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DOI10.1016/j.jenvman.2019.04.005
The pros and cons of the invasive freshwater apex predator, European catfish Silurus glanis, and powerful angling technique for its population control
Vejrik, Lukas1,2; Vejrikova, Ivana1; Kocvara, Lubos1; Blabolil, Petr1; Peterka, Jiri1; Sajdlova, Zuzana1; Juza, Tomas1; Smejkal, Marek1; Kolarik, Tomas1; Barton, Daniel1; Kubecka, Jan1; Cech, Martin1
发表日期2019
ISSN0301-4797
EISSN1095-8630
卷号241页码:374-382
英文摘要

Catfish have spread across Europe and several countries out of this region within the last decades. Basic knowledge of this apex predator has revealed concerns of invasive behaviour and questions regarding its utilization as a biomanipulation species. However, a method enabling its regulation to a required level has not yet been developed. We simulated the impact of angling on the catfish population by method of hook-lines in two post-mining lakes with a monitored population consisting of tagged individuals and in two reservoirs as reference sites. Further, the efficiency of hook-lines as a reducing device was examined and the economic aspects were determined. Catfish population in localities where the species is unwanted or invasive may be efficiently reduced to a harmless level by hook-lines and angling (depending on the approach of anglers). The most efficient time of the year seems to be spring to early summer with catch efficiency of 5.4 individuals per 10 baits in one day. The catch efficiency markedly decreased during the second part of the year and did not exceed 2.8 individuals per 10 baits in one day. Mean size of catfish had negative impact whereas catfish biomass had positive impact on the catch efficiency. Trophic status and number of catfish in the locality had no impact on the catch efficiency. According to model, 11-18 bait-days per 1 ha per season is efficient to decrease catfish population to 10% of the original size. Both angling and hook-lines are very simple, they are financially and time bearable mechanisms of catfish regulation in any condition. However, catfish play an important role as a biomanipulative species in many localities. In this case where catfish is beneficial, angling presents a real threat of population collapse and loss of the biomanipulative effect.


WOS研究方向Environmental Sciences & Ecology
来源期刊JOURNAL OF ENVIRONMENTAL MANAGEMENT
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/100142
作者单位1.Czech Acad Sci, Inst Hydrobiol, Biol Ctr, Sadkach 7, Ceske Budejovice 37005, Czech Republic;
2.Univ South Bohemia Ceske Budejovice, Fac Sci, Branisovska 31, Ceske Budejovice 37005, Czech Republic
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Vejrik, Lukas,Vejrikova, Ivana,Kocvara, Lubos,et al. The pros and cons of the invasive freshwater apex predator, European catfish Silurus glanis, and powerful angling technique for its population control[J],2019,241:374-382.
APA Vejrik, Lukas.,Vejrikova, Ivana.,Kocvara, Lubos.,Blabolil, Petr.,Peterka, Jiri.,...&Cech, Martin.(2019).The pros and cons of the invasive freshwater apex predator, European catfish Silurus glanis, and powerful angling technique for its population control.JOURNAL OF ENVIRONMENTAL MANAGEMENT,241,374-382.
MLA Vejrik, Lukas,et al."The pros and cons of the invasive freshwater apex predator, European catfish Silurus glanis, and powerful angling technique for its population control".JOURNAL OF ENVIRONMENTAL MANAGEMENT 241(2019):374-382.
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