Tracking bowfin with acoustic telemetry: Insight into the ecology of a living fossil

Midwood, Jonathan D.; Gutowsky, Lee F.G.; Hlevca, Bogdan; Portiss, Rick; Wells, Mathew G.; Doka, Susan E.; Cooke, Steven J.

doi:10.1111/eff.12340

Cited by 17 publications

(9 citation statements)

References 28 publications

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“…Their sister infraclass in the subclass Neopterygii, the Holosteii, pose a unique challenge, and while intracoelomic implantation has been successfully applied to fish in the order Amia (Traslavina ; Midwood et al. ), to our knowledge no species in the gar family have been internally tagged. This is likely due to the challenges associated with breaching the ganoid scales of gars.…”

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confidence: 99%

Intracoelomic Implantation of Transmitters in Longnose Gar

et al. 2018

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Fish in the family Lepisosteidae (hereafter, gars) have unique ganoid scales that pose inherent challenges to implanting electronic tags in their coeloms for telemetry studies. In this paper we outline a unique approach to conducting laparotomic surgery in gars, with a focus on the Longnose Gar Lepisosteus osseus. An electric rotary tool with a circular cutting blade was used to cut through the scales, and the same tool, with a drill bit, was used to create holes through which to run the suture material. The final incision into the body cavity was made with a scalpel, and the incision was expanded using surgical scissors. Using a passive acoustic telemetry array, the survival of 12 of 15 tagged Longnose Gars was confirmed over a 123‐d period based on their detection at receivers outside of their areas of capture and release. Two individuals were recaptured 17–19 weeks postsurgery and showed complete healing of the wounds with limited evidence of scarring. This approach will allow for the long‐term tagging and tracking of gars to help elucidate their ecology.

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confidence: 99%

Intracoelomic Implantation of Transmitters in Longnose Gar

et al. 2018

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“…The importance of shallow and high SAV cover habitats, both combined and independently, are likely underrepresented in these outputs. Indeed, Midwood et al ( 2018 , 2019 ) surmised based on movement patterns that species such as largemouth bass and bowfin are unlikely to be exiting the Harbour and instead had evaded detection in shallow areas with dense vegetation coverage. To generate robust estimates of habitat use/selection, there must be extensive coverage across a wide range of each ecological variable being considered.…”

Section: Discussionmentioning

confidence: 99%

“…Notably, due to data availability, a single measure of SAV cover in the summer at each receiver (Midwood et al, 2019 ) was used in the model, so any positive or negative associations in other seasons may not be related to the presence of live SAV at the time, but rather other characteristics of these habitats (e.g., mud substrate, biodegrading vegetation) or the conditions that can support SAV (e.g., shallow depths, soft substrate, low exposure; Midwood et al, 2021b ). Similar to largemouth bass, bowfin also associated with high SAV densities in sheltered embayments in the spring and summer, but conversely, transitioned to deeper water in the fall and were seldom detected in winter, either indicating occupation of shallow and/or deep areas with no receiver coverage (Midwood et al, 2018 ). However, shallow, high SAV areas are important components of bowfin habitat, including for spring spawning and summer rearing and foraging, so a reasonable assumption would be staging in shallows (Cudmore-Vokey & Minns, 2002 ).…”

Section: Discussionmentioning

confidence: 99%

Telemetry-based spatial–temporal fish habitat models for fishes in an urban freshwater harbour

et al. 2023

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Fish habitat associations are important measures for effective aquatic habitat management, but often vary over broad spatial and temporal scales, and are therefore challenging to measure comprehensively. We used a 9-year acoustic telemetry dataset to generate spatial–temporal habitat suitability models for seven fish species in an urban freshwater harbour, Toronto Harbour, Lake Ontario. Fishes generally occupied the more natural regions of Toronto Harbour most frequently. However, each species exhibited unique habitat associations and spatial–temporal interactions in their habitat use. For example, largemouth bass exhibited the most consistent seasonal habitat use, mainly associating with shallow, sheltered embayments with high aquatic vegetation (SAV) cover. Conversely, walleye seldom occupied Toronto Harbour in summer, with the highest occupancy of shallow, low-SAV habitats in the spring, which corresponds to their spawning period. Others, such as common carp, shifted between shallow summer and deeper winter habitats. Community level spatial–temporal habitat importance estimates were also generated, which can serve as an aggregate measure for habitat management. Acoustic telemetry provides novel opportunities to generate robust spatial–temporal fish habitat models based on wild fish behaviour, which are useful for the management of fish habitat from a fish species and community perspective.

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“…Habitat preference was analyzed by fitting a linear-mixedeffect (LME; package lme4) model with modified RI as the response variable (which was log transformed), as described in Midwood et al (2018). Each sample in this analysis represented the modified RI (time spent at a given receiver group, divided the total length of a given season) of an individual fish for each season for 1 year.…”

Section: Seasonal Residency and Habitat Conditionsmentioning

confidence: 99%

Spatial ecology of non-native common carp (Cyprinus carpio) in Lake Ontario with implications for management

et al. 2022

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Common carp, Cyprinus carpio, are a non-native species that established within the Laurentian Great Lakes more than a century ago and are abundant in some locations. Common carp have negatively impacted freshwater ecosystems, including in the Great Lakes, by increasing turbidity and uprooting vegetation through foraging and/or spawning activities. Knowledge of spatial ecology is necessary to effectively manage non-native species and aid in the development of remediation strategies. The aim of this study was to examine the spatial ecology of common carp across multiple spatial scales within Lake Ontario using passive acoustic telemetry. First, Residency Index (RI), as a metric for habitat preference, was calculated for common carp in Toronto Harbour (TH) and Hamilton Harbour (HH). Linear mixed modelling revealed that season, as well as the interaction between season and physical habitat conditions significantly affected RI. Specifically, during spring and summer common carp had significantly higher RI at sites with increased submerged aquatic vegetation, which could be associated with spawning activities. All common carp tagged in HH were resident, compared to half of individuals tagged in TH. Larger individuals tagged in TH were more likely to be absent from the array during summer. Non-resident common carp tagged at TH made extensive movements in spring and summer along the nearshore of Lake Ontario and were detected throughout the entire basin. Knowledge of spawning habitat could inform efforts to exclude common carp from these specific locations. Based on our findings, common carp should be managed at a regional level, as opposed to single sites, owing to their extensive movements.

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Tracking bowfin with acoustic telemetry: Insight into the ecology of a living fossil

Cited by 17 publications

References 28 publications

Intracoelomic Implantation of Transmitters in Longnose Gar

Intracoelomic Implantation of Transmitters in Longnose Gar

Telemetry-based spatial–temporal fish habitat models for fishes in an urban freshwater harbour

Spatial ecology of non-native common carp (Cyprinus carpio) in Lake Ontario with implications for management

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