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 7 of 7 for “"nest losses"”.
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Influence of Predation on Least Tern and Piping Plover Productivity Along the Missouri River in South Dakota
… 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 mortality. The effects of predation were found …
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The effects of intensive agriculture on the breeding of the lapwing (Vanellus vanellus L.).
… cropped area respectively. Lapwings preferred to nest in spring farmed fields and RSA. The overall nest survival was 55.5% and did not differ significantly between years. Hatching success was highest in RSA (88%), lowest in spring farmed fields (48.4%) and intermediate in winter farmed fields …
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Nest predation and habitat selection in the grasshopper sparrow (Ammodramus savannarum)
Predation is the leading cause of nest failure for many birds and is an important source of natural selection that shapes avian behavior and life-history traits. However, our understanding of the relationship between habitat characteristics and nest loss and how predation affects nest-site …
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Using Conditioned Food Aversion (CFA) to reduce Pied Crow (Corbus albus) predation of plover nests
Nest predation is one of the principle constraints on bird breeding success, accounting for 20 to 80% of all nest failures. It can be exacerbated by anthropogenic factors and the resultant increased predation pressure has caused the decline of numerous bird species worldwide. Identifying management …
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The breeding ecology and behavioural adaptations of African black oystercatchers in light of climate change
… factors influence the vulnerability of nesting African Black Oystercatchers Haematopus moquini (oystercatchers) to climate and habitat change. I explore, for the first time, the behavioural adaptations used by the species to cope with breeding in a limited strip of beach, between high …
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Changes in Waterfowl, Wetlands, Demographics, and Land Use on the Waubay Study Area, Day County, South Dakota: 1950-53 vs. 1992-93
… to 1951 and in 1993 compared to 1953. Over-water nest searches of 55 wetlands (40 class IV and 15 class III) were conducted during 1992 and 1993. Sixty-six active over-water nests were found in 1992 and 64 in 1993. Redheads (Avthya americana) were the most abundant over-water nester during both …
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Adaption an Nestprädation bei der Mönchsgrasmücke
Nestprädation gilt als ein Hauptparameter für die Selektion von Lebenszyklusmerkmalen bei Singvögeln. Als Reaktion kann die natürliche Selektion zum einen eine Vermeidung der Prädation bewirken, z.B. durch das heimliche Verhalten der Eltern, Verteidigung der Nester, Verminderung der Auffälligkeit …