Overview
EnhanceFish
is a decision support tool for the quantitative assessment of aquaculture-based fisheries enhancements. It can be used for example to:
-
Evaluate whether releases of hatchery fish are likely to increase yields in a fishery for which enhancement has been proposed
-
Assess the likely impacts of releases on the wild stock of the target species (where one exists)
-
Analyse data from release experiments to estimate population parameters
-
Identify optimal release and harvesting regimes
The
EnhanceFish
toolkit has three components:
(1) The
EnhanceFish
tool, a software package. It contains a mathematical population model for enhanced fisheries and is used to carry out the quantitative analyses. Underlying
EnhanceFish
is an extended dynamic pool fisheries model with explicit representation of size-dependent mortality, density-dependence in the recruited phase, and differences in population parameters of wild and stocked population components.
EnhanceFish
provides empirical distributions of key parameters to allow prognostic evaluations, and conduct risk assessments. For more information on the scientific basis of
EnhanceFish
see the key reference below.
(2) The
EnhanceFish
manual, which explains the principles underlying the
EnhanceFish
model and assessment methods. It also provides guidance on the practical use of the tool, including worked examples.
(3) The
EnhanceFish
guide, which provides guidance on how to link the quantitative analyses supported by
EnhanceFish
to management and development of enhancements.
EnhanceFish
is designed for use by fisheries and other natural resources professionals including for example government officers, NGO staff or development consultants. Use of EnhanceFish requires understanding of basic concepts of fisheries stock assessment. It does not require specialist knowledge or mathematical skills.
Enhance Fish
Project Brief
(0.2 MB PDF)
STREAM
Enhance Fish
Policy Brief
(0.1 MB PDF)
EnhanceFish
Beta release
The
EnhanceFish
toolkit is now publicly available as a
Beta release
for user testing. This means that you are welcome to test the software and associated documentation, but you should be aware that the software may have bugs and is not guaranteed to work correctly in all situations. Your feedback on any bugs or other problems you may encounter is important to us, as it will help us to improve the software for the first definitive release.
EnhanceFish
SOFTWARE DOWNLOAD
(5 MB ZIP)
Documentation
EnhanceFish
Manual
(4 MB PDF)
EnhanceFish
Guide
(1 MB PDF)
The following documents are frequently updated during Beta testing
EnhanceFish
Known Problems
(0.1 MB PDF)
EnhanceFish
Frequently Asked Questions
(0.1 MB PDF)
EnhanceFish
support
Please report any problems you encounter using
EnhanceFish
Beta to our dedicated email help:
[email protected]
Who is behind
EnhanceFish
?
EnhanceFish
has been developed by
Kai Lorenzen
and Paul Medley. Kai Lorenzen has carried out much of the research on population dynamics of enhancements that underlies
EnhanceFish
(see below for a key reference). Paul Medley has developed and programmed the
EnhanceFish
software.
The development of
EnhanceFish
has been supported by the UK Department for International Development (DFID), Fisheries Management Science Programme. For more information on other outputs of the DFID Fisheries Management Science Programme please visit
www.fmsp.org.uk
.
Key reference
More information on the scientific basis of
EnhanceFish
can be found in:
Lorenzen, K. (2005) Population dynamics and potential of fisheries stock enhancement: practical theory for assessment and policy analysis.
Philosophical Transactions of the Royal Society of London, Series B
260: 171-189.
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