Article Abstract:
Miniature video cameras can provide information about predator and nesting ecology that cannot be obtained in any other way. This research, undertaken at 69 nests of 10 passerine species in North Dakota, monitored nests in a variety of grassland habitats. Most of the predators videotaped were believed to be predators of grassland passerine nests, but few have been documented. It was established that a number of factors influence the risk of abandonment for camera nests. It was found that abandonment was more likely if cameras were used at nests during incubation than during brood rearing.
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Article Abstract:
Powder-tracking and far-infrared thermal sensors are useful techniques for predicting densities of burrowing mammals, including sciurids, pikas, microtines and heteromyids, if linked with validation by livetrapping. This research, undertaken in the Shakwak Trench, east of Kluane Lake in the southwestern Yukon Territory, Canada, assessed powder-tracking boards and far-infrared thermal imaging for estimating abundance of semifossorial mammals. These techniques are still useful for assessing changes in relative abundance, even when livetrapping cannot be undertaken.
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Article Abstract:
Research on red deer populations indicates that fecal corticoid metabolite measurements can be used to determine physiological stress, even in fecal samples up to six hours old. Discussion of corticoid testing and levels produced is included.
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