Temperature impacts on lipid allocation among juvenile gadid species at the Pacific Arctic-Boreal interface: an experimental laboratory approach
Temperature impacts on lipid allocation among juvenile gadid species at the Pacific Arctic-Boreal interface: an experimental laboratory approach
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温度对太平洋北极-北方交界处幼年鳄类物种脂质分配的影响：一种实验实验室方法
DOI：
10.3354/meps12040
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发表时间：
2017
影响因子：
2.5
通讯作者：
A. Sremba
中科院分区：
文献类型：
--
作者：
L. Copeman;B. Laurel;M. Spencer;A. Sremba
气候变化对北极鱼类群落的影响将在很大程度上取决于栖息物种和入侵物种依赖温度的重要代谢率。在这项研究中，我们实验测量了2个幼年北极鳕（北极鳕鱼Boreogadus色达和Eleginus gracilis）和2个幼年北极鳕（狭鳕Gadus chalcogrammus和太平洋鳕鱼Gadus macrocephalus）的肝脏和肌肉中的总脂质和脂质类储存。在美国俄勒冈州纽波特的哈特菲尔德海洋科学中心，在5种温度（0、5、9、16和20°C）下进行了为期4周的实验。结果表明，明确的物种特异性的非线性效应的温度对脂质积累。北极鳕鱼表现出冷水、狭温反应，具有相对较高的脂质储存量（28 mg脂质g −1 WWT）和在0°C下生长。相比之下，鳕鱼表现出温暖的水，广温反应，在超过16°C的温度下生长，但在所有热栖息地中相对较低的脂质储存（10至17 mg脂质g −1 WWT）。北方种的脂质储存和生长呈圆顶状，在中等温度下明显更高（狭鳕的最大脂质值为44 mg脂质g −1 WWT，太平洋鳕鱼为28 mg脂质g −1 WWT）。此外，温度对生长和脂质储存的综合影响导致北方物种的脂质积累率（LAR）指数（4至11）高于北极物种（<3）。这些结果表明，在北极变暖将导致减少条件下，在居民中营养鱼类组合的情况下，更北方型的物种向极地转移。脂质密度峰的宽度（°C）。采用非线性二次方程解释了鳕鱼脂肪储存与培养温度之间的正相关关系;这里，Y是指鱼肝脏中的总脂肪或TAG密度，Y 0是0°C时的脂肪密度，a和B是常数，Ti是给定处理的温度（°C）。
: Climate change impacts on Arctic fish communities will largely be determined by temperature-dependent vital metabolic rates of resident and invading species. In this study, we experimentally measured total lipids and lipid class storage in the liver and muscle of 2 juvenile Arctic gadids (Arctic cod Boreogadus saida and saffron cod Eleginus gracilis) and 2 juvenile boreal gadids (walleye pollock Gadus chalcogrammus and Pacific cod Gadus macrocephalus) . Experiments were conducted over a 4 wk period across 5 temperatures (0, 5, 9, 16 and 20°C) at the Hatfield Marine Science Center in Newport, OR, USA. Results indicated clear species-specific non-linear effects of temperature on lipid accumulation. Arctic cod demonstrated a cold-water, stenothermic response with relatively high lipid storage (28 mg lipid g −1 WWT) and growth at 0°C. In contrast, saffron cod demonstrated a warmer-water, eurythermic response with elevated growth at temperatures beyond 16°C but comparatively low lipid storage across all thermal habitats (10 to 17 mg lipid g −1 WWT). Lipid storage and growth in the boreal species was dome-shaped and notably higher at intermediate temperatures (maximum lipid values of 44 mg lipid g −1 WWT for walleye pollock, 28 mg lipid g −1 WWT for Pacific cod). Further, the combined effects of temperature on both growth and lipid storage led to elevated lipid accumulation rate (LAR) indices in boreal species (4 to 11) compared to Arctic species (<3) at temperatures above 4°C. These results suggest that warming in the Arctic will lead to decreased condition in the resident mid-trophic fish assemblage in the absence of replacement by more boreal-type species shifting poleward. width of the lipid density peak (°C). A non-linear quadratic equation was used to explain the positive relationship between saffron cod lipid storage and culture temperature; here, Y refers to the total lipid or TAG density in fish livers, Y 0 is the lipid density at 0°C, a and b are constants, and T i is the temperature of a given treatment (°C)
气候变化对区域海洋初级生产的潜在影响：欧洲五个海洋的比较分析
影响因子：
4.1
作者：
Holt J
通讯作者：
Holt J
影响因子：
11.6
作者：
Defriez, Emma J.;Sheppard, Lawrence W.;Reuman, Daniel C.
通讯作者：
Reuman, Daniel C.