墨西哥豹纹蛙幼体(Lithobates spectabilis)对引入的虹鳟鱼的反应

IF 2.5 3区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES Aquatic Conservation-Marine and Freshwater Ecosystems Pub Date : 2024-09-22 DOI:10.1002/aqc.4254
Carlos A. Flores, Michael R. Crossland, Medardo Arreortúa, Edna González-Bernal
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引用次数: 0

摘要

引入外来鱼类进行水产养殖会严重影响本地水生动物,尤其是在本地两栖动物具有双相生命周期的地区。我们进行了三项实验室实验,以评估墨西哥引进的虹鳟鱼(Oncorhynchus mykiss)水产养殖对本地豹纹蛙(Lithobates spectabilis)的影响。我们旨在了解鳟鱼视觉和化学线索对蝌蚪行为的影响,以及化学线索(与蝌蚪密度相互作用)对蝌蚪生长、发育和存活的长期影响。在实验 1 中,我们让各组蝌蚪接触鳟鱼的视觉线索,并将它们在水箱中的避难所使用情况和位置与对照组进行比较。在实验 2 中,我们让各组蝌蚪接触鳟鱼的化学线索,将它们对避难所的使用情况与对照组进行对比。在实验 3 中,我们将不同密度的蝌蚪长期暴露在鳟鱼化学线索下,记录它们的生长、发育和存活情况。结果表明,与对照组相比,蝌蚪对鳟鱼视觉线索的反应并没有改变对避难所的使用,但却将自己置于离这些线索更远的地方。蝌蚪对化学线索的反应增加了对避难所的使用。长期接触化学线索不会影响蝌蚪的生长、发育或存活,但密度越高,存活率越低。我们的研究结果表明,通过鱼类逃逸或未经处理的含有鳟鱼化学线索的养殖水排放,鳟鱼养殖可能会引发眼镜蟾蜍幼虫的行为反应,增加对避难所的使用和当地蝌蚪密度,最终影响它们的生存,并可能影响物种的持久性。
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Responses of Showy Leopard Frog Larvae (Lithobates spectabilis) to the Presence of Introduced Rainbow Trout in Mexico

The introduction of invasive fish for aquaculture can significantly impact native aquatic fauna, especially in regions where native amphibians have a biphasic life cycle. We conducted three laboratory experiments to assess the effects of introduced rainbow trout (Oncorhynchus mykiss) aquaculture on the native showy leopard frog (Lithobates spectabilis) in Mexico. We aimed to understand the effects of trout visual and chemical cues on tadpole behaviour, and the long-term effects of chemical cues (in interaction with tadpole density) on tadpole growth, development and survival. In Experiment 1, we exposed groups of tadpoles to the visual cue of a trout, comparing their refuge use and position within the tank to a control group. In Experiment 2,we exposed groups of tadpoles to trout chemical cues contrasting their refuge use to a control group. In Experiment 3, we exposed tadpoles at different densities to trout chemical cues for a prolonged period, recording their growth, development and survival. Results showed that tadpoles did not alter refuge use in response to trout visual cues but positioned themselves farther from these cues compared to controls. Tadpoles increased refuge use in response to chemical cues. Long-term exposure to chemical cues did not affect tadpole growth, development or survival, but higher densities led to lower survival rates. Our findings suggest that trout farming, through fish escapement or untreated farm water discharge containing trout chemical cues, could trigger behavioural responses in L. spectabilis larvae, increasing refuge use and local tadpole densities, ultimately compromising their survival and, potentially, species persistence.

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来源期刊
Aquatic Conservation-Marine and Freshwater Ecosystems
Aquatic Conservation-Marine and Freshwater Ecosystems 环境科学-海洋与淡水生物学
CiteScore
5.50
自引率
4.20%
发文量
143
审稿时长
18-36 weeks
期刊介绍: Aquatic Conservation: Marine and Freshwater Ecosystems is an international journal dedicated to publishing original papers that relate specifically to freshwater, brackish or marine habitats and encouraging work that spans these ecosystems. This journal provides a forum in which all aspects of the conservation of aquatic biological resources can be presented and discussed, enabling greater cooperation and efficiency in solving problems in aquatic resource conservation.
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