DOI: 10.5061/dryad.fqz612k47
title: Data from: Ecological drivers and fitness consequences of incubation period in Ficedula albicollis (Collared Flycatcher): Insights from a long-term data set

description: Using a 37-year dataset of collared flycatchers (Ficedula albicollis), we
 examined how incubation duration is influenced by environmental conditions
 and female characteristics. In our study, we clearly demonstrated that the
 length of the incubation period exhibits variability and may be subject to
 selection. Our findings indicate that the duration of the incubation
 period tended to affect hatching success but played a more substantial
 role in recruitment, which is a key indicator of fitness. We found that
 incubation duration is significantly affected by laying date, clutch size,
 female body condition, and ambient temperature, including its variability.
 Interestingly, both low and high ambient temperatures are linked to
 shorter incubation periods. In turn, an increase in temperature
 variability is associated with shortening incubation periods. Further
 research is needed to explore the long-term impacts of these incubation
 strategies on population viability, particularly in the face of increasing
 climate variability.
description: # Data from: Ecological drivers and fitness consequences of incubation
 period in Ficedula albicollis (Collared Flycatcher): Insights from a
 long-term data set Dataset DOI:
 [10.5061/dryad.fqz612k47](10.5061/dryad.fqz612k47) ## Description of the
 data and file structure This dataset originates from a long-term study
 (1981–2017) of collared flycatchers (*Ficedula albicollis*) breeding in
 nest boxes on Gotland, Sweden. Nesting parameters such as laying date,
 clutch size, incubation duration, hatching success, and recruitment were
 recorded alongside adult female traits (age, body mass, wing length) and
 ambient temperature data. We examined how incubation duration is
 influenced by environmental conditions and female characteristics. ###
 Files and variables #### File: ORNITH-24-182.xlsx **Description:** This
 excel file contains data used in the article *"Ecological drivers and
 fitness consequences of incubation period in Ficedula albicollis (Collared
 Flycatcher): Insights from a long-term data set."*  ##### Variables
 YEAR     Year of observation AREA    Study area BOX       Nest box ID
 LD          Laying  date (first egg laid) CS          Clutch size (number
 of eggs laid) INC LENGHT       Incubation length (in days) HS        
 Number of hatchlings (hatched chicks) HD         Hatch date (date coded
 when eggs hatched) FLEDGE Number of fledglings (chicks that left the nest)
 RECRUIT             Number of recruits (fledglings that returned to breed)
 FRING   Female ring ID (coded) AGEF     Age of the female (e.g., young =
 yearling, old = adult) WGTF   Female body mass (in grams) WINGF Female
 wing length (in mm) FCOND Female body condition index TEM.VAR           
 Temperature variation during incubation period (°C) TEMP.MEAN      Mean
 temperature during incubation period (°C) NA   not available ##
 Code/software The dataset is provided in CSV format (.csv). ## Access
 information Other publicly accessible locations of the data: * N/A Data
 was derived from the following sources: * N/A