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

Table 3.9c. Regional group means and significance‐difference testing.Trip 1 –Liver form %abnormalL iver %discolouredParasites% > zeroMesentaryfat (%)Fitzroy R / Bundabergb10.0a26.27.9 42.5 aHamilton Pt / Calliope R 7.2 b 5.4 b 11.8 10.2 cUpper & Lower Boyne R 29.4 a 24.2 a 3.7 28.7 bRodds Bayab11.4 37.1 a 20.0 14.1 bcGladstone area (overall) 16.9 19.3 10.2 18.4Trip 2 –Fitzroy R / Bundabergb20.226.4 a b11.118.0 bHamilton Pt / Calliope Rc0.05.0 bc a39.50.8 cUpper & Lower Boyne R 43.6 a b21.2 b18.119.8 bRodds Bay 0.0 c 0.0 c 25.3 ab 38.7 aGladstone area (overall) 17.4 10.5 28.1 16.0a,b,c Within columns and trips, means for the individual regions that do not have a common superscriptletter are significantly different (P < 0.05).#For the overall ‘Gladstone area’ means, those which are bolded are significantly different from the meanfor the pooled reference sites (Fitzroy R / Bundaberg).4. SEPARATE ANALYSES FOR BARRAMUNDI DATA4.1 Variables not analysedFor barramundi, there were too few ‘non‐normal’ ratings for the analyses of eye condition, generalcondition, heart condition, hindgut rating, kidney condition and spleen rating.4.2 Overview of analysesOf the thirteen continuous variables that had sufficient data for analyses, fish length was significant (P zero 20.0 14.9 3.7Mesentary fat (%) * 33.1 50.2 5.1# as assessed in the field; ** P < 0.01; * P < 0.054.3 Location by trip meansThe categorical measures have again been analysed and listed here as the binary contrast (per cent notnormal).Significant differences (P < 0.05) were found between locations in ten analyses, between trips infive, with a significant location by trip interaction in seven (54%). Hence, for most variables there areproven changing patterns over space and time, so again the data are reported on this two‐way basis, inTables 4.2a to 4.2c.116