Intercalibration of hydroacoustic and mark–recapture methods for assessing the spawning population size of a threatened fish species

Rakowitz, Georg; Kubečka, Jan; Fesl, Christian; Keckeis, Hubert

doi:10.1111/j.1095-8649.2009.02368.x

Cited by 7 publications

(6 citation statements)

References 52 publications

(49 reference statements)

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“…The winter use of sheltered areas (e.g. deep water areas, pools, side channnels) has been observed for cyprinids (Heermann and Borderding 2006;Irmler et al 2008;Rakowitz et al 2009), salmonids (Cunjak and Power 1986;Swales et al 1986) and a variety of other species (e.g. Esox lucius Kobler et al 2008b).…”

Section: Toleration Survival Strategiesmentioning

confidence: 99%

The role of winter phenology in shaping the ecology of freshwater fish and their sensitivities to climate change

et al. 2012

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Thermal preference and performance provide the physiological frame within which fish species seek strategies to cope with the challenges raised by the low temperatures and low levels of oxygen and food that characterize winter. There are two common coping strategies: active utilization of winter conditions or simple toleration of winter conditions. The former is typical of winter specialist species with low preferred temperatures, and the latter is typical of species with higher preferred temperatures. Reproductive strategies are embodied in the phenology of spawning: the approach of winter conditions cues reproductive activity in many coldwater fish species, while the departure of winter conditions cues reproduction in many cool and warmwater fish species. This cuing system promotes temporal partitioning of the food resources available to young-of-year fish and thus supports high diversity in freshwater fish communities. If the zoogeographic distribution of a species covers a broad range of winter conditions, local populations may exhibit differences in their winter survival strategies that reflect adaptation to local conditions. Extreme winter specialists are found in shallow eutrophic lakes where long periods of ice cover cause winter oxygen levels to drop to levels that are lethal to many fish. The fish communities of these lakes are simple and composed of species that exhibit specialized adaptations for extended tolerance of very low temperatures and oxygen levels. Zoogeographic boundaries for some species may be positioned at points on the landscape where the severity of winter overwhelms the species' repertoire of winter survival strategies. Freshwater fish communities are vulnerable to many of the shifts in environmental conditions expected with climate change. Temperate and northern communities are particularly vulnerable since the repertoires of physiological and behavioural strategies that characterize many of their members have been shaped by the adverse environmental conditions (e.g. cool short summers, long cold winters) that climate change is expected to mitigate. The responses of these strategies to the rapid relaxation of the adversities that shaped them will play a significant role in the overall responses of these fish populations and their communities to climate change.

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Section: Toleration Survival Strategiesmentioning

confidence: 99%

The role of winter phenology in shaping the ecology of freshwater fish and their sensitivities to climate change

et al. 2012

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“…They have been used to mark a variety of fish species for monitoring population characteristics such as growth, mortality, abundance, and movement (e.g., Quinn and Peterson 1996;Hutchings and Gerber 2002;DeHaan et al 2007;Al-Chokhachy and Budy 2008). When PIT tags are used to study fish population characteristics, the retention rates are assumed to be high but often are not estimated (e.g., Marsh et al 2005;Rakowitz et al 2009;Zelasko et al 2010).…”

mentioning

confidence: 99%

Retention of Passive Integrated Transponder Tags in Stream‐Dwelling Rainbow Trout

Meyer

High

Gastelecutto

et al. 2011

N American J Fish Manag

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Passive integrated transponder (PIT) tags have been widely used as a tool for various monitoring and research needs, but the retention of PIT tags has rarely been tested in resident salmonids. We quantified the short‐term (≤1 week), annual (1 year), and long‐term (≥1 year) retention rates of PIT tags placed in the peritoneal cavity of small resident rainbow trout Oncorhynchus mykiss in 11 study streams and assessed whether fish size and gender affected tag retention. Short‐term retention rates were at least 92% and averaged 96% for all streams, but a paired t‐test nevertheless indicated that experienced taggers had significantly higher short‐term retention rates (mean, 98%) than did inexperienced taggers (mean, 95%). Annual retention rates for PIT tags averaged 81% among all study streams, ranging from a low of 67% to a high of 92%. Annual retention rates were lower for larger rainbow trout than for their smaller counterparts. Long‐term tag loss for females was the same as for males for fish smaller than 15 cm but significantly higher for fish 15 cm or more, suggesting that egg expulsion was the primary cause of tag loss. Received August 27, 2010; accepted January 3, 2011

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“…Antenna arrays detected ~1.7-3.2× (humpback chub), ~10-12× (flannelmouth sucker) and 1.2-2× (bluehead sucker) more individuals than were physically captured (Figure 4). Other studies have also reported improved inference with array detections or hydroacoustics compared to physical captures (Dudgeon et al, 2015;Dzul et al, 2022;Fraser et al, 2017;Rakowitz et al, 2009), demonstrating how in situ detection methods can greatly improve detection probabilities.…”

Section: Discussionmentioning

confidence: 94%

Estimating migration timing and abundance in partial migratory systems by integrating continuous antenna detections with physical captures

Dzul,

Kendall,

Yackulic

et al. 2024

Journal of Animal Ecology

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Many populations migrate between two different habitats (e.g. wintering/foraging to breeding area, mainstem–tributary, river–lake, river–ocean, river–side channel) as part of their life history. Detection technologies, such as passive integrated transponder (PIT) antennas or sonic receivers, can be placed at boundaries between habitats (e.g. near the confluence of rivers) to detect migratory movements of marked animals. Often, these detection systems have high detection probabilities and detect many individuals but are limited in their ability to make inferences about abundance because only marked individuals can be detected. Here, we introduce a mark–recapture modelling approach that uses detections from a double‐array PIT antenna system to imply movement directionality from arrays and estimate migration timing. Additionally, when combined with physical captures, the model can be used to estimate abundances for both migratory and non‐migratory groups and help quantify partial migration. We first test our approach using simulation, and results indicate our approach displayed negligible bias for total abundance (less than ±1%) and slight biases for state‐specific abundance estimates (±1%–6%). We fit our model to array detections and physical captures of three native fishes (humpback chub [Gila cypha], flannelmouth sucker [Catostomus latipinnis] and bluehead sucker [Catostomus discobolus]) in the Little Colorado River (LCR) in Grand Canyon, AZ, a system that exhibits partial migration (i.e. includes residents and migrants). Abundance estimates from our model confirm that, for all three species, migratory individuals are much more numerous than residents. There was little difference in movement timing between 2021 (a year without preceding winter/spring floods) and 2022 (a year with a small flood occurring in early April). In both years, flannelmouth sucker arrived in mid‐March whereas humpback chub and bluehead sucker arrivals occurred early‐ to mid‐April. With humpback chub and flannelmouth sucker, movement timing was influenced by body size so that large individuals were more likely to arrive early compared to smaller individuals. With more years of data, this model framework could be used to evaluate ecological questions pertaining to flow cues and movement timing or intensity, relative trends in migrants versus residents and ecological drivers of skipped spawning.

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Intercalibration of hydroacoustic and mark–recapture methods for assessing the spawning population size of a threatened fish species

Cited by 7 publications

References 52 publications

The role of winter phenology in shaping the ecology of freshwater fish and their sensitivities to climate change

The role of winter phenology in shaping the ecology of freshwater fish and their sensitivities to climate change

Retention of Passive Integrated Transponder Tags in Stream‐Dwelling Rainbow Trout

Estimating migration timing and abundance in partial migratory systems by integrating continuous antenna detections with physical captures

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