Download or read book Foraging Ecology and Body Condition of Migrant Semipalmated Sandpipers Calidris Pusilla on Three Mudflats in the Bay of Fundy Hemispheric Shorebird Reserve Nova Scotia written by Kimberley Mawhinney Gilliland and published by . This book was released on 1992 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS)* at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dis semination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the though that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volumes were handled by an international publishing house to assure improved service and broader dissemi nation. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 37 (thesis year 1992) a total of 12,549 thesis titles from 25 Canadian and 153 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this impor tant annual reference work. While Volume 37 reports theses submitted in 1992, on occasion, certain uni versities do report theses submitted in previous years but not reported at the time.
Download or read book Wildlife Review written by and published by . This book was released on 1993 with total page 750 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Changes in Sediment Types and Invertebrate Fauna in the Intertidal Mudflats of the Bay of Fundy Between 1977 and 1994 written by Philippa C. F. Shepherd and published by Sackville, N.B. : Canadian Wildlife Service. This book was released on 1995 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: "In 1977-1979, ten intertidal mudflats in Minas Basin and Chignecto Bay were studied to determine the invertebrate species composition and species' abundances on each flat as well as differences in sediment types (substrate particle sizes) which might account for the variations found between the mudflats. The same investigations were carried out in 1994 and the findings were compared to the results obtained in 1977-1979 in order to confirm qualitative observations that considerable changes had occured in substrate types which might be associated with observed reductions in invertebrate abundances"--Abstract.
Download or read book Masters Theses in the Pure and Applied Sciences written by W. H. Shafer and published by Springer Science & Business Media. This book was released on 1994 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume 37 (thesis year 1992) reports a total of 12,549 thesis titles from 25 Canadian and 153 US universities (theses submitted in previous years but only now reported are indicated by the thesis year shown in parenthesis). The organization, like that of past years, consists of thesis titles arrange
Download or read book Natural History of Nova Scotia Topics and habitats written by Derek S. Davis and published by [Halifax, N.S.] : Nova Scotia Museum. This book was released on 1996 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: Produced in joint with the Dapartmant of lands and Forests. The history of Nova Scotia.
Download or read book Aspects of the Foraging Ecology of the Semipalmated Sandpiper Calidris Pusilla L in Relation to Its Major Prey Corophium Volutator Palius on the Grande Anse Mudflat Upper Bay of Fundy written by Ian Hamilton and published by . This book was released on 1983 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Comparative Study of the Foraging Ecology of the Semipalmated Sandpiper Calidris Pusilla in the Bay of Fundy in 1982 and 2004 Before and After the Reintroduction of the Peregrine Falcon Falco Peregrinus written by Nadia Tymczyszyn and published by . This book was released on 2005 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flexibility in Foraging Behaviour and Use of Alternate Food Sources by Semipalmated Sandpipers Calidris Pusilla During Migratory Stopover in the Upper Bay of Fundy written by Matthew Garfield Ginn and published by . This book was released on 2009 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Diurnal and Nocturnal Foraging Activities of Semipalmated Sandpipers Calidris Pusilla in the Upper Bay of Fundy written by Melissa Annik Hebert and published by . This book was released on 2011 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dietary Flexibility and Diurnal and Nocturnal Foraging Behaviour of Semipalmated Sandpipers Calidris Pusilla in the Upper Bay of Fundy Canada written by Jenna T. Quinn and published by . This book was released on 2011 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Factors Influencing Broad and Fine Scale Habitat Use and Foraging Behaviour of the Semipalmated Sandpiper Calidris Pusilla in the Bay of Fundy written by Colin Bran Alexander Macfarlane and published by . This book was released on 2010 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stopover Ecology of Semipalmated Sandpipers calidris Pusilla During Fall Migration Through the Upper Bay of Fundy Canada written by Sarah G. Neima and published by . This book was released on 2016 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Foraging Semipalmated Sandpipers Calidris Pusilla L and Their Major Prey Corophium Volutator Pallas on the Starrs Point Mudflat Minas Basin written by John Sherman Boates and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Semipalmated Sandpipers, Calidris pusilla (L.) and their predominant prey, the amphipod Corophium volutator (Pallas) were studied on a macrotidal mudflat ( 6 km2 ) at Starrs Point (45o08'N, 64o22'W), Minas Basin during summer in 1978, 1979 and 1980. The sandpipers stop in this area and store energy prior to a presumed non-stop flight to wintering areas as distant as South America. Bird densities attained over 300/ha and numbers of C. volutator exceeded SO,OOO/m2 locally. Aspects of the amphipod's biology examined include size, energy content, abundance, distribution and behaviour. Collected birds provided information on origins, sex ratio, flight range, fat content and diet. Their distribution, abundance, feeding behaviour and the effects of predation upon C. volutator were also studied. The effects of ingestion rate, prey size and time available for daylight feeding were considered in relation to energy intake, expenditure, fat deposition, and length of stay. Sandpipers fed where their amphipod prey were most abundant. Semi-diurnal tides appeared responsible for behavioural changes of both predation and prey and this factor and the differences in feeding conditions (e.g. daylength and prey availability) contributed greatly to the large cyclic variation in the amount of energy ingested. Fat seemed to be deposited most rapidly over spring tides. Evidence suggesting that the timing of migration is influenced by the same factors was also obtained.
