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Articles 91 - 103 of 103
Full-Text Articles in Life Sciences
Reproductive Ecology Of The Burrowing Owl, Athene Cunicularia Floridana, In Dade And Broward Counties, Florida, Brian Keith Mealey
Reproductive Ecology Of The Burrowing Owl, Athene Cunicularia Floridana, In Dade And Broward Counties, Florida, Brian Keith Mealey
FIU Electronic Theses and Dissertations
From 1988 to 1990 a study of the reproductive ecology of the burrowing owl was conducted to determine seasonality and reproductive success in Dade and Broward Counties. Reproductive data for each of the three years (1988- 1990) reveal a higher reproductive success rate (54%) for 1990 than 1989 (40%) and 1988 (40%). Owls using previously used burrows had a higher success in fledging young (63%) than newly excavated burrows (19%). T-tests were conducted on several appendage measurements of male and female owls to determine sexual dimorphic traits. Metatarsus lengths of males and females were different (t=2.36, p=0.02). As of 1990,197 …
Population Ecology Of The Bald Eagle (Haliaeetus Leucocephalus) In Florida Bay, Everglades National Park, Florida, 1959-1990, John L. Curnutt
Population Ecology Of The Bald Eagle (Haliaeetus Leucocephalus) In Florida Bay, Everglades National Park, Florida, 1959-1990, John L. Curnutt
FIU Electronic Theses and Dissertations
Using aerial census techniques, I collected data on the population, reproduction and nesting habits of Bald Eagles in Florida Bay, Florida, for three consecutive breeding seasons (Oct - Mar, 1987 - 1990). For analysis I consolidated my data with those collected by Robertson et al. between 1959 and 1986 for a total of 26 seasons. The breeding population of Bald Eagles in Florida Bay has been stable since censuses began in 1959. However, numbers of subadult eagles in Florida Bay have declined sharply since the early 1960’s. Breeding density was apparently limited by territoriality. Nesting success was positively correlated …
Bird Use Of Lakes In The Claremont-Upland Area, Valerie Banschbach
Bird Use Of Lakes In The Claremont-Upland Area, Valerie Banschbach
Pomona Senior Theses
I studied water bird use of two lakes in the Claremont-Upland area to determine what physical, chemical, and biological aspects of these lakes provide suitable water bird habitat and food resources. I censused the Bernard Field Station Lake in Claremont and a gravel pit freshwater area in Upland from 10/85 to 3/86 for water bird use. I also mapped these sites, noted their water surface area and water depth changes, monitored their water chemistry, and censused their vegetation. The results of this work showed more total water birds per hour of observation time, and more birds per hour of observation …
Functional Aspects Of Renal Glomeruli Based On Scanning Electron Microscopy Of Corrosion Casts, With Special Emphasis On Reptiles And Birds, H. Ditrich, H. Splechtna
Functional Aspects Of Renal Glomeruli Based On Scanning Electron Microscopy Of Corrosion Casts, With Special Emphasis On Reptiles And Birds, H. Ditrich, H. Splechtna
Scanning Electron Microscopy
The glomerular complexity of several species of birds and reptiles is investigated in this study by scanning electron microscopy of vascular corrosion casts. Comparing these results with those of a freshwater teleost and a mammalian species, a trend towards small, simple glomeruli of the avian type, beginning with large, well vascularized glomeruli resembling the type found in fish, can be observed in reptiles.
A close correlation between glomerular size and habitat can be established comparing related species having a similar physiological mode of renal function.
Entirely different from this sauropsidian evolutionary line of development is the highly complex, large differentiation …
Ua66/6 Brigadoon Nature Preserve Survey Phase I, Wayne Mason, Jeff Jenkins, Kenneth Nicely, Herbert Shadowen
Ua66/6 Brigadoon Nature Preserve Survey Phase I, Wayne Mason, Jeff Jenkins, Kenneth Nicely, Herbert Shadowen
WKU Archives Records
A preliminary report of an ongoing survey on the mammals, birds, vascular plants, and fungi that have been recorded at the Brigadoon Nature Preserve from November, 1983 - September, 1984.
