Laterality洞穴鱼:墨西哥Astyanax的左或右觅食行为

IF 1.5 3区 生物学 Q2 ZOOLOGY
L. Espinasa, R. Diamant, Marylena Mesquita, J. Lindquist, Adrianna M. Powers, James Helmreich
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引用次数: 3

摘要

觅食行为的进化是在洞穴黑暗环境等具有挑战性的栖息地定居的关键。振动吸引行为(VAB)使鱼类能够在黑暗中向许多猎物甲壳类动物和昆虫产生的振动刺激游动。VAB是在墨西哥的一个名叫Astyanax mexicanus的失明洞穴中进化而来的。VAB受到越来越多的机械感觉神经移植的调节,尤其是在眼眶区域。然而,Astyanax的VAB仅与左侧神经瘤的数量相关。Astyanax也有一个优先向左侧弯曲的头骨和一个右侧数量神经瘤的QTL信号。我们对五个不同的洞穴种群进行了为期四年的实地研究。结果支持,所有洞穴种群都可以表现出行为偏侧或侧边优势来检查振动物体。支持一方的个人的百分比可能会随着资金池和年份的变化而变化。在一个洞穴种群(Pachón)中,在一年的时间里,这种“利手性”是通过优先使用他们的右侧脸来表达的。相反,在大多数年份和水池中,Tinaja、Sabinos、Molino和Toro洞穴种群优先使用其左侧进行探索。这表明,如果存在适应效应,它会选择自身的不对称性,而不一定是哪一边是专门化的。结果还表明,偏侧性取决于个体鱼类的反应程度,可能是由于其营养、动机状态或当时与鱼类最相关的刺激模式。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Laterality in cavefish: Left or right foraging behavior in Astyanax mexicanus
The evolution of foraging behaviors is key to colonizing challenging habitats such as a cave’s dark environment. Vibration attraction behavior (VAB) gives fish the ability to swim in the darkness toward a vibration stimulus produced by many prey crustaceans and insects. VAB evolved in the blind Mexican cave tetra, Astyanax mexicanus. VAB is regulated by an increased number of mechanosensory neuromasts, particularly in the eye orbital region. However, VAB in Astyanax is only correlated with the number of neuromasts on the left side. Astyanax also have a bent skull preferentially to the left and a QTL signal for the right-side number of neuromasts. We conducted field studies in five different cave populations for four years. Results support that all cave populations can express behavioral lateralization or preponderance of side to examine a vibrating object. The percentage of individuals favoring one side may change among pools and years. In one cave population (Pachón), for one year, this “handedness” was expressed by preferentially using the right side of their face. On the contrary, in most years and pools, Tinaja, Sabinos, Molino, and Toro cave populations explored preferentially using their left side. This suggests that if there is an adaptative effect, it selects for asymmetry on itself, and not necessarily for which side is the one to be specialized. Results also showed that the laterality varied depending on how responsive an individual fish was, perhaps due to its nutritional, motivational state, or mode of stimuli most relevant at the time for the fish.
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来源期刊
CiteScore
2.50
自引率
18.20%
发文量
28
审稿时长
6 weeks
期刊介绍: Subterranean Biology is an international journal published by Pensoft on behalf of the International Society for Subterranean Biology [SIBIOS-ISSB] for the publication of original and significant contributions on all aspects of subterranean life. The Journal will consider original scientific papers dealing with any aspect of subterranean ecosystems and their components focusing on biology, ecology, evolution and conservation. Reviews and Commentaries: The journal welcomes review articles on aspects of subterranean biology. They should be submitted in the same way as research articles but use a simple layout with no more than three levels of headings. Commentaries on previous matter published in the journal may be also considered. Both reviews and commentaries will be reviewed. Book Reviews: Reviews of books, symposia volumes and conferences pertinent to the journal are welcome. The journal publishes electronic versions of the articles when these are ready to publish, without delays that might be caused by completion of an issue. These electronic versions are not "pre-prints" but final and immutable (Version of Record), hence available for the purposes of biological nomenclature. The date indicated on the electronic version is to be considered the actual publication date.
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