Nest parasitism and brood-related behavior of the ruddy duck (Oxyura jamaicensis rubida) / David E. Joyner.
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TextPublication details: Lincoln, NE : University of Nebraska, 1975.Description: ix, 142 leaves : ill. ; 28 cmOnline resources: Abstract: This dissertation consists of two sections: (1) an analysis of the effects of interspecific, intraspecific and artificial nest parasitism and, (2) a discussion of Ruddy Duck brood-related behavior. The first section analyses and compares the effects of Ruddy Duck and Redhead (Aythya americana) interspecific nest parasitism of five anatid host species. Two hundred and ninety of 809 duck nests were found to have been naturally parasitized by one or both species, including 264 nests by the Redhead and 62 nests by the Ruddy Duck. Pintail (Anas acuta) and Cinnamon Teal (Anas cyanoptera) nests most frequently incurred Redhead parasitism, whereas Cinnamon Teal and Redhead nests were most often parasitized by the Ruddy Duck. Mallard (Anas platyrhynchos), Pintail,and Cinnamon Teal nests parasitized interspecifically by Ruddy Ducks and Redheads had significantly (P<0.05) reduced hatching successes. Cinnamon Teal hatching success was significantly (P<0.05) reduced through host-egg displacement,
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Thesis(Ph.D.)--University of Nebraska, 1975.
This dissertation consists of two sections: (1) an analysis of the effects of interspecific, intraspecific and artificial nest parasitism and, (2) a discussion of Ruddy Duck brood-related behavior. The first section analyses and compares the effects of Ruddy Duck and Redhead (Aythya americana) interspecific nest parasitism of five anatid host species. Two hundred and ninety of 809 duck nests were found to have been naturally parasitized by one or both species, including 264 nests by the Redhead and 62 nests by the Ruddy Duck. Pintail (Anas acuta) and Cinnamon Teal (Anas cyanoptera) nests most frequently incurred Redhead parasitism, whereas Cinnamon Teal and Redhead nests were most often parasitized by the Ruddy Duck. Mallard (Anas platyrhynchos), Pintail,and Cinnamon Teal nests parasitized interspecifically by Ruddy Ducks and Redheads had significantly (P<0.05) reduced hatching successes. Cinnamon Teal hatching success was significantly (P<0.05) reduced through host-egg displacement,