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Male mastodon landscape use changed with maturation (late Pleistocene, North America).
Miller, Joshua H; Fisher, Daniel C; Crowley, Brooke E; Secord, Ross; Konomi, Bledar A.
Afiliación
  • Miller JH; Department of Geology, University of Cincinnati, Cincinnati, OH 45221.
  • Fisher DC; Museum of Paleontology, University of Michigan, Ann Arbor, MI 48109.
  • Crowley BE; Department of Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI 48109.
  • Secord R; Department of Geology, University of Cincinnati, Cincinnati, OH 45221.
  • Konomi BA; Department of Anthropology, University of Cincinnati, Cincinnati, OH 45221.
Proc Natl Acad Sci U S A ; 119(25): e2118329119, 2022 06 21.
Article en En | MEDLINE | ID: mdl-35696566
Under harsh Pleistocene climates, migration and other forms of seasonally patterned landscape use were likely critical for reproductive success of mastodons (Mammut americanum) and other megafauna. However, little is known about how their geographic ranges and mobility fluctuated seasonally or changed with sexual maturity. We used a spatially explicit movement model that coupled strontium and oxygen isotopes from two serially sampled intervals (5+ adolescent years and 3+ adult years) in a male mastodon tusk to test for changes in landscape use associated with maturation and reproductive phenology. The mastodon's early adolescent home range was geographically restricted, with no evidence of seasonal preferences. Following inferred separation from the matriarchal herd (starting age 12 y), the adolescent male's mobility increased as landscape use expanded away from his natal home range (likely central Indiana). As an adult, the mastodon's monthly movements increased further. Landscape use also became seasonally structured, with some areas, including northeast Indiana, used only during the inferred mastodon mating season (spring/summer). The mastodon died in this area (>150 km from his core, nonsummer range) after sustaining a craniofacial injury consistent with a fatal blow from a competing male's tusk during a battle over access to mates. Northeast Indiana was likely a preferred mating area for this individual and may have been regionally significant for late Pleistocene mastodons. Similarities between mammutids and elephantids in herd structure, tusk dimorphism, tusk function, and the geographic component of male maturation indicate that these traits were likely inherited from a common ancestor.
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Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Asunto principal: Conducta Sexual Animal / Extinción Biológica / Mastodontes Límite: Animals País/Región como asunto: America do norte Idioma: En Revista: Proc Natl Acad Sci U S A Año: 2022 Tipo del documento: Article

Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Asunto principal: Conducta Sexual Animal / Extinción Biológica / Mastodontes Límite: Animals País/Región como asunto: America do norte Idioma: En Revista: Proc Natl Acad Sci U S A Año: 2022 Tipo del documento: Article