Acoustic telemetry to assess post‐stocking dispersal and mortality of razorback sucker <i>Xyrauchen texanus</i>

Karam, Abraham P.; Kesner, Brian R.; Marsh, Paul C.

doi:10.1111/j.1095-8649.2008.01947.x

Cited by 26 publications

(27 citation statements)

References 17 publications

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“…In the interim acoustic telemetry studies were performed with small numbers of razorback sucker at the potentially optimal stocking size of 500 mm TL and at the previously common release size of 380 mm TL to test the hypothesis. The results from these studies were unequivocal and confirmed the size-survival relationship, but survival also varied dramatically from year to year [22]. In addition, an acoustic tag that was implanted in a 520-mm TL razorback sucker was recovered from the stomach of a relatively average sized 13-kg striped bass by a fisherman [23], providing evidence that no size was completely safe from predation; the maximum length of razorback sucker is thought to be near a meter [24], but few individuals longer than 700 mm now are encountered [18,20].…”

Section: Research Adaptation and Emerging Technologysupporting

confidence: 62%

Adaptive Management of an Imperiled Catostomid in Lake Mohave, Lower Colorado River, USA

Kesner¹,

Wisenall²,

Marsh³

2016

Lake Sciences and Climate Change

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Lake Mohave, a man-made reservoir in the lower Colorado River, USA, was once home to the largest wild population of the endemic and endangered razorback sucker Xyrauchen texanus, estimated at 60,000 individuals in the late 1980s. Individuals of this population were 25 years or older because recruitment was precluded by the removal of larval production by introduced centrarchid species. A repatriation program was initiated in the 1990s to replace the aging population with young fish by capturing larvae from the reservoir and raising them in hatcheries and protected lakeside backwaters until they were released back into the reservoir. Although more than 200,000 fish have been repatriated to Lake Mohave, the repatriate population has remained at a few thousand fish. The wild population is now functionally extinct. The program has adapted to new threats to the population, political realities, and technological advances. Management shifted in 2006 to the Lower Colorado River Multi-Species Conservation Program, which has politicized the process. The aim of this chapter is to describe the initial, informal adaptive management strategy for razorback sucker in Lake Mohave, the transition to a formal program, and the inherent pitfalls that formalization entails.

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Section: Research Adaptation and Emerging Technologysupporting

confidence: 62%

Adaptive Management of an Imperiled Catostomid in Lake Mohave, Lower Colorado River, USA

Kesner¹,

Wisenall²,

Marsh³

2016

Lake Sciences and Climate Change

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“…Females can be extremely fecund, with some of the larger individuals capable of producing more than 100,000 ova per year. Telemetry studies have shown that they are capable of considerable movement, including trips to multiple spawning areas within a season (Tyus and Karp 1990;Mueller et al 2000;Karam et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Genetic structure within and among populations of the endangered razorback sucker (Xyrauchen texanus) as determined by analysis of microsatellites

2012

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Razorback sucker (Xyrauchen texanus) was once common and widely distributed throughout the Colorado River drainage of western North America. Water development and predation by non-native species led to significant decrease in the species' range, and dramatic reduction in size of remaining populations. Previous analyses of mtDNA variation determined that most variation was found within locations and that haplotypes were randomly distributed relative to geography, indicating these samples represent remnants of a single, basin-wide population. In addition, both diversity and number of haplotypes declined progressively down-to upstream, consistent with geologically-recent expansion into the northern portions of the basin. Analyses of variation at 13 microsatellite loci also identified a decrease in genetic variation from downto upstream, also consistent with the hypothesis of recent expansion. Analyses of population structure identified three distinct groups, but the majority of microsatellite variation was found within populations. Most individuals from the upper Colorado River were identified as a discrete unit. These individuals exhibited high levels of relatedness, indicating this represented an isolated group of closely related individuals. There also were significant differences between populations above and below the Grand Canyon; however, estimates of H were relatively low. Given nothing is known of local adaptation in this species, populations above and below the canyon should be managed as independent units; however, if numbers become too low it will be possible to translocate individuals from southern populations northward to increase levels of genetic variability and decrease relatedness within units. These results also illustrate the need for careful consideration of all available information when using molecular data in identifying units for management.

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“…For example, knowledge of critical habitats and the movements among them is important for the protection of threatened species (Simpson & Mapleston, ; Ebner & Thiem, ). Movement and dispersal data can be used to refine stocking practices (Karam et al , ) and control programmes for invasive fishes (DeGrandchamp et al , ).…”

mentioning

confidence: 99%

Repeatability of movement behaviour in a wild salmonid revealed by telemetry

Taylor

Cooke

2014

Journal of Fish Biology

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Movement estimates derived from sub-daily tracking of radio-tagged bull trout Salvelinus confluentus on the Columbia River, British Columbia, Canada, were used to test whether interindividual variation in behaviour was repeatable among contexts, both short- and long-term. Interindividual variation in S. confluentus behaviour was consistent across contexts. These findings emphasize the potential for telemetry as a tool in animal personality and temperament research.

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Acoustic telemetry to assess post‐stocking dispersal and mortality of razorback sucker Xyrauchen texanus

Cited by 26 publications

References 17 publications

Adaptive Management of an Imperiled Catostomid in Lake Mohave, Lower Colorado River, USA

Adaptive Management of an Imperiled Catostomid in Lake Mohave, Lower Colorado River, USA

Genetic structure within and among populations of the endangered razorback sucker (Xyrauchen texanus) as determined by analysis of microsatellites

Repeatability of movement behaviour in a wild salmonid revealed by telemetry

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