DOCSLIB.ORG

Assessing the Recreational Blue Swimmer Crab Fishery in Moreton

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Assessing the Recreational Blue Swimmer Crab Fishery in Moreton Fisheries Biology and Assessment of the Blue Swimmer Crab (Portunus pelagicus) in Queensland Wayne Sumpton Shane Gaddes Mark McLennan Matthew Campbell Mark Tonks Norm Good Wayne Hagedoorn Greg Skilleter Project No. 98/117 QO03002 ISSN 0727-6281 Agdex 476/06 Information contained in this publication is provided as general advice only. For application to specific circumstances, professional advice should be sought. The Department of Primary Industries, Queensland, has taken all reasonable steps to ensure that the information contained in this publication is accurate at the time of production. Readers should ensure that they make appropriate inquiries to determine whether new information is available on the particular subject matter. © The State of Queensland, Department of Primary Industries, and the Fisheries Research and Development Corporation, 2003 Copyright protects this publication. Except for purposes permitted by the Copyright Act, reproduction by whatever means is prohibited without prior written permission of the Department of Primary Industries, Queensland and the Fisheries Research and Development Corporation. Inquiries should be addressed to: Manager, Publication Production Department of Primary Industries GPO Box 46 Brisbane Qld 4001 TABLE OF CONTENTS LIST OF FIGURES…………………………………………………………………..………IV LIST OF TABLES…………………………………………………………………………….X NON-TECHNICAL SUMMARY………..……….….………………………………………..1 1. BACKGROUND.................................................................................................................... 3 2. NEED...................................................................................................................................... 4 3. OBJECTIVES........................................................................................................................ 4 4. HISTORY OF THE BLUE SWIMMER CRAB FISHERY IN QUEENSLAND............ 5 5. ANALYSIS OF COMMERCIAL CATCH AND EFFORT LOGBOOK DATA............ 7 Data Acquisition and Transformation ......................................................................................... 7 Species discrimination.................................................................................................................................7 Catch weight and catch numbers .................................................................................................................8 Irregular recording of total pot lifts .............................................................................................................8 Suspicious records.......................................................................................................................................9 Multiple records for one day .......................................................................................................................9 No grid location references..........................................................................................................................9 Spatial and temporal trends .........................................................................................................................9 Daily effort by commercial pot fishermen ................................................................................. 10 Changes in annual total catch and effort in the commercial pot fishery ................................ 12 Change in annual catch in the commercial trawl and pot fisheries......................................... 13 Monthly variation in catch and CPUE in the commercial pot fishery .................................... 14 State-wide changes in catch per boat day in trawl and pot fisheries....................................... 16 Discussion...................................................................................................................................... 20 6. IMPACT OF TRAWLING ON BLUE SWIMMER CRABS ......................................... 22 Introduction.................................................................................................................................. 22 Sustainability of the fishery......................................................................................................... 24 Catch sharing arrangements....................................................................................................... 25 Economic and marketing considerations (product quality)..................................................... 30 Gear conflicts between trawl/trap and recreational interests.................................................. 30 Discard mortality rate of adults and juveniles .......................................................................... 31 Habitat damage, ecological damage and mortality of juvenile blue swimmer crabs............. 32 Trawl logbook validation............................................................................................................. 34 Compliance Surveillance ............................................................................................................. 36 Discussion...................................................................................................................................... 38 7. FACTORS INFLUENCING CATCH OF BLUE SWIMMER CRABS IN MORETON BAY.................................................................................................................................. 41 Introduction.................................................................................................................................. 41 Materials and Methods................................................................................................................ 41 Statistical analysis .....................................................................................................................................42 Results ........................................................................................................................................... 42 Temperature at various sites within Moreton Bay;1999-2001 data series.................................................42 Modelling catch rates at sites within Moreton Bay ...................................................................................44 Modelling catch rates overall with remote auxiliary data..........................................................................46 Discussion...................................................................................................................................... 