Nicotinamide nucleotide and adenylate concentrations in mante, siphon and gill tissue of old and young Laternula elliptica individuals under control and experimental conditions ...

• Main Authors: Clark, Melody S, Husmann, Gunnar, Thorne, Michael A, Burns, Gavin, Truebano, Manuela, Peck, Loyd S, Abele, Doris, Philipp, Eva E R
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2013
• Subjects: Biology; Jubany_Dallmann; Carlini/Jubany Station; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158; Arctic; Antarctic; The Antarctic; Gunnar; Thorne; Antarc*; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.847351; https://doi.pangaea.de/10.1594/PANGAEA.847351

Future oceans are predicted to contain less oxygen than at present. This is because oxygen is less soluble in warmer water and predicted stratification will reduce mixing. Hypoxia in marine environments is thus likely to become more widespread in marine environments and understanding species-responses is important to predicting future impacts on biodiversity. This study used a tractable model, the Antarctic clam, Laternula elliptica, which can live for 36 years, and has a well-characterized ecology and physiology to understand responses to hypoxia and how the effect varied with age. Younger animals had a higher condition index, higher adenylate energy charge and transcriptional profiling indicated that they were physically active in their response to hypoxia, whereas older animals were more sedentary, with higher levels of oxidative damage and apoptosis in the gills. These effects could be attributed, in part, to age-related tissue scaling; older animals had proportionally less contractile muscle mass and ... : Supplement to: Clark, Melody S; Husmann, Gunnar; Thorne, Michael A; Burns, Gavin; Truebano, Manuela; Peck, Loyd S; Abele, Doris; Philipp, Eva E R (2013): Hypoxia impacts large adults first: consequences in a warming world. Global Change Biology, 19(7), 2251-2263 ...