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.
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Showing 1 to 20 of 54 for “"breeding biology"”.
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Breeding Biology of the Sage Thrasher
… was placed on the behavioral aspects of the breeding biology.
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Breeding Biology of Cassin’s Finch, Carpodacus Cassinii
… Field studies were conducted throughout the breeding season, and efforts were made to determine whether or not sub-adult males were successful in acquiring mates. In conjunction with consideration of the function of delayed plumage development in males of this species, a general review of …
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The Breeding Biology of the Mountain Chickadee (Parus Gambeli)
The breeding biology of the Mountain Chickadee (Parus gambeli) was studied in 1968, 1969, 1970 in the Robinson Canyon, 13 miles west of Ellensburg, Kittitas County, Washington.
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Piping plover breeding biology and reproductive success on Assateague Island
… on Assateague Island during the 1986 and 1987 breeding seasons. In 1987, I estimated the population to be 69 pairs. During both years, plovers nested on only a few portions of the island. I think that this pattern of nesting was determined by the distribution of three types of foraging …
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Further studies on the breeding biology of redshank (Tringa totanus L.)
Redshank breeding biology is examined and reviewed in relation to other sandpiper studies. "Primarily, general aspects are described. The mean clutch size was 3.82 eggs. Fourth eggs laid were significantly smaller and more likely to hatch last. Nest hatching success varied annually from 30-741, …
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Breeding Biology and Prey Selection of Ferruginous Hawks in Northwestern South Dakota
A study of the breeding biology and prey selection of ferruginous hawks (Buteo regalis) was conducted in northwestern South Dakota during 1976 and 1977. Twenty four pairs were located in 1976 and 18 pairs attempted to nest; 17 pairs located in 1977 attempted to nest. The ecological density of …
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Nest Site Characteristics and Breeding Biology of Flammmulated Owls in Missoula Valley
… Spring 2011 Environmental Studies Nest Sites and Breeding Biology of Flammulated Owls in Missoula Valley Chairperson: Len Broberg The Flammulated Owl is listed as a sensitive or species of concern with United States Forest Service, Bureau of Land Management, and Montana Fish, Wildlife and Parks. …
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Nest Site Characteristics and Breeding Biology of Flammmulated Owls in Missoula Valley
… Spring 2011 Environmental Studies Nest Sites and Breeding Biology of Flammulated Owls in Missoula Valley Chairperson: Len Broberg The Flammulated Owl is listed as a sensitive or species of concern with United States Forest Service, Bureau of Land Management, and Montana Fish, Wildlife and Parks. …
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The breeding biology of Eudyptes penguins with particular reference to egg-size dimorphism
The breeding biology of Macaroni Penguins Eudyptes chrysolophus and of Rockhopper Penguins E. chrysocome was studied at Marion Island (46°54'8, 37°45'E) in the austral summers of 1974-75 and 1976-77. The clutch comprises two eggs, the first-laid (A-) egg being markedly smaller than the second-laid …
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Multiple paternity and the breeding biology of the red-eyed treefrog, Agalychnis callidryas
… matings involving a female with two males. The breeding biology of females and the potential costs and benefits of mating with multiple males were examined. Females were found to decrease the number of eggs in matings with multiple males. In addition, amplexed females moving toward Oviposition …
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Breeding Biology of Wilson's Plovers (Charadrius Wilsonia): Reproductive Success, Habitat Use, and Sex Roles
… reproductive success rates and how a breeding pair achieves nest success is vital information needed for management of declining populations. Wilson’s Plover, a species of concern in most of the southeastern United States, has low hatching success on Cumberland Island National …
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Piping plover breeding biology, foraging ecology and behavior on Assateague Island National Seashore, Maryland
… Seashore, Maryland, during the 1988-1990 breeding seasons. The estimated breeding population declined from 25 pairs in 1988 to 14 pairs in 1990. Nest predation by red foxes (Vulpes vulpes) was high. Predator exclosures constructed around individual nests did not increase nest survival. …
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Comparative breeding biology of the Northern Rockhopper penguin Eudyptes moseleyi on Gough and Nightingale Islands
… Endangered due to an estimated 57% decrease in breeding numbers over the past 37 years. Approximately 85% of the global population breeds at the Tristan da Cunha archipelago (Tristan, Inaccessible and Nightingale Islands) and nearby Gough Island in the central South Atlantic Ocean. The …
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Breeding Biology Of Chuck-Will's-Widows: Incubation, Brooding, And Provisioning Behavior And Characteristics Of Nest Sites
… known about their behavior, particularly their breeding and nesting behavior. Thus, my objectives were to: (1) quantify patterns of incubation behavior (e.g., on bouts vs. off bouts) and the respective roles of males and females, (2) quantify the brooding and provisioning behavior of males and …
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Breeding Biology of Red-winged Blackbirds (Agelaius phoeniceus) in Stormwater Retention Ponds on the College at Brockport Campus
… in stormwater retention ponds. I studied the breeding biology of the species in seven small retention ponds at the College at Brockport, to evaluate their breeding success in a created habitat relative to data from studies in natural habitats. I also determined how habitat characteristics …
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The breeding biology and ecology of the White-necked Picathartes <i>Picathartes gymnocephalus</i> temminck 1825, in Sierra Leone
… a significant role. A substantial number of non-breeding birds were apparently present in populations and infanticidal behaviour may have been a consequence of competition for limited nest sites. Population density was estimated as 0.37 individuals km-' and the total population in Sierra Leone as …
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Breeding biology, mating system and population dynamics of the Lesser Spotted Woodepcker (Picoides minor) : combining empirical and model investigations
… of species is one major focus in conservation biology. The basis for any management concept is the knowledge of the species autecology. In my thesis, I studied the life-history traits and population dynamics of the endangered Lesser Spotted Woodpecker (Picoides minor) in Central Europe. Here, I …
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