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Title:

Tasmania's coastal reefs: deep reef habitats and significance for finfish production and biodiversity

Project Number:

2014-012

Organisation:

University of Tasmania (UTAS)

Principal Investigator:

Jeremy Lyle

Project Status:

Completed

FRDC Expenditure:

$227,904.26

Program(s):

Environment

2014-012-DLD - Tasmania's coastal reefs: deep reef habitats and significance for finfish production and biodiversity

Final Report
ISBN:978-1-86295-902-6
ISSN:
Author(s):Jeremy Lyle
Date Published:May 2017
Principal Investigator: Jeremy Lyle
 
Key Words: Temperate reefs; Reef habitat classification; Reef fish assemblages; Reef fish fisheries; Baited remote underwater video (BRUV); Remotely operated vehicle (ROV); Gillnets; Bayesian Ordination and Regression Analysis, Relative abundance (maxN); Species distribution modelling.
 
Summary: This study surveyed fish communities associated with two large patches of coastal reef that had been mapped previously using high-resolution multibeam acoustics.  The reefs, located on the east and south coasts of Tasmania, are the focus of important commercial and recreational fisheries. The surveys utilised underwater video methods, including baited remote underwater video (BRUV) and remotely operated vehicle (ROV), as well as gillnets.  Patterns in community composition, interactions between species and relationships with reef characteristics were described using multivariate statistical analyses.  This information was assessed for its utility to develop predictive distribution and abundance maps of key species.

Objectives

1. Characterise reef fish communities on the east and south-east coasts of Tasmania by depth and habitat structure

2. Describe habitat associations for the key reef fish species and their links to life-history characteristics

3. Assess the potential to use habitat characteristics to describe and predict fish community structure

4. Assess the significance of reef habitats for fisheries production and fishery assessments