Intracellular pH and energy metabolism in the highly stenothermal Antarctic bivalve Limopsis marionensis as a function of ambient temperature

Pörtner, Hans‐Otto; Peck, Lloyd S.; Zielinski, S.; Conway, Lucy Z.

doi:10.1007/s003000050386

Cited by 114 publications

(66 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the case of marine organisms measurement periods over several days or weeks may be required, since metabolic changes in some species may only develop over days and will stabilize very slowly [8].…”

Section: Practical Considerations and Methodsmentioning

confidence: 99%

In vivo MR spectroscopy and MR imaging on non-anaesthetized marine fish: techniques and first results

Bock

Sartoris

Pörtner

2002

Magnetic Resonance Imaging

View full text Add to dashboard Cite

In vivo Magnetic Resonance Imaging (MRI) and Spectroscopy (MRS) experiments were carried out in non-anaesthetized marine fish with a maximum body length of 40 cm using a 4.7 T horizontal magnet. In flow-through animal chambers long-term investigations could be carried out for several days in a sessile benthic zoarcid species, the eelpout Zoarces viviparus, as well as in a pelagic gadid species, the cod Gadus morhua. Sea water adapted probes and optimised excitation and refocusing pulse shapes reduced the negative effects of the highly conductive medium. In both species, in vivo 31 P-NMR spectra were collected within 5 minutes with a reasonable signal to noise ratio (PCr/Pi ratio Ͼ 40 in cod) and typical line widths in the range of 20 to max. 40 Hz. Magnetic resonance images were recorded in the sessile species without movement artefacts. In these fish it was even possible to measure the blood flow of different vessels with a flow compensated gradient echo sequence and to carry out localized in vivo 1 H-NMR spectroscopy in different organs.

show abstract

Section: Practical Considerations and Methodsmentioning

confidence: 99%

In vivo MR spectroscopy and MR imaging on non-anaesthetized marine fish: techniques and first results

Bock

Sartoris

Pörtner

2002

Magnetic Resonance Imaging

View full text Add to dashboard Cite

show abstract

“…Low upper-lethal temperatures have been observed in the Antarctic brachiopod, Liothyrella uva between 3°C and 4.5°C (Peck 1989). Po¨rtner et al (1999a) found a short-term upper lethal temperature of 4°C and a long-term upper limit of around 2°C in the bivalve Limopsis marionensis. An upper-lethal temperature of 6°C was found in three species of the Antarctic fish Trematomus by Somero and de Vries (1967).…”

Section: Introductionmentioning

confidence: 92%

Aerobic mitochondrial capacities in Antarctic and temperate eelpout (Zoarcidae) subjected to warm versus cold acclimation

2005

View full text Add to dashboard Cite

Capacities and effects of cold or warm acclimation were investigated in two zoarcid species from the North Sea (Zoarces viviparus) and the Antarctic (Pachycara brachycephalum) by investigating temperature dependent mitochondrial respiration and activities of citrate synthase (CS) and NADP + -dependent isocitrate dehydrogenase (IDH) in the liver. Antarctic eelpout were acclimated to 5°C and 0°C (controls) for at least 10 months, whereas boreal eelpout, Z. viviparus (North Sea) were acclimated to 5°C and to 10°C (controls). Liver sizes were found to be increased in both species in the cold, with a concomitant rise in liver mitochondrial protein content. As a result, total liver state III rates were elevated in both cold-versus and warm-exposed P. brachycephalum and Z. viviparus, with the highest rates in boreal eelpout acclimated to 5°C. CS and IDH activities in the total liver were similar in Z. viviparus acclimated to 5°C and 10°C, but decreased in those warm acclimated versus control P. brachycephalum. Enzyme capacities in the total liver were higher in eelpout from Antarctica than those from the North Sea. In conclusion, cold compensation of aerobic capacities in the liver seems to be linked to an increase in organ size with unchanged specific mitochondrial protein content. Despite its life in permanently cold climate, P. brachycephalum was able to reduce liver aerobic capacities in warm climate and thus, displayed a capacity for temperature acclimation.

show abstract

“…N. concinna foot tissue is buffered by CaCO 2 and, therefore, pH-changes cannot be reliably measured in this tissue (Pörtner et al, 1999) for comparison between groups.…”

Section: Tissue Phmentioning

confidence: 99%

Differences in heavy metal concentrations and in the response of the antioxidant system to hypoxia and air exposure in the Antarctic limpet Nacella concinna

Weihe

Kriews

Abele

2010

Marine Environmental Research

View full text Add to dashboard Cite

Intracellular pH and energy metabolism in the highly stenothermal Antarctic bivalve Limopsis marionensis as a function of ambient temperature

Cited by 114 publications

References 33 publications

In vivo MR spectroscopy and MR imaging on non-anaesthetized marine fish: techniques and first results

In vivo MR spectroscopy and MR imaging on non-anaesthetized marine fish: techniques and first results

Aerobic mitochondrial capacities in Antarctic and temperate eelpout (Zoarcidae) subjected to warm versus cold acclimation

Differences in heavy metal concentrations and in the response of the antioxidant system to hypoxia and air exposure in the Antarctic limpet Nacella concinna

Contact Info

Product

Resources

About