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 30 for “"Chick survival"”.
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Factors influencing ruffed grouse productivity and chick survival in West Virginia
I examined productivity, chick mortality, and factors influencing ruffed grouse (Bonasa umbellus) chick survival in West Virginia during 1998--1999. The proportion of hens that attempted to nest, hen success, average clutch size, and hatch dates were similar between age classes, between sites, and …
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Ruffed grouse natality, chick survival, and brood micro-habitat selection in the southern Appalachians
… may be improved in upcoming years. Ruffed grouse chick survival estimates were calculated from data collected in the first 2 years of a long term ACGRP study as well as data collected separate from ACGRP protocol. First-week chick survival estimates ranged from 0.18 to 0.32 in 1997 and 0.45 to …
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Analyses of Greater Sage-Grouse (Centrocercus urophasianus) Translocation Release Methods and Chick Survival in Strawberry Valley, Utah
… has indicated that low nest success and juvenile survival of Greater Sage-Grouse may be responsible for population declines. Recent technological advances in micro-transmitters have made radio-telemetry studies on Sage-Grouse chicks more common. Radio-telemetry enables monitoring of individual …
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Piping plover breeding biology and reproductive success on Assateague Island
… was not able to identify factors responsible for chick mortality, but my data show a relationship between chick survival and foraging habitat. Broods feeding on bayside foraging areas had a much higher survival rate than broods which did not have access to these areas. Management efforts should …
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Landscape and population ecology of ring-necked pheasants
… I monitored 108 nests, 38 broods, and the survival and habitat use of 108 adult female ring-necked pheasants (Phasianus colchicus) throughout the year between May 2014 and August 2016. My goal was to better understand how field- and landscape-scale habitat features affected stage-specific …
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Influence of Predation on Least Tern and Piping Plover Productivity Along the Missouri River in South Dakota
… yison) were having a significant effect on the survival of piping plover and least tern nests and chicks in this region. American crows, raccoons and mink were associated with 98. 0% of the known nest losses. American kestrel and great horned owl predation accounted for 93. 0% of the chick …
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Drivers of productivity in a subarctic seabird: Arctic Terns in Iceland
… in both regions, primarily because of very low chick survival rates. Low chick survival was primarily a consequence of low growth rates throughout the pre-fledging period, and the application of forensic ecology techniques showed that chick mortality occurred throughout each breeding season and …
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Population Dynamics of Threatened Piping Plovers on the Niobrara River, Nebraska
… the plover breeding season can decrease nest and chick survival. We estimated the effect of daily peak river flow on survival rates of 115 nests and 66 chicks on the Niobrara River, 2010–2016, using logistic exposure and Cormack-Jolly-Seber models, respectively. We monitored 1,874 banded …
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Piping plover population dynamics and effects of beach management practices on piping plovers at West Hampton Dunes and Westhampton Beach, New York
… nests and estimated reproductive and nest and chick survival rates. We monitored plover management efforts and determined causes of nest loss when possible. We monitored piping plover behaviors and obtained an index to plover food supply. We estimated area of plover habitats and defined areas …
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The effects of human disturbance on the seabirds and seals at sub-Antarctic Marion Island
… often over three consecutive days had the lowest chick survival. Guarding king penguins were less likely to move away during disturbance than non-breeding groups. Visit duration and approach distance affected behavioural responses. There was evidence of habituation by king penguins to current …
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Reproductive Success and Brood Habitat Use of Greater Prairie Chickens and Sharp-Tailed Grouse on the Fort Pierre National Grassland of Central South Dakota
Greater prairie chicken (Tympanuchus cupido) (PC) and sharp-tailed grouse (Tympanuchus phasianellus) (ST) ranges overlap in central South Dakota. Although the ranges of both species have been reduced during recent history, South Dakota is one of only a few states where their populations have …
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Piping plover breeding biology, foraging ecology and behavior on Assateague Island National Seashore, Maryland
… around individual nests did not increase nest survival. Chick survival was higher in bay beach and island interior brood-rearing habitats than on the ocean beach. Our evidence supports the hypothesis that the availability of adequate food is driving the differences in survival observed among …
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Piping plover habitat and demography following storm-induced and engineered landscape change
… individual locations of adults and pre-fledge chicks to evaluate effects of post-Hurricane Sandy landscape features on resource selection of adults and chicks, and behavior and survival of plover broods. We evaluated whether breeding stage (pre-breeding, nesting, brooding, post-breeding), …
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Management and Mother Nature: piping plover demography and condition in response to flooding on the Missouri River
… banded 968 adults and 2,021 piping plover chicks. We obtained 405 egg (clutch) mass measurements, 1,285 mass measurements from 633 adults, and 7,093 mass measurements from 1,996 plover chicks resulting in 3,175 mass measurements from 654 broods of chicks. We also collected 3,347 …
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Piping Plover (Charadrius melodus) demography, behavior, and movement on the Outer Banks of North Carolina
… recreation is known to reduce nest success, chick survival, and potentially fitness in other parts of the species' range. To reduce potential negative effects from human activities on breeding Piping Plovers, managers close areas to pedestrian and vehicle access using exclusion buffers …
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Behavior, Nest Site Selection and Success of Black Terns (Chlidonias niger)
… serpentina</em>) depredated an entire brood of chicks. This study is the first to document snapping turtles as a predator of Black Terns. My results provide further insight into potential factors limiting Black Tern chick survival in the Great Lakes region and the use of nest cameras to monitor …
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Greater Sage-grouse habitat and demographic response to grazing by non-native ungulates
… and sites chosen by sage-grouse to brood their chicks. When grazing was not present, sage-grouse selected nest and brood sites with higher percentages of perennial grasses, key forbs, and other forbs. When livestock were present at high rates, we detected a decline in the herbaceous understory …
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Examining skewed sex ratio in the mountain plover (Charadrius montanus) population
… for differentiation between production and survival of males and females. Early stages encompass the primary (eggs produced) ratio which allows for evaluation of applied sex allocation theory, the secondary sex ratio (successfully hatched chicks) which determines if a sex specific mortality …
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Examining skewed sex ratio in the mountain plover (Charadrius montanus) population
… for differentiation between production and survival of males and females. Early stages encompass the primary (eggs produced) ratio which allows for evaluation of applied sex allocation theory, the secondary sex ratio (successfully hatched chicks) which determines if a sex specific mortality …
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