Distribution in the estuary and salinity tolerance of armored catfish (Loricariidae) in Central Vietnam

IF 2.2 3区 环境科学与生态学 Q2 ECOLOGY
Efim D. Pavlov, Tran Duc Dien, Ekaterina V. Ganzha
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引用次数: 0

Abstract

In the last decade, invasive suckermouth armored catfish Pterygoplichthys spp. spread among many river systems of Vietnam. Extended distribution of armored catfish might be associated with using brackish water in estuaries for fish spread from one river system to another. The first goal of our study was to assess the occurrence of armored catfish in the estuary of the Da Rang River (Phu Yen Province, Vietnam) and their distribution depending on the horizontal salinity gradient (4–25 PSU). Fish were mainly caught by stationary bottom traps in water salinity from 4 PSU to 18 PSU. The second goal of our study was to experimentally evaluate the ability of armored catfish to move and breathe in seawater (33 PSU). Fish moved in horizontal and vertical planes after transfer into seawater during the first 15 minutes. Fish moved around less by the 13 th –15 th minutes in seawater. Armored catfish moved around more in seawater than in freshwater. The exposure to seawater for 6 minutes led to deterioration of fish breathing. The results of our field and experimental studies established that armored catfish are found and able to move in brackish waters but avoid high salinity water. These facts provide support for the hypothesis of armored catfish invasion through the estuaries and coastlines.
Distribution在越南中部河口及甲鱼的耐盐性
在过去的十年中,入侵的吸盘甲鲶鱼Pterygoplichthys spp.在越南的许多河流系统中传播。甲鱼的扩展分布可能与利用河口的微咸水使鱼类从一个河流系统传播到另一个河流系统有关。本研究的第一个目标是评估越南富颜省大让河河口甲鲶鱼的发生情况及其随水平盐度梯度(4-25 PSU)的分布。在盐度为4psu ~ 18psu的水域,主要采用固定式底网捕鱼。我们研究的第二个目标是通过实验评估盔甲鲶鱼在海水中移动和呼吸的能力(33 PSU)。鱼在被转移到海水中后的前15分钟内在水平和垂直平面上移动。鱼在海水中游动的时间在第13 -15分钟减少了。盔甲鲶鱼在海水中比在淡水中游动得更多。暴露在海水中6分钟导致鱼类呼吸恶化。我们的实地和实验研究结果表明,盔甲鲶鱼能够在微咸水域中发现并移动,但避免高盐度的水。这些事实为甲鱼通过河口和海岸线入侵的假设提供了支持。
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来源期刊
Aquatic Invasions
Aquatic Invasions ECOLOGY-MARINE & FRESHWATER BIOLOGY
CiteScore
4.30
自引率
0.00%
发文量
20
审稿时长
6-12 weeks
期刊介绍: Aquatic Invasions is an open access, peer-reviewed international journal focusing on academic research of biological invasions in both inland and coastal water ecosystems from around the world. It was established in 2006 as initiative of the International Society of Limnology (SIL) Working Group on Aquatic Invasive Species (WGAIS) with start-up funding from the European Commission Sixth Framework Programme for Research and Technological Development Integrated Project ALARM. Aquatic Invasions is an official journal of International Association for Open Knowledge on Invasive Alien Species (INVASIVESNET). Aquatic Invasions provides a forum for professionals involved in research of aquatic non-native species, including a focus on the following: • Patterns of non-native species dispersal, including range extensions with global change • Trends in new introductions and establishment of non-native species • Population dynamics of non-native species • Ecological and evolutionary impacts of non-native species • Behaviour of invasive and associated native species in invaded areas • Prediction of new invasions • Advances in non-native species identification and taxonomy
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