48 8. VARIATION IN PLANKTONIC AVAILABILITY AND JUVENILE ABUNDANCE OF BRACHYURAN CRABS IN MORETON BAY ................................................... 50 Introduction.................................................................................................................................. 50 Materials and Methods................................................................................................................ 50 Field Sampling...........................................................................................................................................50 Abiotic Data...............................................................................................................................................52 Results ........................................................................................................................................... 53 Discussion...................................................................................................................................... 59 9. GENERAL BIOLOGY OF BLUE SWIMMER CRABS IN QUEENSLAND .............. 60 Introduction.................................................................................................................................. 60 i Materials and Methods................................................................................................................ 60 Results ........................................................................................................................................... 61 Discussion...................................................................................................................................... 69 10. PARASITOLGY OF BLUE SWIMMER CRABS IN QUEENSLAND..................... 71 Distribution of barnacle symbionts of the crab Portunus pelagicus in the Moreton Bay region,............................................................................................................................................ 71 Introduction ...............................................................................................................................................71 Materials and Methods ..............................................................................................................................71 Results .......................................................................................................................................................73 Discussion .................................................................................................................................................79 Parasitism of blue swimmer crabs by Sacculina granifera and Ameson sp............................. 81 Introduction ...............................................................................................................................................81 Materials and Methods ..............................................................................................................................81
Load more

Recommended publications
  • Heavy Metals in the Sediments of Northern Moreton Bay, Queensland, Australia
    HEAVY METALS IN THE SEDIMENTS OF NORTHERN MORETON BAY, QUEENSLAND, AUSTRALIA James Peter Brady B Ed (Sec), B AppSc (Chem), M AppSci (Research)(Chemistry) Submitted in fulfilment of the requirements for the degree of Doctor of Philosophy School of Chemistry, Physics and Mechanical Engineering Science and Engineering Faculty Queensland University of Technology 2015 i Keywords Bioavailability assessment; Bramble Bay; Contamination; Deception Bay; Enrichment Factor; Fraction analysis; Heavy metal distribution; Heavy metal enrichment; Modified Pollution Index; Nemerow Pollution Index; Pollution index; Sediment quality guidelines; Source apportionment; X-ray Fluorescence. Heavy metals in the sediments of Northern Moreton Bay, Queensland, Australia i ii Abstract Moreton Bay is located 14 kilometres east of the Brisbane Central Business District in Queensland, Australia. The Northern half of Moreton Bay (north of the Brisbane River) encompasses Deception and Bramble Bays, which are sanctuaries to endangered wildlife and migratory seabirds, along with a significant seafood industry. There have been few attempts to assess heavy metal pollution in Moreton Bay, resulting in a lack of understanding of heavy metal sources, distributions, temporal behaviour and bioavailability. The lack of this information has resulted in limited capacity to accurately assess the risk human health from heavy metals present in Northern Moreton Bay and to the ecosystem. This is the first work since the late 1970’s to assess sediment contamination within Northern Moreton Bay, model the pollution sources and heavy metal distributions and finally propose improved Sediment Quality Guidelines, pollution indices and a routine heavy metals monitoring program in order to assess and monitor the risk posed by heavy metals in the weak acid soluble fraction of the sediments in Deception and Bramble Bays.
    [Show full text]
  • Houghton Highway Duplication Project: Construction Update
    Construction Update April 2010 Houghton Highway Duplication Project The Department of Transport and Main Roads is delivering the landmark $315 million Houghton Highway Duplication Project. The project involves construction of a new 2.7km road, cycle and pedestrian bridge between Brisbane and Redcliffe. ABOVE: Installation of a temporary steel falsework structure in progress alongside the Clontarf end of the old Hornibrook Bridge. This will be used to assist construction of a new recreational / fishing platform, which will extend 100m into Hays Inlet from the Clontarf portal of the old bridge. • Installation of a temporary steel falsework structure is Current works underway alongside the Clontarf end of the old Hornibrook Bridge. This structure will assist the project team to build a • Completion works for the new Ted Smout Memorial Bridge new recreational / fishing platform, which will extend 100m are continuing across Bramble Bay. The bridge is being into Hays Inlet from the Clontarf entry portal of the old bridge. progressively fitted-out with expansion joints, asphalt road Restoration of the heritage-listed entry portal is also underway. surface, concrete footpaths, traffic barriers, guard rails, electrical conduit, and overhead gantries. • Development of the northern embankment of the new Ted Smout Memorial Bridge is continuing at Clontarf Point. Works • Construction of the new Pine River fishing platform is in progress in this area include construction of foreshore continuing in the middle of the bay. The fishing platform is landscape features and the northern approach roads to the being built on the seaward side of the Ted Smout Memorial new bridge. Bridge, next to the main channel into the Pine River.
