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Showing 1 to 20 of 21 for “"Sterna"”.
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Feminization in common terns (Sterna hirunda) : relationship to persistent organic contaminants
… 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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The Swift Tern Sterna bergii in Southern Africa : growth and movement
Inlcudes bibliographical references.
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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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Towards a conservation strategy of the Roseate tern Sterna dougallii in the Azores Archipelago
The Roseate Tern, Sterna dougallii, is currently regarded as one of the most endangered seabirds in Europe. The mid-Atlantic Azores islands, Portugal, are an important breeding ground for this species, holding more than 50 per cent of the European population. EU directives are aimed at maintaining …
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Parental care in the common tern (Sterna Nirundo): sexual roles in a monogamous seabird
… 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 their …
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QUANTIFYING DISTURBANCE FACTORS AND EFFECTS IN COMMON TERNS (STERNA HIRUNDO) USING VISUAL, AUDIO, AND REPRODUCTIVE DATA
The common tern is designated as a species of special concern in Upstate New York. The largest inland tern colony in New York is located on Oneida Lake, which is habitat to many other colonial waterbird species and an area of high human use during the tern breeding season. In addition to …
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Foraging ecology and parental care of common terns (Sterna hirundo) nesting in Windermere Basin, Lake Ontario
The relationships among chick feeding, size and type of prey item, and foraging time away from the brood have not been well studied in seabirds. This study investigated spatial and temporal patterns of foraging and chick-provisioning among 23 radio-tagged male common terns nesting at Hamilton …
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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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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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The biology and conservation of the Damara Tern in Namibia
The globally Near-threatened Damara Tern Sterna balaenarum is little known and faces several conservation issues. The aim of this study was to provide a description of the ecology and numbers of the species and discuss conservation management plans that will effectively ensure its survival.
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Life History Variation of Common Terns in the Gulf of Maine
… conditions.</p> <p>Common tern (<em>Sterna hirundo</em>) life history phenotypes vary 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 …
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Floating seaweed as ephemeral neustonic habitat
… shift towards surface pecking and dipping in Sterna hirundo. The association behaviour of the encountered species and their (optimal) use of the transient resources offered by floating seaweeds potentially have important ecological consequences, like for example the passive dispersal of …
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Influence of Predation on Least Tern and Piping Plover Productivity Along the Missouri River in South Dakota
… plover (Charadrius melodus) and least tern (Sterna antillarum) productivity. Egested raptor pellet collections, track surveys, time-lapse photography, and site observations indicated that American kestrels (Falco sparyerius), American crows (Corvus brachyrhynchos), raccoons (Procyon lotor), …
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Drivers of productivity in a subarctic seabird: Arctic Terns in Iceland
… 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 chick …
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A contribution to the knowledge of the odonata
… transfer to and from male anterior abdominal sterna be accidental. In contrast, assuming an original indirect transfer of sperm leads to a copulatory sequence similar to that of the Odonata. The proposed scenario differs from others in that extraordinary postures are not envisioned, the …
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Fuglafána Vatnshamravatns í Borgarfirði.
… cygnus), stokkönd (Anas platyrhynchos), kría (sterna paradisaea), hettumáfur (Larus ridibundus), svartbakur (Larus marinus) og stelkur (Tringa totanus). Álft var auk þess eina tegundin sem sást í öll talningarskiptin en tólf tegundir sáust aðeins einu sinni á talningartímabilinu. Nauðsynlegt …
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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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Potential Interaction Analysis of Offshore Wind Energy Areas and Breeding Avian Species on the US Mid-Atlantic Coast
… collected GPS location data on common terns (<em>Sterna hirundo</em>) at Dawson Shoals, Virginia during their 2017 nesting season. We analyzed their movement and behavior in relation to offshore wind sites. We determined that common terns most often utilized an area roughly half the size of the …
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Immunological and hematological biomarkers for contaminants in fish-eating birds of the Great Lakes
… 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 chicks at 11 colonies and adults at …
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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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