Download or read book Comparative Feeding Ecology and Behaviour of Migrating Adult Least Calidris Minutilla Viellot and Semipalmated C Pusilla Linnaeus Sandpipers in the Southern Bight Minas Basin N S microform written by Peter Ross Norman MacDonald and published by National Library of Canada. This book was released on 1987 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Dynamic Model of Semipalmated Sandpiper Migration Implications for Conservation written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: I developed a stochastic dynamic programming model of adult female Semipalmated Sandpiper (Calidris pusilla) spring migration for the purpose of adaptive management of wetlands along their migratory route. Semipalmated Sandpipers are small abundant shorebirds that migrate through Merritt Island National Wildlife Refuge, FL, Yawkey Reserve, SC, Pea Island National Wildlife Refuge, NC, and Delaware Bay on their way from the Caribbean and South America to arctic North American breeding grounds. The first three stopover sites mentioned include managed wetlands. To manage these wetlands for Semipalmated Sandpiper and other migratory shorebirds' fitness by changing water levels to alter food availability, it is important to understand how the birds are using these stopover sites. A stochastic dynamic programming model is a model of organism behavior which assumes that the organism is attempting to optimize its fitness. In this model, the fitness of the birds depends on surviving migration as well as arriving on the breeding grounds close to an optimal date and with sufficient energy reserves. The birds can decide each day whether to stay at the current stopover site and feed, or to fly to the next site. Model parameters include flight constants, ground speed probabilities, energy gain, and predation rates. The values of several parameters were tuned so that average peaks of migration at the stopover sites and average percent fat of the birds on different days and stopover sites correlated well with data taken from published and unpublished studies. The model outcomes include average fitness, seasonal mortality rate, reproductive output, average length of stay at each stopover site, and percentage skimming (not staying to feed) at each stopover site. The peaks of migration matched the targets set. The birds stayed longest at the first and last stopover sites; many birds did not stop to feed at the middle two stopover sites. The average mortality of the spring migration sea.
Download or read book Do Wintering Conditions Drive Population Trends in Semipalmated Sandpipers Calidris Pusilla written by Megan L. Boldenow and published by . This book was released on 2018 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: Some of the most extreme long-distance migrants, Arctic-breeding shorebirds are disproportionately represented in tallies of declining species worldwide. For many shorebirds, including the semipalmated sandpiper (Calidris pusilla), the specific causes and mechanisms behind population declines have not been identified. Stressful conditions affecting birds during wintering are often implicated. Interactions between events and processes occurring in the disparate locations used throughout the annual cycle also may be critical in shaping both individual life histories and population demographics. The main objectives of my graduate research were: a) to examine whether semipalmated sandpipers wintering in specific locations incur differential levels of stress; and b) to test whether stressful conditions may carry over between different stages of an individual’s life cycle. Using measurements of corticosterone (the primary avian stress hormone) deposited in winter-grown feathers, I examined the contribution of breeding season and fall migration to winter-incurred stress, and looked for evidence of carryover effects from wintering conditions to spring migration and subsequent reproductive performance. In Chapter 1, I compared the levels of stress exposure of 40 semipalmated sandpipers that bred at five Arctic sites and spent the austral summer in distinct regions (identified via light-sensing geolocators) across their tropical ‘wintering’ range. I found stress exposure varied by wintering region, and birds using locations along the Atlantic coast of northeastern South America and the Pacific coast of Central America had the highest feather corticosterone levels. I did not find evidence that carryover effects from the breeding season and/or fall migration influenced birds’ physiology during winter. In Chapter 2, I investigated whether greater stress exposure during winter might subsequently affect birds during spring migration and/or breeding. I found that geolocator-tracked birds with increased stress levels delayed spring migration and initiated nests later. However, results for a larger dataset (including 254 birds breeding at seven sites across the North American Arctic) suggested low-stress birds nested later. It is possible the larger dataset included replacement clutches that could have confounded relationships with feather corticosterone, as only birds in better condition are likely to re-nest after clutch failure. In addition, I found evidence that stressful wintering conditions carryover to affect reproductive performance: females that accrued high levels of stress during wintering subsequently laid fewer eggs. In confirmed first nests, we found evidence for a clutch size–egg volume tradeoff, with high-stress females producing fewer offspring but potentially investing more in individual offspring. This research represents the first instance of the feather corticosterone technique being used to compare conditions across the wintering range of a calidrid shorebird and reveals specific wintering locations with high levels of stress exposure. This is also the first research that provides a mechanistic perspective on carryover effects between the wintering and breeding stages in a shorebird, through measurements of feather corticosterone. Finally, by showing that poor environmental conditions at wintering sites far from Arctic breeding areas may be detrimental to the reproductive performance of a species with declining populations, this research emphasizes the importance of considering full annual cycles in conservation and research efforts for migratory species.
