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Showing 1 to 20 of 54 for “"Terns"”.
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Evaluating the Responses of Least Terns, Common Terns, Black Skimmers, and Gull-billed Terns to Military and Civilian Aircraft and to Human Recreation at Cape Lookout National Seashore, North Carolina
… overflights compared with control periods. Least terns reduced incubation by a mean of 12% when pedestrians were observed near nests (S = -2.2, p = 0.04). Demographic effects from overflights or recreation are unlikely given the patterns of use in this study. Least tern demographic rates were …
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Feminization in common terns (Sterna hirunda) : relationship to persistent organic contaminants
… female-female pairings among endangered roseate terns (Sterna dougallii) on Bird Island in Buzzards Bay, Massachusetts prompted studies with common terns from the same site as a surrogate species. Over seventy percent (11115) of male common tern embryos sampled from this site in 1993 had testes …
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Behavior, Nest Site Selection and Success of Black Terns (Chlidonias niger)
… monitored nest success and wetland use by Black Terns in three colony sites in northern Michigan throughout 2017 and 2018 and used traditional survey methods coupled with nest cameras to document Black Tern nest success and mortality events. Colony sites included in this study were experiencing …
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Drivers of productivity in a subarctic seabird: Arctic Terns in Iceland
… I explore the breeding demography of Arctic Terns, Sterna paradisaea, at colonies throughout the W and NE of Iceland, between 2008 and 2011. Although Arctic Tern productivity varied among colonies, it was generally low in both regions, primarily because of very low chick survival rates. Low …
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Life History Variation of Common Terns in the Gulf of Maine
… between islands in the Gulf of Maine. Common terns on offshore islands (>10km from mainland) and nearshore islands (5 to 10km from mainland) lay smaller clutches, hatching chicks with slower growth rates than common terns on inshore islands (mainland). Previous research suggests differences …
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Feminization in common terns (Sterna hirunda) : relationship to persistent organic contaminants
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Biology, 1998.
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QUANTIFYING DISTURBANCE FACTORS AND EFFECTS IN COMMON TERNS (STERNA HIRUNDO) USING VISUAL, AUDIO, AND REPRODUCTIVE DATA
… caused by recreational use, Oneida Lake's common terns are exposed to potential disturbances from tern research and cormorant management. Researchers intensively monitor tern nests during the breeding season, and USDA-APHIS participates in a lake-wide hazing program to control double-crested …
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Foraging ecology and parental care of common terns (Sterna hirundo) nesting in Windermere Basin, Lake Ontario
… This study investigated spatial and temporal patterns of foraging and chick-provisioning among 23 radio-tagged male common terns nesting at Hamilton Harbour, Lake Ontario during 1991 and 1992. Telemetry data were collected concurrently with behavioural observations from an elevated blind. Terns …
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The bioaccumulation of persistent contaminants by zebra mussels and their effects on state-endangered common terns
Common terns currently are listed as endangered or threatened in many states, including Illinois, Vermont, Pennsylvania, Ohio, Wisconsin, Michigan, and New York, and a species of special concern by the U.S. Fish and Wildlife Service (USFWS, 2002). The sole remaining nesting colony in Illinois is …
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„The spatial and temporal link between Common Terns Sterna hirundo and their prey fish in the Wadden Sea“
Der Einfluss räumlicher und zeitlicher Verteilungsmuster von Fischen auf die Reproduktion von Flussseeschwalben im Wattenmeer wurde untersucht. Langfristige Veränderungen des Bruterfolges konnten mit der Heringsabundanz in der Nordsee erklärt werden. Die Nahrungsfischdichte hatte einen größeren …
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Distribution and Productivity of Least Terns and Piping Plovers Along the Missouri and Cheyenne Rivers in South Dakota
… distribution and reproductive success of least terns and piping plovers on the Missouri and Cheyenne rivers in South Dakota. All suitable habitat was surveyed, with research concentrated on two important areas: 1) the Missouri River from Fort Randall Dam to Springfield, SD, and 2) the Missouri …
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Conservation of Least Terns and Piping Plovers Along The Missouri River and Its Major Western Tributaries in South Dakota
Interior least terns (Sterna antillarum) and piping plovers (Charadrius melodus) are listed as endangered or threatened over all of their breeding range, including South Dakota (SD). Investigations were made into the status, distribution, production, habitat characteristics, and factors limiting …
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Nest-site selection, nocturnal nest desertion, and productivity in a common tern (<i>sterna hirundo</i>) colony at Detroit River, Michigan
<p>Common terns are declining in the Great Lakes region and represent a population relatively distinct from that of eastern North America. On an artificial site, I studied the substrate and vegetation preference and productivity of nesting terns at two scales: general habitat and nest-site. Terns …
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Distribution, Productivity, and Habitat Use by Interior Least Terns and Piping Plovers on the Niobrara River in Northern Nebraska, 1996-1997
Interior least terns (Sterna antillarum athalassos) and piping plovers (Charadrius melodus) are endangered and threatened species, respectively, and have been protected under the Endangered Species Act since 1985. Dam building on the Missouri River has produced changes in the availability and …
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Sandbars managed for least terns within the Missouri River: evaluating the influence of fish, spatial scale and environment on habitat use
Interior Least Terns (Sternula antillarum) nest on barren sandy habitats, typically sandbars and shorelines within large river systems of the central United States. Loss of natural ecosystem processes which create and maintain these habitats is considered the primary reason for population decline …
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Investigating the foraging ecology and energy requirements of a seabird population increasing in an intensely exploited marine environment
… plasticity for this seabird. Greater crested terns rely mainly on anchovy Engraulis encrasicolus (65%), which averaged 84 mm long. Prey composition differed significantly between breeding stages, with anchovy especially dominant at the onset of the breeding period and the diet becoming more …
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Towards a conservation strategy of the Roseate tern Sterna dougallii in the Azores Archipelago
… the factors underlying the decision of Roseate Terns to breed or not in a given year in the archipelago. Nevertheless this lack of a complete understanding of a perhaps natural variation does not prevent implementation of immediate conservation action. This thesis examines the impact of avian …
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Parental care in the common tern (Sterna Nirundo): sexual roles in a monogamous seabird
The parental behaviour of male and female Common Terns (Sterna hirundo) was documented throughout two breeding seasons at a colony near Port Colborne , Ontario. Thirteen and fourteen pairs of terns were chosen for intensive study in 1982 and 1983, respectively. The delivery of fish by males to …
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Modelling growth patterns of bird species using non-linear mixed effects models
… in Gauteng province, South Africa, and for Swift Terns on Robben Island were taken. Different methods such as polynomial regressions, non-parametric models and non-linear mixed effects models have been used to fit models to growth data. In recent years, non-linear mixed effects models have become …
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