12 research outputs found
Sleep quality, chronotype, temperament and bipolar features as predictors of depressive symptoms among medical students
Variation in fat content between liver lobes and comparison with histopathological scores in dairy cows with fatty liver
Influence of Liver Biopsy Heterogeneity and Diagnosis of Nonalcoholic Steatohepatitis in Subjects Undergoing Gastric Bypass
In vivo redox metabolic imaging of mitochondria assesses disease progression in non-alcoholic steatohepatitis
Life history traits and reproductive mode of the tardigrade Acutuncus antarcticus under laboratory conditions: strategies to colonize the Antarctic environment
Global climate change has become an important issue, particularly for organisms living in
the Antarctic region, as the predicted temperature increase can affect their life history traits. The reproductive mode and life history traits of one of the most widespread species of tardigrades in Antarctica were analyzed. Specimens of the eutardigrade Acutuncus antarcticus from a temporary freshwater pond at Victoria Land (Antarctica) were individually
cultured. This species reproduced continuously by thelytokous meiotic parthenogenesis. Its life cycle was short (60–90 days) and the reproductive output was low, with a short generation time (25–26 days). The maternal effect can be responsible of the phenotypic
plasticity observed in life history traits of the three analyzed generations that may be seen as a bethedging strategy, as also observed in other animals inhabiting stochastic environments. These traits, along with the cryptobiotic capability of A. antarcticus, are advantageous for exploiting the conditions suitable for growth and reproduction during the short Antarctic
summer, and can explain its wide distribution on the Antarctic continent. These results open new avenues of research for determining the role of bet-hedging strategy in organisms living in unpredictable environments