Gladstone Fish Health Investigation 2011 - 2012 - Western Basin ...

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Appendix A – Methods for Expanded Fish HealthSampling ProgramAnimal ethicsThe expanded fish health sampling program was conducted under the provision of AnimalEthics Approvals Ref# CA 2011/10/554 and CA 2012/04/605.Study areaThe principal study area was Gladstone Harbour and surrounding waters, as defined by theFisheries (Gladstone Harbour and Surrounding Waters) Emergency Disease and QuarantineDeclaration 2011. This area includes significant waterways, including the Narrows, GrahamCk (Curtis Island), Calliope River, Auckland Ck, South Trees Inlet, Boyne River, ColosseumInlet, Seven Mile Ck, Rodds Bay and Rodds Harbour. Sampling took place at a range of siteswithin the principal study area, and the locations of these sites are shown in Figure A-1. Thesites are the Narrows, Port Development Area, Hamilton Point (including waters east toEnfield creek), Calliope River (including Wiggins Island), Gladstone Harbour (trawl), SpoilGround, Upper Boyne River, Lower Boyne River and Rodds Bay.Figure A-1. Sampling sites (including reference sites) monitored during the program.The main reference sites (i.e. for comparison with the study area) for the scheduledmonitoring program include the nearby Fitzroy River (including Port Alma) to the north, andBundaberg with its adjacent coastal waters and estuaries to the south. Opportunistic datacollection also occurred in a variety of sites throughout the state, depending on routineactivity in the Fisheries Queensland Observer Program and other sampling programs.79
Candidate speciesThe monitoring program focussed on seven species of finfish, one species of shark, onespecies of prawn, and one species of crab. These species represent a range of different lifecycles (e.g. catadromous and estuarine) and trophic levels (e.g. predatory, omnivorousdetritivores and scavengers). They are species that have been encountered during regularsampling in the principal study area and reference areas to date (i.e. since October 2011),are caught using a range of different methods/fishing gear, and have displayed a variety ofabnormalities.Barramundi (Lates calcarifer)Barramundi is a highly predatory species and a principle target in the region for recreationalline and commercial net fishers. It is catadromous, in that fish live in fresh and marine waters,but must migrate to marine waters to spawn. Barramundi fingerlings are stocked intofreshwater impoundments throughout the Port Curtis and Fitzroy River catchments, includingAwoonga Dam.Mullet (Mugilidae)Mullet is an omnivorous detritivore with a catadromous lifecycle. The species is caughtmainly by commercial net fishers, although smaller numbers are also caught by recreationalfishers (mainly for bait) using cast nets. Sea mullet have been stocked into Lake Awoonga.Banana prawn (Fenneropenaeus merguiensis)Banana prawns are omnivorous detritivores and a principle target for the commercial trawlfishery in the region, as well as for recreational fishers using cast nets. Banana prawns usethe numerous intertidal mangrove lined creeks as nursery habitats, then move into morecoastal waters as they grow.Mud crab (Scylla serrata)Mud crab is the principle target species for recreational and commercial crabbers in theregion. The species is an active omnivorous scavenger that occurs in estuarine and coastalhabitats with mud substratum.Bull shark (Carcharhinus leucas)Bull shark is a predatory estuarine and coastal species caught frequently in the region bycommercial net fishers and recreational line fishers. The species is known to migrate intofreshwater, particularly as juveniles.Trawl species: Grinner (Saurida sp), Australian threadfin (Polydactylus multiradiatus)and Castelnau’s herring (Herklotsichthys castelnaui)These three taxa are small in size and common in the local demersal fish assemblages,which makes them common in bycatch of trawlers operating inside the study area. They arecaught occasionally by recreational anglers.Pelagic species: Queenfish (Scomberoides sp.)Queenfish is a pelagic species occurring throughout the region and commonly caught inbarramundi nets. In previous sampling it had shown some signs of redness and fish hadbeen found with a high prevalence of ectoparasites.80
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Department of Agriculture, Fisherie
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ContentsTable of tables 1Table of f
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Mullet (Mugilidae) 80Banana prawn (
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Figure 7. Barramundi caught in the
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Figure 38. Sharks caught in the Cal
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Phase 1 (August 2011-February 2012)
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The results in this study support t
