PIT tag retention and tag induced mortality in juvenile bonytail and Gila chub

Ward, David L.; Childs, Michael R.; Persons, William R.

doi:10.1111/j.1365-2400.2008.00595.x

Cited by 25 publications

(21 citation statements)

References 6 publications

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“…Likewise, PIT‐tagging had minimal impact on swimming performance, similar to what has been reported for bullhead (Knaepkens et al., 2007) and juvenile rainbow trout (Newby et al., 2007). Finally, tag retention was comparable to that found in other experimental studies (Acolas et al., 2007; Ward et al., 2008; Bolland et al., 2009).…”

Section: Discussionsupporting

confidence: 89%

“…Overall, 80 fish, 66–124 mm fork length, were stocked into aerated aquaria (50 × 30 × 25 cm), with gravel bottoms and filtered water. The length range used was that typically encountered in the wild and which appeared acceptable for PIT‐tagging based on results in other small fish (Acolas et al., 2007; Ward et al., 2008). Fish were acclimated to experimental conditions for 7 days.…”

Section: Methodsmentioning

confidence: 99%

“…Recent studies have documented the suitability of PIT‐tagging for small fish (e.g. Skov et al., 2005; Ruetz et al., 2006; Acolas et al., 2007; Knaepkens et al., 2007; Bolland et al., 2009), although evidence for endangered cyprinids remains scarce (but see Ward et al., 2008). This study evaluated the reliability of PIT‐tagging for the Mira chub Squalius torgalensis (Coelho, Bogutskaya, Rodrigues and Collares‐Pereira), a critically endangered cyprinid endemic to the Iberian Peninsula.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of PIT-tagging in an endangered Iberian cyprinid

Pires

Ribeiro

Magalhães

2010

Journal of Applied Ichthyology

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Section: Discussionsupporting

confidence: 89%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evaluation of PIT-tagging in an endangered Iberian cyprinid

Pires

Ribeiro

Magalhães

2010

Journal of Applied Ichthyology

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“…Based on our two-year study, retention of PIT tags in eastern hellbenders is high and consistent with other herpetofauna and aquatic vertebrates (table 1). There are several factors that can increase PIT tag retention including: proper needle placement and orientation, tag implantation location, adequate immobilization of the individual, handler experience, and physiology of taxa (Gibbons and Andrews, 2004;Ward, Childs and Persons, 2008). In this study, proper implantation of tags deep into the tail musculature most likely minimized loss of PIT tags.…”

Section: Molecular Approachmentioning

confidence: 84%

Genetic markers reveal high PIT tag retention rates in giant salamanders (Cryptobranchus alleganiensis)

2012

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Estimation of population size using mark-recapture (MRR) methods are based on the fundamental assumption that individuals retain their marks throughout the course of study. Passive Integrated Transponder (PIT) tags are useful as a cost effective, reliable marking method in many amphibian and reptile species. Few studies however, use secondary methods to evaluate tag retention rates. Failure to do so can lead to biased population estimates, erroneous conclusions, and thus poor management decisions. Surprisingly, estimates of PIT tag retention are currently lacking for the majority of amphibian species, many of which are experiencing population declines. Herein, we use genetic tagging to assess the retention of PIT tags of the eastern hellbender (Cryptobranchus alleganiensis alleganiensis). We captured and tagged 78 individuals across 35 sites. Recapture rate was 24% and genetic tagging revealed 100% tag retention across all recaptured individuals.

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“…>98%) and low tag loss (i.e. 3%), 30 days post abdominal tagging (Childs, 2002;Ward et al, 2008), indicating there is likely minimal tag loss and negligible effects on HBC survival due to tagging. Because PIT tags are inserted into the abdominal cavity, tags are not discernable to visual predators, likely making a tagged fish no more susceptible to predation by such species.…”

Section: Discussionmentioning

confidence: 98%

Evidence for skipped spawning in a potamodromous cyprinid, humpback chub (Gila cypha), with implications for demographic parameter estimates

et al. 2015

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a b s t r a c tOur findings reveal evidence for skipped spawning in a potamodromous cyprinid, humpback chub (HBC; Gila cypha). Using closed robust design mark-recapture models, we found, on average, spawning HBC transition to the skipped spawning state ( ¯ ) with a probability of 0.45 (95% CRI (i.e. credible interval): 0.10, 0.80) and skipped spawners remain in the skipped spawning state ( ¯ ) with a probability of 0.60 (95% CRI: 0.26, 0.83), yielding an average spawning cycle of every 2.12 years, conditional on survival. As a result, migratory skipped spawners are unavailable for detection during annual sampling events. If availability is unaccounted for, survival and detection probability estimates will be biased. Therefore, we estimated annual adult survival probability (S), while accounting for skipped spawning, and found S remained reasonably stable throughout the study period, with an average of 0.75 ((95% CRI: 0.66, 0.82), process variance 2 = 0.005), while skipped spawning probability was highly dynamic ( 2 = 0.306). By improving understanding of HBC spawning strategies, conservation decisions can be based on less biased estimates of survival and a more informed population model structure.

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PIT tag retention and tag induced mortality in juvenile bonytail and Gila chub

Cited by 25 publications

References 6 publications

Evaluation of PIT-tagging in an endangered Iberian cyprinid

Evaluation of PIT-tagging in an endangered Iberian cyprinid

Genetic markers reveal high PIT tag retention rates in giant salamanders (Cryptobranchus alleganiensis)

Evidence for skipped spawning in a potamodromous cyprinid, humpback chub (Gila cypha), with implications for demographic parameter estimates

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