A summary of the use of electronic tagging to provide insights into salmon migration and survival

Klimley, A. Peter; MacFarlane, R. Bruce; Sandstrom, Phillip T.; Lindley, Steven T.

doi:10.1007/s10641-012-0098-y

Cited by 13 publications

(8 citation statements)

References 34 publications

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“…Passive acoustic telemetry offers a powerful tool for the study of habitat use and for the long-term monitoring of fish movement (Heupel and Webber 2011;Hussey et al 2015). Studies tracking the marine migrations of adult salmonids, however, remain rare (e.g., Drenner et al 2012;Klimley et al 2013), and this is particularly true in the Arctic.…”

Section: Introductionmentioning

confidence: 99%

Preference for nearshore and estuarine habitats in anadromous Arctic char (Salvelinus alpinus) from the Canadian high Arctic (Victoria Island, Nunavut) revealed by acoustic telemetry

Moore

Harris

Kessel

et al. 2016

Can. J. Fish. Aquat. Sci.

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Abstract:We used an array of fixed acoustic receivers (N = 42) to track the summer marine movements of 121 anadromous Arctic char (Salvelinus alpinus) equipped with acoustic transmitters at three locations in the Cambridge Bay region, where commercial and subsistence fisheries target the species. The timing of transitions between salt and fresh water was influenced by the putative river of origin of tagged individuals, but not by their size or sex. Females, however, were more likely to remain proximate to rivers where they were tagged throughout the summer. A majority of fish migrated west from their rivers of origin, primarily moving between estuarine environments. Individuals occupied estuaries for several days between bouts of marine movement, and these periods of residency coincided with spring tides in some estuaries. We also recorded increased numbers of detections on receivers located less than 1.5 km from the coast, indicating a preference for nearshore habitats. Finally, we report evidence of extensive stock mixing throughout the summer, including at known fishing locations and periods, a finding with implications for fisheries management.Résumé : Les mouvements estivaux en milieu marin de 121 ombles chevaliers (Salvelinus alpinus) anadromes équipées de transmetteur metteur acoustique issus de trois sites de marquages ont été suivis grâce à un réseau de récepteurs acoustiques (N = 42) ancrés dans la région de Cambridge Bay. Les périodes de transition entre les eaux douces et salées étaient influencées par la rivière d'origine des individus, mais pas par leur taille ou leur sexe. Cependant une proportion plus grande de femelles restait près de leur rivière de capture pour tout l'été. Une majorité d'individus ont migré vers l'ouest se déplaçant d'estuaire en estuaire. Ces périodes de résidence en estuaires duraient souvent plusieurs jours, et coïncidaient avec les marées de vives-eaux dans certains estuaires. Dans toute la zone d'étude, les récepteurs situés à moins de 1,5 km de la côte ont enregistré un plus grand nombre de détections, indiquant une préférence pour les habitats côtiers. Finalement, nos données révèlent un mélange des stocks durant la période estivale, notamment dans des zones et périodes de pêches, un résultat ayant d'importantes répercus-sions pour la gestion des pêches.

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Section: Introductionmentioning

confidence: 99%

Preference for nearshore and estuarine habitats in anadromous Arctic char (Salvelinus alpinus) from the Canadian high Arctic (Victoria Island, Nunavut) revealed by acoustic telemetry

Moore

Harris

Kessel

et al. 2016

Can. J. Fish. Aquat. Sci.

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“…This technology has been applied to a wide range of species and environments: diadromous fishes (Solomon & Potter ; Klimley et al . ), reef fishes (Meyer, Papastamatiou & Clark ), deep water fishes (Weng ), sharks (Yeiser, Heupel & Simpfendorfer ), turtles (Seminoff & Jones ) and highly migratory pelagic fishes (Honda et al . ).…”

Section: Introductionmentioning

confidence: 99%

“…Within aquatic systems, networks of static sensors that acoustically detect tagged animals are among the only feasible means to gather ecological information. This technology has been applied to a wide range of species and environments: diadromous fishes (Solomon & Potter 1988;Klimley et al 2013), reef fishes (Meyer, Papastamatiou & Clark 2010), deep water fishes (Weng 2013), sharks (Yeiser, Heupel & Simpfendorfer 2008), turtles (Seminoff & Jones 2006) and highly migratory pelagic fishes (Honda et al 2010). Generally, the use of static sensor networks is growing rapidly within ecology (Kessel et al 2013;Marques et al 2013) primarily as a means to monitor animals in environments where continuous human observation is difficult.…”

