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Field Measurements Indicate Unexpected, Serious Underestimation of Mussel Heart Rates and Thermal Tolerance by Laboratory Studies

Tagliarolo, Morgana ; McQuaid, Christopher D Khim, Jong Seong

PloS one, 2016-02, Vol.11 (2), p.e0146341-e0146341 [Periódico revisado por pares]

United States: Public Library of Science

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  • Título:
    Field Measurements Indicate Unexpected, Serious Underestimation of Mussel Heart Rates and Thermal Tolerance by Laboratory Studies
  • Autor: Tagliarolo, Morgana ; McQuaid, Christopher D
  • Khim, Jong Seong
  • Assuntos: Adaptation, Physiological ; Animal behavior ; Animals ; Animals, Laboratory - physiology ; Body Temperature ; Body temperatures ; Carcinus maenas ; Daytime ; Environment ; Environmental changes ; Experiments ; Heart diseases ; Heart Rate ; High temperature ; Hot Temperature ; Immersion ; Laboratories ; Laboratory experiments ; Mollusks ; Mytilus edulis ; Perna - physiology ; Perna perna ; Physiology ; Studies ; Temperature ; Temperature tolerance ; Thermal stress ; Zoology
  • É parte de: PloS one, 2016-02, Vol.11 (2), p.e0146341-e0146341
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
    Competing Interests: The authors have declared that no competing interests exist.
    Current address: University of KwaZulu-Natal, School of life science, Biological science building, Westville campus, 4000, Durban, South Africa
    Conceived and designed the experiments: MT. Performed the experiments: MT. Analyzed the data: MT. Contributed reagents/materials/analysis tools: CDM. Wrote the paper: MT CDM.
  • Descrição: Attempts to predict the response of species to long-term environmental change are generally based on extrapolations from laboratory experiments that inevitably simplify the complex interacting effects that occur in the field. We recorded heart rates of two genetic lineages of the brown mussel Perna perna over a full tidal cycle in-situ at two different sites in order to evaluate the cardiac responses of the two genetic lineages present on the South African coast to temperature and the immersion/emersion cycle. "Robomussel" temperature loggers were used to monitor thermal conditions at the two sites over one year. Comparison with live animals showed that robomussels provided a good estimate of mussel body temperatures. A significant difference in estimated body temperatures was observed between the sites and the results showed that, under natural conditions, temperatures regularly approach or exceed the thermal limits of P. perna identified in the laboratory. The two P. perna lineages showed similar tidal and diel patterns of heart rate, with higher cardiac activity during daytime immersion and minimal values during daytime emersion. Comparison of the heart rates measured in the field with data previously measured in the laboratory indicates that laboratory results seriously underestimate heart rate activity, by as much as 75%, especially during immersion. Unexpectedly, field estimates of body temperatures indicated an ability to tolerate temperatures considered lethal on the basis of laboratory measurements. This suggests that the interaction of abiotic conditions in the field does not necessarily raise vulnerability to high temperatures.
  • Editor: United States: Public Library of Science
  • Idioma: Inglês
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