کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4544948 1327219 2006 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The importance of identifying spatial population structure in restocking and stock enhancement programmes
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم آبزیان
پیش نمایش صفحه اول مقاله
The importance of identifying spatial population structure in restocking and stock enhancement programmes
چکیده انگلیسی

Most animal species show detectable genetic differentiation between populations, but the extent and pattern of this differentiation varies considerably between species. Some show gradual differentiation due to isolation by distance, some show chaotic patchiness, and some show relative uniformity over large distances with striking discontinuities over short distances. These varying patterns reflect both the dispersal powers of the organism and its population history. The evolution of locally adapted genotypes is facilitated in populations with restricted gene flow, and such co-adapted genotypes may then vary from population to population depending on local selective forces. Restocking and stock enhancement programmes need to be aware of the stock structure of the target species, as the introduction of genotypes unrepresentative of the augmented population can have negative effects. Swamping the native population with large numbers of genotypes from a few matings, even if derived from the native population, can also be detrimental. It follows that, wherever possible, restocking and stock enhancement programmes should use broodstock taken directly from the population to be enhanced, and that large numbers of broodstock should be used. If broodstock cannot be taken from the population to be enhanced, they should be taken from the genetically most similar population available. Restocking and stock enhancement programmes should be genetically monitored to determine their impacts and outcomes.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fisheries Research - Volume 80, Issue 1, August 2006, Pages 9–18
نویسندگان
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