Atlantic cod individual spatial behaviour and stable isotope associations in a no-take marine reserve

Foraging is a behavioural process and, therefore, individual behaviour and diet are theorized to covary. However, few comparisons of individual behaviour type and diet exist in the wild.
We tested whether behaviour type and diet covary in a protected population of Atlantic cod, Gadus morhua. 
Working in a no-take marine reserve, we could collect data on natural behavioural variation and diet choice with minimal anthropogenic disturbance. We inferred behaviour using acoustic telemetry and diet from stable isotope compositions (expressed as δ13C and δ15N values). We further investigated whether behaviour and diet could have survival costs.
We found cod with shorter diel vertical migration distances fed at higher trophic levels. Cod δ13C and δ15N values scaled positively with body size. Neither behaviour nor diet predicted survival, indicating phenotypic diversity is maintained without survival costs for cod in a protected ecosystem.
The links between diet and diel vertical migration high..., , , # Atlantic cod individual spatial behaviour and stable isotope associations in a no-take marine reserve

[https://doi.org/10.5061/dryad.pk0p2ngv6](https://doi.org/10.5061/dryad.pk0p2ngv6)

This dataset contains all data used in the analysis for the associated manuscript, as well as an R script which can be used to replicate the analysis. There are six files, including multispecies stable isotope data, cod sampling data, cod specific stable isotope data, cod meta data, cod positions and an R script for analysis.

## Description of the data and file structure

file: cod\_stable\_isotopes.rdata
description: Cod specific stable isotopes data in the .rdata format
columns:

```
TRIP - sampling event
Lcm - Fork length (in cm) of the cod measured during sampling
d13C - δ13C values in ‰
d15N - δ15N values in ‰
X.C - %C
X.N - %N
C.N.Ratio - C:N ratio
serial - transmitter ID of the cod (connected to positioning dataset)
samplingDate - date of sampling
x - UTM x (m) location of cod capture
y - UTM ...