Section: Introductionmentioning

confidence: 99%

A quantitative approach to static sensor network design

2014

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Summary1. Static sensor networks to observe animals are widely used in ecological, management and conservation research, but quantitative methods for designing these networks are underdeveloped. 2. In the context of aquatic systems, we present a method for quasi-optimal network design, which accounts for blocking of detections by obstacles, horizontal and vertical movement behaviour of the target animals, and type of research question (is the network intended for estimation of detailed movement or home range?). Optimal design is defined as the sensor configuration that maximizes the expected number of unique animal detections. As finding the global optimum is generally time consuming, we use a greedy algorithm instead, which places sensors optimally relative to already placed sensors. The design method requires access to topographic data of the study site and knowledge of the sensor detection range. 3. We illustrate the method with real topographic data from a rugose coral reef where network performance is highly influenced by detection shadowing. Network performance is visualized by a coverage map indicating the probability of detection at any location in the study area. The reported unique recovery rate summarizes the expected ability of the network to collect data given the design constraints. Because sensors are placed sequentially, the information gain per sensor can be evaluated and used as a proxy for sensor value. 4. The presented method formalizes important considerations, when designing sensor networks, that were previously often based on heuristics and intuition. The method provides a guide to maximizing the information potential of future monitoring studies as well as a means to improve existing networks. The method is available as an R package and can be tested via an online web tool.

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“…In this paper, we discuss considerations in designing and implementing a predator lter. Our context is the common case of studying survival of juvenile migratory shes in a regulated river using implanted microacoustic tags (McMichael et al 2010; Klimley et al 2013;Crossin et al 2017). In studies of this type, tagged sh released at one end of the study area migrate past a series of interrogation arrays, and their migration survival is characterized using a Cormack-Jolly-Seber (CJS) survival model (Burnham et al 1987;Skalski et al 1998).…”

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confidence: 99%

Diagnosing Predated Tags in Telemetry Survival Studies of Migratory Fishes in River Systems

Buchanan

Whitlock

2021

Preprint

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Acoustic telemetry is a powerful tool for studying fish behavior and survival that relies on the assumption that tag detection reflects the presence of live study subjects. This assumption is violated in cases where tag signals continue to be recorded after predators have consumed tagged study subjects. When such tag predation is possible, it becomes necessary for researchers to diagnose and remove these nonrepresentative detections. Past studies have employed a variety of data filtering techniques to address the issue, ranging from rule-based algorithms that rely on expert judgements of behavior and movement capabilities of study subjects and their predators to automated pattern-recognition techniques using multivariate analyses. We compare four approaches for flagging suspicious tracks or detection events: two rule-based expert-opinion approaches of differing complexity and two unsupervised pattern recognition approaches with and without data from deliberately tagged predators. We compare and illustrate trade-offs between alternative approaches by applying these filtering techniques to a case study on survival estimation of acoustic-tagged juvenile Chinook salmon (Oncorhynchus tshawytscha) in the San Joaquin River, California, United States. Filtering approaches differed in the number and composition of tags suspected of being consumed by predators; the largest differences occurred between the two broad categories, rule-based versus pattern recognition. Despite the appeal of the pattern recognition procedures’ automated nature, those approaches nevertheless required investigator judgement in interpreting results. All methods flagged a small subset (5%) of suspicious tags that had exceptionally long residence times and evidence of upstream transitions; 27% of tags showed evidence of predation based on at least one filter. The complex rule-based filter deemed the most tags suspicious (21%) and the simpler pattern recognition method the fewest (10%). Reach-specific survival estimates from the four filters were mostly within 2% of the unfiltered estimates but differences up to 11% were observed. Sensitivity of survival results to tag predation and predator filtering depends on the study setting, spatiotemporal scale of inference, and habitat use of predators. We recommend that survival studies include clear documentation of filtering methods and report on robustness of results to the filtering approach selected.

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A summary of the use of electronic tagging to provide insights into salmon migration and survival

Cited by 13 publications

References 34 publications

Preference for nearshore and estuarine habitats in anadromous Arctic char (Salvelinus alpinus) from the Canadian high Arctic (Victoria Island, Nunavut) revealed by acoustic telemetry

Preference for nearshore and estuarine habitats in anadromous Arctic char (Salvelinus alpinus) from the Canadian high Arctic (Victoria Island, Nunavut) revealed by acoustic telemetry

A quantitative approach to static sensor network design

Diagnosing Predated Tags in Telemetry Survival Studies of Migratory Fishes in River Systems

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