    [Show full text]
  • Brisbane Creeks – Bramble Bay Environmental Values and Water
    ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! B R I S B A N E C R E E K S — B R A M B L E B A Y , I N C L U D I N G B A L D H I L L S , C A B B A! G E T R E E , B R I S B A N E C R E E K S — B R A M B L E B A Y , I N C L U D I N G B A L D H ! I L L S , C A B B A G E T R E E , ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! D O W N F A L L , K E D R O N B R O O K , N U D G E E A N D N U N D A H C R E E K S ! ! ! ! ! ! Part of Basin 142 ! ! ! ! 153°E ! 153°10'E ! ! ! ROTHWELL ! ! ! KIPPA-RING ! DAKABIN NORTH LAKES ! ! ! ! REDCLIFFE ! SAMSONVALE ! ! KURWONGBAH ! ! Users must refer to plan WQ1441 ! MANGO for information on waters within ! HILL ! the Moreton Bay region. CLONTARF MARGATE ! ! ! Lake Kurwongba ! KALLANGUR ! WHITESIDE ! ! ! ! ! WOODY ! ! ! ! POINT ! ! ! ! ! ! ! ! ! MURRUMBA ! ! ! ! DOWNS ! Moreton Lake PETRIE Hays ! ! Inlet ! Samsonvale ! Bay ! GRIFFIN ! ! ! ! ! ! ! Pin ! e R ! iv ! er ! ! ! ! ! ! ! ! ! ! ! ! ! LAWNTON ! JOYNER ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! CASHMERE BRAY PARK ! ! ! MORETON BAY ! ! ! Cabbage Tree Creek ! ! ! REGIONAL ! estuarine and enclosed coastal ! ! ! ! ! ! ! !
    [Show full text]
  • Cross River Rail Environmental Impact Statement Technical Report
    Cross River Rail TECHNICAL REPORT NO.5 SURFACE WATER QUALITY JULY 2011 Contents 1 Introduction......................................................................................................1-1 1.1 Terms of Reference ......................................................................................................... 1-1 1.2 Methodology .................................................................................................................... 1-1 1.3 Study area........................................................................................................................ 1-1 2 Legislation, policies and support tools .........................................................2-2 2.1 National level framework ................................................................................................. 2-3 2.2 State level framework ...................................................................................................... 2-3 2.3 Regional and local framework ......................................................................................... 2-6 3 Existing environment ......................................................................................3-8 3.1 Lower Brisbane Catchment ........................................................................................... 3-10 3.1.1 Brisbane River ............................................................................................. 3-11 3.1.2 Breakfast and Enoggera Creek ..................................................................
    [Show full text]
  • Fadden Oxley Mcpherson Longman Brisbane Rankin
    Meldale Toorbul Wamuran ! Wamuran Basin B P Banksia Beach E D u E A m R i O c e B R s Braydon Beach U to n R e Bellara R U Ningi B ! ! M R Moodlu Bald Pocket I PROPOSED BOUNDARIES AND NAMES FOR S Comboyuro Point Spitfire Beach B R ISLAND A FISHER O R OAD ! Woorim N Campbells Pocket A FEDERAL ELECTORAL DIVISIONS IN QUEENSLAND P E E D a s s Mount Mee IE a IB g Y Y LONGMAN BR Map of the proposed Divisions of : e O Sandstone Point C ! ! ! L I Bongaree K LAKE Caboolture Skirmish Point BLAIR (PART),BONNER BONNER (PART), BOWMAN, BRISBANE, DICKSON, FADDEN, SOMERSET Bellmere LONGMAN Godwin FORDE, GRIFFITH, LILLEY, LONGMAN (PART), MCPHERSON, MONCRIEFF, Beach Bald Point MORETON, OXLEY, PETRIE, RANKIN, RYAN and WRIGHT (PART) Red Beach Warrajamba Beach Rocksberg South Point ( Sheet 3 of 3 ) Morayfield BONNER ! # Mount Byron Upper Caboolture Boundaries of proposed Divisions shown thus W K K O S N O Boundaries of existing Divisions shown thus E o D r F This map has been produced by Terranean Mapping Pty Ltd B Cowan Cowan t h O R R ! Boundaries of Local Government Areas thown thus D D D ! Beachmere from data sourced from Geoscience Australia and Australian MORETON BAY REGIONAL U A O C R Electoral Commision. E E Disclaimer The Redistribution Committee for Queensland made its proposed redistribution of the federal electoral boundaries for Queensland. This map is one of a series of four that shows the namesEager and boundariesBeach of the proposed Electoral Divisions.
