Breeding Return Times and Abundance in Capture–Recapture Models

Pledger, Shirley; Baker, E. A.; Scribner, Kim T.

doi:10.1111/biom.12094

Cited by 27 publications

(27 citation statements)

References 39 publications

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“…Secondly, the best model's φ estimate had moderate error about the mean (mean = 0.95; 95% CI = 0.66–0.99) but fell within other reported survival estimates (Pledger et al. ). Although limiting apparent survival to a single estimate improved overall model performance and reduced confounding effects, errors about the b and φ parameter estimates could be improved.…”

Section: Discussionsupporting

confidence: 74%

Integrating Acoustic Telemetry into a Mark–Recapture Model to Improve Catchability Parameters and Abundance Estimates of Lake Sturgeon in Eastern Lake Erie

Withers

Einhouse

Clancy

et al. 2019

N American J Fish Manag

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Estimating abundances of rare fish species that exhibit low recapture rates can be challenging and can require decades’ worth of data to produce reliable results. However, when data sets are limited, auxiliary information used to fix model parameters may improve model outputs if that information is reasonably estimated. We collected mark–recapture data on 195 unique Lake Sturgeon Acipenser fulvescens in eastern Lake Erie near the headwaters of the Niagara River between 2012 and 2018. We ran Jolly–Seber capture–recapture models with the POPAN formulation in Program R using the RMark package to estimate abundance within our study area. Initial model runs produced unreasonable parameters (e.g., >99% survival). To improve our model, we integrated acoustic telemetry presence–absence data to calculate and fix catchability parameters in our model. Integrating acoustic telemetry‐derived catchability parameters in our mark–recapture model produced adult abundance estimates (mean ± SE = 889 ± 184) that might not otherwise have been achieved given our relatively small data set and few recaptures. Our findings demonstrate the potential value of integrating reasonably estimated parameters generated by acoustic telemetry studies into mark–recapture.

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Section: Discussionsupporting

confidence: 74%

Integrating Acoustic Telemetry into a Mark–Recapture Model to Improve Catchability Parameters and Abundance Estimates of Lake Sturgeon in Eastern Lake Erie

Withers

Einhouse

Clancy

et al. 2019

N American J Fish Manag

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“…We cannot find any previous estimates of spawning periodicity in blue sucker. Pledger, Baker, and Scribner () developed a statistical model that used recapture data to estimate the precise distribution of spawning return times within a population. We attempted to use this model, but it required more individuals with multiple recapture histories than we had, and consequently the model did not converge and we could not generate spawning interval estimates.…”

Section: Discussionmentioning

confidence: 99%

Habitat use and population characteristics of potentially spawning shovelnose sturgeonScaphirhynchus platorynchus(Rafinesque, 1820), blue sucker (Cycleptus elongatus(Lesueur, 1817), and associated species in the lower Wisconsin River, USA

et al. 2016

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Summary The goal of this study was to compare the possible locations, timing, and characteristics of potentially spawning shovelnose sturgeon (Scaphirhynchus platorynchus), blue sucker (Cycleptus elongatus), and associated species during the spring of 2007–2015 in the 149‐km‐long lower Wisconsin River, Wisconsin, USA, a large, shallow, sand‐dominated Mississippi River tributary. A 5‐km index station of two pairs of rocky shoals surrounded by sandy areas was electrofished for shovelnose sturgeon and blue sucker in a standardized fashion a total of 40 times from late March through mid‐June, the presumed spawning period. On one date in 2008 and two dates in 2012, all rocky shoals and adjacent sandy areas in the lowermost 149 km of the river were also electrofished for both species. Shovelnose sturgeon and blue sucker appeared to spawn in the limited rocky areas of the river along with at least four other species: mooneye (Hiodon tergisus), quillback (Carpiodes cyprinus), smallmouth buffalo (Ictiobus bubalus), and shorthead redhorse (Moxostoma macrolepidotum), usually at depths of 0.8–2.0 m and surface velocities of 0.4–1.0 m/s. However, apparently spawning shovelnose sturgeon were found only on mid‐channel cobble and coarse gravel shoals within a single 7‐km segment that included the 5‐km index station, whereas apparently spawning blue suckers were encountered on these same shoals but also more widely throughout the river on eroding bluff shorelines of bedrock and boulder and on artificial boulder wing dams and shoreline rip‐rap. Both species showed evidence of homing to the same mid‐channel shoal complexes across years. Blue sucker tended to concentrate on the shoals earlier in the spring than shovelnose sturgeon, usually from late April through mid‐May at water temperatures of 8.0–15.5°C along with quillback and shorthead redhorse. In comparison, shovelnose sturgeon usually concentrated on the shoals from mid‐May through early June at 13.5–21.8°C along with mooneye and smallmouth buffalo. Based on recaptures of tagged fish, at least some shovelnose sturgeon and blue sucker returned to the shoals at one‐year intervals, although there was evidence that female blue sucker may have been more likely to return at two‐year intervals. Most shovelnose sturgeon could not be reliably sexed based on external characteristics. Spawning shovelnose sturgeon ranged from 487 to 788 mm fork length, 500–2400 g weight, and 5–20 years of age, whereas spawning blue sucker ranged from 495 to 822 mm total length, 900–5100 g weight, and 5–34 years of age, although age estimates were uncertain. Females were significantly larger than males for both species although there was overlap. Growth in length was negligible for tagged and recaptured presumably spawning shovelnose sturgeon and low (3.5 mm/y) for blue sucker, suggesting that nearly all growth may have occurred prior to maturity and that fish may have matured at a wide range of sizes.

