method of tracking released fish has the potential to provide useful information on
the effects of releases from cultured fisheries industry.
5.6.9 Future Tasks
Natural fishery resources have been declining from year to year due to environmental destruction and overfishing. Meanwhile, expectations for fishery production
as a protein source continue to grow. Under these conditions, the need to preserve
genetic diversity is likely to only grow. It is therefore essential to quickly provide
data to serve as a standard for future preservation of wild populations in rivers,
lakes, and various marine ecosystems, including estuaries, intertidal zones, and
shallow and deep ocean waters.
Monitoring systems using genetic markers must be introduced in farming
(brackish water) to preserve and manage improved lines and in aquiculture to
prevent unintended genetic changes from arising in the artificial seedling production
process.
More and more species are becoming increasing rare or threatened with
extinction. This extinction may be hastened if fish are collected and killed to
determine the current state of their genetic diversity. Avoiding the sacrifice of these
fish will request detection of genetic markers using only small samples.
For populations that have already died out, considered should be given to the
question of whether it would suffice to transplant some organisms from a surviving
population to restore the local population, and to designing guidelines for founding
populations. The need for genetic research to restore such environments (ecosystems) is likely to only grow.
None of these tasks can be carried out with DNA polymorphs and other genetic
markers. Continued research in the development and simplification of genetic
marker detection technology will be needed in the days ahead.
5.7 New Marine Breeding with DNA Markers
As rapid advances continue to be made in studies of genome information for human
beings and many other organisms, new information is being amassed on genetic
information, or the structure and functions of the genome at the molecular level.
Developments in marine farming technology have enabled quantitative production of many marine creatures, including the salmon, trout, olive flounder, red
seabream, and kuruma prawn. As quantitative production technologies have
enabled mass production, efforts are now under way to achieve qualitative
improvements, or improvements to economic properties in terms of disease resistance, high growth, and meat quality. While active breeding of cattle, horses, swine,
and chickens has resulted in the development of multiple new varieties over the
centuries, successes with improvements in farmed fish varieties that have recently
5.6 Research Applying DNA Markers
133
the effects of releases from cultured fisheries industry.
5.6.9 Future Tasks
Natural fishery resources have been declining from year to year due to environmental destruction and overfishing. Meanwhile, expectations for fishery production
as a protein source continue to grow. Under these conditions, the need to preserve
genetic diversity is likely to only grow. It is therefore essential to quickly provide
data to serve as a standard for future preservation of wild populations in rivers,
lakes, and various marine ecosystems, including estuaries, intertidal zones, and
shallow and deep ocean waters.
Monitoring systems using genetic markers must be introduced in farming
(brackish water) to preserve and manage improved lines and in aquiculture to
prevent unintended genetic changes from arising in the artificial seedling production
process.
More and more species are becoming increasing rare or threatened with
extinction. This extinction may be hastened if fish are collected and killed to
determine the current state of their genetic diversity. Avoiding the sacrifice of these
fish will request detection of genetic markers using only small samples.
For populations that have already died out, considered should be given to the
question of whether it would suffice to transplant some organisms from a surviving
population to restore the local population, and to designing guidelines for founding
populations. The need for genetic research to restore such environments (ecosystems) is likely to only grow.
None of these tasks can be carried out with DNA polymorphs and other genetic
markers. Continued research in the development and simplification of genetic
marker detection technology will be needed in the days ahead.
5.7 New Marine Breeding with DNA Markers
As rapid advances continue to be made in studies of genome information for human
beings and many other organisms, new information is being amassed on genetic
information, or the structure and functions of the genome at the molecular level.
Developments in marine farming technology have enabled quantitative production of many marine creatures, including the salmon, trout, olive flounder, red
seabream, and kuruma prawn. As quantitative production technologies have
enabled mass production, efforts are now under way to achieve qualitative
improvements, or improvements to economic properties in terms of disease resistance, high growth, and meat quality. While active breeding of cattle, horses, swine,
and chickens has resulted in the development of multiple new varieties over the
centuries, successes with improvements in farmed fish varieties that have recently
5.6 Research Applying DNA Markers
133