DOCSLIB.ORG

Evaluating Baseline Conditions and Resulting Changes in Demersal Fish

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Evaluating Baseline Conditions and Resulting Changes in Demersal Fish Evaluating baseline conditions and resulting changes in demersal fish communities of South East Australia ! ! Novaglio Camilla BSc., MSc. Submitted in fulfillment of the requirements for the Doctor of Philosophy in Quantitative Marine Science Institute for Marine and Antarctic Studies University of Tasmania November 2015 ! 1! Statements and declarations Declaration of Originality This thesis contains no material which has been accepted for a degree or diploma by the University or any other institution, except by way of background information and duly acknowledged in the thesis, and to the best of my knowledge and belief no material previously published or written by another person except where due acknowledgement is made in the text of the thesis, nor does the thesis contain any material that infringes copyright. Authority of Access This thesis may be made available for loan and limited copying and communication in accordance with the Copyright Act 1968. Camilla Novaglio Hobart, November 2015 ! 2! Acknowledgements First of all I wish to express my sincere thanks to my supervisory team: Dr. Tony Smith, Prof. Stewart Frusher, and Dr. Francesco Ferretti. Thanks for all the knowledge and experience you made available for this thesis, and for being always positive and supportive. Without your many reassuring words I would have abandoned the journey long ago and not been writing the acknowledgment of my PhD thesis right now. Many others have also contributed to this thesis. Thanks to Neil Klaer, Ken Graham and Jeremy Lyle for providing valuable data and lots of advice. Thanks to Franzis Althaus for her assistance with fishing effort data retrieval and analysis, and to Mike Fuller for his help in creating nice maps. Thanks to John Pogonoski and Daniel Gledhill for sharing taxonomic expertise. Thanks to the stock assessment team, in particular Jemery Day, Sally Wayte, Robin Thompson (it was a pleasure to share an office with all of you), Geoff Tuck and Malcolm Haddon for patiently replying to all my questions about stock assessment. Thanks to Simon Wotherspoon, Miriana Sporcic and Scott Foster for statistical advice. Thanks to Tony Harrison for the pleasant chats on the history of fishing in Tasmania. Friends, my life during these years would have not been as smooth without you. Lizzie Dougan, Dale Cooke, Daniela Farias, Jorge Mardones, Claudio Castillo, Sandra Curin, Malinda Auluck, Maximiliano Farias and Gigi Astorga, you’ve been the best housemates ever! I will never forget the flow of food and laughs running through the house. Lara Marcus, Kathy Alter and Makrina thanks for your loyal friendship and for coping with my always-changing mood. Olive Mia Southern, my ! 3! two-year-old best friend, thanks for sharing the joy of playing until collapsing strengthless. You made my messed up days carefree. Thanks to my family and friends in Italy. Despite the distance, you’ve always known how to cheer me up. A special thanks goes to my life companion, Marco Zanetti. Your excitement and believe in everything I do had been essential for the accomplishment of my PhD. Dedicato alla mia cara nonna Lina. ! ! 4! Abstract Knowledge of the full extent and severity of ecological changes in human-influenced ecological systems is needed to identify today’s management priorities and to set realistic restoration objectives for the future. However, reconstructing ecosystem baselines and understanding the causes and rates of ecological changes is often hampered by the scarcity of data about population and community status before exploitation, and by the challenges of fitting these (historical) data into modern analytical methods. This study aimed to identify the main sources of fishing impacts on marine communities of South East Australia and to gather and examine historical data available for the region that can provide information on baseline (pre-fishing) conditions to compare changes in fish communities as the fishing industry developed. South East Australia provides an ideal case study as its history of exploitation is relatively recent and there were surveys undertaken prior to exploitation. While a range of commercial fisheries have evolved in South East Australia since European colonization, during the last century bottom trawling has been the major fishing activity in the region. Bottom trawl surveys that included information on demersal species abundance and community structure were carried out both before and at different stages since trawling exploitation begun, and thus provide insights into the full extent of fishing impacts on South East Australian demersal fish communities. These surveys, covering the period 1898-1997, were performed by various research agencies, which collected and organized catch and effort data in different formats. ! 