{
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  "name": "Environmental determinants of interpopulation variation in chemical and visual signals in an insular lizard",
  "description": [
    "Understanding how communication systems evolve across heterogeneous environments requires examining multiple signalling modalities. In 2017 and 2018, we examined geographic variation in chemical signals of the insular lizard Gallotia galloti across 16 sites on Tenerife (Canary Islands). We analysed interpopulation variation in the lipophilic fraction of male femoral gland secretions in relation to vegetation cover (NDVI), local sex ratio, ectoparasite load, and macroclimatic factors. In 2023, we also analysed visual signals of two lizard phenotypes that occur in contrasting habitats of Tenerife. We modelled the chromatic and achromatic conspicuousness of colour patches under both a conspecific (lacertid) and an avian predator visual system to examine habitat-dependent divergence in signal detectability. Chemical signal diversity decreased with increasing shrub vegetation cover, while males from sites with male-biased sex ratios exhibited greater individual chemical richness, consistent ...",
    "Statistics Analysis of the Lipophilic Fraction of Male Chemical Signals\nSpatial autocorrelation (SAC)\nWe used Moran's matrix I, where the null hypothesis equals the spatial independence of the data (Legendre and Legendre, 1998). The following variables were spatially independent: MCCR (sd = 0.056, P = 0.46), LCCR (sd = 0.064, P = 0.66), MSDC (sd = 0.060, P = 0.76) and LSDC (sd = 0.060, P = 0.31). However, the PC1 chemicals (sd = 0.055, P = 0.049) and the PC2 chemicals were spatially autocorrelated (sd = 0.062, P = 0.009). To control SAC in the models analysing PC1chemicals and PC2chemicals, we included as predictors an inverse distance-weighted function of neighbouring response (autocovariate) (Dormann et al., 2007).\nModel building\nStatistical analyses were performed in R version 4.0.4 (R Core Team, 2021). The sampling year (2017 or 2018) and the colour phenotype (i.e., ‘galloti’ or ‘eisentrauti’) were established as factor predictors in a general linear model. We included local sex rat...",
    "# Environmental determinants of interpopulation variation in chemical and visual signals in an insular lizard\n\n---\n\n# Dataset overview\n\nThis repository contains datasets used to investigate geographic variation in chemical and visual communication signals in populations of *Gallotia galloti* from Tenerife (Canary Islands, Spain).\n\nIncluded datasets:\n\n1. **Chemicals_Gallotia_16sites.csv**\\\n   Population-level descriptors of male chemical signals and environmental variables across 16 sampling localities.\n2. **visual_distances.csv**\\\n   Visual conspicuousness estimates derived from spectral reflectance data and visual modelling under conspecific and avian predator visual systems.\n\n---\n\n# Dataset 1: Chemicals_Gallotia_16sites.csv\n\n## Description\n\nThis dataset contains chemical, environmental, and demographic variables used to investigate interpopulation variation in the lipophilic fraction of male femoral gland secretions.\n\nEach row corresponds to **one sampling locality**.\n\nChemical data w...",
    "",
    ""
  ],
  "url": "http://datadryad.org/dataset/doi%253A10.5061%252Fdryad.vmcvdnd54",
  "contentUrl": [
    "http://datadryad.org/downloads/file_stream/4781763",
    "http://datadryad.org/downloads/file_stream/4781764",
    "http://datadryad.org/downloads/file_stream/4781770"
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  "identifier": "https://doi.org/10.5061/dryad.vmcvdnd54",
  "version": 6,
  "isAccessibleForFree": true,
  "keywords": [
    "local adaptation",
    "Gallotia galloti",
    "Communications",
    "Sexual selection"
  ],
  "creator": [
    {
      "@type": "Person",
      "name": "Rodrigo Megía-Palma",
      "givenName": "Rodrigo",
      "familyName": "Megía-Palma",
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      "affiliation": {
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        "name": "Universidad Complutense de Madrid"
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    },
    {
      "@type": "Person",
      "name": "Prem Aguilar",
      "givenName": "Prem",
      "familyName": "Aguilar",
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        "name": "Universidad Complutense de Madrid"
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      "name": "Anamarija Zagar",
      "givenName": "Anamarija",
      "familyName": "Zagar",
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        "name": "National Institute of Biology"
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      "name": "Marcio Pie",
      "givenName": "Marcio",
      "familyName": "Pie",
      "affiliation": {
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        "sameAs": "https://ror.org/05syd6y78",
        "name": "Universidade Federal do Paraná"
      }
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    {
      "@type": "Person",
      "name": "Urban Dajcman",
      "givenName": "Urban",
      "familyName": "Dajcman",
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        "name": "National Institute of Biology"
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      "name": "Santiago Merino",
      "givenName": "Santiago",
      "familyName": "Merino",
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        "name": "Museo Nacional de Ciencias Naturales"
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        "sameAs": "https://ror.org/0020c4y69",
        "name": "Associação BIOPOLIS - Rede de Investigação em Biodiversidade e Biologia Evolutiva"
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      "familyName": "Martín",
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        "sameAs": "https://ror.org/02v6zg374",
        "name": "Museo Nacional de Ciencias Naturales"
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    "2025-08-04 22:31:00 UTC",
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    "2026-06-03 00:00:00 UTC",
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  "citation": "http://doi.org/10.1002/oik.12150",
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