Permalink : http://hdl.handle.net/2115/89124

JaLCDOI : 10.14943/lowtemsci.81.11

KEYWORDS : 陸貝;季節適応;光周性;温度順化;低温耐性;Terrestrial mollusks;seasonal adaptation;photoperiodic response;acclimation;cold tolerance

地球上のほとんどの場所で環境は季節的に変化している．冬の低温は変温動物である無脊椎動物にとって，生存に関わる重要な環境要因である．無脊椎動物の低温耐性は，節足動物，特に昆虫において広く研究されてきた．その一方で，昆虫と同様に地上で冬を過ごす陸貝，主にナメクジ類の低温耐性を含めた季節適応機構の研究は進んでいない．本論文では，著者が対象としてきたチャコウラナメクジでの生活史や低温耐性研究の成果および，他のナメクジ類での低温耐性研究を紹介する．
The environment changes seasonally in most parts of the earth. Low temperature in winter is an important environmental factor in the survival of invertebrates. Cold tolerance in invertebrates has been extensively studied in arthropods, mainly insects. On the other hand, the mechanisms of seasonal adaptation, including overwintering strategy, in terrestrial mollusks, especially slugs have not been well understood. This paper introduces the researches of life cycle and cold tolerance in the terrestrial slug, Ambigolimax valentianus. In addition, previous studies of cold tolerance in other terrestrial slugs are briefly reviewed.