5! Additionally, the detail of the information reported changes across surveys and over the years. Hence, the initial need was to collect, digitalize and standardize all the information available. The bottom trawl survey dataset resulting from this step contained a total of 3,083 tows sampling 574 species among chondrichthyes and osteichthyes. It spans the entire history of trawling exploitation and is analyzed in this study as an entire dataset for the first time. A comparison of pre- with post-trawling exploitation data (1898-1910 and 1980s- 2010s, respectively) revealed marked changes in the structure of demersal fish communities of South East Australia. These included shifts in the catch composition of the main families, as well as sharp declines in the total and individual family catch rate, most likely related to the effect of fishing. Among the steepest declines were those of key commercial families, such as flatheads and morwongs, on the continental shelf of Tasmania. The effect of trawling on demersal fish communities of South East Australia was also revealed by the application of species accumulation curves to the survey dataset. Specifically, the rate of species accumulation with area decreased as trawling intensity increased, suggesting that trawling modified community structure through the removal of particular species and through changes in the abundance and spatial distribution of the remaining species. This study’s findings have direct application to management and monitoring of the natural resources in South East Australia, and important implications for sustainable use and conservation prioritization. The study also provides a framework and approach that can be of guidance for the collection, standardization and analysis of analogous, patchy, unbalanced and overlooked historical datasets around the world. ! 6! Table of Contents 1 Chapter 1 – Introduction .................................................................................... 13 1.1 Thesis structure ........................................................................................................ 19 2 Chapter 2 - Historical overview of fishing exploitation and scientific bottom trawl surveys in South East Australia ...................................................................... 21 2.1 Abstract ..................................................................................................................... 21 2.2 Introduction .............................................................................................................. 21 2.3 Aboriginal and colonial fisheries ............................................................................ 24 2.3.1 Aboriginal fishing ............................................................................................... 24 2.3.2 Sealing and whaling ............................................................................................ 25 2.3.3 Finfish fisheries .................................................................................................. 27 2.4 Commercial trawling ............................................................................................... 31 2.4.1 Steam trawling .................................................................................................... 31 2.4.2 Diesel powered trawling ..................................................................................... 35 2.4.3 The trawl fishery today ....................................................................................... 38 2.4.4 Overview of the trawl fishery ............................................................................. 41 2.4.5 Other sources of impacts .................................................................................... 44 2.5 Long-term datasets .................................................................................................. 46 2.5.1 Bottom trawl surveys ......................................................................................... 46 2.5.2 Other sources of data .......................................................................................... 53 2.6 Discussion .................................................................................................................. 54 3 Chapter 3 – Bottom trawl survey data collection and standardization .......... 57 3.1 Introduction .............................................................................................................. 57 3.2 Methods ..................................................................................................................... 57 3.2.1 Data collection and digitalization ....................................................................... 57 3.2.2 Data standardization ..........................................................................................
