Gladstone Fish Health Investigation 2011 - 2012 - Western Basin ...
Gladstone Fish Health Investigation 2011 - 2012 - Western Basin ... Gladstone Fish Health Investigation 2011 - 2012 - Western Basin ...
Table 3.8. Correlation matrix for the laboratory‐measured variables. Correlations are significant (P
32Bundy2Bundy1UpBoyne1UpBoyne2LwBoyne1Dimension 2 (22% variation)10-1Awoonga1Calliope1Fitzroy1Rodds1LwBoyne2Fitzroy2Calliope2-2Spoil1Rodds2Hamilton2Hamilton1-6 -5 -4 -3 -2 -1 0 1 2 3 4Dimension 1 (29% variation)Figure 3.5. Movements of the overall location and trip principal component means in multidimensionalspace. The reference sites are indicated by the squares with the dotted lines.Given that the four reference‐site points represent ‘normality’, it is pleasing to see that these scatteraround the mid‐top area of this figure, and that most of the Gladstone sites are in this proximity. Onecorner‐point here is the upper Boyne River at trip 2, which did have the highest HAI score, and the highestrates of abnormalities in the abdomen and liver‐form.Lake Awoonga does appear somewhat removed, and this is due to the ‘very good’ condition of thebarramundi (the only species sampled there) – these were all ‘undiseased’ and had low HAI scores.Similarly, the Spoil Grounds had generally healthy fish. Hamilton Point is also somewhat remote, but recallthat this sample consisted of 31 barramundi and one bull shark (hence see the separate ‘barramundi’analyses and discussion for this site).The ‘Harbour’ location is not plotted on this graph, as no samples were submitted to the laboratory fromthis site. Hence its status can only be judged by considering the percentages of diseased fish, and skin andlesion condition greater than zero. On the basis of these three variables, on trip 1 the Harbour sampleswere very similar to those from Rodds Bay. For trip 2, the Harbour samples were very similar to thesamplesfrom trip 1 at Bundaberg. Neither result appears a reason for concern.114
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Table 3.8. Correlation matrix for the laboratory‐measured variables. Correlations are significant (P