READ ME File For 'DATASET’ for The response of a brown trout (Salmon trutta) population to reintroduced Eurasian beaver (Castor fiber) habitat modification

Dataset DOI:https://doi.org/10.5258/SOTON/D1814 

ReadMe Author: Robert J. Needham, Martin Gaywood, Angus Tree, Nick Sotherton, Dylan Roberts, Colin W. Bean, Paul S. Kemp.

This dataset supports the publication:
Robert J. Needham, Martin Gaywood, Angus Tree, Nick Sotherton, Dylan Roberts, Colin W. Bean, Paul S. Kemp. (2021). The response of a brown trout (Salmon trutta) population to reintroduced Eurasian beaver (Castor fiber) habitat modification. Canadian Journal Fisheries and Aquatic Sciences.

Corresponding Author: Robert Needham, International Centre for Ecohydraulic Research, University of Southampton, Southampton SO17 1BJ, UK
(Email: rjn1a13@soton.ac.uk)

Description:
The excel files contains all data used for generating Fig.2 to Fig.9. 
The figures are as follows:

Fig. 2 Mean +/- SD brown trout abundance (trout·m–1) during spring (black), summer (grey) and autumn (white) 2016 in the beaver modified and control streams with all size class of trout included (A) and (B) fry ≤ 30 mm and parr 31–60 mm omitted. (Master_Abundance_Density_14052020.xlsx)

Fig. 3  Mean +/- SD brown trout density (m–2) during spring (black), summer (grey) and autumn (white) 2016 in the modified and control streams with all size class of trout included (A) and fry ≤ 30 mm and parr 31–60 mm omitted (B). (Master_Abundance_Density_14052020.xlsx)

Fig. 4  The distribution of length class frequency between the beaver modified and control streams in spring (2015 and 2016), summer (2016) and autumn (2014, 2015 and 2016). Seasonal data has been pooled for the years. (Master_LCF_Data_20052020.xlsx)

Fig. 5  Fork length of trout captured in the modified “Mod” (clear boxes) and control “Con” (grey boxes) streams during autumn, spring and summer 2014, 2015 and 2016. The box plots illustrate the median (horizontal line), interquartile range (boxes) and overall range up to 1.5 times the interquartile range (whiskers). All outliers are depicted (clear circles). (Master_FL_Mass_14052020.xlsx)

Fig. 6 Differences in mass (g) of (A) post-YOY trout (FL 61–121 mm) and (B) YOY parr (FL 31–60 mm) between the modified and control streams. The box plots illustrate the median (horizontal line), interquartile range (boxes) and overall range up to 1.5 times the interquartile range (whiskers). All outliers are depicted (clear circles). (Master_Adult_Parr_Mass.xls)

Fig. 7 The linear relationship between growth in mass (g) and FL (mm) of trout captured in the modified stream. Grey shading indicates 95% confidence intervals. (Master_FL_Mass_14052020.xlsx)

Fig. 8 Relationship between observed seasonal growth rates of brown trout inhabiting a beaver modified stream and that predicted by an optimal growth model that assumes fish are fed to satiation under laboratory conditions (Elliott et al. 1995): times symbols — winter 2014–2015 (October December 2014 – March– April 2015 [n = 16]), circles — spring–summer 2015 (March–April 2015 – October 2015 [n = 16]), triangles — winter 2015–2016 (October 2015 – April–May 2016 [n = 12], plus symbols — spring 2016 (April–May 2016 – July 2016 [n = 58]), diamonds — summer 2016 (July–October 2016 [n = 17]). (Master_Trout_Growth.xls)

Fig. 9 Nonmetric multidimensional scaling (NMDS) ordination plot of invertebrate community composition between a beaver modified stream (black diamonds with polygon) and control stream (grey circles with polygon) in northern Scotland. (Master_Invertebrate_Data.xls)

Geographic location of data collection: Beauly, Inverness, Scotland, U.K.

Date of data collection 2014-09-01 to 2016-12-30

Associated Grants: The PhD was funded by the NERC Doctoral Training Partnership (SPITFIRE) based at the University of Southampton. Additional funding was provided by the Game and Wildlife Conservation Trust, Trout and Salmon Association and NatureScot.


Dataset available under a CC BY 4.0 licence


Publisher: University of Southampton, U.K.


Date: September 2021