@article {Hobson2009Method,
	title = {A Method for Investigating Population Declines of Migratory Birds Using Stable Isotopes: Origins of Harvested Lesser Scaup in North America},
	journal = {PLoS ONE},
	volume = {4},
	number = {11},
	year = {2009},
	month = {November},
	pages = {e7915+},
	publisher = {Public Library of Science},
	abstract = {Elucidating geographic locations from where migratory birds are recruited into adult breeding populations is a fundamental but largely elusive goal in conservation biology. This is especially true for species that breed in remote northern areas where field-based demographic assessments are logistically challenging.},
	keywords = {gis, migration, migratory-birds, migratory-species, monitoring},
	doi = {10.1371/journal.pone.0007915},
	url = {http://dx.doi.org/10.1371/journal.pone.0007915},
	author = {Hobson, Keith A. and Wunder, Michael B. and Van Wilgenburg, Steven L. and Clark, Robert G. and Wassenaar, Leonard I.}
}
@article {Guttridge2010Novel,
	title = {Novel Acoustic Technology for Studying Free-Ranging Shark Social Behaviour by Recording Individuals{\textquoteright} Interactions},
	journal = {PLoS ONE},
	volume = {5},
	number = {2},
	year = {2010},
	month = {February},
	pages = {e9324+},
	publisher = {Public Library of Science},
	abstract = {Group behaviours are widespread among fish but comparatively little is known about the interactions between free-ranging individuals and how these might change across different spatio-temporal scales. This is largely due to the difficulty of observing wild fish groups directly underwater over long enough time periods to quantify group structure and individual associations. Here we describe the use of a novel technology, an animal-borne acoustic proximity receiver that records close-spatial associations between free-ranging fish by detection of acoustic signals emitted from transmitters on other individuals. Validation trials, held within enclosures in the natural environment, on juvenile lemon sharks Negaprion brevirostris fitted with external receivers and transmitters, showed receivers logged interactions between individuals regularly when sharks were within 4 m (\~{}4 body lengths) of each other, but rarely when at 10 m distance. A field trial lasting 17 days with 5 juvenile lemon sharks implanted with proximity receivers showed one receiver successfully recorded association data, demonstrating this shark associated with 9 other juvenile lemon sharks on 128 occasions. This study describes the use of acoustic underwater proximity receivers to quantify interactions among wild sharks, setting the scene for new advances in understanding the social behaviours of marine animals.},
	keywords = {bioacoustics, monitoring, peer-to-peer},
	doi = {10.1371/journal.pone.0009324},
	url = {http://dx.doi.org/10.1371/journal.pone.0009324},
	author = {Guttridge, Tristan L. and Gruber, Samuel H. and Krause, Jens and Sims, David W.}
}
