Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 16 of 16 for “"Birds--Breeding"”.
-
Effects of Plant Invasions on Birds Breeding In Desert Grasslands
… species, including grassland birds, which have declined more rapidly across North America than any other group of birds. Along gradients in cover of woody plants and nonnative grasses in semidesert grasslands of southeastern Arizona, we evaluated how these plant invasions …
-
Reproduction of coastal birds breeding in the Wadden Sea: variation, influencing factors and monitoring
The study was aimed to determine breeding success including its variability of coastal birds breeding in the Wadden Sea. A further aim was to assess the contribution of current breeding success to population trends of single species. The studies were conducted during the mid 1990s and at the …
-
Penguins and purse-seiners : competition or co-existence?
… with a sail boat in waters close to the birds' breeding islands. The use of a sail boat permitted close observation of foraging penguins with minimal disturbance. Penguin numbers at sea were lowest in December, when birds were confined to the breeding islands during moulting and were high …
-
Telemetric determination of movements and behavior of released pheasants
Two releases of 50 birds each were made on the Virginia Polytechnic Institute and State University Farm. One release was made in the fall, the other release was made in the spring. The birds were a cross between Western Iranian black-necked (Phasianus colchicus talischensis) and Chinese ring-necked …
-
Migratory connectivity and differential patterns of decline in Barn Swallow (Hirundo rustica) in North America: Potential effects of factors on breeding and wintering grounds
… migrant and an aerial insectivore whose breeding populations have declined drastically in northern regions of North America but remain stable in certain areas of the southern United States. However, reasons for differential population trends and whether factors on breeding and/or …
-
Habitat Relationships of Breeding Birds in Bottomland Hardwood Forests of the Altamaha River, Georgia
… provide habitat for at least seventy species of breeding birds. However, little is known about habitat associations of breeding birds, specifically within mature, closed-canopy bottomlands. It is often assumed that once bottomlands become mature, closed-canopy forests, that they are essentially …
-
The ecology of the Manx shearwater Puffinus Puffinus on Rhum, West Scotland
… of predation and other extrinsic factors upon breeding success and population dynamics. Brown rats were not found to be active predators of shearwaters on Rhum. Few rats were present in the shearwater colony during the birds' breeding seasons, but larger numbers scavenged on the remains of …
-
An Experimental Study of Behavioral Responses to Nest Predation and Brood Parasitism in a Migratory Songbird
We expect birds to evolve life history traits that maximize lifetime reproductive success and that these traits will include behavioral responses to factors limiting reproductive success. These behavioral responses may be especially important for birds breeding in highly fragmented landscapes where …
-
Demography and Behavior of Western Sandpipers (Calidris mauri) Breeding on the Yukon-Kuskokwim River Delta, Alaska
… studies of Western Sandpipers (Calidris mauri) breeding on the Yukon-Kuskokwim River Delta, Alaska (1998-2005). In chapter one, I estimated apparent annual survival (product of true survival and site fidelity) while correcting for the probability of encounter for 237 males and 296 females. …
-
The reintroduction of the Aldabra rail Dryolimnas cuvieri aldabranus to Picard Island, Aldabra Atoll
… Aldabra Rails in the field. All 18 remaining birds were released on Picard and survived beyond the first breeding season. Eight pairs had bonded and successfully reared a minimum of 13 chicks within five months of release. Eleven monitored pairs reared 20 chicks in 2000/2001, with one-year-old …
-
White storks (Ciconia ciconia) of Eastern Germany: age-dependent breeding ability, and age- and density-dependent effects on dispersal behavior
… In this thesis, I first present age-dependent breeding ability and natal site fidelity in white storks (Ciconia ciconia); migratory birds breeding in large parts of Europe. I predicted that both the proportion of breeding birds and natal site fidelity increase with the age. After the seventies …
-
A study of avian nest predation at Audubon Acres in Chattanooga, TN
… mortality among North American migratory land birds. High rates of nest predation can jeopardize avian reproductive biology by affecting life histories and habitat selection. Artificial nests are commonly used to study nest predation because they allow the researcher to investigate comparative …
-
Post-breeding public information use in a ground-nesting songbird community
… that can strongly affect their fitness. For birds, the territory an individual chooses to breed in can have large and direct effects on their reproductive success. Birds can assess territory quality to make settlement decisions by using information obtained from social cues emitted by other …
-
ΒΙΟΛΟΓΙΑ ΚΑΙ ΟΙΚΟΛΟΓΙΚΗ ΣΥΜΠΕΡΙΦΟΡΑ ΤΟΥ ΛΕΥΚΟΤΣΙΚΝΙΑ (EGRETTA GARZETTA) ΣΤΗΝ ΤΕΧΝΗΤΗ ΛΙΜΝΗ ΚΕΡΚΙΝΗΣ ΣΕΡΡΩΝ
… SERRES, FROM MARCH 1988 UNTIL MARCH 1990. THE BREEDING AND FORAGING BIOLOGY OF THE LITTLE EGRET (EGRETTA GARZETTA) WAS STUDIED AS WELL AS THE BEHAVIORAL ECOLOGY OF THE ABOVE SPECIES ACCORDING TO THE SEASONAL FLUCTUATION OF THE WATER LEVEL DURING THE CRUCIALTIME OF BREEDING. THE SEASONAL …