1 A method was developed to rapidly assess the effectiveness of trap designs and identify the causes of differences in effectiveness. 2 Fish entry and escape probabilities are correlated across trap designs. The probabilities are very high for '0' and 'S' trap designs and are much lower for the 'Z'...

Orange roughy is one of Australia's most valuable finfish However, its aggregating behaviour during spawning, slow growth, and longevity render it vulnerable to over-exploitation. Some stocks in New Zealand are at extremely low levels after only ten years of exploitation. Good management is vital...