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首页> 外文期刊>Archiv fur Hydrobiologie >Lipid content of stream macroinvertebrates
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Lipid content of stream macroinvertebrates

机译：流大型无脊椎动物的脂质含量

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Total lipid content of freshwater macroinvertebrates from different orders and with different life histories was investigated. Lipids were determined as HIP-extractable lipids (HIP = hexane: isopropanol). Macroinvertebrate taxa were assigned to different feeding guilds, and life histories for insect taxa: Gammarus pulex (Amphipoda/shredder), Ecdyonurus sp. (Ephemeroptera/hemimetabolous/grazer), Perla sp. (Plecoptera/hemimetabolous/predator), Hydrophsyche sp. (Trichoptera/holometaboious/ suspension feeder), and Atherix ibis (Diptera/holometabolous/predator). Animals were collected in two streams in Switzerland bimonthly between October 1994 and October 1995. Lipids, expressed as percent dry mass (dm), were estimated using two techniques: (1) as total lipid content, determined by the sulphophosphovanilline method; (2) as total fatty acids (= sum of fatty acids), determined by gas chromatography. The annual aver age total lipid contents for G. pulex, Ecdyonurus and Perla were 6.1 %, 7.0 % and 6.0 % dm, respectively. The two holometabolous insects, Hyduopsyche (8.0 %) and A. ibis (9.3 %), exhibited the highest total lipid content. Total fatty acids as a percentage of total lipids was lowest in G. pulex (62 %), followed by Ecdyonurus (64 %), Perla (73 %), Hydropsyche (80 %), and A. ibis (85 %). The dry mass of holometabolous insects (Hydropsyche and A. ibis) related positively with lipids, indicating an increase in body concentration during larval growth. No or only a weak positive relationship with dry mass was found for the hemimetabolous Ecdyonurus and Perla. Gammarus pulex, in contrast, showed a negative relationship. Male G. pulex attained a larger size and contained less fat than juveniles and adult females. Seasonal changes in total lipid content were recognisable only as weak trends because of high variation among individuals. Gammarus pulex had higher total lipid content in spring, while Perla and Hydropsyche maxima occurred in summer. No seasonal trends in total lipid content could be observed in Ecdyonurus and A. ibis. [References: 37]
机译：研究了不同生活史和不同生活史的淡水大型无脊椎动物的总脂质含量。脂质被确定为HIP可萃取的脂质（HIP =己烷：异丙醇）。大型无脊椎动物类群被分配到不同的饲养行会，而昆虫类群的生活史则是：伽玛鲁斯·普雷克斯（Amphipoda / shredder），Ecdyonurus sp.。 （星翅目/半代谢/放牧），Perla sp。 （鞘翅目/半代谢/捕食者），Hydrophsyche sp。 （Trichoptera / holometaboious /悬浮饲养者）和Atherix ibis（Diptera / holometabolous /捕食者）。在1994年10月至1995年10月之间，每两个月在瑞士的两个溪流中收集动物。使用两种技术估算以干质量百分数（dm）表示的脂质：（1）总脂质含量，由磺基磷酸凡尼林法测定; （2）作为总脂肪酸（=脂肪酸的总和），通过气相色谱法测定。 G. pulex，Ecdyonurus和Perla的年平均总脂质含量分别为dm的6.1％，7.0％和6.0％。 Hyduopsyche（8.0％）和A. ibis（9.3％）这两种全脂类昆虫表现出最高的总脂质含量。总脂肪酸（占总脂质的百分比）最低的是G. pulex（62％），其次是Ecdyonurus（64％），Perla（73％），Hydropsyche（80％）和A. ibis（85％）。整体代谢昆虫（Hydropsyche和A. ibis）的干重与脂质呈正相关，表明幼虫生长期间体内浓度增加。对于半代谢的Ecdyonurus和Perla，没有或仅有与干重的弱正相关。相比之下，伽玛鲁斯犬则呈负相关。与少年和成年雌性相比，雄性G. pulex体型更大，脂肪含量更低。总脂含量的季节性变化仅因个体间差异较大而被认为是弱趋势。春季的γ-粉虱有较高的总脂质含量，而夏季则有Perla和Hydropsyche maxima。在Ecdyonurus和A. ibis中没有观察到总脂质含量的季节性趋势。 [参考：37]

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