{
  "annotation_id": "3f383d69-0b60-4a0c-a53e-98f9154ad2da",
  "date_created": "2026-03-02T18:01:31.932000Z",
  "date_modified": "2026-03-02T18:01:31.932000Z",
  "file_hash": "3393f002bd662bdf029f38f9409ba599726f07252ae48cde9946d92755d535be",
  "private": false,
  "record": {
    "abstract": "Observations of the evolution of species groups in nature, such as well\nrecognized Galapagos finches, have motivated much theoretical research aimed at\nunderstanding the processes associated with such radiations. The Penna model is\none such model and has been widely used to study aging. In this paper we use\nthe basic Penna model to investigate the process of sympatric speciation in a\nsimple food web model. Initially our web consists of a primary food source and\na single herbivore species that feeds on this resource. Subsequently we\nintroduce a predator that feeds on the herbivore. In both instances we directly\nmanipulate the food source, that is, its size distribution, and monitore the\nchanges in the populations structures. Sympatric speciation is obtained for the\nconsumer species in both webs, and our results confirm that the speciation\nvelocity depends on how far up,in the food chain, the focus population is\nfeeding. Simulations are done with three different sexual imprinting-like\nmechanisms, in order to discuss adaptation by natural selection.",
    "arxiv_id": "q-bio/0502010",
    "authors": [
      "K. Luz-Burgoa",
      "Tony Dell",
      "Toshinori Okuyama"
    ],
    "categories": [
      "q-bio.PE"
    ],
    "title": "Sympatric Speciation in a Simple Food Web",
    "url": "https://arxiv.org/abs/q-bio/0502010"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "51d69c69-64c3-4567-8efd-ff41ba51a70f",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}