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Author (up) Garcia-Huidobro, M.R.; Poupin, M.J.; Urrutia, C.; Rodriguez-Navarro, A.B.; Grenier, C.; Vivanco, J.F.; Ramajo, L.; Benjumeda, I.; Lagos, N.A.; Lardies, M.A. doi  openurl
  Title An intrapopulational study of organic compounds and biomechanical properties of the shell of the Antarctic bivalve Laternula elliptica (P. P. King, 1832) at King George Island Type
  Year 2021 Publication Polar Biology Abbreviated Journal Polar Biol.  
  Volume 44 Issue Pages 13431352  
  Keywords ALLOMETRIC SCALING LAWS; BRODERIP ANOMALODESMATA; SEASONAL ENERGETICS; OCEAN ACIDIFICATION; COLD ADAPTATION; MARINE MOLLUSKS; ORIGIN; MICROSTRUCTURE; METABOLISM; CAPACITY  
  Abstract Laternula elliptica is a key bivalve species and widely distributed around the Antarctic continent. This bivalve has been the study subject in several studies centered on ecological, physiological, biochemical, and behavioral patterns. However, little is known about the chemistry and the biomechanical properties of the shells of this mollusk. Here, we present the first report of the intra-population variability in the organic composition and mechanical properties of L. elliptica shells. Further, we analyze different morphological traits and their association with the metabolism of a population of L. elliptica from King George Island, Western Antarctic Peninsula. The summer metabolic rates and the hepatosomatic index values indicate good health conditions of this clam's population. Shell periostracum chemistry is quite similar to bivalves from temperate regions, but the relative amount of protein increased ca. five-fold in shells of L. elliptica. The microhardness is approximately 32% lower than in bivalves from temperate regions. Our characterization of the L. elliptica shells suggests that periostracum chemistry could be specially fitted to avoid shell carbon exposure to dissolution (e.g., in corrosive acidified seawater). In contrast, the reduction in shell hardness may result from prioritizing behavioral (burial) and shell repairing strategies to confront biological (predators) and physical disturbances (e.g., ice scouring). Similar studies in other Antarctic mollusks will help understand the role of shell structure and function in confronting projected climate changes in the Antarctic ocean.  
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  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0722-4060 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000652939100001 Approved  
  Call Number UAI @ alexi.delcanto @ Serial 1412  
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Author (up) Labra, F.A.; San Martin, V.A.; Jahnsen-Guzman, N.; Fernandez, C.; Zapata, J.; Garcia-Huidobro, M.R.; Duarte, C.; Garcia-Herrera, C.; Vivanco, J.F.; Lardies, M.A.; Lagos, N.A. doi  openurl
  Title Metabolic rate allometry in intertidal mussels across environmental gradients: The role of coastal carbonate system parameters in mediating the effects of latitude and temperature Type
  Year 2022 Publication Marine Pollution Bulletin Abbreviated Journal Mar. Pollut. Bull.  
  Volume 184 Issue Pages 114149  
  Keywords  
  Abstract We assess the role of direct and indirect effects of coastal environmental drivers (including the parameters of the carbonate system) on energy expenditure (MR) and body mass (M) of the intertidal mussel, Perumytilus pur-puratus, across 10 populations distributed over 2800 km along the Southern Eastern Pacific (SEP) coast. We find biogeographic and local variation in carbonate system variables mediates the effects of latitude and temperature on metabolic rate allometry along the SEP coast. Also, the fitted Piecewise Structural Equation models (PSEM) have greater predictive ability (conditional R2 = 0.95) relative to the allometric scaling model (R2 = 0.35). The largest standardized coefficients for MR and M were determined by the influence of temperature and latitude, followed by pCO2, pH, total alkalinity, and salinity. Thus, physiological diversity of P. purpuratus along the SEP coast emerges as the result of direct and indirect effects of biogeographic and local environmental variables.  
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  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0025-326X ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000876716300001 Approved  
  Call Number UAI @ alexi.delcanto @ Serial 1682  
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