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

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Contaminants in Tissue of Fish and Crabs Collected in the Gladstone AreaTable 4 – Disease status and mean concentrations of metals and metalloids (mg/kg) in the mud crabhepatopancreas (dry-weight basis). Metals and metalloids that have significantly differentconcentrations (P≤0.05) between healthy and diseased crabs are bolded and shaded in light blue.Metal MeanMeanAverage Significance Ratio of meanconcentration concentration Standard level (P) metalin healthy crabs in diseasedcrabsErrorconcentrationdiseased/healthyAluminium 12.9 21.6 2.5 0.021 1.67Arsenic 21.4 26.4 2.2 0.123 1.23Barium 1.26 1.47 0.25 0.554 1.17Cadmium 2.60 3.51 0.47 0.181 1.35Chromium 0.13 0.19 0.02 0.072 1.50Copper 630 670 125 0.826 1.06Iron 256 323 27 0.097 1.26Lead 0.12 0.09 0.02 0.282 0.75Nickel 2.57 2.77 0.39 0.727 1.08Mercury 0.27 0.29 0.03 0.665 1.06Selenium 6.30 7.69 0.38 0.016 1.22Silver 4.03 4.71 0.82 0.575 1.17Zinc 186 177 20 0.761 0.95Assessment was undertaken to determine whether there was a link between the significantlyhigher concentrations of aluminium and selenium in diseased crabs and location of the site. Thediseased crabs collected from the Fitzroy River had significantly (P≤0.05) higher aluminiumconcentrations in their hepatopancreas compared to diseased crabs at other sites (Table 5).However, this result should be interpreted with caution due to the low replication of diseased crabsper site (n=5). No significant relationship (P>0.05) was found between site and seleniumconcentrations in diseased crabs (Table 6).Table 5 – Aluminium concentrations (mg/kg) in the hepatopancreas of diseased and healthy crabs bysite (dry-weight basis, n=5). Sites that have a significant difference (P≤0.05) between healthy anddiseased crabs are bolded and shaded in light blue.MetalMeanconcentration indiseased crabsStandardErrorMeanconcentration inhealthy crabsStandardErrorBundaberg 14.61 4.49 13.70 4.49Fitzroy River 40.52 4.49 13.85 4.49The Narrows 14.60 4.49 10.24 4.49Port Development Area 16.55 6.06 12.96 3.76Page 9
Department of Science, Information Technology, Innovation and the ArtsTable 6 – Selenium concentrations (mg/kg) inn the hepatopancreas of o diseased and healthycrabs bysite (dry-weight basis, n=5).MetalMean StandardMean StandardconcentrationErrorconcentrationErrorin diseasedin healthyycrabscrabsBundabergFitzroy RiverThe NarrowsPort DevelopmentArea6.3997.3448.0009.5000.800.800.801.075.145.647.517.160.800.800.800.674.2.BarramundiDiseased fish were classified as any fish with a skin abnormality (including redness or lesions), eyelesions, swelling or unusual masss on the abdomen, signs of emaciation, or haemorrhagee from gillsor vent. There was nosignificant (P>0.05) associationbetween fish disease and measured metalconcentrations in barramundi gills (Table 7) or barramundi liver (Table 8). This indicates thatexposure to metals and metalloids overall iss unlikely to be contributing to immunosuppressiveeffects in Gladstone Harbour barramundi.Table 7 – Disease status and gill metal and metalloid concentrationss (mg/kg dry-weight basis). Nosignificant difference (P>0.05) between healthy and diseased fish were found. Measuredconcentrations of chromium, nickel, silver and lead weree generally below the limit of reporting andwere not included in this analysis.Metal Mean Meanconcentrationconcentrattionin healthy fish in diseasedfish fAluminium ArsenicBarium13.51.731.6418.13.341.26AverageSignificanceRatio of meanStandardlevel (P)Errormetalconcentrationdiseased/ /healthy2.60.3241.340.610.0981.930.580.6150.77Cadmiumm CopperIronMercurySeleniumZinc0. .0453.411890. .2862.9056.20.0755 4.953740.4000 3.5965.70. 0150.80800. 0410.364.00.1220.2080.1250.0520.2430.1311.661.451.981.401.241. 17Page 10
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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
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Figure 6. Eye condition observed in
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Conditions observed in barramundi s
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Figure 12. A barramundi caught in t
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provided another environmental stre
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was somewhat reduced because post-m
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4,000Commercial effort (days fished
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Size structure of mud crabs observe
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Figure 21. Examples of shell abnorm
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Of the 58 crabs observed to have sh
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HistopathologyLipid storage vacuola
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Commercial fishing effort for mulle
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Figure 28. (a) Mullet caught in Rod
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June/July: Mullet samples were coll
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Sharks and raysThe monitoring progr
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Observational findings Phase 1Phase
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Encysted larval parasites were foun
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in particular bull sharks, have bee
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Commercial banana prawn catch for t
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Observational findings Phase 2April
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Laboratory testing Phase 1Seven riv
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four displayed signs of redness. Th
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Conditions observed in pelagic fish
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FinfishObservational findingsDuring
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ConclusionsIn 2011, a wide range of
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Mud crabsFisheries Queensland did n
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Owens, L. 1983. Bopyrid isopod Epip
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Candidate speciesThe monitoring pro
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Table 1: Candidate species for each
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Sample processingSample processing
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Herring/grinner/Australian threadfi
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For example: the third specimen, re
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oooGonad - present/absentHepatopanc
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Cloudy eye,swollen,redness orhemorr
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Red pin pointmarks - nogeneral redn
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Lesion photos Description GradeThis
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L4continuedoperculumgrazing;cuts or
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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
Page 135 and 136: Standardized residualsStandardized
Page 137 and 138: Table 2.3f. Muscle lesions.Lake Fit
Page 139 and 140: Table 4. 1f. Muscle lesions.Fitzroy
Page 141 and 142: Table 5.6. Regiona l m eans for the
Page 143 and 144: Contaminants in Tissue ofFish and C
Page 145 and 146: Contaminants in Tissue of Fish and
Page 151 and 152: Department of Science, Information
Page 157: Department of Science, Information
Page 203 and 204: Appendix E - Time line BarraBy John
Page 205 and 206: friends. Rapidly rising flood water
Page 207 and 208: 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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