No. 12. GILPAT.pdf - Marine Institute Open Access Repository

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NDP <strong>Marine</strong> Research Sub-Programme 2007-2013Input Number of Salmon per SiteThere were 4,064,086 salmon put to sea in sites with an input number >300,000 and 1,244,848salmon put to sea in sites with an input number 300,000 and six sites had an input 300,000 was 13.3% (SD±11.7) and300,000 and 300,000 was18.6% (SD±9.1) and 300,000 and
NDP <strong>Marine</strong> Research Sub-Programme 2007-201316.6% (SD±8.5) and the negative sites was 53.5% (SD±0.7). There was a significant difference ingill disorder mortalities between the sites positive for PD and those that were negative(P=0.000006). Mortality to gill disorder was substantially higher in the salmon sites which werenegative for PD.Table 2.8: Percentage mortality of Atlantic salmon to gill disorder for sites positive or negative forpancreas disease.Positive 0% 8% 28% 10% 10% 26% 22% 8% 21%Negative 53% 54% 0% 0% - - - - -Net Washing MethodThere were 1,923,018 salmon that were in sites that used the Idema net washing method and3,385,916 on sites where the traditional method of changing nets was used in the studypopulation. Six sites carried out net washing using the Idema and seven sites did not. The meanpercentage mortality to gill disorder of the Idema cleaned sites was 21.7% (SD±18.2) and thenon Idema pens was 15.3% (SD±19.0). There was no significant difference in gill disordermortalities between the Idema cleaned sites and where it was not used (P=0.55). Looking onlyat sites affected by gill disorder the mean percentage mortality of the Idema cleaned sites was26.0% (SD±16.5) and the non Idema pens was 21.4% (SD±19.5). There was no significantdifference in gill disorder mortalities between the Idema cleaned sites and where it was notused (P=0.70).Distance to Nearest FarmThere were 3,038,041 salmon that were on sites that were
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No. 12. GILPAT.pdf - Marine Institute Open Access Repository

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