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Mean biomass deviation for large banded kōkopu (a), large giant kōkopu (b), large shortjaw kōkopu (c), large kōkopu overall (d), and small kōkopu overall (e) across 50‐m reaches within closed (red) and open (blue) stream sites sampled bimonthly for 2 years. Each point represents an independent 50‐m reach and has been offset on x‐axis to minimize overlap with model fits and associated 95% CIs. Gray‐shaded areas represent fishing seasons (1 September to 30 October). “Biomass deviation” refers to the quantifiable difference between the actual biomass observed and standardized biomass predictions obtained from habitat‐biomass models developed using fished reaches sampled in May 2021, identified in figure by gold‐shaded area (see Methods for full explanation; Crichton et al., 2023). By accounting for life stage‐specific habitat associations, biomass deviance can be used to examine the relative biomass differences across months and fishing pressure (open vs. closed). All illustrations were created by Ben R. J. Crichton.
Source publication
Compensatory density‐dependent (DD) processes play an integral role in fisheries management by underpinning fundamental population demographics. However, DD processes are often assessed only for specific life stages, likely resulting in misleading evaluations of population limitations. Here, we assessed the relative roles of intra‐ and inter‐life s...
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