Mark–recapture length data for estimating growth of non-diadromous Galaxiidae

This dataset contains individual length data of tagged non-diadromous Galaxiidae populations through time across a flood disturbance gradient in rivers of the Waimakariri and Rakaia catchments, New Zealand. Twelve sites were sampled on four occasions after the 2021 Canterbury flood event (December, January, March, April 2021-2022), which all contained non-diadromous galaxiids and were distributed into one of three trout abundance treatments; absent (n=4), rare (n=4), common (n=4). Site level data includes measures of flood magnitude, ordinal Salmonidae abundance and continuous Galaxiidae density.
This dataset was used to test the effect of trout abundance on individual galaxiid growth rates recovering following a major flood event. Detailed methodology and results of this study are reported in: Lennox et al. (2026) Introduced trout hinder the recovery of native fish following an extreme flood disturbance. Journal of Fish Biology.