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In this comprehensive edited book, international experts in
fisheries management and ecology review and appraise the status of
lake and reservoir fisheries, assessment of fisheries yields,
trophic ecology, rehabilitation and conservation, including a
special section on African lakes where so much information of huge
relevance to fisheries managers is now available.
Contributions from around the world.
Carefully edited by internationally respected editor.
Has been generated from acclaimed HIFI Symposium.
As in the terrestrial environment, most data collection from
freshwater habitats to date falls into the survey, surveillance or
research categories. The critical difference between these
exercises and a monitoring project is that a monitoring project
will clearly identify when we need to make a management response. A
Model for Conservation Management and Monitoring Monitoring (as
defined by Hellawell) is essentially a tool of practical
conservation management, and Fig. 1.1 shows a simple, but
effective, model for nature conser- tion management and monitoring.
The need for clear decision-making is implicit in this model. First
we must decide what would represent a favourable state for the key
habitat or species, and then we must decide when to intervene if
the state is (or becomes) unfavourable. A third, often overlooked,
but equally important, decision concerns when we would consider the
habitat or species to have recovered; this is unlikely to be the
same point that we became concerned about it. This decision not
only has resource imp- cations, it can also have major implications
for other habitats and species (prey species are an obvious
example). All of these decisions are essential to the devel- ment
of an efficient and effective monitoring project.
As in the terrestrial environment, most data collection from
freshwater habitats to date falls into the survey, surveillance or
research categories. The critical difference between these
exercises and a monitoring project is that a monitoring project
will clearly identify when we need to make a management response. A
Model for Conservation Management and Monitoring Monitoring (as
defined by Hellawell) is essentially a tool of practical
conservation management, and Fig. 1.1 shows a simple, but
effective, model for nature conser- tion management and monitoring.
The need for clear decision-making is implicit in this model. First
we must decide what would represent a favourable state for the key
habitat or species, and then we must decide when to intervene if
the state is (or becomes) unfavourable. A third, often overlooked,
but equally important, decision concerns when we would consider the
habitat or species to have recovered; this is unlikely to be the
same point that we became concerned about it. This decision not
only has resource imp- cations, it can also have major implications
for other habitats and species (prey species are an obvious
example). All of these decisions are essential to the devel- ment
of an efficient and effective monitoring project.
In this edited work, international experts in fisheries management
and ecology review and appraise the status of river fisheries,
assessment methodology, constraints on development, issues and
options regarding management and associated problems in both
temperate and tropical countries. Recommendations are made to
improve management and an attempt is made to provide guidelines for
formulating policy, for planning methodology and for evaluating
future activities.
Assessment of fish community structure and dynamics.
Factors constraining stock recruitment.
Fish habitat requirements.
Instream flow needs.
Impact of water resource schemes.
Rehabilitation of river fisheries.
Enhancement of fish stocks.
Exploitation of stocks.
Management of migratory fish stocks.
Conservation of endangered species.
Integrated river management.
Bioeconomic issues.
Legislation.
Multinational management of rivers.
Case studies.
Based on an international symposium and workshop hosted by the
University of Hull International Fisheries Institute, this new
reference includes expert reviews of the advantages and
shortcomings of all current techniques and management strategies
used in assessment of freshwater fish stocks worldwide. In addition
to the core reports, overview papers present a summary of the
current status of our knowledge in each of the major subject areas,
with a final chapter appraising present and future perspectives on
the concept of stock assessment. All contributions are fully
illustrated and referenced.
Stock Assessment in Inland Fisheries is likely to become the
international, standard reference for all fisheries
departments--offering a single source of contemporary and
definitive information. Moreover, it is also intended to serve as a
course text for students learning about freshwater-fisheries
management.
The interactions between wild bird populations (many protected by
law) and fish, particularly those under commercial culture or part
of a fishery is subject of much controversy. Ecological,
environmental and conservation pressures run alongside commercial
pressures on exploited fish populations. This exciting book draws
together contributions from all over the world to provide a
fascinating insight into many case studies and conflicts in managed
situations as well as looking at the overall ecology of such
interactions in normal un-managed ecosystems.
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