The Influence Of Livestock Feed Size On Feed Consumption By Starlings (Sturnus Vulgaris), Daniel Twedt
The Influence Of Livestock Feed Size On Feed Consumption By Starlings (Sturnus Vulgaris), Daniel Twedt
Masters Theses & Specialist Projects
Ground meal and 4 sizes of pelleted feeds (3/16, ¼, 3/8 and ½ inch diameters) were offered to captive Starlings (Sturnus vulgaris, Linnaeus) to determine the minimum feed size they were unable to consume in significant amounts. The ground meal, 3/8 and ½ inch diameter pellets substantially decreased feed consumption compared with 3/16 and ¼ inch diameter pellets. Additionally, ½ inch pellets were consumed substantially less than ground meal or 3/8 inch pellets. Supplemental feed was require to prevent mortality among Starlings offered only ½ inch pellets.
Two pellet sizes, the 3/16 inch pellet which was readily consumed by …
Sunset As An Orientational Cue For A Nocturnal Migrant, The White-Throated Sparrow (Zonotrichia Albicollis), James Pauly
Sunset As An Orientational Cue For A Nocturnal Migrant, The White-Throated Sparrow (Zonotrichia Albicollis), James Pauly
Masters Theses & Specialist Projects
The possibility that nocturnal migrants use sunset as an orientational cue was explored in the White-throated Sparrow (Zonotrichia albicollis) between 1 April and 24 April, 1981. Orientation tests were run on the roof of the biology building at Western Kentucky University when birds were assumed to be in the proper physiological condition for migration. Birds exposed to only nighttime skies, birds isolated from all visual cues, and birds exposed to both daytime and nighttime skies did not exhibit the northward directional preference appropriate for the season tested. However, White-throated Sparrows exposed only to sunset and tested in the absence …
Bulletin No. 27: Birds Of Connecticut Salt Marshes - 50th Anniversary, James Stone, J. Susan Cole-Stone, William A. Niering
Bulletin No. 27: Birds Of Connecticut Salt Marshes - 50th Anniversary, James Stone, J. Susan Cole-Stone, William A. Niering
Bulletins
48 pp. 1981. Illustrations and descriptions of 24 birds commonly seen on our tidal marshes.
A Comparative Study Of Growth And Survival In Nestling Mockingbirds And Brown Thrashers, Bette J. Schardien
A Comparative Study Of Growth And Survival In Nestling Mockingbirds And Brown Thrashers, Bette J. Schardien
Retrospective Theses and Dissertations
No abstract provided.
Reproductive Parameters For Nine Avian Species At Moore Creek, Merritt Island National Wildlife Refuge, G. Tanner Girard
Reproductive Parameters For Nine Avian Species At Moore Creek, Merritt Island National Wildlife Refuge, G. Tanner Girard
Retrospective Theses and Dissertations
No abstract provided.
The Evolution Of Alarm Calls: Altruism Or Manipulation?, Eric Charnov, John R. Krebs
The Evolution Of Alarm Calls: Altruism Or Manipulation?, Eric Charnov, John R. Krebs
Biology Faculty & Staff Publications
No abstract provided.
On Clutch Size And Fitness., Eric Charnov, John R. Krebs
On Clutch Size And Fitness., Eric Charnov, John R. Krebs
Biology Faculty & Staff Publications
No abstract provided.
Blood Oxygen Capacity Of Birds, J. R. Powell
Blood Oxygen Capacity Of Birds, J. R. Powell
Master's Theses
Avian blood oxygen capacity (BOC: Vol. %) was measured by a modified Roughton - Scholander syringe method with regard to parameters of body weight and sex. Two samples, collected from the Richmond vicinity, were investigated: the domestic pigeon (Columba livia Gmelin) and 25 other bird species.