preferred habitats) over a 10 year period. Level C - This species has been recorded in the major drainages that drain into the site. There are no P1, C1, C2 data describing the population Based on four annual status of this species in the site. surveys in a 10 year Abundance data are available for For Australian grayling, an unacceptable change will have period at multiple sites drainages that discharge into the occurred should all of the drainages that drain into Corner Inlet no located in all major Short Term site (Ecowise 2007; et al. O’Connor longer support this species. catchments. 2009). et al. (2009) notes O’Connor that collection of this species is difficult and requires targeted survey techniques. Few targeted empirical surveys have been undertaken in the site’s drainages to date. S2 Fish abundance Medium term An unacceptable change will have occurred if the long term Annual fish catch Level A Commercial fish catch S2 – (using fish catch (greater than five years) median catch falls below the 20th measured over a greater data. Note that there are presently of key species as percentile historical baseline values in standardised abundance or than five year period. no fisheries-independent baseline a surrogate) catch-per unit effort of five or more commercially significant data (collected using empirical, species (relative to baseline) due to altered habitat conditions systematic methods) describing within the site. The 25th percentile pre-listing baseline commercial patterns in the distribution and catch per unit effort values for the site are as follows (units are abundance of key species. tonnes per annum per number of boats see Table 3-8): Therefore, the limits of acceptable – change should be treated with caution, noting socio-economic factors should be taken into account when assessing catch data underpinning this LAC.
Short Term For Australian grayling, an unacceptable change will have occurred should all of the drainages that drain into Corner Inlet no longer support this species. preferred habitats) over a 10 year period. Based on four annual surveys in a 10 year period at multiple sites located in all major catchments. Level C - This species has been recorded in the major drainages that drain into the site. There are no data describing the population status of this species in the site. Abundance data are available for drainages that discharge into the site (Ecowise 2007; O’Connor et al. 2009). O’Connor et al. (2009) notes that collection of this species is difficult and requires targeted survey techniques. Few targeted empirical surveys have been undertaken in the site’s drainages to date. P1, C1, C2 S2 Fish abundance (using fish catch of key species as a surrogate) Medium term An unacceptable change will have occurred if the long term (greater than five years) median catch falls below the 20th percentile historical baseline values in standardised abundance or catch-per unit effort of five or more commercially significant species (relative to baseline) due to altered habitat conditions within the site. The 25th percentile pre-listing baseline commercial catch per unit effort values for the site are as follows (units are tonnes per annum per number of boats – see Table 3-8): Annual fish catch measured over a greater than five year period. Level A – Commercial fish catch data. Note that there are presently no fisheries-independent baseline data (collected using empirical, systematic methods) describing patterns in the distribution and abundance of key species. Therefore, the limits of acceptable change should be treated with caution, noting socio-economic factors should be taken into account when assessing catch data underpinning this LAC. S2