Waitzbauer Wolfgang
II. Zoologisches Institut der Universität, Dr. Karl Lueger-Ring 1, A-1010, Wien, Austria.
Oecologia. 1978 Jan;33(2):235-253. doi: 10.1007/BF00344851.
There is little information on the energy turnover of carnivorous water insects. This study concerns the energy flow through an imaginal population of the water scorpion, Nepra rubra, a water bug common in the lake "Neusiedler See" in eastern Austria.Population dynamics, production and respiration were determined from 1972 to 1975 under conditions as natural as possible. The cumulative sum of production energy is small, comprising 179.3 J for ♂♂ and 223.8 J for ♀♀, with an additional 241.6 J for reproduction. Food reserves, particularly fat accumulated in the fat body during prediapause, are utilized in winter and extensively by females during breeding the next spring. The largest fat content indicated for ♂♂ was 4.64 mg and 9.64 mg for ♀♀ (crude lipoids).The respiration rate is high even in winter. It is assumed that at this time oxygen is utilized exclusively for the oxydation of fats. Cumulative respiration energy for the adult stage was 2000.2 J for males and 3221.4 J for females. Total annual energy flow through a population of adults was about 663 kJ/100 m of which 596 kJ (=89%) were applied to respiration and 67 kJ (=11%) to production.
关于肉食性水生昆虫的能量周转情况，目前所知甚少。本研究关注的是红蝎蝽（Nepa rubra）成虫群体的能量流动，红蝎蝽是奥地利东部新锡德尔湖常见的一种水生蝽类昆虫。在尽可能自然的条件下，于1972年至1975年期间测定了其种群动态、生产量和呼吸量。生产能量的累积总和较小，雄性为179.3焦耳，雌性为223.8焦耳，另有241.6焦耳用于繁殖。食物储备，特别是滞育前在脂肪体中积累的脂肪，在冬季被利用，并且在次年春季繁殖期间雌性会大量利用。雄性的最大脂肪含量为4.64毫克，雌性为9.64毫克（粗脂质）。即使在冬季，呼吸速率也很高。据推测，此时氧气仅用于脂肪的氧化。成虫阶段雄性的累积呼吸能量为2000.2焦耳，雌性为3221.4焦耳。通过成虫群体的年总能量流约为663千焦/100平方米，其中596千焦（=89%）用于呼吸，67千焦（=11%）用于生产。