Load more

Recommended publications
  • Biogenic Habitats on New Zealand's Continental Shelf. Part II
    Biogenic habitats on New Zealand’s continental shelf. Part II: National field survey and analysis New Zealand Aquatic Environment and Biodiversity Report No. 202 E.G. Jones M.A. Morrison N. Davey S. Mills A. Pallentin S. George M. Kelly I. Tuck ISSN 1179-6480 (online) ISBN 978-1-77665-966-1 (online) September 2018 Requests for further copies should be directed to: Publications Logistics Officer Ministry for Primary Industries PO Box 2526 WELLINGTON 6140 Email: [email protected] Telephone: 0800 00 83 33 Facsimile: 04-894 0300 This publication is also available on the Ministry for Primary Industries websites at: http://www.mpi.govt.nz/news-and-resources/publications http://fs.fish.govt.nz go to Document library/Research reports © Crown Copyright – Fisheries New Zealand TABLE OF CONTENTS EXECUTIVE SUMMARY 1 1. INTRODUCTION 3 1.1 Overview 3 1.2 Objectives 4 2. METHODS 5 2.1 Selection of locations for sampling. 5 2.2 Field survey design and data collection approach 6 2.3 Onboard data collection 7 2.4 Selection of core areas for post-voyage processing. 8 Multibeam data processing 8 DTIS imagery analysis 10 Reference libraries 10 Still image analysis 10 Video analysis 11 Identification of biological samples 11 Sediment analysis 11 Grain-size analysis 11 Total organic matter 12 Calcium carbonate content 12 2.5 Data Analysis of Core Areas 12 Benthic community characterization of core areas 12 Relating benthic community data to environmental variables 13 Fish community analysis from DTIS video counts 14 2.6 Synopsis Section 15 3. RESULTS 17 3.1
    [Show full text]
  • Download Full Article 1.0MB .Pdf File
    Memoirs of the Museum of Victoria 57( I): 143-165 ( 1998) 1 May 1998 https://doi.org/10.24199/j.mmv.1998.57.08 FISHES OF WILSONS PROMONTORY AND CORNER INLET, VICTORIA: COMPOSITION AND BIOGEOGRAPHIC AFFINITIES M. L. TURNER' AND M. D. NORMAN2 'Great Barrier Reef Marine Park Authority, PO Box 1379,Townsville, Qld 4810, Australia ([email protected]) 1Department of Zoology, University of Melbourne, Parkville, Vic. 3052, Australia (corresponding author: [email protected]) Abstract Turner, M.L. and Norman, M.D., 1998. Fishes of Wilsons Promontory and Comer Inlet. Victoria: composition and biogeographic affinities. Memoirs of the Museum of Victoria 57: 143-165. A diving survey of shallow-water marine fishes, primarily benthic reef fishes, was under­ taken around Wilsons Promontory and in Comer Inlet in 1987 and 1988. Shallow subtidal reefs in these regions are dominated by labrids, particularly Bluethroat Wrasse (Notolabrus tet­ ricus) and Saddled Wrasse (Notolabrus fucicola), the odacid Herring Cale (Odax cyanomelas), the serranid Barber Perch (Caesioperca rasor) and two scorpidid species, Sea Sweep (Scorpis aequipinnis) and Silver Sweep (Scorpis lineolata). Distributions and relative abundances (qualitative) are presented for 76 species at 26 sites in the region. The findings of this survey were supplemented with data from other surveys and sources to generate a checklist for fishes in the coastal waters of Wilsons Promontory and Comer Inlet. 23 I fishspecies of 92 families were identified to species level. An additional four species were only identified to higher taxonomic levels. These fishes were recorded from a range of habitat types, from freshwater streams to marine habitats (to 50 m deep).
    [Show full text]
  • Determining the Diet of New Zealand King Shag Using DNA Metabarcoding
    Determining the diet of New Zealand king shag using DNA metabarcoding New Zealand King Shag, (Leucocarbo carunculatus) on Blumine Island, Marlborough Sounds, New Zealand in 2016 (Wikipedia commons). Aimee van der Reis & Andrew Jeffs Report Prepared For: Department of Conservation, Conservation Services Programme, Project BCBC2019-05. DOC MarineDRAFT Science Advisors Graeme Taylor and Dr Karen Middlemiss. November 2020 Reports from Auckland UniServices Limited should only be used for the purposes for which they were commissioned. If it is proposed to use a report prepared by Auckland UniServices Limited for a different purpose or in a different context from that intended at the time of commissioning the work, then UniServices should be consulted to verify whether the report is being correctly interpreted. In particular it is requested that, where quoted, conclusions given in Auckland UniServices reports should be stated in full. INTRODUCTION The New Zealand king shag (Leucocarbo carunculatus) is an endemic seabird that is classed as nationally endangered (Miskelly et al., 2008). The population is confined to a small number of colonies located around the coastal margins of the outer Marlborough Sounds (South Island, New Zealand); with surveys suggesting the population is currently stable (~800 individuals surveyed in 2020; Aquaculture New Zealand, 2020; Schuckard et al., 2015). Monitoring the colonies has become a priority and research is being conducted to better understand their population dynamics and basic ecology to improve the management of the population, particularly in relation to human activities such as fishing, aquaculture and land use (Fisher & Boren, 2012). The diet of the New Zealand king shag is strongly linked to the waters surrounding their colonies and it has been suggested that anthropogenic activities, such as marine farm structures, may displace foraging habitat that could affect the population of New Zealand king shag (Fisher & Boren, 2012).
