陷阱和网,一起比单独好:一种改进克氏原螯虾管理的创新方法

IF 1.6 3区 环境科学与生态学 Q3 FISHERIES Knowledge and Management of Aquatic Ecosystems Pub Date : 2020-01-01 DOI:10.1051/kmae/2020031
J. García‐de‐Lomas, Elías D. Dana, R. González
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引用次数: 3

摘要

红色沼泽小龙虾克氏原螯虾是欧洲最广泛的入侵小龙虾,对水生生态系统造成了过多的负面影响。大多数用于控制小龙虾种群的捕获方法都倾向于捕获成年小龙虾,然而,去除年轻的小龙虾(YOY)可能是有效控制入侵种群的必要条件。本文分析了在西班牙南部五个永久溪流池进行的管理运动中捕获的小龙虾。我们比较了两种控制方法获得的大小结构、CPUE和性别比:圆柱形捕虾器(一种常用的小龙虾管理方法)和细网水平捕虾器(灵感来自浮游动物取样技术)。水平牵引法捕获yy的选择性和效率均高于诱捕法(8倍)。两种齿轮的联合使用使总渔获量增加了46%。我们的结果表明,如果只使用圆柱形陷阱,则YOY可能会被严重低估。在管理活动期间,同比种群占总捕获量的60%。因此,采用细网主动网法对克氏弧菌入侵种群进行管理是一种有效的补充方法,可以更好地了解入侵小龙虾种群的结构和动态。
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Traps and netting, better together than alone: an innovative approach to improve Procambarus clarkii management
The red swamp crayfish Procambarus clarkii is the most widespread invasive crayfish in Europe, and responsible for a plethora of negative impacts on aquatic ecosystems. Most capture methods used for controlling crayfish populations have a bias towards the capture of adults, however, the removal of the young-of-the-year crayfish (YOY) may be essential for achieving effective control of invasive populations. This paper analysed the crayfish caught during a management campaign carried out in five permanent stream pools from southern Spain. We compared size structure, CPUE and sex-ratio obtained with two control methods: cylindrical traps (a method commonly used in crayfish management) and horizontal hauls using a fine-mesh net (inspired by zooplankton sampling techniques). Horizontal hauls showed a higher selectivity for catching YOY and higher efficiency (eight-fold) than traps. The combined use of both gears increased total catch by 46%. Our results suggest that YOY may be sharply underestimated if only cylindrical traps are used. The YOY cohort represented 60% of the total catch during the management campaign. Therefore, active netting with a fine mesh may be a complementary method to the use of traps in order to manage invasive populations of P. clarkii and may provide a better understanding of the structure and dynamics of invasive crayfish populations.
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来源期刊
Knowledge and Management of Aquatic Ecosystems
Knowledge and Management of Aquatic Ecosystems 环境科学-海洋与淡水生物学
CiteScore
3.70
自引率
5.60%
发文量
22
审稿时长
>12 weeks
期刊介绍: Knowledge and Management of Aquatic Ecosystems (KMAE-Bulletin Français de la Pêche et de la Pisciculture since 1928) serves as a foundation for scientific advice across the broad spectrum of management and conservation issues related to freshwater ecosystems. The journal publishes articles, short communications, reviews, comments and replies that contribute to a scientific understanding of freshwater ecosystems and the impact of human activities upon these systems. Its scope includes economic, social, and public administration studies, in so far as they are directly concerned with the management of freshwater ecosystems (e.g. European Water Framework Directive, USA Clean Water Act, Canadian Water Quality Guidelines, …) and prove of general interest to freshwater specialists. Papers on insular freshwater ecosystems and on transitional waters are welcome. KMAE is not a preferred journal for taxonomical, physiological, biological, toxicological studies, unless a clear link to ecological aspects can be established. Articles with a very descriptive content can be accepted if they are part of a broader ecological context.
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