Our site is currently being updated and pages are changing regularly. We thank you for your patience during this transition and hope that you find our new site easy to use.


The search facility for this site can be found in the top right-hand corner of all web pages. To perform a search, enter one or more words in the search box and select 'search' (or press the 'enter' key on your keyboard).

  • Documents containing all your words will be displayed first, followed by documents that contain some of your words.
  • Searches are not case-sensitive so there is no need to use capital letters.
  • Using words such as a, an, the or of, will not improve the results of your search.
  • You can use quotation characters around your words to match an exact phrase e.g. "exotic pest fish".

Each result will include:

  • the document title shown as a link that can be selected
  • a short summary of the document
  • the web address of the information displayed as a link that can be selected
  • the document's size in kilobytes.

Advanced search

Our advanced search provides additional options for making your search more precise.

These options include:

  • phrase search
  • word exclusion
  • file type
  • sorting
  • publication date.