Data from: Density-dependent diel activity in stream-dwelling Arctic charr Salvelinus alpinus ...

Intraspecific competition plays a significant role in shaping how animals use and share habitats in space and time. However, the way individuals may modify their diel activity in response to increased competition has received limited attention. We used juvenile (age 1+) Arctic charr Salvelinus alpin...

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Bibliographic Details
Main Authors: Fingerle, Amy, Larranaga, Nicolas, Steingrímsson, Stefán Óli
Format: Dataset
Language:English
Published: Dryad 2017
Subjects:
Online Access:https://dx.doi.org/10.5061/dryad.bn46h
https://datadryad.org/stash/dataset/doi:10.5061/dryad.bn46h
Description
Summary:Intraspecific competition plays a significant role in shaping how animals use and share habitats in space and time. However, the way individuals may modify their diel activity in response to increased competition has received limited attention. We used juvenile (age 1+) Arctic charr Salvelinus alpinus to test the prediction that individuals at high population density are more active and distribute their foraging activity over a greater portion of the 24-h cycle than individuals at low population density. Individually tagged fish were stocked in seminatural stream enclosures at low (2 fish/m2) and high (6 fish/m2) density. During each of two 2-week experimental rounds, activity of all fish within each enclosure was recorded every 3 h over seven 24-h cycles. At high density, fish were more active and distributed their activity over a greater portion of the 24-h cycle, with increased activity particularly at crepuscular times. Fluctuations in ecological conditions (e.g., water temperature and light intensity) ... : Invertebrate driftData collected in the field in 2013. Please see ReadMe file for a description of column headings.Drift_data.csvActivity of individual fishData collected in the field in 2013. Please see ReadMe file for a description of column headings.Fish_data.csvEnclosure scansData collected in the field in 2013. Please see ReadMe file for a description of column headings.Scan_data.csvSubstrate estimationsData collected in the field in 2013. Please see ReadMe file for a description of column headings.Substrate_data.csvWater current velocity measurementsData collected in the field in 2013. Please see ReadMe file for a description of column headings.Water_current_data.csvWater depth measurementsData collected in the field in 2013. Please see ReadMe file for a description of column headings.Water_depth_data.csv ...