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首页> 外文期刊>Ethology >Experimental Change of the Orientation of Two Populations of Talitrus saltator (Crustacea Amphipoda Talitridae) from Cap Bon (North-Eastern Tunisia)
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Experimental Change of the Orientation of Two Populations of Talitrus saltator (Crustacea Amphipoda Talitridae) from Cap Bon (North-Eastern Tunisia)

机译：来自Cap Bon（东北突尼斯）的两个Talitrus盐分种群（甲壳纲Amphipoda Talitridae）取向的实验变化

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The orientation of sandhopper populations is adapted to the direction of the shoreline of the sandy beaches where they live; this behaviour was shown to be inherited in some Mediterranean populations. The question was open whether this behaviour could be adaptively modified in case of changing shoreline or passive transfer to a new differently oriented shoreline. The Cap Bon beaches in north-eastern Tunisia are particularly interesting because they belong to two different Mediterranean Basins, the central and the eastern one, and their supra-tidal populations do not come together. This work verified the effect of experimental change of the shoreline direction in two populations of Talitrus saltator from Cap Bon (north-eastern Tunisia) through a displacement experiment. We transferred samples of T.saltator from two different localities (Korba and Ratiba) from their original beach to the familiar one and tested their solar and landscape orientation on the new beach that had an almost opposite direction with respect to the previous one. The comparisons of the results on the home beach and the new one confirmed the use of the solar compass in both populations, as well as the importance of landscape view and optical local sky factor in adjusting the escape direction. In both populations, an increase of scatter was observed on the new beach, especially when individuals could see the landscape. Also, a clear behavioural difference between the two populations was recorded, being Ratiba population not significantly oriented to the shoreline when tested on the unfamiliar beach, while Korba population maintained its home direction also on the new beach.
机译：沙漏种群的方向适应于他们所居住的沙滩的海岸线方向。事实证明，这种行为在某些地中海人口中是遗传的。问题在于是否可以在改变海岸线或被动转移到新的不同取向的海岸线的情况下自适应地改变这种行为。突尼斯东北部的Cap Bon海滩特别有趣，因为它们属于两个不同的地中海盆地，中部和东部，而它们的超潮种群并没有在一起。这项工作通过位移实验验证了Cap Bon（突尼斯东北部）的两个Talitrus盐分种群的海岸线方向实验变化的影响。我们将T.saltator的样本从两个不同的地点（科尔巴和拉蒂巴）从其原始海滩转移到了熟悉的海滩，并测试了它们在新海滩上的太阳能和景观方向，该方向与前一个方向几乎相反。在家庭海滩和新海滩上进行的结果比较证实了两种人群都使用了太阳罗盘，以及景观和光学局部天空因素在调整逃生方向方面的重要性。在这两个人群中，在新海滩上观察到的散射增加，尤其是当个人可以看到风景时。此外，记录到两个人群之间的行为差​​异也很明显，即在不熟悉的海滩上进行测试时，拉蒂巴族的人没有明显地朝向海岸线，而在新海滩上，科巴族也保持着居家的方向。

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