Figure 2.

Estimation of goose barnacle age. Blue squares: estimated age plotted against capitulum length for L. australis in southeastern New Zealand waters, compiled using published data [31]. ‘Estimated age’ refers to the length of time floating beacons had spent adrift before collection and measurement of barnacles. Red crosses: capitulum lengths (l) of the largest L. australis from each of the six bull kelp wrack samples plotted against ages derived from the regression equation. The estimated age (in days) for each wrack specimen is: 67.7, 40.7, 39.2, 37.2, 27.1, 22.4. Wrack specimen identification numbers are shown. Upper-left image overlay, L. australis from bull kelp wrack (length approximately scaled to the y-axis).