A Laboratory Evaluation of Tagging‐Related Mortality and Tag Loss in Juvenile Humpback Chub

Ward, David L.; Persons, William R.; Young, Kirk L.; Stone, Dennis M.; Vanhaverbeke, David R.; Knight, William

doi:10.1080/02755947.2014.986345

Cited by 34 publications

(44 citation statements)

References 24 publications

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“…Tag loss and mortality were expected to be minimal for fish >65 mm TL based on laboratory studies (e.g., Ward et al. ) and on our experience with handling translocated Humpback Chub that were released into Shinumo Creek (see Spurgeon et al. 2015b), which is isolated from nontranslocated populations (there are two suspected tag losses out of 417 unique individuals that were recaptured; National Park Service, unpublished data).…”

Section: Methodsmentioning

confidence: 99%

Establishment of a Reproducing Population of Endangered Humpback Chub through Translocations to a Colorado River Tributary in Grand Canyon, Arizona

Healy

Smith

Schelly

et al. 2020

N American J Fish Manag

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Translocations, defined herein as the human‐assisted movement of individuals from a source population to other waters within their historical range, are prevalent in recovery plans for endangered fishes. Many translocations fail to establish new populations, however, and outcomes are often poorly documented. Endangered Humpback Chub Gila cypha persist as a self‐sustaining population in Grand Canyon, Arizona, despite threats from introduced nonnative competitors and predators and modified flow, thermal, and sediment regimes due to river regulation. In the decades following the completion of Glen Canyon Dam, the Grand Canyon population has been primarily sustained through reproduction in a single Colorado River tributary, the Little Colorado River (LCR). To establish population redundancy and aid in recovery, we annually translocated between 243 and 509 juvenile Humpback Chub from the LCR to Havasu Creek, a smaller Colorado River tributary in Grand Canyon National Park. Juvenile Humpback Chub were collected from the wild and reared in a hatchery for 8–12 months prior to the translocations. Through biannual mark–recapture sampling in Havasu Creek, we estimated annual abundance for all of the translocated cohorts and found that apparent survival and growth rates met or exceeded the demographic rates that are published for the LCR. We observed reproductively mature adults each year in May, beginning in 2012, and untagged juvenile Humpback Chub beginning in the following year and every year thereafter, with results that indicated successful reproduction. Beginning in 2016, we noted recruitment to maturity of fish that were produced in situ and the population's abundance increased through 2018, indicating potential for the establishment of a self‐sustaining population. As an example of the successful translocation of an endangered species that demonstrates the potential importance of tributaries in the recovery of large‐river fishes, our study may help to inform future recovery planning.

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Section: Methodsmentioning

confidence: 99%

Establishment of a Reproducing Population of Endangered Humpback Chub through Translocations to a Colorado River Tributary in Grand Canyon, Arizona

Healy

Smith

Schelly

et al. 2020

N American J Fish Manag

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“…Assumptions of tagging and marking include that the tag or mark does not impact fish survival, growth, or behavior and tagged fish are always recognized (i.e., no tag loss and tag or mark is always detected; Guy et al, ). Unfortunately, these assumptions are rarely met as tagging or marking often results in higher mortality (Catalano, Chipps, Bouchard, & Wahl, ; Knudsen et al, ; Ward & Persons, ), reduced growth (Knudsen et al, ; Malone, Forrester, & Steele, ), altered behavior (Guy et al, ; Jepsen, Thorstad, Havn, & Lucas, ), and tags or marks are often lost or undetected (McAllister, McAllister, Simon, & Werner, ; Rude, Whitledge, Phelps, & Hirst, ). Failing to meet or account for these assumptions can impact population abundance and mortality estimates along with assumptions of fish growth and behavior (Guy et al, ).…”

