#GENERAL STATEMENT, PLEASE READ THIS BEFORE USING THE DATA The attached archived file contains data derived from the long term field project monitoring individual red deer on the Isle of Rum. This is a request to please let us know if you use them. Several people have spent the best part of their careers collecting the data. If you plan to analyse the data, there are a number of reasons why it would be very helpful if you could contact j.pemberton@ed.ac.uk before doing so: 1) Occasionally we discover and correct errors in the data. 2) The data are complex and workers who do not know the study systems may benefit from advice when interpreting it. 3) At any one time quite a few people within the existing project collaborations are analysing data from these projects. Someone else may already be conducting the analysis you have in mind and it is desirable to prevent duplication of effort. 4) In order to maintain funding for the projects, every few years we have to write proposals for original analyses to funding agencies. It is therefore very helpful for those running the project to know what data analyses are in progress. If you are interested in analysing the detailed project data in any depth you may find it helpful to have our full relational databases rather than the files available here. If so, then we have a simple process for bringing you onto the projects as a collaborator. Individual identities and years have been recoded and should therefore not be linked with data archived from other papers using the Rum red deer data. Data from: Consistent within-individual plasticity is sufficient to explain temperature responses in red deer reproductive traits H Froy, Martin J, Stopher KV, Morris A, Morris S, Clutton-Brock TH, Pemberton JM & Kruuk LEB Journal of Evolutionary Biology 2019 Data are uploaded separately for the analyses of calving date and calf birth weight. IDs and years have been recoded. "CalvingDate" FemaleID Maternal identity (recoded) Year Year the calf was born (recoded) Age Maternal age (years) ReproStatus Maternal reproductive status (Naive: first time breeder; MilkHind: gave birth last year and calf survived to 1 May; TrueYeld: has bred before but no calf last year; SummerYeld: gave birth last year but calf died before 1 October; WinterYeld: gave birth last year but calf died between 1 October and 1 May) CalvingDate Date calf was born in days from 1 May MaxTempIndex Average maximum temperature during the best window for calving date (17 July - 20 November in the previous year) "CalfBirthWeight" FemaleID Maternal identity (recoded) Year Year the calf was born (recoded) Age Maternal age (years) ReproStatus Maternal reproductive status (Naive: first time breeder; MilkHind: gave birth last year and calf survived to 1 May; TrueYeld: has bred before but no calf last year; SummerYeld: gave birth last year but calf died before 1 October; WinterYeld: gave birth last year but calf died between 1 October and 1 May) CalfSex 1 = female; 2 = male CalvingDate Date calf was born in days from 1 May CalfBirthWeight Mass of calf at capture in kg adjusted for time since birth (birth weight = capture weight – (0.01539 * age at capture in hours), following Clutton-Brock et al., 1982) MaxTempIndex Average maximum temperature during the best window for calf birth weight (5 February - 23 April in the year of birth)