entangled endangered North Atlantic right whales and combined these measurements with theoretical estimates of drag on whales' bodies. Entanglement in fishing gear increased drag forces by up to 3 fold. Bio-logging tags deployed on two entangled right whales recorded changes in the diving and fine-scale movement patterns of these whales in response to relative changes in drag and buoyancy from fishing gear and through disentanglement: some swimming patterns were consistently modulated in response. Disentanglement significantly altered dive behavior, and can affect thrust production. Changes in the force balance and swimming behaviors have implications for the survival of chronically entangled whales. I developed two bioenergetics approaches to estimate that chronic, lethal entanglements cost approximately the same amount as the cost of pregnancy and supporting a calf to near-weaning. I then developed a method to estimate drag, energy burden and survival of an entangled whale at detection. This application is essential for disentanglement response and protected species management.Experiments with tagged bottlenose dolphins suggest similar responses to added drag: I determined that instrumented animals slow down to avoid additional energetic costs associated with drag from small bio-logging tags, and incrementally decrease swim speed as drag increases. Metabolic impacts are measurable when speed is constrained. I measured the drag forces on these tags and developed guidelines depending on the relative size of instruments to study-species.Together, these studies quantify the magnitude of added drag in complementary systems, and demonstrate how animals alter their movement to navigate changes in their energy landscape associated with increased drag.

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Section: Tag Effectsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Section: Tag Dragmentioning

confidence: 99%

Section: Tag Size Recommendationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effects of added drag on cetaceans : fishing gear entanglement and external tag attachment

Hoop¹

2017

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Adult Sockeye Salmon Gastrically Tagged Near Spawning Grounds Exhibit Lower Survival Rates throughout the Spawning Period than Externally Tagged Conspecifics

Dick

Patterson

Robinson

et al. 2020

N American J Fish Manag

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Telemetry is a common tool for studying the behavior and fate of migrating adult Pacific salmon Oncorhynchus spp., yet few field studies have compared behavior and fate associated with different tagging techniques. In this study, adult Harrison River (British Columbia) Sockeye Salmon O. nerka were captured in their natal river near spawning areas, radio‐tagged by gastric insertion or external attachment in the dorsum, and released. Tagging occurred on 5 d spread over 3–8 weeks prior to spawning, thus encompassing fish in varying stages of maturity and freshwater residency. Tagged individuals were monitored over the spawning season by using fixed receiver stations and mobile tracking. The probability of fish moving upstream or downstream of the tagging site within 35 h of tagging was a function of tagging date but not tag type. Tag type significantly influenced fate, with almost twice as many externally tagged fish (41.6%; 42 of 101) surviving to reach spawning areas compared to gastrically tagged fish (22.4%; 21 of 94). The number of active externally tagged fish in the Harrison River system was consistently greater than the number of active gastrically tagged fish that received tags on the same date for four of the five tagging dates. External tag attachment may be a better approach than gastric insertion for studies that tag adult salmon near or on spawning areas.

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Detecting changes in fish behaviour in real time to alert managers to thresholds of potential concern

Burnett,

Süßle,

Saayman

et al. 2023

River Research & Apps

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Fish behaviour is one biological organisational level regularly used to assess the state of freshwater ecosystems and can be monitored using fish telemetry methods. The development of activity sensors incorporated into fish telemetered tags allows for non‐spatial movement to be detected and is increasingly used to understand the energy budgets and response and fine‐scale behaviour of fishes. In addition, detecting tagged fish remotely and in real time highlights the need to process fish activity data in near real time to make it relevant to managers in the water resource sector. Our study on Labeobarbus natalensis, a cyprinid, in the uMngeni River in KwaZulu‐Natal, South Africa, adapted and then tested the exponentially weighted moving average (EWMA), as developed for financial predictive modelling, using activity data from fish. To determine changes in behaviour, we compared the EWMA‐predicted fish behaviour against the present fish behaviour. We showed that the EWMA could adequately detect changes in behaviour on both individual and population levels. Changes in behaviour are potentially indicative of a change in environmental conditions and thus were developed into management alerts. We conducted further analyses using generalised additive mixed models (GAMM) to determine the relationship between fish activity and the environmental data collected. The GAMMs helped determine the potential drivers for changes in behaviour where the EWMA could detect these in real time. Detecting changes in behaviour in real time as a result of environmental variables can identify thresholds of potential concern influencing management decisions and allow managers to respond, contributing to improving effective freshwater management.

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Measuring abnormal rotational movements in free-swimming fish with accelerometers: implications for quantifying tag- and parasite-load

Cited by 19 publications

References 62 publications

Effects of added drag on cetaceans : fishing gear entanglement and external tag attachment

Effects of added drag on cetaceans : fishing gear entanglement and external tag attachment

Adult Sockeye Salmon Gastrically Tagged Near Spawning Grounds Exhibit Lower Survival Rates throughout the Spawning Period than Externally Tagged Conspecifics

Detecting changes in fish behaviour in real time to alert managers to thresholds of potential concern

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