Department of Cell Biology, Federal University of Paraná, Centro Politécnico s/No, Curitiba, PR, 81530-130, Brazil.
Fish Physiol Biochem. 2013 Dec;39(6):1591-601. doi: 10.1007/s10695-013-9811-9. Epub 2013 Jun 9.
The adaptive evolution of the Notothenia rossii occurred under the selective pressure of stable and low temperatures. It is an opportunistic feeder of Antarctic krill and the fluoride in the krill carapace is apparently not toxic. We investigated the interactive effect of fluoride, elevated temperatures, and low salinity on the plasmatic constituents of this Antarctic fish. The experiments were conducted at the Brazilian Antarctic Station Comandante Ferraz (EACF), located on King George Island. The Antarctic fish N. rossii was acclimatized to eight thermo-saline-trophic conditions, combining two temperatures (0 and 4 °C), two salinities (35 and 20), and two trophic conditions (with/without fluoride) for an 11-day period. Trophic fluoride was not able to alter the plasmatic levels of glucose, cholesterol, plasmatic protein, Cl⁻, Mg²⁺, Ca²⁺, and inorganic phosphate, but induced an acute elevation of triglycerides at 0 °C and salinity of 35. At low salinity, hyperglycemia, hypertriglyceridemia, and hypocalcemia were observed. The thermo-saline interaction at 4 °C was able to minimize the effects of fluoride and low salinity on the plasmatic constituents levels.
南极鳕鱼（Notothenia rossii）的适应进化是在稳定低温的选择压力下发生的。它是南极磷虾的机会主义捕食者，磷虾壳中的氟显然没有毒性。我们研究了氟化物、高温和低盐度对这种南极鱼类血浆成分的交互作用。实验在巴西南极站费拉兹指挥官（EACF）进行，位于乔治王岛。南极鳕鱼 N.rossii 适应了八种热盐度营养条件，结合了两种温度（0 和 4°C）、两种盐度（35 和 20）和两种营养条件（有/无氟化物），适应期为 11 天。营养氟化物不能改变葡萄糖、胆固醇、血浆蛋白、Cl⁻、Mg²⁺、Ca²⁺和无机磷酸盐的血浆水平，但在 0°C 和 35 盐度下会引起甘油三酯的急性升高。在低盐度下，会出现高血糖、高甘油三酯血症和低钙血症。4°C 时的热盐相互作用能够最大限度地减少氟化物和低盐度对血浆成分水平的影响。
