Linear regression results of acoustic survey counts of fish for each target strength-upper limit of size class by year, with lower threshold of -52.6 dB.

<p>Assignment to size class based on [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0124799#pone.0124799.ref023" target="_blank">23</a>]. Slope is an estimate of loss (mortality) rate.day^-1.</p><p>Linear regression results of acoustic survey counts of fish for each target strength-upper limit of size class by year, with lower threshold of -52.6 dB.