Section: Introductionmentioning

confidence: 99%

Retention of loop, monel, and passive integrated transponder tags by wild, free‐ranging Lake Sturgeon ( Acipenser fulvescens Rafinesque, 1817)

et al. 2019

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Tagging or marking of fish is instrumental to fisheries biologists and managers seeking to distinguish groups of fish, track movement or migration patterns, and monitor population characteristics. However, tag loss can inhibit the ability of biologists and managers to reach these objectives. The ability of Lake Sturgeon to live for long periods of time and reach large sizes, in combination with their dynamic spawning activity, requires tags to be retained under a variety of environmental and physically demanding conditions. This study evaluated tag retention of loop, monel, and passive integrated transponder (PIT) tags on wild, free‐ranging Lake Sturgeon in Lake Huron and the St. Clair – Detroit River System. Lake Sturgeon in this study were double‐tagged with both a PIT tag under one of the three anterior‐most dorsal scutes and an external tag (loop or monel) at the base of the dorsal fin. Fish were at large for up to 16 years. Overall, tag loss for PIT tags was 1% followed by monel tags at 12% and loop tags at 36%. Tag loss for loop tags was higher when the initial length of Lake Sturgeon tagged was smaller. Tag loss for monel tags increased with time at large but was not related to length at initial tagging. Monel tags left behind abrasion marks when attached to smaller Lake Sturgeon. PIT tag retention was higher than reported in previous studies that tagged other sturgeon species in different body locations. Monel tag retention was higher than other external tag types evaluated in previous studies while loop tags had similar retention rates to external tag types. Most previous studies on tag retention of sturgeon species were of shorter duration and conducted in laboratory settings, therefore loop tags may have performed more favorably during studies under short term laboratory settings. Results of this study suggest that PIT tags inserted below dorsal scutes represent a viable option for long‐term tracking of Lake Sturgeon. Monel tags attached at the base of the dorsal fin also seem to be a viable option relative to other external tag types, but should be limited to larger sturgeon as they can leave behind abrasion marks.

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“…; Ward et al. ). Finally, hook wounds are a product of typical angling practices, and to answer some questions they eliminate the need for artificial tags that can be an additional cost for researchers and managers and be an additional stressor for fish (Nielsen ; Guy et al.…”

Section: Discussionmentioning

confidence: 99%

Hook Wound Longevity and Use as an Indicator of Largemouth Bass Catch‐and‐Release Angling Pressure

Fernholz

Sylvia

Weber

2018

N American J Fish Manag

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Largemouth Bass Micropterus salmoides (hereafter, “bass”) is a popular sport fish primarily targeted for catch‐and‐release angling. Hook wounds obtained during angling may provide a short‐term mark that could provide an estimate of angling pressure. However, assessments of hook wound detection and longevity and the relationship between the proportion of bass with hook wounds and angler catches are needed before this mark can be validated. We conducted an experimental evaluation to determine the detectability and longevity of hook wounds in bass angled with two different lure types (single hook and crankbait) during May and July, 2015. Next, we evaluated the proportion of bass displaying hook wounds and the frequency of hook wounds in five mouth locations for 369 bass captured during 16 tournaments. Finally, we evaluated the relationship between the number of bass captured at tournaments and the proportion of bass with hook wounds captured by means of electrofishing to demonstrate the application of this technique in the assessment of angling pressure. Hook wounds were detected in 100% of experimentally angled bass on the day of capture. The lowest detection (73%) occurred on day 3, and wounds were detected in 91% of the bass on day 7. In May, 27% of hook wounds were healed (i.e., not detected for the remainder of the observation period) by day 6, whereas 12% of hook wounds were healed by day 6 in July. Hook wounds were detected in 84% of bass captured in tournaments and were evenly distributed among five mouth locations. Finally, the proportion of bass exhibiting hook wounds and captured by means of electrofishing between April and October ranged between 5% and 46% and was positively related to the number of bass weighed at the tournaments. Combined, our results indicate that hook wounds could represent a useful short‐term method of marking for estimating angling pressure.

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A Laboratory Evaluation of Tagging‐Related Mortality and Tag Loss in Juvenile Humpback Chub

Cited by 34 publications

References 24 publications

Establishment of a Reproducing Population of Endangered Humpback Chub through Translocations to a Colorado River Tributary in Grand Canyon, Arizona

Establishment of a Reproducing Population of Endangered Humpback Chub through Translocations to a Colorado River Tributary in Grand Canyon, Arizona

Retention of loop, monel, and passive integrated transponder tags by wild, free‐ranging Lake Sturgeon ( Acipenser fulvescens Rafinesque, 1817)

Hook Wound Longevity and Use as an Indicator of Largemouth Bass Catch‐and‐Release Angling Pressure

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