When data can be traced back to a single trip or a single harvester (even when it is implicit), data should be pooled for presentation purposes. See “How should I present confidential data” section for suggestions on pooling/combining data to meet confidentiality requirements.
In some cases, annual summary by state and species may still be confidential because only one or two dealers process the catch. Alternatively, if there is only one known harvester in a state, the harvester’s identity is implicit and those data are confidential.
Someone is presenting on the total landings of deepwater catshark for 2005. The presenter would need to be aware that if less than three dealers purchased catshark for that year then it is a violation of the fisheries rule of three to show any totals of landings. Or, if less than three fishermen catch and land catshark then it is a violation of the fisheries rule of three to show any totals of landings.