Effects of human disturbance on success of artificial duck nests

Article Abstract:

The successful management of waterfowl breeding grounds depends on improving nest success, but disturbance by researchers may cause nest depredation. A new study investigates the effects of human disturbance on nest success in Manitoba's Prairie Pothole Region. Nests were created in three types of cover, including a roadside right-of-way. Factors that could influence depredation, such as duck feces on eggs, partial damage to eggs, and a single human visit to nests, were assessed. It is shown that damaged eggs within nests and duck feces on eggs increase predation, although human trail effects are ambiguous.

Environmental aspects, Waterfowl, Birds, Bird eggs, Bird nests

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Effects of backpack and implanted radiotransmitters on captive blue-winged teal

Article Abstract:

Backpack-marked blue-winged teal show altered behaviour, according to research testing the null hypotheses that birds with backpacks, implant radios, and those without radios would not differ in behaviour and body mass. There was found to be no influence of backpack radios on mass, possibly because backpack-marked birds were able to maintain mass because of the relatively mild temperature. Increased comfort movements and aversion to water was seen throughout the study.

Bird banding, Waterfowl management

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Effects of mammalian predator removal on production of upland-nesting ducks in North Dakota

Article Abstract:

Research describing the effects of lethal removal of mammalian predators from duck nesting areas is presented. Duck nesting success is dramatically improved by such measures but may be disapproved of by the public.

Predation

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