Retention of radio tags in golden perch (Macquaria ambigua), silver perch (Bidyanus bidyanus) and carp (Cyprinus carpio)

2009 ◽  
Vol 60 (4) ◽  
pp. 334 ◽  
Author(s):  
J. P. O'Connor ◽  
J. D. Koehn ◽  
S. J. Nicol ◽  
D. J. O'Mahony ◽  
J. A. McKenzie
Keyword(s):  
Success Rate ◽  
Freshwater Fish ◽  
Peritoneal Cavity ◽  
Retention Rates ◽  
Radio Tracking ◽  
Tag Retention ◽  
Limited Success ◽  
Carp Cyprinus Carpio ◽  
Fish Survival ◽  
Rejection Rates

Radio tagging and tracking are widely used to study freshwater fish; however, details of fish survival or tag retention rates are rarely reported. The results from five independent tagging trials associated with different tag attachment methods are reported in the present study. Implanted peritoneal cavity tags were trialled for two native Australia freshwater fish species (golden perch and silver perch) and introduced carp. Oesophageal and external tags were also trialled on silver perch. The results from the peritoneal cavity implantation trials in golden perch, silver perch and carp achieved an overall success rate of 81% (after 315 days), 18% (after 200 days) and 43% (after 323 days) respectively. The external attachment of radio tags to silver perch had limited success with all fish either rejecting their tags or dying before 256 days. Silver perch trialled with oesophageal tags had an overall success rate of 25% after 200 days. The trials indicate that internal tagging is suitable for longer-term radio tracking of golden perch, but further developments are required for longer-term applications to silver perch and carp. Tag rejection rates are unlikely to be constant between species or through time and this variability should be incorporated into the study design to prevent bias.

Effects of tag type, morphological location and tagger experience on tag retention rates in freshwater fishes

2019 ◽  
Vol 70 (6) ◽  
pp. 891
Author(s):  
Jarod P. Lyon ◽  
Robin Hale ◽  
Adrian Kitchingman ◽  
Justin O'Connor ◽  
Joanne Sharley ◽  
...  
Keyword(s):  
Conservation Management ◽  
Retention Rates ◽  
Lowland River ◽  
Passive Integrated Transponder ◽  
Tag Retention ◽  
Eastern Australia ◽  
Murray Cod ◽  
Pit Tagging ◽  
River Fish ◽  
Rejection Rates

Mark–recapture of fish is often used to inform fisheries or conservation management. Given that variability in tagging efficiencies can affect estimates of population size, it is important that rates of tag rejection are quantified. We double tagged over 45000 large-bodied, long-lived fish in a turbid lowland river in south-eastern Australia. During yearly recapture fish surveys, data on tag rejection were collected. We found that the probability of tag rejection varied as a function of fish species, tag type and tagger experience. Floy tags were more likely to be rejected as dart tags in large-bodied golden perch Macquaria ambigua (6 and 3% respectively), silver perch (18 and 4% respectively) and trout cod (19 and 7% respectively), whereas rates of rejection in the large-bodied Murray cod Maccullochella peelii were similar for both tag types (12 and 10% respectively). More experienced taggers had lower rates of rejection, which varied between 1 and 48% for individual taggers. We trialled three morphological locations for passive integrated transponder (PIT) tagging of fish, with rejection rates lowest for tags implanted in the stomach cavity and highest for those implanted in the pectoral musculature. This study presents the first tag rejection rates for dart, floy and PIT tags for lowland Australian river fish, information that can help guide future monitoring programs.

Modeling data from double-tagging experiments to estimate heterogeneous rates of tag shedding in lake trout (Salvelinus namaycush)

1999 ◽  
Vol 56 (8) ◽  
pp. 1409-1419 ◽  
Author(s):  
Mary C Fabrizio ◽  
James D Nichols ◽  
James E Hines ◽  
Bruce L Swanson ◽  
Stephen T Schram
Keyword(s):  
Lake Trout ◽  
Survival Rates ◽  
Salvelinus Namaycush ◽  
Wild Fish ◽  
Retention Rates ◽  
Type I ◽  
Tag Retention ◽  
Tag Loss ◽  
Modeling Data ◽  
Tag Shedding

Data from mark-recapture studies are used to estimate population rates such as exploitation, survival, and growth. Many of these applications assume negligible tag loss, so tag shedding can be a significant problem. Various tag shedding models have been developed for use with data from double-tagging experiments, including models to estimate constant instantaneous rates, time-dependent rates, and type I and II shedding rates. In this study, we used conditional (on recaptures) multinomial models implemented using the program SURVIV (G.C. White. 1983. J. Wildl. Manage. 47: 716-728) to estimate tag shedding rates of lake trout (Salvelinus namaycush) and explore various potential sources of variation in these rates. We applied the models to data from several long-term double-tagging experiments with Lake Superior lake trout and estimated shedding rates for anchor tags in hatchery-reared and wild fish and for various tag types applied in these experiments. Estimates of annual tag retention rates for lake trout were fairly high (80-90%), but we found evidence (among wild fish only) that retention rates may be significantly lower in the first year due to type I losses. Annual retention rates for some tag types varied between male and female fish, but there was no consistent pattern across years. Our estimates of annual tag retention rates will be used in future studies of survival rates for these fish.