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ecognised expertise and research pu
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Mr Mitchell reported high catches u
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Figure 2. Sampling sites within the
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Phase 2: Expanded Gladstone Fish He
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Mud crab (Scylla serrata): Mud crab
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For mud crabs, hepatopancreas, gill
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Table 2. The number of fish, crusta
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Significant findings and discussion
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Commercial barramundi catch and cat
Page 33 and 34: Figure 6. Eye condition observed in
Page 35 and 36: Conditions observed in barramundi s
Page 37 and 38: Figure 12. A barramundi caught in t
Page 39 and 40: provided another environmental stre
Page 41 and 42: was somewhat reduced because post-m
Page 43 and 44: 4,000Commercial effort (days fished
Page 45 and 46: Size structure of mud crabs observe
Page 47 and 48: Figure 21. Examples of shell abnorm
Page 49 and 50: Of the 58 crabs observed to have sh
Page 51 and 52: HistopathologyLipid storage vacuola
Page 53 and 54: Commercial fishing effort for mulle
Page 55 and 56: Figure 28. (a) Mullet caught in Rod
Page 57 and 58: June/July: Mullet samples were coll
Page 59 and 60: Sharks and raysThe monitoring progr
Page 61 and 62: Observational findings Phase 1Phase
Page 63 and 64: Encysted larval parasites were foun
Page 65 and 66: in particular bull sharks, have bee
Page 67 and 68: Commercial banana prawn catch for t
Page 69 and 70: Observational findings Phase 2April
Page 71 and 72: Laboratory testing Phase 1Seven riv
Page 73 and 74: four displayed signs of redness. Th
Page 75 and 76: Conditions observed in pelagic fish
Page 77 and 78: FinfishObservational findingsDuring
Page 79 and 80: ConclusionsIn 2011, a wide range of
Page 81 and 82: Mud crabsFisheries Queensland did n
Page 83: Owens, L. 1983. Bopyrid isopod Epip
Page 87 and 88: Table 1: Candidate species for each
Page 89 and 90: Sample processingSample processing
Page 91 and 92: Herring/grinner/Australian threadfi
Page 93 and 94: For example: the third specimen, re
Page 95 and 96: oooGonad - present/absentHepatopanc
Page 97 and 98: Cloudy eye,swollen,redness orhemorr
Page 99 and 100: Red pin pointmarks - nogeneral redn
Page 101 and 102: Lesion photos Description GradeThis
Page 103 and 104: L4continuedoperculumgrazing;cuts or
Page 105 and 106: Appendix A-3: Fish health assessmen
Page 107 and 108: Appendix B - Statistical report: Gl
Page 109 and 110: analyses, but this was not done for
Page 111 and 112: was a significant (P < 0.05) locati
Page 113 and 114: Percentage with fin condition > 015
Page 115 and 116: Table 3.6b. Effects of locations an
Page 117 and 118: Table 3.7d. Spleen categories - cou
Page 119 and 120: 32Bundy2Bundy1UpBoyne1UpBoyne2LwBoy
Page 121 and 122: Table 3.9c. Regional group means an
Page 123 and 124: Table 4.2c. Effects of locations an
Page 125 and 126: 4.5 Summarising by regionsThe means
Page 127 and 128: Ta ble 5.2a. Effects of locations a
Page 129 and 130: 5.5 Summarising by regionsThe means
Page 131 and 132: 6.3 ResultsThere was no significant
Page 133 and 134: Table 6.5 lists the mean values whe
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Standardized residualsStandardized
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Table 2.3f. Muscle lesions.Lake Fit
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Table 4. 1f. Muscle lesions.Fitzroy
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Table 5.6. Regiona l m eans for the
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Contaminants in Tissue ofFish and C
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Contaminants in Tissue of Fish and
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Department of Science, Information
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Appendix E - Time line BarraBy John
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friends. Rapidly rising flood water
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To make note - condition loss was e
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May/June- FinsMy initial observatio
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Thes e escapee were now also in awo
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Figure N. Barramundi showing net ma
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September- Deaths and SicknessFigur
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There is numerous distinguishing fe
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Department of Agriculture, Fisherie
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Gladstone Fish Health Investigation 2011 - 2012 - Western Basin ...

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