Far field chemo-orientation in the American lobster, Homarus americanus: Effect of unilateral ablation and lesioning of the lateral antennule
Far field chemo-orientation in the American lobster, Homarus americanus: Effect of unilateral ablation and lesioning of the lateral antennule
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DOI：
10.1086/bblv193n2p214
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发表时间：
1997-10-01
影响因子：
1.6
通讯作者：
Atema, J
中科院分区：
文献类型：
--
作者：
Beglane, PF;Grasso, FW;Atema, J
215龙虾被定义为龙虾从庇护所到其上游30厘米位置的路径与从庇护所到源头的直接路径之间的夹角。当刺激注入背景流时，假手术治疗的动物从避难所出现的频率明显低于没有刺激的情况[x2 (1,71)= 13.14；P< 0 . Ol]。在刺激存在的情况下，患病动物离开收容所的频率显著降低[x2 (155)= 29.94；P< 0 . Ol]。消融无显著性差异。在动物离开收容所的试验中，最初的“来源指向”（~ 30”）明显比操作前的试验更频繁[x*(1,20)= 7.32；P < 0.05)。在有刺激的实验中，受损动物的源定向反应数量与假体没有显著差异。然而，在这种情况下，消融组表现出的源导向反应明显少于假体[x2 (1,26)= 5.45， P< 0.021（图1）]。我们的研究结果表明，失去整个触角会干扰美国龙虾定位远场气味源的能力。我们没有发现只在一个侧触角上被剥夺化学感受器的动物的行为有显著差异。这可能表明两个触角上的流动感和一个触角上的化学接受足以实现正常的化学定向。然而，鉴于病变治疗组（有刺激）整体定向反应明显下降，在没有进一步实验的情况下，从阴性结果得出这一结论可能为时过早。
ANIMAL BEHAVIOR 215 the lobster was defined as the angle between the path of the lobster from the shelter to its position 30 cm upstream, and a direct path from the shelter to the source. Sham treated animals emerged from the shelter significantly less often when the stimulus was injected into the background flow than in the absence of a stimulus [x2 (1, 71)= 13.14; P< O. Ol]. Lesioned animals left the shelter significantly less frequently in the presence of the stimulus [x2 (155)= 29.94; P< O. Ol]. Ablates showed no significant differences. In trials where the animals left the shelter, shams were initially “source directed”(~ 30”) significantly more often than in the premanipulation trials [x*(1, 20)= 7.32; P< 0.05]. Lesioned animals did not differ significantly from shams in the number of sourcedirected responses during trials where stimulus was present. Ablates, however, exhibited significantly fewer source-directed responses than shams in this condition [x2 (1, 26)= 5.45, P< 0.021 (Fig. 1).Our results demonstrate that the loss of an entire antennule interferes with the ability of American lobsters to orient to a far field odor source. We did not find a significant difference in the behavior of animals deprived of only chemoreceptors on one lateral antennule. This may suggest that a sense of flow on both antennules and chemoreception on one is sufficient for normal chemo-orientation. However, in view of the significant depression of overall orientation responses in the lesion treatment group (with stimulus), it may be premature to draw this conclusion from a negative result without further experimentation.