    [Show full text]
  • Introduced Species Survey
    ISSN: 1328-5548 Marine and Freshwater Resources Institute Report No. 4 Exotic Marine Pests in the Port of Hastings, Victoria. D. R. Currie and D. P. Crookes December 1997 Marine and Freshwater Resources Institute PO Box 114 Queenscliff 3225 CONTENTS SUMMARY 1 1. BACKGROUND 2 2. DESCRIPTION OF THE PORT OF HASTINGS 3 2.1 Shipping movements 3 2.2 Port development and maintenance activities 4 2.21 Dredge and spoil dumping 4 2.22 Pile construction and cleaning 5 3. EXISTING BIOLOGICAL INFORMATION 5 4. SURVEY METHODS 6 4.1 Phytoplankton 6 4.11 Sediment sampling for cyst-forming species 6 4.12 Phytoplankton sampling 6 4.2 Trapping 7 4.3 Zooplankton 7 4.4 Diver observations and collections on wharf piles 7 4.5 Visual searches 7 4.6 Epibenthos 8 4.7 Benthic infauna 8 4.8 Seine netting 8 4.9 Sediment analysis 8 5. SURVEY RESULTS 9 5.1 Port environment 9 5.2 Introduced species in port 9 5.21 ABWMAC target introduced species 9 5.22 Other target species 11 5.23 Additional exotic species detected 12 5.24 Adequacy of survey intensity 13 6. IMPACT OF EXOTIC SPECIES 13 7. ORIGIN AND POSSIBLE VECTORS FOR THE INTRODUCTION OF EXOTIC SPECIES FOUND IN THE PORT. 14 8. INFLUENCES OF THE PORT ENVIRONMENT ON THE SURVIVAL OF INTRODUCED SPECIES. 15 ACKNOWLEDGMENTS 16 REFERENCES 17 TABLES 1-6 21 FIGURES 1-5 25 APPENDICES 1 & 2 36 SUMMARY The Port of Hastings in Westernport Bay was surveyed for introduced species between 4th and 15th of March 1997.
    [Show full text]
  • Baseline Status of Subtidal Reefs and Associated Biodiversity Patterns in the AMLR Region
    Subtidal Reef Health Program: Baseline status of subtidal reefs and associated biodiversity patterns in the AMLR region. James Brook, Kristian Peters, Simon Bryars, Sam Owen, Jamie Hicks, David Miller, Daniel Easton, Yvette Eglington, Craig Meakin and Danny Brock Department for Environment and Water February, 2020 DEW Technical report DEW-TR-2020-01 Department for Environment and Water GPO Box 1047, Adelaide SA 5001 Telephone National (08) 8463 6946 International +61 8 8463 6946 Fax National (08) 8463 6999 International +61 8 8463 6999 Website www.environment.sa.gov.au Disclaimer The Department for Environment and Water and its employees do not warrant or make any representation regarding the use, or results of the use, of the information contained herein as regards to its correctness, accuracy, reliability, currency or otherwise. The Department for Environment and Water and its employees expressly disclaims all liability or responsibility to any person using the information or advice. Information contained in this document is correct at the time of writing. With the exception of the Piping Shrike emblem, other material or devices protected by Aboriginal rights or a trademark, and subject to review by the Government of South Australia at all times, the content of this document is licensed under the Creative Commons Attribution 4.0 Licence. All other rights are reserved. © Crown in right of the State of South Australia, through the Department for Environment and Water 2020 ISBN 978-1-925964-30-1 Preferred way to cite this publication Brook J, Peters K, Bryars S, Owen S, Hicks J, Miller D, Easton D, Eglington Y, Meakin C & Brock D (2020).