    [Show full text]
  • Surface Water Quality
    Airport Link SURFACE WATER TECHNICAL REPORT NO 4 October 2006 Contents 1. Executive Summary 1-1 2. Existing Environment 2-2 2.1 Waterway Descriptions 2-3 2.1.1 Enoggera Creek/Breakfast Creek 2-3 2.1.2 Kedron Brook 2-3 2.2 Regulatory Framework 2-4 2.2.1 Environmental Protection (Water) Policy 1997 2-4 2.2.2 Water Act 2000 2-4 2.3 Water Quality Guidelines 2-5 2.3.1 ANZECC 2000 2-5 2.3.2 EPP(Water) 2006 2-5 2.3.3 BCC WQO 2000 2-6 2.4 Environmental Values and Water Quality Objectives 2-6 2.5 Water Quality Assessment 2-9 2.5.1 Enoggera Creek 2-11 2.5.2 Kedron Brook 2-12 2.6 Document Review 2-14 2.6.1 Healthy Waterways Partnership EHMP 2-14 2.6.2 City Wide Assessment of Water Quality in Brisbane’s Creeks 2-15 2.6.3 Breakfast/Enoggera Creek Waterway Management Plan 2-15 2.6.4 SEQ Regional Water Quality Management Strategy (Moreton Bay Waterways and Catchments Partnership, 2001) 2-15 2.6.5 Brisbane River Water Resource Plan 2-16 2.6.6 Kedron Brook Waterway Health Assessment 2-16 2.7 Existing Environment Summary 2-17 3. Impacts and Mitigation 3-18 3.1 Enoggera Creek Potential Impacts 3-18 3.1.1 Potential Construction Impacts 3-18 3.1.2 Potential Operational Impacts 3-19 3.2 Kedron Brook Potential Impacts 3-20 3.2.1 Potential Construction Related Impacts 3-20 3.2.2 Potential Operation Related Impacts 3-21 3.3 Summary of Potential Impacts 3-21 3.4 Mitigation Measures 3-22 3.4.1 Design 3-22 3.4.2 Construction 3-23 3.4.3 Construction Water Quality Monitoring Program 3-23 3.4.4 Operation 3-24 4.
    [Show full text]
  • Of Moreton Bay, Queensland Patricia KOTT Honorary Associate, Queensland Museum, PO Box 3300, South Brisbane, Qld 4101
    VOLUME 54 Part 3 MEMOIRS OF THE QUEENSLAND MUSEUM BRISBANE 30 DECEMBER 2010 © Queensland Museum PO Box 3300, South Brisbane 4101, Australia Phone 06 7 3840 7555 Fax 06 7 3846 1226 Email [email protected] Website www.qm.qld.gov.au National Library of Australia card number ISSN 0079-8835 NOTE Papers published in this volume and in all previous volumes of the Memoirs of the Queensland Museum may be reproduced for scientific research, individual study or other educational purposes. Properly acknowledged quotations may be made but queries regarding the republication of any papers should be addressed to the Editor in Chief. Copies of the journal can be purchased from the Queensland Museum Shop. A Guide to Authors is displayed at the Queensland Museum web site www.qm.qld.gov.au/organisation/publications/memoirs/guidetoauthors.pdf A Queensland Government Project Typeset at the Queensland Museum A review of the Ascidiacea (Tunicata) of Moreton Bay, Queensland Patricia KOTT Honorary Associate, Queensland Museum, PO Box 3300, South Brisbane, Qld 4101. Email: [email protected] Citation: Kott, P. 2010 12 30. A review of the Ascidiacea (Tunicata) of Moreton Bay, Queensland. In, Davie, P.J.F. & Phillips, J.A. (Eds), Proceedings of the Thirteenth International Marine Biological Workshop, The Marine Fauna and Flora of Moreton Bay, Queensland. Memoirs of the Queensland Museum – Nature 54(3): 287-297. Brisbane. ISSN 0079-8835. ABSTRACT A review of the 95 species of the Ascidiacea recorded from Moreton Bay, Queensland shows that solitary species of Phlebobranchia and Stolidobranchia (53 species) dominate the fauna, there being few colonial species of either suborder and only 30 species of the almost exclusively colonial Aplousobranchia, eight being species of the Didemnidae recorded only from locations immediately to the north of the Bay rather than in its semi-enclosed waters.
