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

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Contaminants in Tissue of o Fish and Crabs Collectedin the Gladstone Area6.4. SummaryArsenic, cadmium, iron and zinc were identified as being sometimes significantly elevated in thebarramundi livers collected at Gladstone sites compared to references sites. A comparison withdata retrieved from the Environmental Residue and Effects Database(http://el.erdc.usace.army.mil/ered/) revealed that:• Thevast majority of samples had arsenic, cadmium and zinc concentrations which werebelow the concentrationsassociatedd with toxicological effects.• This combinedwith the lack of statistical significance between fish disease and metalconcentrationindicated that it is unlikely that metals and metalloids are associated with fishdisease in Gladstone Harbour.Comparison with immunosuppression data indicated that it is unlikely that cadmium or zinc wererelated to fish diseasee in Gladstone Harbourr (DISITIA in prep). No data were available for arsenicand iron.Page 29
Department of Science, Information Technology, Innovation and the Arts7. ConclusionsThere was no indication of elevated metals and metalloids in the tissues of diseased barramundicompared to healthy barramundi collected in the Gladstone area. Significantly higher arsenic,cadmium, iron and zinc concentrations were found in barramundi livers from at least one samplingtrip in the Gladstone area, indicating possible elevated exposure to these metals and metalloids.The measurement of elevated concentrations of these metals and metalloids does not necessarilyindicate a toxicological problem, but does indicate exposure. Comparison of concentrations ofthese metals and metalloids in barramundi livers with toxicological effects data did not, overall,indicate that the concentrations in the barramundi liver were of concern. In addition, as there wereno significant associations between these metals and metalloids and fish health, it is unlikely thatthey are associated with the fish health in Gladstone Harbour.Analysis of crabs from both Gladstone Harbour and reference sites found a significant associationof aluminium and selenium concentrations and disease. Concentrations of metals and metalloids inmud crab hepatopancreas detected in the Gladstone area were similar to sites along the eastcoast of Queensland. The available data also indicated that the suite of organic chemicals testedfor did not contribute to the crab disease.All grinner were assessed as being healthy so the existence relationships between metalconcentrations and observed fish health could not be assessed for this species.Overall, there is no strong evidence of a link between fish health at the time of sampling and tissueresidue concentrations.Page 30
Page 1 and 2:
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
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Appendix B - Statistical report: Gl
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analyses, but this was not done for
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was a significant (P < 0.05) locati
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Percentage with fin condition > 015
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Table 3.6b. Effects of locations an
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Table 3.7d. Spleen categories - cou
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32Bundy2Bundy1UpBoyne1UpBoyne2LwBoy
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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
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 177: 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
Page 209 and 210: May/June- FinsMy initial observatio
Page 211 and 212: Thes e escapee were now also in awo
Page 213 and 214: Figure N. Barramundi showing net ma
Page 215 and 216: September- Deaths and SicknessFigur
Page 217 and 218: There is numerous distinguishing fe
Page 219: Department of Agriculture, Fisherie
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