"We urge people to contact their local DOC or Regional Council office if they see overhanging culverts or other barriers that stop whitebait migrating," Ms Goodman said.
Whitebaiting is permitted between 5am and 8pm or between 6 am and 9pm when daylight saving starts on September 28.
DOC will be patrolling whitebaiting sites and talking to whitebaiters throughout the season to ensure people are complying with the regulations.
DOC administers regulations that cover fishing methods, location, legal fishing times and net size. Illegal whitebaiting carries a maximum fine of $5000 and whitebaiting equipment can be seized.
Pamphlets with the regulations are at DOC offices and sporting shops and DOC's website:
http://www.doc.govt.nz/parks-and-recreation/things-to-do/fishing/whitebaiting/whitebait-regulations-all-nz-except-west-coast/