id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
work_lmzqjuedqjhmtf4n67mwcqvshe	Davide Gaglio	Dietary studies in birds: testing a non-invasive method using digital photography in seabirds	2016.0	22	.pdf	application/pdf	7776	724	67	compared our approach (photo-sampling) to a traditional method (regurgitations) for the greater crested 23 estimate the length of the main prey species (anchovy Engraulis encrasicolus) from photographs, with an 27 Key-words: diet, digital photography, non-invasive monitoring, prey-carrying birds, rarefaction curves, 37 To compare photo-sampling and regurgitation-sampling, we collected images of adults carrying prey and 198 species from 1,510 photo-samples compared to 11 species from 198 regurgitated prey items. Island, we identified 11 species from 157 photo-samples and 6 species from 103 regurgitated prey items 233 COMPARISONS OF PREY SIZE BETWEEN PHOTO-SAMPLING AND REGURGITATIONS 263 We identified 1,510 prey items of 22 species from the photographs taken by observer-A and 1,625 of 21 274 Photo-sampling offers an effective, low-impact alternative to traditional diet studies for birds that carry 281 Prey families in the greater crested tern diet identified by photo-sampling on Robben Island during the 509 	./cache/work_lmzqjuedqjhmtf4n67mwcqvshe.pdf	./txt/work_lmzqjuedqjhmtf4n67mwcqvshe.txt