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Oxidative stress and antioxidative defense in cephalopods: a function of metabolic rate or age?
- S. Zielinski, H. Pörtner
- Biology, Medicine
- Comparative biochemistry and physiology. Part B…
- 1 February 2000
Comparison with other ectothermic animals showed both cephalopod species to have a low enzymatic antioxidative status despite their high metabolic rate, and the low level of antioxidative defense might allow for the significant age-induced rise in MDA levels in gills and mantle musculature and for the increase in lipofuscin levels in mantle and brain tissue. Expand
Intracellular pH and energy metabolism in the highly stenothermal Antarctic bivalve Limopsis marionensis as a function of ambient temperature
Stenothermality is discussed, not only as reflecting the permanent and very stable low temperature in the natural environment, but also regarding dif- ferences in the level of activity and aerobic scope. Expand
Temperature Effects on Hemocyanin Oxygen Binding in an Antarctic Cephalopod
The findings suggest that the lower metabolic rate of octopods and cuttlefish compared to squid is reflected in less pH-dependent oxygen transport, which will reduce metabolic scope and thereby contribute to their stenothermality. Expand
Energy metabolism and ATP free-energy change of the intertidal worm
The intertidal worm Sipunculus nudus was exposed to various temperatures for an analysis of the integrated changes in energy and acid-base status. Animals were incubated in sea water or maintained… Expand
Environmental constraints and the physiology of performance in squids
The physiological and biochemical background of muscular performance in squid from different environments is reviewed and the physiological and environmental factors limiting performance levels are addressed. Expand
Energy metabolism and ATP free-energy change of the intertidal wormSipunculus nudus below a critical temperature
A low critical temperature indicating the onset of cold-induced anaerobiosis is concluded to exist below 4°C owing to the insufficient response of the ventilatory system to the developing hypoxia. Expand
Metabolic performance of the squid Lolliguncula brevis (Cephalopoda) during hypoxia: an analysis of the critical PO2
Results indicate that hypoxia at 2.8 kPa (14.5% air saturation) rapidly takes Lolliguncula brevis to the limits of performance, however, it is probably capable of withstanding longer periods of moderate Hypoxia close to 50%Air saturation (9.7 kPa), enabling the squids to cope with oxygen fluctuations in their shallow estuarine environment or to dive into hypoxic waters by use of their economic jetting strategy. Expand
The Influence Of Isomerised Plant Oils With High Content Of Conjugated Dienes Of Linoleic Acids c9,t11 And t10,c12 On The Fat Reduction In The Carcass And Meat of Lamb
An influence of isomerised poppy seed oil on lamb body fat and fat content in meat, and also fatty acids content was determined in the research. As a result of poppy seed oil isomerisation, the… Expand
Vermiculite - a carrier for feed additives.