4 Works

Data from: Hippocampal neurogenesis regulates forgetting during adulthood and infancy

Katherine G. Akers, Alonso Martinez-Canabal, Leonardo Restivo, Adelaide P. Yiu, Antonietta De Cristofaro, , Anne L. Wheeler, Axel Guskjolen, Yosuke Niibori, Hirotaka Shoji, Koji Ohira, Blake A. Richards, Tsuyoshi Miyakawa, Sheena A. Josselyn & Paul W. Frankland
Throughout life, new neurons are continuously added to the dentate gyrus. As this continuous addition remodels hippocampal circuits, computational models predict that neurogenesis leads to degradation or forgetting of established memories. Consistent with this, increasing neurogenesis after the formation of a memory was sufficient to induce forgetting in adult mice. By contrast, during infancy, when hippocampal neurogenesis levels are high and freshly-generated memories tend to be rapidly forgotten (infantile amnesia), decreasing neurogenesis after memory formation...

Data from: Low-quality birds do not display high-quality signals: the cysteine-pheomelanin mechanism of honesty

Ismael Galván, Kazumasa Wakamatsu, Pablo R. Camarero, Rafael Mateo & Carlos Alonso-Alvarez
The mechanisms that make that the costs of producing high-quality signals are unaffordable to low-quality signalers are a current issue in animal communication. The size of the melanin-based bib of male house sparrows Passer domesticus honestly signals quality. We induced the development of new bibs while treating males with buthionine-sulfoximine (BSO), a substance that depletes the levels of the antioxidant glutathione and the amino acid cysteine, two elements that switch melanogenesis from eumelanin to pheomelanin....

Data from: Chronic exposure to low-dose radiation at Chernobyl favours adaptation to oxidative stress in birds

Ismael Galván, Andrea Bonisoli-Alquati, Shanna Jenkinson, Ghanem Ghanem, Kazumasa Wakamatsu, Timothy A. Mousseau & Anders P. Møller
1. Ionizing radiation produces oxidative stress, but organisms can adapt to their exposure with physiological adaptive responses. However, the role of radioadaptive responses in wild populations remains poorly known. 2. At Chernobyl, studies of birds and other taxa including humans show that chronic exposure to radiation depletes antioxidants and increases oxidative damage. Here we present analyses of levels of the most important intracellular antioxidant (i.e., glutathione, GSH), its redox status, DNA damage and body condition...

Data from: Heterospecific female mimicry in Ficedula flycatchers

Sara Calhim, Peter Adamík, Pauliina Järvistö, Paula Leskinen, János Török, Kazumasa Wakamatsu & Toni Laaksonen
Mimicry is a widespread phenomenon. Vertebrate visual mimicry often operates in an intraspecific sexual context, with some males resembling conspecific females. Pied flycatcher (Ficedula hypoleuca) dorsal plumage varies from the ancestral black to female-like brown. Experimental studies have shown that conspecific and heterospecific (collared flycatcher, F. albicollis) individuals of both sexes respond, at least initially, to brown individuals as if they were female. We quantified the perceptual and biochemical differences between brown feathers and found...

Registration Year

  • 2014
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Resource Types

  • Dataset
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Affiliations

  • Fujita Health University
    4
  • Estación Biológica de Doñana
    1
  • Institute for Game and Wildlife Research
    1
  • Université Libre de Bruxelles
    1
  • University of Paris-Sud
    1
  • University of South Carolina
    1
  • Museo Nacional de Ciencias Naturales
    1
  • SickKids Foundation
    1
  • Palacký University, Olomouc
    1
  • University of Jyväskylä
    1