Data from: Selective use of conspecific and heterospecific social information during food restriction in captive finches
Data files
Sep 28, 2026 version files 19.38 KB
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Dryad_Database.csv
17.97 KB
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README.md
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Abstract
Animals can benefit from social information from both conspecifics and heterospecifics – but the use of information from these different sources may depend on context. To prepare for declining food conditions, some birds use warnings from food-restricted conspecifics to adjust their behavior and physiology. Here, we assess the extent to which this phenomenon occurs more broadly between conspecifics and heterospecifics with different degrees of ecological similarity. Red crossbills (Loxia curvirostra) are conifer seed specialists that exist as a suite of different ecotypes that overlap in diet but differ in foraging efficiency and preference for different conifers. Pine siskins (Spinus pinus) also eat conifer seeds, but are seed generalists that feed widely on other plants. To evaluate the extent of conspecific and heterospecific social information use in this context, focal red crossbills were housed adjacent to a neighboring bird that was food-restricted for 3 days before they were given an identical food restriction. Neighbors were a crossbill of either the same ecotype, a different ecotype with high diet overlap, a different ecotype with low diet overlap, or they were a pine siskin. Red crossbills given social information from a food-restricted neighbor of the same ecotype had better conserved body mass compared to those that were paired with different ecotypes or a pine siskin neighbor. This demonstrates high selectivity in social information use and suggests the costs of responding inappropriately are high.
https://doi.org/10.5061/dryad.qbzkh18t9
Description of the data and file structure
Files and variables
File: Dryad_Database.csv
Description: Variables that were not measured for particular individuals are indicated as NA.
Variables
- Band: Alpha-numberical bird identification number
- Sex: Sex of individual; value are M (male), F (female)
- Treatment: T2 No Warning (T2 red crossbills with well fed neighbors); PreT2 (T2 red crossbills with food restricted T2 neighbors); PreT3 (T2 red crossbills with food restricted T3 neighbors); PreT5 (T2 red crossbill with food restricted T5 neighbors); PreSiskin (T2 red crossbills with food restricted pine siskin neighbors)
- Season: Summer (data collected in July) and Winter (data collected in March)
- Year: Year of study
- Restriction Day: -3 (data collected three days prior to restriction); 0 (data collected on the day of start of food restriction); 3 (data collected 3 days after start of food restriction)
- Mass: Body mass in grams
- Fat: Summed furcular and abdominal fat score
- Bairlein Muscle: Size of muscle based on Bairlein scale. Scores range from 0 (25% muscle tone) to 3 (100% muscle tone)
- Food Intake: Grams of food consumed in 24 hours
