Delineating optimal settlement areas of juvenile reef fish in Ngederrak Reef, Koror state, Republic of Palau

Ticzon, Victor S., Foster, Greg, David, Laura T., Mumby, Peter J., Samaniego, Badi R. and Madrid, Val Randolf (2015) Delineating optimal settlement areas of juvenile reef fish in Ngederrak Reef, Koror state, Republic of Palau. Environmental Monitoring and Assessment, 187 1: 4089.1-4089.14. doi:10.1007/s10661-014-4089-7

Author Ticzon, Victor S.
Foster, Greg
David, Laura T.
Mumby, Peter J.
Samaniego, Badi R.
Madrid, Val Randolf
Title Delineating optimal settlement areas of juvenile reef fish in Ngederrak Reef, Koror state, Republic of Palau
Journal name Environmental Monitoring and Assessment   Check publisher's open access policy
ISSN 0167-6369
Publication date 2015-01-01
Year available 2014
Sub-type Article (original research)
DOI 10.1007/s10661-014-4089-7
Open Access Status Not Open Access
Volume 187
Issue 1
Start page 4089.1
End page 4089.14
Total pages 14
Place of publication Dordrecht, The Netherlands
Publisher Springer
Language eng
Formatted abstract
Establishing the effectiveness of habitat features to act as surrogate measures of diversity and abundance of juvenile reef fish provides information that is critical to coral reef management. When accurately set on a broader spatial context, microhabitat information becomes more meaningful and its management application becomes more explicit. The goal of the study is to identify coral reef areas potentially important to juvenile fishes in Ngederrak Reef, Republic of Palau, across different spatial scales. To achieve this, the study requires the accomplishment of the following tasks: (1) structurally differentiate the general microhabitat types using acoustics; (2) quantify microhabitat association with juvenile reef fish community structure; and (3) conduct spatial analysis of the reef-wide data and locate areas optimal for juvenile reef fish settlement. The results strongly suggest the importance of branching structures in determining species count and abundance of juvenile reef fish at the outer reef slope of Ngederrak Reef. In the acoustic map, the accurate delineation of these features allowed us to identify reef areas with the highest potential to harbor a rich aggregation of juvenile reef fish. Using a developed spatial analysis tool that ranks pixel groups based on user-defined parameters, the reef area near the Western channel of Ngederrak is predicted to have the most robust aggregation of juvenile reef fish. The results have important implications not only in management, but also in modeling the impacts of habitat loss on reef fish community. At least for Ngederrak Reef, the results advanced the utility of acoustic systems in predicting spatial distribution of juvenile fish.
Keyword Acoustics
Juvenile reef fish
Microhabitat complexity
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2015 Collection
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