    [Show full text]
  • Vintagevintage NEW YOU! ROCKSROCKS Fine Dining Awards Our House on the Hill Fundraiser
    FREE FEBRUARY 2020 GUIDE Find Your Next Outdoor Adventure at Expo 5 VALENTINE'S CLICHÉS TO AVOID GO PRO NEW YEAR VintageVintage NEW YOU! ROCKSROCKS Fine Dining Awards Our House on the Hill fundraiser TRADES & HOME SERVICES Local DIRECTORY INSIDE DINING photo by Ben McShea GUIDE NEW, DEMO & USED VEHICLES STATE-OF-THE-ART SERVICING WORKSHOP & MOBILE SERVICING VAN FLEET & GENUINE PARTS keystar.com.au 1300 KEYSTAR KIPPA-RING: 318 - 320 Anzac Avenue ROTHWELL: 735 - 739 Deception Bay Road MORAYFIELD: 247 - 249 Morayfield Road KALLANGUR: 1452 Anzac Avenue KELVINATOR DAIKIN CORA INC GST INC GST 2.5KW $1266.00 2.5KW $1550.00 3.5KW $1377.00 3.5KW $1730.00 5.0KW $1644.00 5.0KW $2105.00 $ .00 $ .00 NEW, DEMO & USED VEHICLES 7.1KW 1838 7.0KW 2465 $ .00 $ .00 STATE-OF-THE-ART SERVICING WORKSHOP 9.0KW 2425 8.0KW 3000 & MOBILE SERVICING VAN FLEET & GENUINE PARTS with ceiling fans from keystar.com.au 1300 KEYSTAR 5 YEAR MANUFACTURER’S WARRANTY $250.00 inc GST standard *STANDARD INSTALL ONLY / install only/ 3 year CONDITIONS APPLY warranty terms and KIPPA-RING: 318 - 320 Anzac Avenue Conditions Apply. ROTHWELL: 735 - 739 Deception Bay Road MORAYFIELD: 247 - 249 Morayfield Road KALLANGUR: 1452 Anzac Avenue FEBRUARY 2020 3 FEBRUARY 2020 Contents 6 VINTAGE ROCKS Our House on the Hill fundraiser – a 6 fabulous and fun event raising funds and awareness for a good cause. 8 FIND YOUR NEXT OUTDOOR ADVENTURE AT EXPO Kick-start 2020 by heading down to the Moreton Bay Caravan, Camping, Boating & 4x4 Expo. 10 EDIT TATTOO REMOVAL Kelly Lojen has spent the past seven years painstakingly removing regretted 8 tattoos from the skin of local residents.
    [Show full text]
  • Brisbane City Plan, Appendix 2
    Introduction ............................................................3 Planting Species Planning Scheme Policy .............167 Acid Sulfate Soil Planning Scheme Policy ................5 Small Lot Housing Consultation Planning Scheme Policy ................................................... 168a Air Quality Planning Scheme Policy ........................9 Telecommunication Towers Planning Scheme Airports Planning Scheme Policy ...........................23 Policy ..................................................................169 Assessment of Brothels Planning Scheme Transport, Access, Parking and Servicing Policy .................................................................. 24a Planning Scheme Policy ......................................173 Brisbane River Corridor Planning Scheme Transport and Traffic Facilities Planning Policy .................................................................. 24c Scheme Policy .....................................................225 Centre Concept Plans Planning Scheme Policy ......25 Zillmere Centre Master Plan Planning Scheme Policy .....................................................241 Commercial Character Building Register Planning Scheme Policy ........................................29 Commercial Impact Assessment Planning Scheme Policy .......................................................51 Community Impact Assessment Planning Scheme Policy .......................................................55 Compensatory Earthworks Planning Scheme Policy .................................................................
    [Show full text]
  • Construction Update
    Construction update October 2009 Houghton Highway Duplication Project This update has been prepared for people with an interest in the delivery of the landmark $315 million Houghton Highway Duplication Project, which involves construction of a new 2.7km road, cycle and pedestrian bridge between Brisbane and Redcliffe. The project is being undertaken by Main Roads and its construction contractor, the Hull Albem Joint Venture, and is scheduled for completion in mid 2011 (weather permitting). ABOVE: ANOTHER NEW SPAN OF THE TED SMOUT MEMORIAL BRIDGE TAKES SHAPE IN BRAMBLE BAY. Current works Construction of the Ted Smout Memorial Bridge is continuing in Bramble Bay. Fifty-six of its 78 spans have now been built off the Brighton foreshore, and stretch almost 2 km across the bay towards Clontarf. These are being progressively fitted with concrete barriers, guard rails, and electrical conduit. Another five new spans are currently under construction, in various stages of completion. Construction of the new Pine River Fishing Platform is also continuing in Bramble Bay. The platform is being built on the seaward side of the Ted Smout Memorial Bridge, next to the main channel into the Pine River. A wheelchair-accessible walkway will connect the platform to a shared pedestrian / cycle path that runs along the length of the new bridge. Construction of new pedestrian / cycle underpasses is in progress at both ends of the Houghton Highway. The underpasses will run beneath the existing Houghton Highway bridge and the new Ted Smout Memorial Bridge. Construction update Development of the northern embankment of the new Ted Smout Memorial Bridge is in progress at Clontarf Point.
