Cormorant<i>Phalacrocorax carbo</i>occupancy and impact at stillwater game fisheries in England and Wales

Callaghan, Des A.; Kirby, J S; Bell, Mike; Spray, Chris

doi:10.1080/00063659809461074

Cited by 9 publications

(12 citation statements)

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“…In fact, in the central part of the surveyed area (bordered by the Bug and San rivers), which lacks large natural lakes, all cormorant nest colonies have been abandoned since 2000 due to persecution (Tomiałojć and Stawarczyk 2003). Also, cormorants were more likely to cause significant losses to the larger farms, typically including large ponds, which offered more safety to foraging birds (Callaghan et al 1998). No specific characteristics predisposing fish farms to otter and heron depredation were detected, presumably because the two species were so widespread.…”

Section: Discussionmentioning

confidence: 96%

“…The latter apparently provided flyways and source habitats for cormorants, while at fish farms the birds were intensely persecuted (cf. Callaghan et al 1998). In fact, in the central part of the surveyed area (bordered by the Bug and San rivers), which lacks large natural lakes, all cormorant nest colonies have been abandoned since 2000 due to persecution (Tomiałojć and Stawarczyk 2003).…”

Section: Discussionmentioning

confidence: 99%

“…Biases associated with respondents' attempts to impress the interviewer (e.g., about the levels of wildlife damage) are likely to be lower than in face-to-face meetings (Brace 2004). Also, postal surveys on wildlife typically have low response rates (Carss 1994;Callaghan et al 1998) and risk the nonresponse bias occurring when persons more interested in the issues covered by the survey are more likely to respond (McKinstry and Anderson 1999;Conover 2001). The interview design was pilot-tested in spring of 2003 in a survey of 40 farms focusing on the impact of otters at farmed fisheries in south-eastern Poland.…”

Section: Study Area and Methodsmentioning

confidence: 99%

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Human–wildlife conflicts at pond fisheries in eastern Poland: perceptions and management of wildlife damage

Kloskowski¹

2010

Eur J Wildl Res

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Wildlife occurring at aquacultural sites can ignite conflicts over resources managed by humans. A telephone survey concerning nuisance wildlife occurrence, perceptions of inflicted damage, and use of preventive measures at pond fisheries was conducted in 2003-2004 in eastern Poland. Significant economic losses to wildlife were reported by 80% of the respondents, with 41% claiming severe losses to more than one species. Serious damage was attributed primarily to otters Lutra lutra (56% of farms), cormorants Phalacrocorax carbo (26%), grey herons Ardea cinerea (23%), and beavers Castor fiber (21%). Two alien species, mink Neovison vison and muskrat Ondatra zibethicus, were widespread, but rarely blamed for causing substantial harm. Lethal controls were the most popular means of damage reduction and were more likely to be deployed at fish farms reporting significant losses. Cormorants, shot at half of the farms visited, were the most widely persecuted. Both otters and beavers were culled, notwithstanding their protection status and compensation payments available for beaver damage to ponds. The survey indicated poor cooperation between conservation authorities and fish farmers in managing wildlife concerns. Monitoring conflict interactions, i.e., wildlife occurrence and alleged damage at fish farms vs damage management processes, is an essential step toward conflict alleviation. Considering the wide range of species interacting with fisheries, adoption of more flexible policies to address the conflicts than a singlespecies conservation approach is recommended.

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Section: Discussionmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 99%

Section: Study Area and Methodsmentioning

confidence: 99%

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Human–wildlife conflicts at pond fisheries in eastern Poland: perceptions and management of wildlife damage

Kloskowski¹

2010

Eur J Wildl Res

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“…1996). This pattern appears to be due largely to seasonal movement of cormorants from predominantly marine breeding areas into freshwater wintering areas (MacDonald 1987; Callaghan, Kirby & Bell 1994; Kirby, Gilburn & Sellers 1995; Kirby, Holmes & Sellers 1996; Russell et al . 1996) but probably also to the arrival of some birds from continental breeding areas to winter in England (van Eerden & Munstermann 1995; Kirby, Gilburn & Sellers 1995; Russell et al .…”

Section: Introductionmentioning

confidence: 99%

“…1996). Cormorants show a habitat preference for large lowland freshwater bodies, so their predation particularly concerns freshwater fishery managers and anglers in southern England (Callaghan, Kirby & Bell 1994).…”

Section: Introductionmentioning

confidence: 99%

Stable isotopes indicate the extent of freshwater feeding by cormorants Phalacrocorax carbo shot at inland fisheries in England

Bearhop

Thompson

Waldron

et al. 1999

Journal of Applied Ecology

142

101

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Summary 0[ The numbers of cormorants Phalacrocorax carbo feeding at English freshwater _sheries during winter have increased rapidly over the last 19 years\ causing concern among _shery managers and anglers[ 1[ In order to assess the extent of freshwater feeding\ stable isotope ratios of carbon and nitrogen "d 02 C and d04 N# in feathers of wild cormorants from inland freshwater _sheries were compared with those in the feathers of piscivorous birds with marine diets "captive {marine!fed| cormorants\ free!ranging shags Phalacrocorax aristotelis# and freshwater diets "juvenile goosanders Mergus merganser#[ 2[ Isotope signatures of feathers represent the diet at the time of growth[ Feathers grown at di}erent times of the year were taken from wild cormorants^each feather type therefore represented the diet over a di}erent temporal scale[ 3[ Isotopic analyses of feathers indicated that\ when shot\ nearly all of the cormorants had been feeding entirely on freshwater prey[ The mean d 02 C value of primary feathers growing when birds were shot was Ð11=1-\ indicative of an entirely freshwater diet[ 4[ The move to freshwater habitats from coastal breeding grounds occurred over several months\ but once established cormorants appear to have fed at freshwater sites throughout the autumn and winter[ 5[ The suitability of using a two!source isotopic mixing model in order to quantify the extent of freshwater feeding in piscivorous birds is discussed[ 6[ Although the results indicate long!term residency and feeding in freshwater systems\ they do not indicate whether birds were feeding regularly at the sites at which they were shot\ or the composition of the diet[ It is recommended that further studies using telemetry and multiple isotope analyses be carried out in order to address these issues[ Key!words] carbon!02\ feather\ fractionation factor\ mixing model\ nitrogen!04[

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An Assessment of Anthropogenic Activities on and Rehabilitation of River Fisheries: Current State and Future Direction

Lucas

Marmulla²

2000

Management and Ecology of River Fisheries

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CormorantPhalacrocorax carbooccupancy and impact at stillwater game fisheries in England and Wales

Cited by 9 publications

References 5 publications

Human–wildlife conflicts at pond fisheries in eastern Poland: perceptions and management of wildlife damage

Human–wildlife conflicts at pond fisheries in eastern Poland: perceptions and management of wildlife damage

Stable isotopes indicate the extent of freshwater feeding by cormorants Phalacrocorax carbo shot at inland fisheries in England

An Assessment of Anthropogenic Activities on and Rehabilitation of River Fisheries: Current State and Future Direction

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