DOI: 10.5061/dryad.kkwh70sgq
title: Data from: Northern bobwhite chick survival, growth, and movement in relation to broadcast supplemental feed and drought

description: The northern bobwhite is an economically important species across its
 geographic range that has experienced declining population numbers. There
 is ample research dedicated to evaluating management practices for the
 adult life stage. However, the effects of management on bobwhite chicks
 remain understudied, despite this being the most vulnerable age class. We
 evaluated the effects of broadcast supplemental feed on bobwhite chick
 survival, mass, and location both during a breeding season with normal
 precipitation and one with historically low precipitation. We followed
 broods via radio transmitters on hens until chicks were large enough to
 carry their transmitters at around 12 days of age, then followed chicks
 until independence. From 0-12 days old, broods had higher survival in
 control units than supplementally fed units, but there was no effect of
 supplemental feed on 12-35-day-old survival. Likely due to severe drought
 conditions in 2011, chicks weighed more in 2012 than in 2011. Feed
 treatment was not predictive of chick mass except for 4-day-old chicks in
 2012, for which chicks in supplemental feed units were heavier. This could
 suggest that, under normal weather conditions, supplemental feed helps
 hens produce heavier chicks, but that this advantage disappears with age.
 Additionally, we found that broods in fed units were closer to roads,
 along which feed was broadcast, than in control units, where roads had no
 added management impacts. Overall, supplemental feed had little or no
 clear influence on chick survival and body condition. Despite this,
 supplemental feed remains a useful management practice for adult
 bobwhites.
description: # Data from: Northern bobwhite chick survival, growth, and movement about
 broadcast supplemental feed and drought ## Description of the data and
 file structure Datasets and associated analysis code for a comparison of
 chick survival, growth, and locations in supplementally fed areas versus
 control unfed areas. ### Datasets and variables growthcombined.csv:
 Dataset for analyzing chick size across treatment, year, and age |
 **Column name** | **Description** | **Units** | **Data format** |
 **Missing data code** | | :-------------- |
 :--------------------------------- | :---------- | :-------------- |
 :-------------------- | | weight | Chick weight | grams | Number | - | |
 Year | Year of study | - | Factor | - | | Treatment | Feed (Exp) or unfed
 control (Ctl) | - | Factor | - | | age | Chick age in days post-hatch | -
 | Factor | - | | Attempt | Number of nest attempts of the hen | Brood
 count | Number | - | | ID | ID of the chick | - | Factor | - |
 post_multi.csv: Dataset for analyzing the survival of radio-tagged chicks
 ages 12-35. Chicks are the sampling units. | **Column name** |
 **Description** | **Units** | **Data format** | **Missing data code** | |
 :-------------- |
 :--------------------------------------------------------------------- |
 :-------- | :-------------- | :-------------------- | | ID | ID of the
 chick | - | Factor | - | | Treatment | Feed (Exp) or unfed control (Ctl) |
 - | Factor | - | | Weight | Chick weight at tagging | grams | Number | - |
 | Brood | ID of the brood | - | Factor | - | | ch | Individual capture
 history for the multi-state model | - | Factor | - | | Fate | Fate of the
 chick. Censor refers to dropped tags or radio malfunctions | - | Factor |
 - | prefledge_clean.csv: Dataset for analyzing survival of unmarked chicks
 ages 0-12 with the Nest Survival model. Brood is the sampling unit. |
 **Column name** | **Description** | **Units** | **Data format** |
 **Missing data code** | | :-------------- |
 :----------------------------------------------------------------------- |
 :---------- | :-------------- | :-------------------- | | Brood | ID of
 the brood | - | Factor | - | | Treatment | Feed (Exp) or unfed control
 (Ctl) | - | Factor | - | | ClutchSize | Number of chicks hatched per brood
 | Chick count | Number | - | | Attempt | Numberof  nest attempts of the
 hen | - | Number | - | | Year | Year of study | - | Factor | - | | Day1 |
 Earliest nest date for that year, first day ofthe  study period | Julian
 date | Number | - | | AgeDay1 | Age of the nest on Day 1 (negative for all
 nests found later thanDay 11) | Day count | Number | - | | FirstFoundDate
 | The date the nest was found | Julian date | Number | - | |
 LastPresentDate | Date the nest was last observed active | Julian date |
 Number | - | | FateDate | Date the nest was found hatched or failed |
 Julian date | Number | - | | Fate | Hatched = 0, Failed = 1 | - | Factor |
 - | | FirstFound | Day of the study period when the nest was found | Day
 count | Number | - | | LastPresent | Day of the study period when the nest
 was last observed active | Day count | Number | - | | LastChecked | Day of
 the study period when the nest was found hatched or failed | Day count |
 Number | - | quaillocations.csv: Dataset with brood locations for
 analyzing proximity to feedlines | **Column name** | **Description** |
 **Units** | **Data format** | **Missing data code** | | :-------------- |
 :----------------------------------- | :-------------------- |
 :-------------- | :-------------------- | | Date | Date of observation |
 date | Number | - | | Brood | ID of the brood | - | Factor | - | |
 Treatment | Feed (Exp) or unfed control (Ctl) | - | Factor | - | | AgeDays
 | Age of the brood at observation | Day count | Number | - | | Easting | X
 coordinate | NAD 1983 UTM Zone 14N | Number | - | | Northing | Y
 coordinate | NAD 1983 UTM Zone 14N | Number | - | | Year | Year of study |
 - | Factor | - | | Unit | Treatment unit ID | - | Factor | - | |
 NEAR\_DIST | Distance of brood to nearest feeding | meters | Number | - |
 ### Code/software All analyses were completed in R version 4.5.0. Required
 packages are indicated in the script below. ChickGrowthSurvival.R: Code
 used for analyses of chick weight, survival, and proximity to feedlines