    [Show full text]
  • Project Description: Runway Layout
    VOLUME A: BACKGROUND AND NEED A4 Project Description: Runway Layout NEW PARALLEL RUNWAY DRAFT EIS/MDP FOR PUBLIC COMMENT A4-123 VOLUME A: BACKGROUND AND NEED A4 Project Description: Runway Layout CONTENTS 4.8 Subsurface and Geotechnical Conditions 141 Part 1 – Permanent Works 126 4.8.1 Geotechnical Investigations 141 4.1 Existing Development 128 4.8.2 Ground Conditions 141 4.1.1 Existing Infrastructure on Airport 128 4.8.3 Subsurface Channels 142 4.2 Description of the 4.8.4 Engineering Design Considerations142 New Parallel Runway 128 4.8.5 Construction Timing 143 4.3 Site Planning 128 4.8.6 Adopted Geotechnical Design 143 4.3.1 Introduction 128 4.9 Airport Drainage 144 4.3.2 New Parallel Runway 4.9.1 Major Tidal Channels 144 Design Standards 131 4.9.2 Secondary Channels 147 4.4 Preliminary Design Process 131 4.9.3 Local Non-Tidal Channels 149 4.5 Existing Airport Conditions 132 4.9.4 Detention Storage and Vegetated Buffer 149 4.5.1 Site History 132 4.9.5 Hydraulic Structures 150 4.5.2 Environmental Condition 132 4.9.6 Water Quality During Operations 150 4.6 Design Requirements 133 4.10 Dryandra Road Tunnel 151 4.6.1 Runway Location 133 4.10.1 Existing Dryandra Road 151 4.6.2 Design Aircraft and Traffic 133 4.10.2 Dryandra Road Alignment 151 4.6.3 Geometric Design 133 4.10.3 Future Land Use and Demand 151 4.6.4 Runway Length 133 4.10.4 Engineering Design 152 4.6.5 Runway Width 134 4.6.6 Taxiways 134 4.11 Perimeter Roads 153 4.6.7 Rapid Exit Taxiways 136 4.12 Security Fencing 153 4.6.8 Link Taxiway 136 4.13 Airport Lighting 154 4.6.9 Existing
    [Show full text]
  • The Effects of Floods on Estuarine Fisheries and Food Webs
    The Effects of Floods on Estuarine Fisheries and Food Webs Kaitlyn O’Mara B. Adv. Marine Sc (Hons) Thesis submitted in fulfilment of the requirements of the degree of Doctor of Philosophy, September 2019 Australian Rivers Institute School of Environment and Science Griffith University Abstract Floods are extreme events that can rapidly alter water and habitat quality in receiving estuaries. Because floods are unpredictable, they are more difficult to study, so have received less research attention than freshwater flow studies, resulting in a paucity of information on their ecological effects in the coastal zone. Previous studies have shown correlations between high flow periods and increased fisheries catches, which suggests that floods stimulate productivity in receiving waters. However, there have been no studies providing direct links between floods and increased productivity responses in fisheries species. In addition, the long-term effects of deposited flood sediment on food webs in estuaries are poorly understood. Floodwaters can carry high loads of fine sediment, which settles at the most offshore portion of the estuary delta, known as a prodelta. Nutrients, trace elements and other substances are also exported from the catchment dissolved in floodwater or attached to fine sediment particles and are deposited in estuaries. However, the processes of nutrient release from suspended sediments and settled sediments, and uptake of nutrients and trace elements into the food web in receiving estuaries are not well understood. Therefore, this thesis used laboratory experiments (Chapter 2 & 3) to study these processes with the aim of gaining a better understanding of the mechanisms underpinning measured ecological flood responses using field studies (Chapter 4 & 5).
    [Show full text]