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

2012 ◽  
Vol 33 (2) ◽  
pp. 313-317 ◽  
Author(s):  
Shem D. Unger ◽  
Nicholas G. Burgmeier ◽  
Rod N. Williams
Keyword(s):  
Cost Effective ◽  
Retention Rates ◽  
Population Declines ◽  
Pit Tag ◽  
Amphibian Species ◽  
Pit Tags ◽  
Tag Retention ◽  
Cryptobranchus Alleganiensis ◽  
Genetic Tagging ◽  
Secondary Methods

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.

scholarly journals Unprecedented account of mortality and morbidity in free ranging Formosan Pangolin (Manis pentadactyla pentadactyla)

2018 ◽  
Author(s):  
Nick Ching-Min Sun ◽  
Bharti Arora ◽  
Jing-Shiun Lin ◽  
Wen-Chi Lin ◽  
Meng-Jou Chi ◽  
...  
Keyword(s):  
Success Rate ◽  
Illegal Trade ◽  
Wild Animals ◽  
Radio Tracking ◽  
Mortality And Morbidity ◽  
Manis Pentadactyla ◽  
Rescue Center ◽  
Free Ranging

AbstractGlobally, pangolins are overt for poaching and illegal trade, but Taiwan projects totally a contrary image where their population is stable and increasing. This paper illustrated the factors responsible for causing mortality and morbidity in free ranging Formosan pangolin (M. pentadactyla pentadactyla). Results from radio-tracking showed that Formosan pangolins are highly susceptible to stuck in tree hallows or ground burrows despite being proficient burrowers, and killed by gin traps, especially during the dryer season. Whilst the data consolidated from the Pingtung Rescue Center for Endangered Wild Animals illustrated the trauma (73.0%) was the major reason of causing morbidity in Formosan pangolin. The gin traps were the leading cause of trauma (77.8%) along with tail injuries caused by dog attack (20.4%). Despite all the pressing data about the injuries Taiwan, it is able to establish substantial success rate in rescuing and releasing pangolins through consolidating and applying valuable information among the rescue centers in the span of two decades. Taiwan has made a phenomenal progress in sustaining a salubrious population of pangolin but the situation requires continuous examination to ensure the existence of this species on the island.

Evaluation of coded wire tags for marking fingerling golden perch, Macquaria ambigua (Percichthyidae), and silver perch, Bidyanus bidyanus (Teraponidae)

1993 ◽  
Vol 44 (6) ◽  
pp. 817 ◽  
Author(s):  
BA Ingram
Keyword(s):  
Retention Rates ◽  
Small Fish ◽  
Large Fish ◽  
Recreational Fisheries ◽  
Factors Affecting ◽  
Operator Experience ◽  
Tag Retention ◽  
Total Length ◽  
Coded Wire Tags

Trials were conducted to evaluate coded wire tags for marking hatchery-produced golden perch and silver perch fingerlings prior to their release into the wild. Two size classes of fish were tagged: 'small' fish were 21-39 mm in total length and 'large' fish were 50-71 mm in total length. Tags were implanted into either the cheek muscle or the snout. Tagging rates were 200-548 fish h-1. Although tag retention in large cheek-tagged golden and silver perch was 100% after 30 days, rearing fish to this size was not practical. Retention rates for small cheek-tagged golden perch (94%) and silver perch (100%), the usual size of fingerlings when released to the wild, were considered to be sufficient for a tagging programme. Retention of tags in the snout was poor; only 6% of golden perch and 48% of silver perch retained tags after 30 days. Most cheek-implanted tags that were shed by fish during long-term tag-retention trials were lost in the first four months. With the exception of silver perch in one trial, which were infested by Ichthyophthirius multtfiliis, survival of tagged fish was 95-100% after 30 days. Factors affecting tag retention and survival of tagged fish, including fish size, tagging site and operator experience, are discussed. The results indicate that coded wire tags are a potential means of marking golden and silver perch fingerlings prior to stocking. Their use will assist fisheries managers in the assessment of the contribution of stocking programmes to commercial and recreational fisheries.

scholarly journals Long-Term PIT and T-Bar Anchor Tag Retention Rates in Adult Muskellunge

2011 ◽  
Vol 31 (3) ◽  
pp. 515-519 ◽  
Author(s):  
Neil P. Rude ◽  
Gregory W. Whitledge ◽  
Quinton E. Phelps ◽  
Shawn Hirst
Keyword(s):  
Retention Rates ◽  
Tag Retention

Evaluation of visible implant fluorescent elastomer (VIE) as a tagging technique for spiny lobsters (Jasus edwardsii)

2003 ◽  
Vol 54 (7) ◽  
pp. 853 ◽  
Author(s):  
Chris M. C. Woods ◽  
Philip J. James
Keyword(s):  
Abdominal Segment ◽  
Retention Rates ◽  
Muscle Fibres ◽  
Flexor Muscle ◽  
Growth And Survival ◽  
Tag Retention ◽  
Jasus Edwardsii ◽  
Spiny Lobsters ◽  
High Degree ◽  
Detrimental Impact

Tagging crustaceans for growth studies is often difficult because external tags/marks may be shed or cause mortalities during moulting. In this investigation, the effectiveness of visible implant fluorescent elastomer (VIE) as an invasive tagging technique for spiny lobsters (Jasus edwardsii) was investigated over a 6-month period. Tagged lobsters were either tagged with the tag running transversely across the ventral abdominal superficial flexor muscle block (transverse VIE) in the second abdominal segment, or in-line with the ventral abdominal superficial flexor muscle block (longitudinal VIE). Non-tagged lobsters were used as the control. At the conclusion of the investigation there were no differences in growth or survival between tagged lobsters and untagged controls and tag retention rates were 100% for both tagging treatments over the 6-month period. Tag visibility was high after six months in both tagging treatments, although higher in the longitudinal VIE treatment. Tag fragmentation was frequent in the transverse VIE treatment, but infrequent in the longitudinal VIE treatment. We conclude that VIE is an effective tagging technique for J. edwardsii in terms of the high degree of tag visibility, retention, and non-detrimental impact on the growth and survival of tagged animals, provided the VIE tag is injected in-line with the orientation of the muscle fibres/tissue.

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