Data and code for "Downsized: Gray whales using an alternative foraging ground have smaller morphology"

<strong>Overview</strong> This project compares length-at-age growth, as well as skull and fluke size, between ENP and PCFG gray whales. <br> <strong>Code</strong> 1. <strong>growth_model_v4.R</strong> – to run growth model 2. <strong>model_outputs_v4.Rmd </strong>– uses outputs from growth_model_v4.R to create summary data frames and figures in manuscript. <br> <strong>Data description</strong> <br> <strong>enp_Agbayani_etal_2020.csv</strong> = dataset compiled and used by Agbayani et al., 2020 to analyze ENP length-at-age growth from data comprised of standings, whaling, and aerial photogrammetry between 1926 and 1997. Contact Selina Agbayani for further details: [e-mail]. Agbayani S, Fortune SME, Trites AW. 2020. Growth and development of North Pacific gray whales (<em>Eschrichtius robustus</em>). J Mammal 101, 742–754. (doi:10.1093/jmammal/gyaa028). https://doi.org/10.1093/jmammal/gyaa028 <br> <strong>enp_length&amp;age.csv</strong> = scientific whaling data on ENP gray whales collected by Rice and Wolman (1971). Contains total length (TL), sex, and age data for individuals. <br> <strong>enp_morphological_data.csv</strong> = scientific whaling data on ENP gray whales collected by Rice and Wolman (1971). Contains total length (TL), snout-blowhole (SnB), and fluke span (FS) measurements, as well as metadata such as sex, age, demographic info, and date of specimen collection. <br> <strong>pcfg_data_growth_model.csv</strong> = morphometric and age data for PCFG gray whales collected via drone-based photogrammetry and photo-ID history. Contains total length (TL), snout-blowhole (SnB), and fluke span (FS) measurements, as well as metadata such as sex and age, <br> Most columns are self explanatory. Below are descriptions of columns that are less obvious that may be in each or some of the .csv files. <br> whale_ID: ID of whale AID: whale_ID + date (YYYYMMDD) population: ENP or PCFG Age: age of whale in years AgeType: 0 = “known age”, 1 = ‘min age’ for PCFG. For ENP, earplugs are considered known age. TL.mean: mean of posterior distribution for TL for that individual TL.lower: lower bound of 95% highest posterior density interval (HPDI) TL.upper: upper bound of 95% HPDI TL.cv: coefficient of variation (%) of posterior distribution for TL for that individual TL.var: variance of posterior distribution for TL for that individual TL.sd: standard deviation of posterior distribution for TL for that individual SnB.std: snout-blowhole measurement standardized by TL. Same suffixes apply (i.e, SnB.std.mean = the mean of the posterior distribution for SnB for that individual) Fs.std: fluke span measurement standardized by TL. Same suffixes apply (i.e, Fs.std.mean = the mean of the posterior distribution for Fs for that individual) suffix “.HPDwidth”: the width of the HPDI (.upper - .lower)