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

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Table of tablesTable 1. Number of fish from each site and sampling trip used for histopathology andchemical residue testing. Note: 1 Denotes Gladstone Harbour and adjacent waterways, 2denotes reference sites. Note due to low sample numbers, sharks were used for histologyonly. 21Table 2. The number of fish, crustaceans and molluscs observed during Phase 1 and 2 ofthe Gladstone Fish Health Investigation. Note * indicates multiple species included incategory 22Table 3. Numbers of samples tested by Biosecurity Queensland during Phase 1. 23Table 4. Numbers of samples used for necropsy examination during Phase 2. 23Table 5. Highest lesion grade for each crab as assessed by Fisheries Queensland in the fieldand Biosecurity Queensland in the laboratory. The grey numbers indicate agreementbetween the two assessments. 44Table 6. Mean values and standard errors (s.e.) for the crab categories. 45Table 7. Mean values and average standard errors for hepato-somatic index and per centabnormal for each location and sampling event. 45Table 8. Lesion categories as observed in the field, according to categories described byAndersen, 2001. Where individual crabs had more than one lesion, only the most severelesion was included. 45Table 9. The sharks and rays observed during Phase 1. 56Table of figuresFigure 1. A school of large fish in the Boyne River detected on a fish finder duringrecreational fishing in 2011. 11Figure 2. Sampling sites within the principal study area. 14Figure 3. The annual catch and catch per unit effort of barramundi from the Gladstone region(CFish grid S30), as reported in commercial fisher logbooks (calendar years 2000 – 2012). 26Figure 4. The number of days fishing where commercial fishers have reported barramundifrom the Gladstone region (CFish grid S30), as reported in commercial fisher logbooks(calendar years 2000 – 2012). 26Figure 5. Skin condition observed in barramundi at each site sampled during Phase 1 of fishhealth investigations, September 2011 – February 2012. Note, (n) refers to the total numberof fish examined at each site. 27Figure 6. Eye condition observed in barramundi at each site sampled during Phase 1 of fishhealth investigations, September 2011 – February 2012. Note, (n) refers to the total numberof fish examined at each site. 281
Figure 7. Barramundi caught in the Boyne River showing physical damage consistent withbeing washed over the Awoonga spillway 29Figure 8. Conditions observed (skin colour and lesions) in barramundi sampled at each siteduring April 2012, Phase 2. Note, (n) refers to the total number of fish examined at each site.Some fish may have been observed with multiple conditions. 30Figure 9. Barramundi caught while trawling in the Gladstone Harbour. 30Figure 10. A barramundi caught in the Boyne River during the June/July 2012 samplingevent with recovering injuries to the jaw and body. 31Figure 11. A barramundi caught in the Burnett River, Bundaberg, during the June/July 2012sampling event with an old injury in an advanced stage of healing. Note the new skincompletely covering the old injury with new scales forming over the affected area. 31Figure 12. A barramundi caught in the Calliope River during the June/July 2012 samplingevent with an old injury in an advanced stage of healing. Note the new skin completelycovering the old injury. 32Figure 13. Conditions observed (skin colour and lesions) in barramundi sampled at each siteduring June/July, Phase 2. Note, (n) refers to the total number of fish examined at each site.Some fish may have been observed with multiple conditions. 32Figure 14. Levels of mesentery fat in barramundi from Gladstone sites, according to theirlesion scores as recorded during necropsy. 35Figure 15. The annual catch of mud crabs from the Gladstone region (CFish grid S30), asreported in commercial fisher logbooks (calendar years 2000 – 2012). 37Figure 16. The number of days fishing where commercial fishers have reported mud crabfrom the Gladstone region (CFish grid S30), as reported in commercial fisher logbooks(calendar years 2000 – 2012). 38Figure 17. The size structure of mud crabs observed at each site during the Gladstone FishHealth Monitoring Program Phase 1, December 2011 – January 2012. Note, (n) refers to thetotal number of crabs examined at each site. 39Figure 18. The size structure of mud crabs observed in the Gladstone region (sitescombined) and the reference sites during the Gladstone Fish Health Monitoring ProgramPhase 2, April 2012 – July 2012. Note, (n) refers to the total number of crabs examined ateach site. 39Figure 19. The size structure of mud crabs observed at each site during the Gladstone FishHealth Monitoring Program, Phase 2, April 2012 – July 2012. Note, (n) refers to the totalnumber of crabs examined at each site. 40Figure 20. The size structure of mud crabs observed at sites monitored during a fisheryindependent sampling program conducted along the Queensland coastline 2000 - 2009.Note, (n) refers to the total number of crabs examined at each site. 41Figure 21. Examples of shell abnormalities (circled) observed in mud crabs during theGladstone Fish Health Monitoring Program. 422
Page 1 and 2: Department of Agriculture, Fisherie
Page 3 and 4: ContentsTable of tables 1Table of f
Page 5: Mullet (Mugilidae) 80Banana prawn (
Page 9 and 10: Figure 38. Sharks caught in the Cal
Page 11 and 12: Phase 1 (August 2011-February 2012)
Page 13 and 14: The results in this study support t
Page 15 and 16: ecognised expertise and research pu
Page 17 and 18: Mr Mitchell reported high catches u
Page 19 and 20: 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
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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
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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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