Predicting structural complexity of reefs and fish abundance using acoustic remote sensing (RoxAnn)

Bejarano, Sonia, Mumby, Peter J. and Sotheran, Ian (2011) Predicting structural complexity of reefs and fish abundance using acoustic remote sensing (RoxAnn). Marine Biology, 158 3: 489-504. doi:10.1007/s00227-010-1575-5


Author Bejarano, Sonia
Mumby, Peter J.
Sotheran, Ian
Title Predicting structural complexity of reefs and fish abundance using acoustic remote sensing (RoxAnn)
Journal name Marine Biology   Check publisher's open access policy
ISSN 0025-3162
1432-1793
Publication date 2011
Year available 2010
Sub-type Article (original research)
DOI 10.1007/s00227-010-1575-5
Volume 158
Issue 3
Start page 489
End page 504
Total pages 16
Editor Ulrich Sommer
Place of publication Berlin, Germany
Publisher Springer
Collection year 2011
Language eng
Formatted abstract
This study determined whether the acoustic roughness of Caribbean reef habitats is an accurate proxy for their topographic complexity and a significant predictor of their fish abundance. Fish abundance was measured in 25 sites along the forereef of Glovers Atoll (Belize). At each site, in situ rugosity (ISR) was estimated using the ‘‘chain and tape’’ method, and acoustic roughness (E1) was acquired using RoxAnn. The relationships between E1 and ISR, and between both E1 and ISR and the abundance of 17 common species and the presence of 10 uncommon species were tested. E1 was a significant predictor of the topographic complexity (r2 = 0.66), the abundance of 10 common species of surgeonfishes, pomacentrids, scarids, grunts and serranids and the presence of 4 uncommon species of pomacentrids and snappers. Small differences in E1 (i.e. D0.05–0.07) reflected in subtle but significant differences in fish abundance (*1 individual 200 m-2 and 116 g 200 m-2) among sites. Although we required the use of IKONOS data to obtain a large number of echoes per site, future studies will be able to utilise RoxAnn data alone to detect spatial patterns in substrate complexity and fish abundance, provided that a minimum of 50 RoxAnn echoes are collected per site.
© 2010 Springer-Verlag.

Keyword Acoustic roughness (E1)
Caribbean reef habitats
Topographic complexity
Fish abundance
Study
RoxAnn
In situ rugosity (ISR)
Coral reef fish communities
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Online First publication - Published online 19th November 2010

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2011 Collection
School of Biological Sciences Publications
 
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Created: Tue, 14 Dec 2010, 13:38:56 EST by Gail Walter on behalf of School of Biological Sciences