New data on sterlet (Acipenser ruthenus L.) genetic diversity in the middle and lower Danube sections, based on mitochondrial DNA analyses
2015
Тип документа:
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт:
Poor regulated fishery, pollution, fragmentation and loss of habitat are
most important factors influencing decline of sterlet population
worldwide. In Middle and Lower Danube region, this species still have
significant economic importance since wilde populations are commercially
exploited, while Upper Danube populations are dependent on stocking
efforts in order to maintain their presence in open waters. Aim of
present study is to analyze genetic diversity of sterlet populations
from the Middle and Lower Danube and Lower Tisza rivers, as a
prerequisite for their effective conservation and management. Analysis
of a highly variable D-loop fragment of mitochondrial DNA detected five
new haplotypes, while the eight previously identified haplotypes had
extended their previous range. Genetic variability could be attributed
almost entirely to individuals, with observed lack of population
structure. Negative values of neutrality test indicate recent expansion
on some sampling locations. Adittionaly, gene flow analysis between
Lower and Middle Danube region showed intensive exchange of speciemens.
At the same time analysis showed some influence of Tisza dam on gene
flow between samples from Tisza and Middle Danube section. Our study
indicated the need for a careful planning of sterlet stocking programmes
and inclusion of demographic data or catch time-series.
Кључне речи:
Acipenser ruthenus; mtDNA; population differentiation; gene flowИзвор:
Genetika-Belgrade, 2015, 47, 3, 1051-1062
DOI: 10.2298/GENSR1503051C
ISSN: 1820-6069