Effect of Roost Harassment on Cormorant Movements and Roosting in the Delta Region of Mississippi

Tobin, Mark E.; King, D. Tommy; Dorr, Brian S.; Werner, Scott J.; Reinhold, David S.

doi:10.1675/1524-4695(2002)025[0044:eorhoc]2.0.co;2

Cited by 21 publications

(26 citation statements)

References 12 publications

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“…All observers used three-element yagi antennae and R4000 receivers (ATS, Inc.®). An observer monitored the presence of cormorants at 15 of 19 known night roost locations along a transect between sunset and sunrise two nights/week (Tobin et al 2002). The transect extended about 163 km from Bluff Lake, Mississippi, down the Tombigbee River to Oak Chia, Alabama, then up the Black Warrior River to Cypress Pond, Alabama (Fig.…”

Section: Ethodsmentioning

confidence: 99%

“…Because Glahn et al (1996) and Tobin et al (2002) reported gender differences in distances moved and utilization of aquaculture in the delta region of Mississippi, these factors were evaluated with respect to movements of males and females in the aquaculture area of eastern Mississippi and western Alabama. Analysis of variance and Tukey's Studentized Range Test (SAS Institute 1994) were used to determine differences in distances traveled from night roosts to subsequent day locations and subsequent night roost locations for males and females.…”

Section: Ethodsmentioning

confidence: 99%

“…Mott et al (1998) reported a ≥ 70% reduction in predation on catfish after cormorants were dispersed from nearby roosts. The objective of this roost harassment program is to move cormorants away from where catfish farms are concentrated, to areas where there is a lower fish farm density and more natural habitat, such as along the Mississippi River and adjacent oxbow lakes (Glahn and Stickley 1995;Glahn et al 1998;Glahn et al 2000b;Tobin et al 2002).…”

mentioning

confidence: 99%

“…data). Uncoordinated roost harassment has been shown to be ineffective in moving birds away from aquaculture producing areas because birds typically relocate to the nearest nonharrassed roost site (King 1996;Mott et al 1998;Tobin et al 2002).…”

mentioning

confidence: 99%

“…King et al (1995), King (1996) and Tobin et al (2002) used VHF radio telemetry to determine activity budgets, foraging behavior, and gender differences related to foraging on aquaculture, and to evaluate the effectiveness of roost harassment programs.…”

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confidence: 99%

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Double-crested Cormorant Movements in Relation to Aquaculture in Eastern Mississippi and Western Alabama

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Section: Ethodsmentioning

confidence: 99%

Section: Ethodsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Double-crested Cormorant Movements in Relation to Aquaculture in Eastern Mississippi and Western Alabama

et al. 2004

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Environmental Best Management Practices for Aquaculture

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Hargreaves²

2008

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Aquaculture depredation by double‐crested cormorants breeding in Eastern North America

et al. 2015

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The double‐crested cormorant (Phalacrocorax auritus) has undergone population expansion throughout much of its historical range since the 1970s, resulting in increased pressure on foraging habitats including real and perceived competition with commercial and sport fisheries and impacts on the aquaculture industry. The specific objectives of this study were to determine the stable isotope ratios of birds wintering at aquaculture facilities and natural freshwater and marine habitats, and to determine what percent of birds at distinct breeding colonies wintered in each of these habitats. We exploited natural variation in isotopic ratios of carbon, nitrogen, and sulfur (from feathers) to determine the winter habitat use (i.e., aquaculture, natural freshwater, or marine) of birds collected on their summer breeding grounds in the eastern United States (from Minnesota to Vermont). The distribution of winter habitat use varied significantly across breeding colonies and between male and female cormorants. More specifically, use of aquaculture winter habitat was most prevalent in birds breeding in Lake Huron and Lake Erie. Overall, aquaculture habitats were used more by males, and marine habitats were used more by females. The stable isotope approach used in this study provided dietary confirmation of previously observed migratory patterns in the double‐crested cormorant. Because aquaculture was primarily used by males, and these males migrated to a broad range of breeding colonies, we suggest that targeting breeding birds to reduce aquaculture depredation is a less efficient strategy than managing birds at depredation sites on the wintering grounds. Published 2015. This article is a U.S. Government work and is in the public domain in the USA.

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Effect of Roost Harassment on Cormorant Movements and Roosting in the Delta Region of Mississippi

Cited by 21 publications

References 12 publications

Double-crested Cormorant Movements in Relation to Aquaculture in Eastern Mississippi and Western Alabama

Double-crested Cormorant Movements in Relation to Aquaculture in Eastern Mississippi and Western Alabama

Environmental Best Management Practices for Aquaculture

Aquaculture depredation by double‐crested cormorants breeding in Eastern North America

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