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A simple parametric method for reducing sample sizes in gut passage time trials

Rawsthorne, John, Roshier, David A. and Murphy, Sean R. 2009, A simple parametric method for reducing sample sizes in gut passage time trials, Ecology, vol. 90, no. 8, pp. 2328-2331, doi: 10.1890/08-1137.1.

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Title A simple parametric method for reducing sample sizes in gut passage time trials
Author(s) Rawsthorne, John
Roshier, David A.
Murphy, Sean R.
Journal name Ecology
Volume number 90
Issue number 8
Start page 2328
End page 2331
Publisher Ecological Society of America
Place of publication Ithaca, NY
Publication date 2009
ISSN 0012-9658
1939-9170
Keyword(s) Acanthagenys rufogularis
Amyema quandang
Dicaeum hirundinaceum
frugivore
gamma
gut passage time
lognormal
Mistletoebird
parametric distribution
seed dispersal
seed shadow
Spiny-cheeked Honeyeater
Summary Seed dispersal is now regularly analyzed using spatially explicit models, relying in part on frugivore gut passage times to produce model outputs. In determining species-specific gut passage times, there is a trade-off in sample size between minimizing collection effort and maintaining statistical reliability. Here we demonstrate that a two-parameter lognormal parametric distribution reliably fits empirical gut passage time distributions and is easily parameterized using relatively small data sets of approximately 30 defecations. We suggest this approach as a statistically reliable substitute for larger empirical gut passage data sets in seed dispersal modeling, and also as a way of using published gut passage data sets to parameterize new models.
Language eng
DOI 10.1890/08-1137.1
Field of Research 060203 Ecological Physiology
Socio Economic Objective 960899 Flora, Fauna and Biodiversity of Environments not elsewhere classified
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2009, Ecological Society of America
Persistent URL http://hdl.handle.net/10536/DRO/DU:30022039

Document type: Journal Article
Collection: School of Ecology and Environment
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Created: Mon, 18 Jan 2010, 11:03:39 EST

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