Evaluating the use of coded-wire tags in individually marking Odonata larvae

2015 ◽  
Vol 148 (3) ◽  
pp. 371-374 ◽  
Author(s):  
S.V.L. Catania ◽  
S.J. McCauley
Keyword(s):  
Retention Rates ◽  
Larval Performance ◽  
Negative Effects ◽  
Efficient Manner ◽  
Tag Retention ◽  
Tag Loss ◽  
Leucorrhinia Intacta ◽  
Coded Wire Tags ◽  
Loss Rates

AbstractWe tested a potential new tool for marking Odonata larvae internally, evaluating the retention rates of injected coded-wire tags (CWT) and the effects of these tags on larval performance. Two species of dragonfly larvae (Epitheca canis McLachlan (Odonata: Corduliidae) and Leucorrhinia intacta Hagen (Odonata: Libellulidae)) were injected with CWT. Tag loss rates were assayed over experimental periods of 22 and 60 days, respectively for the two species. To assess whether tagging had negative effects on larvae, mortality, and growth of tagged larvae were compared to untagged larvae held in the same conditions. Tag retention rates were high (92–100%) and CWT were easily retrieved from preserved larvae via dissection, permitting most tagged larvae to be individually identified. There was 100% survival in larvae injected with CWT and tags do not appear to impair growth. The high retention and retrieval rates of this marking approach combined with no increase in mortality associated with tagging suggest that CWT are a useful means of individually labelling a large number of Odonata larvae in a time-efficient manner.

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.

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.

Evaluation of subcutaneously implanted visual implant tags and coded wire tags for marking and benign recovery in a small scaleless fish, Galaxias truttaceus (Pisces: Galaxiidae)

1995 ◽  
Vol 46 (6) ◽  
pp. 943 ◽  
Author(s):  
DA Crook ◽  
RWG White
Keyword(s):  
Field Conditions ◽  
Retention Rates ◽  
Caudal Fin ◽  
Information Recovery ◽  
Total Length ◽  
Tag Loss ◽  
Fin Rays ◽  
Coded Wire Tags

Visual implant (VI) tags and coded wire tags (CWTs) were tested as methods for marking a small galaxiid fish, Galarias truttaceus, in such a way as to allow benign information recovery. VI tags were implanted beneath the skin of the preoperculum and CWTs were implanted between caudal fin rays. Both types of tag were easily implanted into fish >90 mm total length (4-5 g). Retention rates of both tag types were evaluated under field conditions. Retention of VI tags implanted in the preoperculum was estimated at 100% after 14 days and 92% after 131 days. There was a loss of 8-18% of CWTs within the first four weeks after tagging. Tag loss continued more gradually thereafter and retention was estimated at 71% after 131 days. It was demonstrated that both types of tags could be applied successfully to four other species of Galaxias.

Planning programs to estimate salmon harvest with coded-wire tags

1998 ◽  
Vol 55 (8) ◽  
pp. 1983-1995 ◽  
Author(s):  
David R Bernard ◽  
Robert P Marshall ◽  
John E Clark
Keyword(s):  
Sampling Methods ◽  
Coho Salmon ◽  
Cost Functions ◽  
Commercial Fisheries ◽  
Sampling Strategies ◽  
Sample Sizes ◽  
Field Sampling ◽  
Tag Loss ◽  
Coded Wire Tags

Methods are presented for planning individual catch-sampling, tagging, and field-sampling programs to estimate salmon (Oncorhynchus spp.) harvest in recreational and commercial fisheries from several hatchery-produced and wild cohorts through recovery of coded-wire tags. We show how to determine sample sizes sufficiently large to detect harvest and link sample sizes to expenditures through linear and allometric cost functions to determine optimal tagging and catch-sampling rates. Sample sizes that will minimize bias and variance are charted for field-sampling programs designed to estimate the fraction of a cohort with tags. We describe sampling strategies that can be used to detect or to minimize bias in harvest estimates from tag loss, tag-induced mortality, tag-induced straying, and nonrandom sampling. Methods are demonstrated with data on cohorts of chinook (O. tshawytscha) and coho salmon (O. kisutch) from Alaska.

scholarly journals Escapement of Broodstock Chinook Salmon From Whitlock Bay Spawning Station, Lake Oahe, South Dakota

2020 ◽  
Vol 9 (1) ◽  
pp. 18
Author(s):  
Dylan A Gravenhof ◽  
Michael E Barnes ◽  
Robert Hanten
Keyword(s):  
South Dakota ◽  
Chinook Salmon ◽  
Oncorhynchus Tshawytscha ◽  
Tag Retention ◽  
Tag Loss ◽  
Fish Ladder

Feral spawning fall Chinook salmon (Oncorhynchus tshawytscha) in Lake Oahe, South Dakota, are captured using a fish ladder and catch raceway at Whitlock Bay Spawning Station. The number of salmon that escaped the catch raceway and descended the fish ladder prior to spawning was unknown. During October 2017, all salmon that ascended the fish ladder at the spawning station were tagged. Tagged males remained in the catch raceway. Tagged females were moved to other secure raceways and used to estimate tag retention. Of the 383 tagged males, 159 (41.5%) were initially designated as escaped from the catch raceway. Tag loss in the females was 3.9%. Thus, the estimated male salmon escapement rate from the catch raceway was 37.6%. Male salmon remained in the catch raceway for one-to-three days before escaping. The escapement rate decreased over the month-long spawn, with nearly 60% of the males going back down the fish ladder in the first week of October, compared to less than 20% escapement by the final week. Such high rates of escapement from the spawning station may be negatively impacting the spawning efficiencies. Possible solutions include re-engineering of the fish ladder or daily removal of the salmon in the catch raceway to other more secure locations at the spawning station.

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 Preliminary evaluation of the effectiveness of visible implant elastomer and coded wire tags for tagging young-of-the-year Atlantic sturgeon, Acipenser oxyrinchus

2015 ◽  
Vol 23 (4) ◽  
pp. 227-230 ◽  
Author(s):  
Andrzej Kapusta ◽  
Arkadiusz Duda ◽  
Grzegorz Wiszniewski ◽  
Ryszard Kolman
Keyword(s):  
Body Weight ◽  
Retention Rate ◽  
Retention Rates ◽  
Preliminary Evaluation ◽  
Atlantic Sturgeon ◽  
Size Groups ◽  
Young Of The Year ◽  
Acipenser Oxyrinchus ◽  
The Impact ◽  
Coded Wire Tags

Abstract The aim of the study was to determine the retention rates of visible implant elastomer (VIE) and coded wire tags (CWT) and the impact tagging had on the growth of Atlantic sturgeon, Acipenser oxyrinchus Mitchill, during an eight-week rearing period under laboratory conditions. Two size groups of young-of-the-year (YOY) sturgeon were used in the study. The tagging was not found to have a significant impact on the final total length or body weight or the condition coefficient of the sturgeon from either size group. Sturgeon survival in the different groups ranged from 90.6 to 100%. Mortality was not noted until two (CWT) and four (VIE) weeks following tagging and was probably not linked to tagging. The retention rate for VIE tags implanted in the rostrum in both size groups was 100%, while for tags implanted at the base of the pectoral fin was 93.5%. The retention of CWT in the smaller fish was 90%, and in the larger sturgeon it was 100%. Tagging small sturgeon with CWT and VIE is minimally invasive, and it did not impact the growth or condition of the tagged fish.

Ear-tag loss rates in American beavers

2013 ◽  
Vol 38 (1) ◽  
pp. 122-126 ◽  
Author(s):  
Steve K. Windels
Keyword(s):  
Tag Loss ◽  
Loss Rates
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