• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Biology Bulletin >Cold Hardiness, Adaptive Strategies, and Invasion of Slugs of the Genus Deroceras (Gastropoda, Pulmonata) in Northeastern Asia
【24h】

Cold Hardiness, Adaptive Strategies, and Invasion of Slugs of the Genus Deroceras (Gastropoda, Pulmonata) in Northeastern Asia

机译：耐寒性，适应策略和东北亚地龙属（天麻，肺病）的of侵袭

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Four species of slugs have been identified in the vicinity of Magadan: Deroceras laeve, D. altaicum, D. reticulatum, and D. agreste. They exemplify three different life cycle schemes, with D. reticulatum and D. altaicum wintering at the egg phase; D. laeve, at the slug phase; and D. agreste, at either phase. The D. altaicum and D. reticulatum slugs and D. laeve eggs are intolerant of subzero temperatures. D. laeve's tolerate freezing and survive at temperatures below -28℃. The eggs of other species, which lose up to 35% of water upon cooling, can withstand temperatures as low as -15 to -17℃ (D. altaicum), -25℃ (D. agreste), and -35℃ (D. reticulatum). According to preliminary data, D. agreste slugs survive at temperatures down to - 10℃. The almost ubiquitous distribution of D. laeve in regions with cool summers (including zonal tundras) is accounted for not so much by the high rate of ontogeny as by its significant cold hardiness and ability to winter at different phases of the life cycle (except for the egg phase), which allows the period of development to be prolonged for the next seasons. The last is confirmed by the fact that the slugs collected before and after hibernation proved to have identical patterns of distribution by body weight. Three species of slugs introduced in the vicinity of Magadan fail to spread inland. In the case of D. reticulatum, this is explained primarily by the fact that the frost-free season in inland areas is too short to allow these slugs to complete ontogeny and lay eggs. The barriers to their expansion appear to be insuperable, since this process remains unsuccessful over no less than 75-80 years.
机译：在马加丹附近，已经发现了四种：Deroceras laeve，D。altaicum，D。reticulatum和D. agreste。他们举例说明了三种不同的生命周期方案，即网状线虫和阿尔泰线虫在卵期越冬。 D. laeve，处于阶段；和D. agreste，在任一阶段。 D. altaicum和D. reticulatum ug和D. laeve卵不能忍受零下温度。 D. laeve可以耐冰冻并在-28℃以下的温度下存活。其他种类的鸡蛋在冷却后会损失多达35％的水分，它们的温度可以承受-15至-17℃（D。altaicum），-25℃（D。agreste）和-35℃（D网状）。根据初步数据，D。agreste可在低至-10℃的温度下生存。在夏季凉爽的地区（包括带状苔原）几乎无处不在的D. laeve分布，与其说是高个体发育率，还不如说是其显着的耐寒性和在生命周期不同阶段的越冬能力（除了卵期），可以将发育期延长到下一个季节。最后一个事实被证实，冬眠前后收集的the具有相同的体重分布模式。在马加丹附近引入的三种species未能扩散到内陆。对于网状石楠，这主要是因为内陆地区的无霜季节太短而无法让这些完成个体发育并产卵。扩张的障碍似乎是无法克服的，因为这一过程在不少于75-80年的时间内仍然没有成功。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号