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“…This research was conducted using eggs collected from adult female Acipenser fulvescens from the Black Lake population, Michigan. Adult population size has been estimated to be ~1,100 (Pledger, Baker, & Scribner, ). The Upper Black River (UBR) is the largest tributary of Black Lake and contains 11.5 km of staging and spawning habitat downstream of Kleber Dam (built ca.…”

Section: Methodsmentioning

confidence: 99%

Effects of crayfish density, body size and substrate on consumption of lake sturgeon (Acipenser fulvescens Rafinesque, 1817) eggs by invasive rusty crayfish [(Orconectes rusticus (Girard, 1852)]

et al. 2018

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Summary The density and size of benthic predators such as crayfish and the physical characteristics of aquatic habitats including benthic substrate size have been hypothesized to significantly affect levels of lake sturgeon (Acipenser fulvescens) egg consumption. The invasive rusty crayfish (Orconectes rusticus) was used to quantify consumption and apportion variation in egg loss in an experimental setting. Experiments consisted of large flow‐through rectangular tanks (0.8 m wide, 2.96 m2 total bottom surface area) receiving river water to mimic natural diel temperature regimes. Four crayfish densities were tested (5, 10, 15, 30 individuals or 1.7, 3.4, 5.1, 10.1 individuals/m2) that span the range of densities observed in natural settings. Crayfish were allowed to freely move among three substrates commonly found at spawning locations where lake sturgeon eggs are deposited (cobble, gravel and sand). After an acclimation period (15 min), 200 lake sturgeon eggs were randomly scattered over each substrate category (600 eggs per tank). Mean (± SE) egg consumption over 48 hr was 80 ± 3% (range 19–100% across 16 replicate trials). Egg consumption increased significantly as a function of increasing crayfish density. The effect of substrate size, however, depended significantly on crayfish density (substrate size × predator density interaction). Egg consumption significantly increased as substrate size decreased (e.g. from gravel to sand), at both high and low crayfish densities. Egg consumption also increased with increasing mean crayfish body size. Our results revealed that levels of lake sturgeon egg consumption by rusty crayfish are high in some settings. Further work is needed to determine if egg consumption in natural river settings is similarly high and whether egg consumption by crayfish and other egg predators could negatively affect population levels of recruitment.

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Breeding Return Times and Abundance in Capture–Recapture Models

Cited by 27 publications

References 39 publications

Integrating Acoustic Telemetry into a Mark–Recapture Model to Improve Catchability Parameters and Abundance Estimates of Lake Sturgeon in Eastern Lake Erie

Integrating Acoustic Telemetry into a Mark–Recapture Model to Improve Catchability Parameters and Abundance Estimates of Lake Sturgeon in Eastern Lake Erie

Habitat use and population characteristics of potentially spawning shovelnose sturgeonScaphirhynchus platorynchus(Rafinesque, 1820), blue sucker (Cycleptus elongatus(Lesueur, 1817), and associated species in the lower Wisconsin River, USA

Effects of crayfish density, body size and substrate on consumption of lake sturgeon (Acipenser fulvescens Rafinesque, 1817) eggs by invasive rusty crayfish [(Orconectes rusticus (Girard, 1852)]

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