    [Show full text]
  • Reef Fishes of Conservation Concern in South Australia
    Reef Fishes of Conservation Concern in South Australia A Field Guide In the end, we will conserve only what we love, we will love only what we understand, and we will understand only what we are taught. — Baba Dioum, 1968. by Janine L. Baker, Marine Ecologist SUPPORTED BY THE Adelaide and Mount Lofty Ranges Natural Resources Management Board Acknowledgments Thanks to the Adelaide and Mt Lofty Ranges Natural Resources Management (AMLR NRM) Board for supporting the development of this field guide. Particular thanks to Janet Pedler and Liz Millington at AMLR NRM Board for guidance, advice and support. I am grateful to DENR, especially Patricia von Baumgarten and Simon Bryars, for part- supporting my time in writing an e-book on South Australian fishes, from which much of the information in this field guide was derived. Thanks to all of the marine researchers and divers who generously provided images for this guide. In alphabetical order, they include: James Brook, Adrian Brown, Simon Bryars, Helen Crawford, Graham Edgar, Chris Hall, Barry Hutchins, Rudie Kuiter, Paul Macdonald, Phil Mercurio, David Muirhead, Kevin Smith and Rick Stuart-Smith. The keen eye and skill of these photographers have significantly contributed to the visual appeal and educational value of the work. A photograph from the internet has also been included, and thanks to the photographer Richard Ling for making his image of Girella tricuspidata available in the public domain. I am grateful to Graham Edgar, Scoresby Shepherd and Simon Bryars for taking the time to edit and proofread the draft text. Thanks to Céline Lawrence for formatting the draft booklet for web-based printing and hard copy printing.
    [Show full text]
  • Aracaniform Swimming: a Proposed New Category of Swimming Mode in Bony Fishes (Teleostei: Tetraodontiformes: Aracanidae)*
    235 BRIEF COMMUNICATION Aracaniform Swimming: A Proposed New Category of Swimming Mode in Bony Fishes (Teleostei: Tetraodontiformes: Aracanidae)* † Malcolm S. Gordon1, fins. The bases of those fins in ostraciids are enclosed in bone. Dean V. Lauritzen1,2 The openings in aracanids free the fins and tail to move. As Alexis M. Wiktorowicz-Conroy1 a result, aracanids are body and caudal fin swimmers. Their Kelsi M. Rutledge1 overall swimming performances are less stable, efficient, and ef- 1Department of Ecology and Evolutionary Biology, University fective. We propose establishing a new category of swimming of California Los Angeles, Box 90095-1606, Los Angeles, mode for bony fishes called “aracaniform swimming.” California 90095; 2Department of Bioscience, City College of San Francisco, San Francisco, California 94112 Keywords: fish swimming, deepwater boxfishes, Aracanidae, swimming mode, performance, functional morphology, bio- Accepted 11/16/2019; Electronically Published 4/7/2020 mechanics, kinematics. Online enhancements: appendix figures and tables, videos, data. ABSTRACT Introduction The deepwater boxfishes of the family Aracanidae are the phy- The 13 species of deepwater boxfishes of the family Aracanidae are logenetic sister group of the shallow-water, generally more tropical the monophyletic phylogenetic sister group of the also mono- boxfishes of the family Ostraciidae. Both families are among the phyletic shallow-water, generally more tropical 24 species of box- most derived groups of teleosts. All members of both families have fishes of the family Ostraciidae. Both families are among the most armored bodies, the forward 70% of which are enclosed in rigid derived groups of living teleosts. These statements are based on bony boxes (carapaces).
