Arakelova E S
Zh Obshch Biol. 2008 Nov-Dec;69(6):471-8.
Lipid composition of digestive gland and pedal muscle of two northern freshwater pulmonate snails Lymnaea stagnalis and Lymnaea ovata and three marine prosobranch gastropods Littorina obtusata, Littorina littorea, Buccinum undatum from the White Sea was studied. The species differ in ecology, particularly in trophic nabits and motor activity. The content of triacilglycerides both in digestive gland and pedal was higher in littoral dwellers Littorina the activity of which depends on the tide level. The phospholipids content in digestive gland does not differ in quantity in all cases and does not relate to type of feeding or resource quality. In a pedal muscle of marine species the quantity of common phospholipids is higher in comparison with the freshwater ones. The amount of total phospholipids in pedal muscle correlates with mass of metabolic inert formation which constitutes a part of whole mass of snails. The presence of massive shell enhances demands in energy needed for supporting movement and activity. Because the intensity of energy metabolism is related to quantity of total phospholipids, mitochondria and activity of their oxidizing ferments, the presence of thick shell in marine snails together with motor activity costs more in terms of energy than in freshwater snails with thin shell. This hypothesis is supported by the higher specific rate of oxygen consumption in marine snails than in freshwaters.
对来自白海的两种北方淡水肺螺蜗牛——椎实螺和卵形椎实螺，以及三种海生前鳃腹足类动物——钝拟滨螺、滨螺和疣荔枝螺的消化腺和足部肌肉的脂质组成进行了研究。这些物种在生态方面存在差异，特别是在食性和运动活动方面。潮间带栖息的滨螺消化腺和足部中的甘油三酯含量较高，其活动取决于潮位。在所有情况下，消化腺中磷脂的含量在数量上没有差异，并且与摄食类型或资源质量无关。与淡水物种相比，海生物种足部肌肉中常见磷脂的含量更高。足部肌肉中总磷脂的含量与构成蜗牛整体质量一部分的代谢惰性结构的质量相关。厚重外壳的存在增加了支持运动和活动所需的能量需求。由于能量代谢强度与总磷脂的数量、线粒体及其氧化酶的活性有关，因此与薄壳淡水蜗牛相比，海生蜗牛中厚壳的存在以及运动活动在能量方面的成本更高。这一假设得到了海生蜗牛比淡水蜗牛更高的单位耗氧率的支持。
