Invasive crayfish: activity patterns of Procambarus clarkii in the rice fields of the Lower Guadalquivir (Spain)
Invasive crayfish: activity patterns of Procambarus clarkii in the rice fields of the Lower Guadalquivir (Spain)
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入侵小龙虾：瓜达尔基维尔河下游稻田中克氏原螯虾的活动模式（西班牙）
DOI：
10.1127/archiv-hydrobiol/150/2000/153
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
S. Barbaresi
中科院分区：
文献类型：
--
作者：
F. Gherardi;S. Barbaresi
利用传统和无线电遥测技术研究了入侵性新北极小龙虾克氏原螯虾（Procambarus clarkii）在下瓜达尔基维尔稻田（西班牙安达卢西亚）的自然种群的活动。我们的研究结果使我们提出，克拉氏螯虾表现出两种相反的活动模式，其特点是：(1)漫游阶段，没有任何日常周期性，以高速运动的短峰为特征；(2)更长的静止阶段，在此期间，小龙虾白天躲在洞穴里，只在黄昏时出现觅食。其他行为（如打架或交配）也发生在夜间。在漫游阶段，繁殖雄性在4天内移动17公里，覆盖范围广（4天内移动20公里）。装有无线电发射机的繁殖雄性在四天内被追踪到放生地点。这种密集的活动有助于这种物种的分散。需要进一步的研究来了解这种运动行为的适应性意义，这种行为看起来既昂贵又危险，以及家庭范围识别和定向的机制。
The activity of a naturalised population of the invasive Nearctic crayfish, Procambarus clarkii, in the Lower Guadalquivir rice fields (Andalucia, Spain), has been studied using both traditional and radio-telemetry techniques. Our results lead us to propose that P. clarkii shows two opposed patterns of activity, featuring (1) a wandering phase, without any daily periodicity, characterised by short peaks of high speed of locomotion, and (2) a longer stationary phase, during which crayfish hide in the burrows by day, emerging only at dusk to forage. Other behaviours (such as fighting or mating) also take place at night-time. During the wandering phase, breeding males move up to 17 km in 4 days and cover a wide area (up to 20 km 2 in 4 days). Breeding males fitted with radio-transmitters were tracked back to the point of release within four days. This intensive activity helps dispersion in this species. Further studies are required to understand the adaptive significance of this locomotory behaviour, which appears expensive and dangerous, and the mechanisms of home-range recognition and orientation.