    [Show full text]
  • Description of Key Species Groups in the East Marine Region
    Australian Museum Description of Key Species Groups in the East Marine Region Final Report – September 2007 1 Table of Contents Acronyms........................................................................................................................................ 3 List of Images ................................................................................................................................. 4 Acknowledgements ....................................................................................................................... 5 1 Introduction............................................................................................................................ 6 2 Corals (Scleractinia)............................................................................................................ 12 3 Crustacea ............................................................................................................................. 24 4 Demersal Teleost Fish ........................................................................................................ 54 5 Echinodermata..................................................................................................................... 66 6 Marine Snakes ..................................................................................................................... 80 7 Marine Turtles...................................................................................................................... 95 8 Molluscs ............................................................................................................................
    [Show full text]
  • Mcmillan NZ Fishes Vol 2
    New Zealand Fishes Volume 2 A field guide to less common species caught by bottom and midwater fishing New Zealand Aquatic Environment and Biodiversity Report No. 78 ISSN 1176-9440 2011 Cover photos: Top – Naked snout rattail (Haplomacrourus nudirostris), Peter Marriott (NIWA) Centre – Red pigfish (Bodianus unimaculatus), Malcolm Francis. Bottom – Pink maomao (Caprodon longimanus), Malcolm Francis. New Zealand fishes. Volume 2: A field guide to less common species caught by bottom and midwater fishing P. J McMillan M. P. Francis L. J. Paul P. J. Marriott E. Mackay S.-J. Baird L. H. Griggs H. Sui F. Wei NIWA Private Bag 14901 Wellington 6241 New Zealand Aquatic Environment and Biodiversity Report No. 78 2011 Published by Ministry of Fisheries Wellington 2011 ISSN 1176-9440 © Ministry of Fisheries 2011 McMillan, P.J.; Francis, M.P.; Paul, L.J.; Marriott, P.J; Mackay, E.; Baird, S.-J.; Griggs, L.H.; Sui, H.; Wei, F. (2011). New Zealand fishes. Volume 2: A field guide to less common species caught by bottom and midwater fishing New Zealand Aquatic Environment and Biodiversity Report No.78. This series continues the Marine Biodiversity Biosecurity Report series which ended with MBBR No. 7 in February 2005. CONTENTS PAGE Purpose of the guide 4 Organisation of the guide 4 Methods used for the family and species guides 5 Data storage and retrieval 7 Acknowledgments 7 Section 1: External features of fishes and glossary 9 Section 2: Guide to families 15 Section 3: Guide to species 31 Section 4: References 155 Index 1 – Alphabetical list of family
    [Show full text]
  • View/Download
    TETRAODONTIFORMES (part 2) · 1 The ETYFish Project © Christopher Scharpf and Kenneth J. Lazara COMMENTS: v. 1.0 - 30 Nov. 2020 Order TETRAODONTIFORMES (part 2 of 2) Suborder MOLOIDEI Family MOLIDAE Molas or Ocean Sunfishes 3 genera · 5 species Masturus Gill 1884 mast-, mastoid; oura, tail, referring to caudal fin (clavus) “extended backwards at the subaxial or submedian rays, and assuming a mastoid shape” Masturus lanceolatus (Liénard 1840) lanceolate, referring to shape of clavus (where dorsal and anal fins merge), forming a tail-like triangular lobe Mola Koelreuter 1766 millstone, referring to its somewhat circular shape (not tautonymous with Tetraodon mola Linnaeus 1758 since Koelreuter proposed a new species, M. aculeatus, actually a juvenile M. mola) Mola alexandrini (Ranzani 1839) in honor of Antonio Alessandrini (1786-1861, note latinization of name), Italian physician and anatomist, author of a detailed anatomical study of Mola gills published later that year [previously known as M. ramsayi] Mola mola (Linnaeus 1758) millstone, referring to its somewhat circular shape Mola tecta Nyegaard, Sawai, Gemmell, Gillum, Loneragan, Yamanoue & Stewart 2017 disguised or hidden, referring to how this species “evaded discovery for nearly three centuries, despite the keen interest among early sunfish taxonomists and the continued attention these curious fish receive” Ranzania Nardo 1840 -ia, belonging to: Camillo Ranzani (1775-1841), priest, naturalist and director of the Museum of Natural History of Bologna, for being the first to recognize Molidae as a distinct family [although authorship of family dates to Bonaparte 1835], and for “many other titles of merit in various branches of zoology” (translation) Ranzania laevis (Pennant 1776) smooth, referring to smooth skin covered with small, hard, hexagonal plates Mola alexandrini.
