Age‐0 Lost River Sucker and Shortnose Sucker Nearshore Habitat Use in Upper Klamath Lake, Oregon: A Patch Occupancy Approach

Burdick, Summer M.; Hendrixson, Heather A.; VanderKooi, S.P.

doi:10.1577/t07-072.1

Cited by 22 publications

(14 citation statements)

References 24 publications

(27 reference statements)

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“…As with catchability and efficiency, few fisheries studies have estimated detectability, p. Detection probabilities vary among fish species and with habitat characteristics (Bayley and Peterson 2001;Burdick et al 2008;Hayer and Irwin 2008;Hewitt et al 2008). For example, seines are more efficient and, thus, have higher detection probabilities when used in unobstructed waters than when used in nearshore areas containing snags and other obstructions.…”

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confidence: 99%

Detectability of Estuarine Fishes in a Beach Seine Survey of Tidal Tributaries of Lower Chesapeake Bay

Williams

Fabrizio

2011

Trans Am Fish Soc

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Detectability, the probability of encountering a species at a sampling site, is often overlooked in fisheries research despite its potential to obscure inferences on habitat use and lead to biased estimates of abundance. We used occupancy models to explore factors affecting detectability and occupancy (Ψ), the probability that a species inhabits a site, for three fishes frequently captured in Chesapeake Bay seine surveys: young‐of‐the‐year (age‐0) striped bass Morone saxatilis, yearling Atlantic croaker Micropogonias undulatus, and spottail shiner Notropis hudsonius. Twelve repeat‐sampling events occurred during the summers of 2008 and 2009 at 20 sites in the Mattaponi and Pamunkey rivers, Virginia. Although the environmental factors that influenced detection probabilities varied with species, the detectability of all species was positively related to effective net length (i.e., the maximum distance from shore that the seine was deployed). The mean detectability of age‐0 striped bass, which occupied nearly every site (Ψ = 0.99, SE = 0.01), was 0.62 (SE = 0.06) and positively related to mean water temperature during sampling. The detectability of yearling Atlantic croakers was negatively related to water temperature at time of capture and was significantly greater in early summer than in late summer. In early summer, Atlantic croakers occupied all sampling sites; occupancy decreased in late summer (Ψ = 0.86, SE = 0.08) and was positively related to the mean salinity at the site. Unlike with Atlantic croakers, the mean detectability of spottail shiners was significantly greater in late summer than in early summer; detectability was positively related to turbidity at the time of sampling and reflected the increased availability of recently recruited individuals. Spottail shiners occupied fewer sites than did the two other species (Ψ = 0.59, SE = 0.21). Seasonal changes in detectability appeared to reflect changes in catchability associated with fish growth. Determining factors that influence detection probabilities is vital to improving our understanding of habitat use by fish and reducing the variation in fisheries sampling.

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confidence: 99%

Detectability of Estuarine Fishes in a Beach Seine Survey of Tidal Tributaries of Lower Chesapeake Bay

Williams

Fabrizio

2011

Trans Am Fish Soc

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“…Patch occupancy modeling is a technique for estimating site occupancy that explicitly accounts for detection probability (MacKenzie et al 2002). Unfortunately, to our knowledge only two studies to date (Burdick et al 2008;Hayer and Irwin 2008) have been published in the fishery literature using this method.…”

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confidence: 99%

Habitat selection by adult walleye during spawning season in irrigation reservoirs: a patch occupancy modeling approach

2011

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Recruitment of walleye (Sander vitreusMitchill) is limited in irrigation reservoirs of the Republican River basin in southwestern Nebraska. The causal mechanism for this limited recruitment is unknown, but may be related to a lack of suitable spawning habitat. Patch occupancy models were developed to describe variation in detection probability and habitat selection during spawning season using shoreline electrofishing data. Detection of adult walleye was negatively affected by water temperature, silt substrate, and woody cover. Adult walleye selected sites with cooler water temperatures and greater fetch at Enders Reservoir, and large rock substrate and no cover at Hugh Butler Lake; these characteristics are limited to areas on or near the riprap dams in both reservoirs. Walleye eggs were also only found in these areas. We conclude that patch occupancy modeling provided valuable information when considering habitat improvement projects and propose a management approach for the addition of walleye spawning habitat in irrigation reservoirs.

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“…It is possible that this temporal difference in spawning period evolved because of temporal differences in the types of prey available for consumption by larval and juvenile suckers in Utah Lake; perhaps zooplankton become available later than benthic macroinvertebrates. In the Klamath River basin, larval Klamath largescale sucker remain in spawning tributaries, whereas larval shortnose sucker migrate downstream to nearshore and wetland habitats in Upper Klamath Lake (Markle & Clauson 2006;Burdick et al 2008;Crandall et al 2008). Anthropogenic flow alterations of the Provo River, which began shortly after Europeans settled Utah Valley, have likely interfered with natural spawning cues in an already extremely stochastic environment and increasingly compressed suitable spawning periods, potentially increasing gene flow among morphs.…”

Section: Figmentioning

confidence: 99%

Morphological and genetic structuring in the Utah Lake sucker complex

et al. 2008

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Population decline in the federally endangered June sucker (Chasmistes liorus), a lakesucker unique to Utah Lake, Utah, has been attributed in part to hybridization with the more widespread Utah sucker (Catostomus ardens). As a group, suckers in Utah Lake exhibit considerable external morphological variation. Meristic and morphological ambiguities, presumably the result of hybridization, create a continuum of intermediate forms between Chasmistes and Catostomus extremes and prevent definitive identification to species. Here we describe and evaluate the morphological and genetic variation in suckers in Utah Lake by comparing a morphological analysis with amplified fragment length polymorphism and microsatellite analyses. Suckers were morphologically differentiated using mouth characters associated with different feeding strategies: planktivory (June sucker) and benthivory (Utah sucker). Although we found no genetic evidence for a deep divergence between June and Utah morphs, significant, but slight population structuring accompanied the substantial morphological variation. Bayesian model-based genetic clustering analyses detected two sucker populations in Utah Lake; however, these clusters were not strongly concordant with morphological groupings or between marker systems. The suckers in Utah Lake present an interesting dilemma regarding conservation: should one conserve (breed and stock) a subset of the morphotypic variation in the Utah Lake sucker complex, focusing on the endangered June sucker morphotype, or should one conserve both June sucker and Utah sucker morphotypes in this complex, possibly maximizing evolutionary potential? We explore this question in the context of current genetic and morphological variation in the Utah Lake sucker complex as well as historical information on this complex and other lakesuckers.

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Age‐0 Lost River Sucker and Shortnose Sucker Nearshore Habitat Use in Upper Klamath Lake, Oregon: A Patch Occupancy Approach

Cited by 22 publications

References 24 publications

Detectability of Estuarine Fishes in a Beach Seine Survey of Tidal Tributaries of Lower Chesapeake Bay

Detectability of Estuarine Fishes in a Beach Seine Survey of Tidal Tributaries of Lower Chesapeake Bay

Habitat selection by adult walleye during spawning season in irrigation reservoirs: a patch occupancy modeling approach

Morphological and genetic structuring in the Utah Lake sucker complex

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