Galaxiid Fish Growth Data After a 2021 Flood in New Zealand Rivers

Individual length data for tagged non-diadromous Galaxiidae fish populations tracked across twelve sites in New Zealand's Waimakariri and Rakaia catchments. The dataset was collected on four occasions between December 2021 and April 2022 following a major flood event. Rory Lennox created this data to test the effect of introduced trout abundance on native fish recovery, with results published in a 2026 Journal of Fish Biology study.

Use Cases

• Modeling individual fish growth rates based on repeated length measurements over time.
• Analyzing the impact of trout abundance treatments on native fish recovery post-flood.
• Studying population density changes in Galaxiidae across a flood disturbance gradient.
• Correlating site-level flood magnitude metrics with fish growth and density data.

Strengths

• Data is structured around a controlled experimental design with three distinct trout abundance treatments across twelve sites.
• Includes temporal data from four sampling occasions over a five-month period following a specific flood event.
• Site-level metadata includes measures of flood magnitude, trout abundance, and Galaxiidae density.

Limitations

• The dataset is small at 42.4 KB, indicating a limited scope and sample size.
• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment for some statistical analyses.

Provenance

Source

Rory Lennox via figshare.

Collection Method

Field sampling using mark-recapture techniques at twelve river sites.

Time Range

December 2021 to April 2022.

Freshness

Last updated 2026-04-11 01:37:43

Geography

Rivers in the Waimakariri and Rakaia catchments, New Zealand.