    [Show full text]
  • Environmental Assessment Report (EAR) (Current Document) for the DP
    Department Of Communities - Housing Environmental Assessment for Davis Park March 2019 Executive summary The Department of Communities – Housing (Housing) has assembled a project team, with Urbis being the lead town planning consultant, to prepare for the lodgement and approval of the Davis Park Local Structure Plan (DPLSP). The aim of the DLSP is to guide the future development of the Davis Park (DP). The DP is located along major arterial roads and within 3 km of Fremantle CBD and 20 km of Perth CBD. GHD Pty Ltd (GHD) was commissioned by Housing to provide an environmental assessment report (EAR) (current document) for the DP. The EAR includes a desktop and vegetation assessment of the project area to identify environmental constraints and native vegetation on site. This information will be used to assist in the design process. It is GHD’s understanding that this EAR will be included in the DPLSP report. This report is subject to, and must be read in conjunction with, the limitations set out in section 1.6 and the assumptions and qualifications contained throughout the Report. Key findings Desktop assessment The project area is located on the Spearwood Dunes landform system and consists of brown and yellow sands of varying depths over limestone. The project area slopes in an east to west direction towards Bruce Lee Reserve. No Local Water Management Strategies or Stormwater drainage studies were available for the study area. Broad scale pre-European vegetation mapping revealed one vegetation association within the project area: Jarrah, marri and wandoo Eucalyptus marginata, Corymbia calophylla, E. wandoo (association 998).
    [Show full text]
  • The Effect of Visual Capacity and Swimming Ability of Fish on the Performance of Light-Based Bycatch Reduction Devices in Prawn Trawls
    The effect of visual capacity and swimming ability of fish on the performance of light-based bycatch reduction devices in prawn trawls By Darcie Elizabeth Hunt Thesis submitted to the University of Tasmania in fulfilment for the requirements of the degree of Doctor of Philosophy. 2015 National Centre for Marine Conservation and Resource Sustainability (incorporated into the Institute of Marine and Antarctic Studies as of September 2014) 1 Declaration I hereby declare that this thesis contains no material which has been accepted for the award of any other degree or diploma at any university, except by way of background information and duly acknowledged in the thesis, and to the best of my knowledge contains no paraphrase or copy of material previously published or written by another person, except where reference is made in the text of the thesis, nor does the thesis contain any material that infringes copyright. The publishers of the paper comprising Chapter 4 hold the copyright for that content, and access to the material should be sought from the respective journals. The remaining non published content of the thesis may be made available for loan and limited copying and communication in accordance with the Copyright Act 1968. Candidate’s signature Darcie Elizabeth Hunt November 2015 2 Statement of Co-Authorship The following people and institutions contributed to the publication of work undertaken as part of this thesis: Candidate: Darcie E. Hunt, Institute for Marine and Antarctic Studies, University of Tasmania. Author 1: Dr Jennifer Cobcroft, Institute for Marine and Antarctic Studies, University of Tasmania. Author 2: Dr Giles Thomas, University College London.
    [Show full text]