ASSESSING RAPTOR DIET: COMPARING PELLETS, PREY REMAINS, AND OBSERVATIONAL DATA AT HEN HARRIER NESTS
作者： Stephen M. Redpath , Roger Clarke , Mike Madders , Simon J. Thirgood
DOI: 10.1650/0010-5422(2001)103[0184:ARDCPP]2.0.CO;2
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摘要: Abstract We compared techniques to assess diet at 17 Hen Harrier (Circus cyaneus) nests. Diet was measured directly from observations and estimates pellets, prey remains a combination of pellets remains. For data pooled across nests, over-represented mammalian under-represented avian prey. Prey large small Combining pellet did not eliminate these biases. Pellets gave higher diversity values than direct detected more species. analyzed on nest by basis, were significantly related for three types frequency all biomass. These linear relationships used predict frequencies biomass in the observed five new Our findings suggest that are useful as an index certain typ...
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americanornithologypubs.org参考文章(13)
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