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Showing 1 to 8 of 8 for “"Larus argentatus"”.
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The Effects of Diet and Predation on Nesting Herring Gulls (Larus argentatus) in Pukaskwa National Park
Herring gulls (Larus argentatus) are used as ecological indicators of the coastal Lake Superior ecosystem in Pukaskwa National Park. Their populations have declined by 70% over the last 40 years, suggesting changes in the park ecosystem. I assessed herring gull diets and investigated how diet may …
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Foraging habits, population changes, and gull-human interactions in an urban population of Herring Gulls (Larus argentatus) and Lesser Black-backed Gulls (Larus fuscus)
… The main urban colonists are Herring gulls (HG; Larus argentatus) and Lesser Black-backed gulls (LB; Larus fuscus). In some urban areas, they are considered a nuisance, although overall gull numbers are declining, and all breeding gulls in Britain are protected by law. Objectives: To determine …
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Immunological and hematological biomarkers for contaminants in fish-eating birds of the Great Lakes
… immunocompetence in Great Lakes herring gulls (Larus argentatus) and Caspian terns (Sterna caspia). It also evaluated the use of various immunological tests as biomarkers for contaminant-associated health effects in wild birds. Masses of immune organs and WBC counts were assessed in herring gull …
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Nest site selection by common eiders : relationships with habitat features, microclimate and incubation success
… Active nest sites were closer to herring gull (Larus argentatus) nests, farther from the ocean and had organic substrates. In general, habitat features associated with nest use were not strongly associated with success after the onset of incubation. Nests near fresh water ponds were more …
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An empirical and theoretical investigation of kleptoparasitic foraging behaviour in mixed-species aggregations of gulls (Laridae)
… focal species were the Great black-backed gull (Larus marinus), Herring gull (Larus argentatus), Black-headed gull (Chroicocephalus ridibundus), and Common gull (Larus canus), these species forage together but differ in size and competitive ability. Foraging at the sites was recorded and analysed …
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PCB Effects on Brain Type II 5'Deiodinase Activity in Developing Brids
… PCB congener (PCB-126) and (2) herring gull (Larus argentatus) embryos and pre-fledglings from Great Lakes sites with different chemical pollutant exposures. Specifically, PCB effects on thyroid status were evaluated by measuring plasma thyroid hormone concentrations and brain type II 5'D …
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Effects of Herring Gulls and Great Black-backed Gulls on Breeding Piping Plovers, South Monomoy Island, Massachusetts
The large population of breeding Herring Gulls and Great Black-backed Gulls on South Monomoy Island, Cape Cod, Massachusetts has been thought to negatively affect the breeding success of the threatened Piping Plover. Following the Piping Plover Recovery Plan s call for gull colonies to be removed …