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MECHANICAL FISH CONTROL <br />METHODS USED TO CONTROL FISH <br />.........................................................1. <br />WATER LEVEL ................................1111......................E <br />......... <br />MANIPULATION :.................... .............. ............... <br />................. ................................. <br />................. <br />TRAPS ........................ <br />•.1.......... i...1.....•N.111.1....11.......1.......... <br />..... N.11......i .111.. 1111....11. <br />BARRIERS <br />COMMERCIAL <br />ELECTRICITY <br />SEINES <br />WEIRS <br />GILLNETS <br />CAST NETS <br />TRAWLS <br />•. .1......1• •..... .1111....1.1.....1. ....... ... <br />......11......1..1..1.....1..1...1.111......1..... <br />................................................. <br />......... ......................................... <br />................................................. <br />.................................................. <br />FISHING :: <br />::H::::00 :::::: <br />. .1..1 . ................. ......... <br />•....•.Ii.1..,1.....111......M...... <br />..................................... <br />.................................. N • <br />.............................. .. <br />01 <br />........................ <br />........................ <br />........................ <br />........................ <br />.............. <br />............... <br />.............. <br />............... <br />........... <br />............ <br />........... <br />0 10 20 <br />PERCENTAGE <br />12