Rotational bias in mosquitofish (Gambusia holbrooki): the role of laterality and sun-compass navigation.
Rotational bias in mosquitofish (Gambusia holbrooki): the role of laterality and sun-compass navigation.
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DOI：
10.1080/713754231
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发表时间：
1996-07-01
期刊：
影响因子：
1.4
通讯作者：
Vallortigara, G
中科院分区：
文献类型：
--
作者：
Bisazza, A;Vallortigara, G
研究了蚊虫(Gambusia Holbrooki)游泳时的自发旋转偏好。雌性，但不是雄性，在下午优先逆时针方向在圆形水箱中游泳，而不是在早上。女性的旋转偏好似乎与太阳罗盘定向机制有关，因为在漫反射照明条件下和使用天真的女性(即使用从未暴露在阳光下的个体)时，它们会消失。然而，在反复测试下，太阳罗盘机制产生的偏见趋于消失，但雌性仍然表现出在个体水平上变得稳定和一致的旋转偏好。在重复测试下，男性也表现出一致的个人旋转偏好。结论是，蚊虫的旋转偏向是由两个独立的现象引起的：与捕食强度有关的太阳罗盘导航机制和个体水平的行为偏侧化，这可能反映出运动或感觉系统中的神经不对称。
Spontaneous rotational preferences in swimming of mosquitofish (Gambusia holbrooki) were investigated. Females, but not males, swam in circular tanks preferentially anticlockwise in the afternoon but not in the morning. Females' rotational preferences appeared to be related to a sun-compass orientation mechanism, as they disappeared under diffuse lighting conditions and when using naive females (i.e. using individuals never exposed to sunlight). Under repeated testing, however, the bias produced by the sun-compass mechanism tended to disappear, but females still showed rotational preferences that became stable and consistent at the individual level. Males too showed consistent individual rotational preferences under repeated testing. It is concluded that rotational bias in mosquitofish is due to two independent phenomena: a sun-compass navigation mechanism, which is related to the intensity of predation, and a behavioural lateralisation at the individual level, which is likely to reflect neural asymmetries in motor or sensory systems.