Brown and black bullheads: Netting

How is the evidence assessed?
  • Effectiveness
    55%
  • Certainty
    55%
  • Harms
    not assessed

Source countries

Key messages

  • A replicated study from 1999-2000 in shallow interconnected ponds in a nature reserve in Belgium1 found that double fyke nets could be used to significantly reduce the population of brown bullhead measuring over 8cm

 

About key messages

Key messages provide a descriptive index to studies we have found that test this intervention.

Studies are not directly comparable or of equal value. When making decisions based on this evidence, you should consider factors such as study size, study design, reported metrics and relevance of the study to your situation, rather than simply counting the number of studies that support a particular interpretation.

Supporting evidence from individual studies

  1. A replicated study from 1999-2000 conducted in small, shallow, interconnected ponds in a nature reserve in Belgium (Louette G. & Declerk S. 2006) found that double fyke nets were an effective tool to significantly reduce the population of brown bullhead Ameiurus nebulosus.  In ponds smaller than 1.5 hectares, a set of 12-16 double fyke nets caught an average of 66% (maximum 80%) of all brown bullhead measuring over 8 cm within one to two days. Capture rates were lower in a larger pond of three hectares. Mean depth of the ponds was 1.5 meters. The fyke nets consisted of two conically shaped nets connected by a vertically hanging net (11 x 1 m). Each fyke net had a total length of 8 m and mesh size of 8 mm. Trapped fish within the nets were counted and measured over one to two days.

    Study and other actions tested
Please cite as:

Aldridge, D., Ockendon, N., Rocha, R., Smith, R.K. & Sutherland, W.J. (2019) Some aspects of control of freshwater invasive species. Pages 569-602 in: W.J. Sutherland, L.V. Dicks, N. Ockendon, S.O. Petrovan & R.K. Smith (eds) What Works in Conservation 2019. Open Book Publishers, Cambridge, UK.

Where has this evidence come from?

List of journals searched by synopsis

All the journals searched for all synopses

Control of Freshwater Invasive Species

This Action forms part of the Action Synopsis:

Control of Freshwater Invasive Species
Control of Freshwater Invasive Species

Control of Freshwater Invasive Species - Published 2017

Control of Freshwater Invasive Species Synopsis

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What Works in Conservation provides expert assessments of the effectiveness of actions, based on summarised evidence, in synopses. Subjects covered so far include amphibians, birds, terrestrial mammals, forests, peatland and control of freshwater invasive species. More are in progress.

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