Fishing nets - Passive fishing gear

Fish traps

Principles of fish trap

Our standard range of fi sh traps includes several tested types with a broad scale of chambers ranging from 0.1 to 100 m3.

Traps use for scientific sampling and fisheries

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prof. RNDr. Jan Kubečka, CSc.
prof. RNDr. Jan Kubečka, CSc. My scientifi career is associated with the Institute of hydrobiology of the Academy of Sciences CR and focuses on research into the ecological role of fish community in reservoirs and lakes. I participated in methodological development of many fishing techniques and gears, which are useful in large water ecosystems – beach seine nets, gillnets, trawls, purse seine nets, fish traps, scientific echosounders, usage of electrofi shing etc.

Technical improvements were tested many times in the Czech Republic as well as abroad Thanks to the 30-year development of sampling methodologies, it is nowadays possible to achieve a quite accurate quantitative picture of composition and distribution of fi sh communities, when robust methods such as multimesh gillnets, trawls and beach seine nets are used correctly. The unfortunate and sad result of this sampling is its effect on fi sh life and the frequent mortality of captured fi sh. This is one of the reasons why a substantial part of my scientific career is dedicated to the development of indirect fi sh study, particularly the use of scientific echosounders.

Fish traps are quite a gentle way to sample fish

First, I worked with fi sh traps during my diploma thesis at the Faculty of Science, Charles University in Prague, which dealt with fi sh fry communities in the Klíčava Reservoir. Klíčava traps were specially developed for this reservoir and were effective especially for sampling perch (Kubečka & Švátora 1993). When I started to work at the Institute of Hydrobiology of the Academy of Sciences CR, I developed larger fi sh traps together with a net builder named František Hamr. These fish traps were then used for mark-recapture studies and biomanipulation purposes. They were named after the main locality of usage – medium trap. They have been used in a nearly unchanged design for almost 30 years.

An ambitious project was completed at the turn of the 20th century

The importance of tributary zone for fi sh community of the reservoir was studied in cooperation with Pokorný – Sítě company. We developed two specially designed giant traps which were able to examine whole fish migration between the Římov Reservoir and its main tributary, the Malše River (Hladík et al. 2002). These two traps were installed during migration period for four years and their use enriched our knowledge about migration of fi sh between reservoir and river (Hladík & Kubečka 2003, 2004, Hladík et al. 2008, Říha et al. 2013).

Klíčava traps, standard Římov traps and modifi ed Římov traps with heart have recently been used in sampling of fi sh communities in Římov Reservoir and post-mining lake Milada (Říha & Kočvara, personal communication; Peterka et al. 2012).



  • Hladík, M., Kubečka, J., Pokorný P., Čech M., Draštík, V., Kratochvíl, M., Peterka, J., Prchalová, M., Vašek, M., 2002: Giant traps for fishing in the inflow zone of the Římov Reservoir. In: Spurný, P. (ed.) The 5th Czech conference of Ichthyology, Proceedings of the international conference: 126-131
  • Hladík, M., Kubečka, J., 2003: Fish migration between the reservoir and its main tributary. Hydrobiologia 504: 251-266.
  • Hladík, M., Kubečka, J., 2004. The effect of the water level fluctuation on tributary spawning migration of reservoir fish. Ecohydrology and Hydrobiology, 4: 449-457.
  • Hladík, M., Kubecka, J., Mrkvička, T., Čech, T., Draštík, V., Frouzová, J., Hohausová, E., Matěna, J., Matěnová, V., Kratochvíl, M., Peterka, J., Prchalová, M., Vašek, M., 2008: The effect of the construction of a reservoir on the fish assemblage in an inflow river. Czech J. Anim. Sci., 53, 12: 537-547.
  • Kubecka, J., 1992: Fluctuations in fyke-net catches during the spawning period of the Eurasian perch {Perca fluviatilis} in the Římov Reservoir, Czechoslovakia. Fisheries Research, 15: 157-167
  • Kubečka, J. and Švátora, M.,1993: Abundance estimates of perch fry {Perca fluviatilis} complicated by grouped behaviour. Ecology of Freshwater fish, 2: 84-90.
  • Peterka, J., Adámek, Z., Blabolil, P., Bouše, E., Čech, M., Draštík, V., Frouzová, J., Havel, L., Hohausová, E., Jankovský, M., Jarolím, O., Jurajda, P., Jůza, T., Kočvara, L., Kratochvíl, M., Kubečka, J., Muška, M., Prchalová, M., Richta, J., Říha, M., Sajdlová, Z., Soukalová, K., Tušer, M., Uhlířová, A., Uhlíř, F., Vašek, M., Vejřík, L., Veselý, L., Vlasák, P., 2012: Ryby nádrže Milada. str. 92-111 In: Šutera V. a kolektiv (eds.), 2012. Příroda nádrže Milada - území po zatopení lomu Chabařovice. Lesnická práce, s. r. o., Kostelec n. Č.L., 207 str. ISBN 978-80-7458-024-6.
  • Říha, M., Hladík, M., Mrkvička, T., Prchalová, M., Čech, M., Draštík, V., Frouzová, J., Jůza, T., Kratochvíl, M., Peterka, J., Vašek M., Kubečka J., 2013: Post-spawning dispersal of tributary spawning fish species to a reservoir system. Folia Zoologica 62 (1): 1–13.

Klicava trap

Klicava trap was originally developed for perch sampling in the Klicava and Záskalská Reservoirs. Traps were successfully used for biomanipulation in Římov Reservoir (Kubečka, 1992).


Instructions for use

Klicava trap is made in time-t tested design and sizes
MESH SIZE (in mm)WIDTH (in cm)HEIGHT (in cm)BODY LENGTH (in cm)WING LENGTH (in cm)
6, 10, 1540408080
6, 10, 15404080120

Keep in mind the following ethical standard - a fish trap lost is still fishing

Rimov trap

Used on many occasions in large water bodies in the Czech Republic as the main tool for biomanipulation with perch (Kubečka 1992, Seďa & Kubečka, 1997)


Underestimation was solved by adding another nozzle to the Rimov trap.


Rimov trap is made in standard design a and its modififi cations.

15, 200.4 x 0.4 m / 5 – Square-shaped25 - 10 m2
15, 200.4 m / 5 – Ring-shaped25 - 10 m2
15, 200.6 m / 5 – Ring-shaped25 - 10 m2
15, 200.7 m / 5 – Ring-shaped25 - 10 m2
15, 200.9 m / 5 – Ring-shaped210 m2

Rimov trap with heart

It is a modifi cation of the Rimov trap. A larger nozzle was added in front of the heart, which forms the fi rst part of the trap body.


Rimov trap with heart is made in a time-tested design and size

15, 201.2 m / 3 ks 0.9 m
/ 5 pieces
1.2 m / 3 pieces
0.9 m / 5 pieces
35 - 12 m2
Instructions for use:

General principles

Only a correctly set fish trap catches fish!

Rimov tributary trap

Tributary trap was used for monitoring fi sh migration between the Římov Reservoir and its main tributary – Malše River.

Two fish traps were installed close to each other in the tributary of the reservoir.




Trap was supported with a metal self-supporting frame, which was used to:

Fish caught were removed twice a week or more frequently into a floating cage and then scientifically processed.

Tributary fish traps capture all kinds of migrating fish (Hladík et al. 2002).

Mark and recapture of fish using Rimov tributary traps belongs to the largest marking experiments in history of the Czech ichthyologic.

Rimov tributary traps can be used for biomanipulation with purposes.