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

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Contaminants in Tissue of Fish and Crabs Collected in the Gladstone Aream. Lead.Bundaberg Fitzroy R. The Narrows Port area Avg. s.e.Trip 1 0.166 ab 0.143 ab 0.073 b 0.064 b 0.043Trip 2 0.068 b 0.076 b 0.231 a 0.129 abThe results for lead need to be taken with some caution, as there were only four values recorded as‘> the level of resolution’ (on a wet-weight basis). For the remaining 36 values which were ‘< 0.05’(hence taken as 0.025), conversion from wet to dry-weight basis introduced reasonable variation, asthe moisture content varied quite widely - between 55% (where 0.025 converts to 0.056) and 82%(converts to 0.139). So whilst this data set appears to contain the usual amounts of variability,amongst which the analysis found some significant differences, in reality these are based on fewactual values. The observed distribution of these values also results in significant regionaldifferences (see Table 2.4). The lead values measured as ‘> the level of resolution’ were one eachfor Bundaberg and the Fitzroy River (both on trip 1), and one each for the Narrows and Port area(both on trip 2). All four of these crabs were rated as ‘normal’.This was not a problem with any other metal. Chromium was the only other one with any ‘< thelevel of resolution’ values, and had 20 of these along with 20 actual values, so constituted a validanalysis.Overall (multivariate patterns)Relationships amongst the metals can be measured by the correlation coefficient, r. Table 2.3 liststhese values, which show the direction and relative strength of these relationships.Table 2.3. Correlation matrix for the metals. Significant (P < 0.05) correlations have an absolutevalue > 0.310, and are indicated in bold.Aluminium 1.000Chromium 0.090 1.000Iron 0.022 0.295 1.000Nickel -0.057 0.157 -0.032 1.000Copper 0.138 -0.011 -0.158 0.319 1.000Zinc -0.128 -0.083 0.371 0.144 0.160 1.000Arsenic -0.022 0.211 0.436 0.100 0.055 0.443 1.000Selenium 0.102 0.303 0.367 0.453 0.425 0.361 0.602Silver 0.236 0.182 0.233 0.234 0.683 0.180 0.250Cadmium 0.202 0.116 0.320 0.018 0.228 0.266 0.312Barium 0.135 0.458 0.260 -0.156 0.111 0.118 0.193Mercury -0.044 -0.059 -0.021 -0.262 -0.065 -0.217 0.032Lead -0.042 0.402 0.363 -0.062 -0.097 -0.024 0.080Aluminium Chromium Iron Nickel Copper Zinc ArsenicSelenium 1.000Silver 0.391 1.000Cadmium 0.071 0.686 1.000Barium -0.066 0.381 0.583 1.000Mercury -0.038 0.214 0.339 0.176 1.000Lead 0.121 0.107 -0.086 0.138 0.000 1.000Selenium Silver Cadmium Barium Mercury LeadPage 37
Department of Science, Information Technology, Innovation and the ArtsThe principal components overall spatial representation for the 13 metals (Table 2.2) is shown inFigure 2.1.43Bundy2Dimension 2 (23% variation)210-1Narrows2Port2Bundy1Fitzroy2Fitzroy1-2Narrows1Port1-4 -3 -2 -1 0 1 2 3Dimension 1 (32% variation)Figure 2.1. Movements of the overall location and trip principal component means inmultidimensional space. The Gladstone sites are indicated by the circles with the solid lines, and thereference sites by the squares with the dotted lines.Summarising by regionsThe means for the individual locations can be combined into ‘Gladstone’ (Port area and theNarrows) vs. ‘Reference’ (Bundaberg and Fitzroy River), as listed in Table 2.4. The pooledstandard error for each mean was calculated according to the usual sum-of-variances method (Raj1968), and these were used to conduct a t-test for the degree of difference between these regionalmeans. In each of the trips, three of the six significant differences showed a higher level for thereference sites.Page 38
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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
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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
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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
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 185: 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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