Located on the Waipa Stream, the Waipa spawning trap is positioned within a significant spawning tributary of the Tongariro River, 24 km upstream from Lake Taupo.

Fishery Rangers record the numbers of trout, their sex, length, weight and iteroparity (how many times individual fish have spawned). From this data we also determine a Condition Factor, which reflects how much food has been available to the trout.

This trap has been operational since 1998 and has provided a valuable long-term data set. We view this information in combination with a variety of other studies such as angler surveys, drift dives and lake productivity work, to ensure a broad understanding of fishery's health.

Below are links to monthly reports from the Waipa trap. These are presented as graphs and tables for each month, with the previous month and same month of last year included. 

Each file includes the below data for brown and rainbow trout (male and female):

• count
• average length
• maximum length
• average weight
• maxium weight
• condition factor.