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首页> 外文期刊>Bulletin de la Societe Zoologique de France >HIBERNATION ET RESISTANCE AU FROID CHEZ L'ESCARGOT PETIT-GRIS CORNU ASPERSUM (SYN. HELIX ASPERSA; GASTEROPODE, PULMONE)
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HIBERNATION ET RESISTANCE AU FROID CHEZ L'ESCARGOT PETIT-GRIS CORNU ASPERSUM (SYN. HELIX ASPERSA; GASTEROPODE, PULMONE)

机译：灰ASP小钉（SYN。HELIX ASPERSA； GASTEROPOD，肺）中的耐寒性和抗寒性

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In Brittany, the land snail Cornu aspersum Mueller (syn. Helix aspersa) (Gastropoda, Pulmonata) begins to hibernate on October, over the mixed action of decreasing day-length and low temperatures. This species possesses a low ability to supercool and can survive ice formation in its tissues for short exposures without consequences in the long term on growth and reproduction; it can be considered partially tolerant to freezing. During winter, under the action of decreasing daylength, survival to subzero temperature is enhanced mostly by installation in overwintering niches and moderate extension of the supercooling ability. This one is triggered by several features, exhibited by the animal and through the dormancy process: (1) the decrease of the water mass concentrates solutes and diminishes the nucleation probability, (2) the presence of the epiphragm, together with the shell, prevents the snail from inoculative freezing, (3) starvation due to the inactive state allows the clearance of potential ice nucleating agents present in the digestive tract. The relatively large size of this snail, its particular body shape and the presence of the shell generate a certain tolerance to freezing. This ability does not seem to have an adaptive value in the study environment, as temperatures are rarely below the individuals' temperature of crystallization. However, it could be an essential component of the cold hardiness strategy for snails from colder environments. In term of cold hardiness strategy, C. aspersum exhibits an intermediate status, between that of Insects and Vertebrates more commonly studied. It may have consequences on the evolution of terrestrial snails to colder environments.
机译：在布列塔尼，由于日长减少和低温的混合作用，陆地蜗牛科努（Cornu aspersum）Mueller（syn。Helix aspersa）（加斯波达（Pastromonata））于10月开始冬眠。这种物种过冷的能力很弱，并且可以在其组织中的冰形成中幸免于短时间的暴露，而不会长期影响其生长和繁殖。它可以被认为是“部分耐受冷冻”。在冬季，在减少日照长度的作用下，主要通过安装在越冬的壁and中和过适度扩展过冷能力，可以提高至零度以下温度的存活率。这是由动物表现出的几个特征以及在休眠过程中触发的：（1）水团的减少集中了溶质并减少了成核的可能性，（2）上ph与壳的存在阻止了（3）由于处于非活动状态而导致饥饿，它可以清除消化道中存在的潜在冰成核剂。这种蜗牛的相对较大的尺寸，其特殊的体形和外壳的存在会产生一定程度的抗冻性。这种能力在研究环境中似乎没有适应性价值，因为温度很少低于个体的结晶温度。但是，对于来自较冷环境的蜗牛来说，它可能是抗寒策略的重要组成部分。就抗寒策略而言，C。aspersum处于中等水平，介于昆虫和脊椎动物之间。它可能会对陆地蜗牛向寒冷环境的进化产生影响。

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