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

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etween sites is normal and expected. This data indicates that the grinner caught inGladstone Harbour had not been exposed to any chronic elevated levels of metals.PelagicsSampling sites for pelagic fish species during Phase 1 included the Calliope River, GladstoneHarbour, Boyne River (upper and lower reaches), Rodds Bay, the Spoil Grounds as well asthe Fitzroy River and Bundaberg (reference sites).Sampling sites for pelagic fish species during Phase 2 included the Calliope River, BoyneRiver (lower reaches), Spoil Grounds, as well as the Fitzroy River and Bundaberg (referencesites). The candidate pelagic species for Phase 2 were queenfish due to conditions observedin this species during Phase 1 (Figure 45).Figure 45. Queenfish caught at Bundaberg during the sampling program.Observational findings Phase 1During October 2011, golden trevally (1), snubnosed dart (2) and queenfish (2) were caughtin Rodds Bay while targeting barramundi. These fish were all considered to be in good healthwith no signs of redness or lesions observed. A giant trevally was also caught in the upperreaches of the Boyne River that had minor redness.During November 2011, while conducting a targeted prawn survey in the Harbour, onequeenfish was captured and displayed damage to the snout and lower jaw, with someassociated minor redness. Twenty small trevally (mixed species) were also caught during thetrawl survey, but all were described as being in good health with no discolouration or lesions.A single queenfish was also caught during netting activities with no signs of ill health.During December 2011, an oxeye herring caught in the Boyne River and a queenfish caughtin Rodds Bay showed no signs of ill health. Sampling in the Calliope River caught a singleoxeye herring observed to be in good health, however two of the six queenfish caught wereobserved to have skin discolouration with minor redness or red pin point marks on the bodyor fins.During net sampling in January 2012, three golden trevally were caught in Bundaberg, twoqueenfish in the Calliope River and two queenfish in the Boyne River. None of these fishshowed external signs of ill health. At the Spoil Ground, 42 queenfish were caught, of which67
four displayed signs of redness. These fish were also infected with calanoid copepods, with41 of the 42 queenfish having copepods present on the body surface.During February 2012, observations were conducted aboard commercial net fishingoperations at Rodds Bay and at Colosseum (halfway between Rodds Bay and the mouth ofthe Boyne River). Two of the 18 golden trevally caught showed minor redness ventrally,while all five giant trevally caught were in good condition. All 40 snubnosed dart and 32queenfish caught were in good health. No parasites were obvious on the skin of thequeenfish examined. These results were recorded as Rodds Bay and summarised withPhase 1 data in Figure 46.Conditions observed in pelagic fish species at each site Phase 1Skin Colour NormalSkin Minor RednessNumber of fish454035302520151050Oxeye Herring(n = 1)Queenfish(n = 8)Queenfish(n = 1)Trevally(n = 20)Giant Trevally(n = 1)Queenfish(n = 2)Oxeye Herring(n = 1)Queenfish(n = 42)Giant Trevally(n = 6)Golden Trevally(n = 17)Snubnosed Dart(n = 42)Queenfish(n = 35)Golden Trevally(n = 3)Queenfish(n = 1)Calliope River Gladstone Harbour upper Boyne River lowerBoyneRiverSpoilGroundRodds BayBundabergSpecies and LocationFigure 46 . Conditions observed in queenfish and other pelagic species at each site during Phase 1. Note,(n) refers to the total number of fish examined at each site.Histopathology and residue testing Phase 1Two trevally and two queenfish were submitted to the Biosecurity Queensland laboratoryduring Phase 1. The trevally were submitted due to their skin redness. One of these trevallywas provided in a private submission. Mild inflammation of the dermis and loss of epidermiswas observed, but no bacterial or fungal pathogen was identified in the skin lesions. Twoencysted parasites were found in the dermal layer of skin from one trevally.The queenfish were submitted in response to concerns about cyanide discharge from localindustry. The fish were effectively normal based on necropsy and histological examinations.68
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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
Page 21 and 22: Phase 2: Expanded Gladstone Fish He
Page 23 and 24: Mud crab (Scylla serrata): Mud crab
Page 25 and 26: For mud crabs, hepatopancreas, gill
Page 27 and 28: Table 2. The number of fish, crusta
Page 29 and 30: Significant findings and discussion
Page 31 and 32: 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: Laboratory testing Phase 1Seven riv
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 and 84: Owens, L. 1983. Bopyrid isopod Epip
Page 85 and 86: Candidate speciesThe monitoring pro
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
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Table 4.2c. Effects of locations an
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4.5 Summarising by regionsThe means
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Ta ble 5.2a. Effects of locations a
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5.5 Summarising by regionsThe means
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6.3 ResultsThere was no significant
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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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