Robainas Barcia Aymée, Espinosa López Georgina, Hernández Damir, García-Machado Erik
Centro de Investigaciones Marinas, Universidad de La Habana, Calle 16, No. 114 entre 1ra y 3ra, Miramar, Playa, Ciudad Habana 11300, Cuba.
Mol Ecol. 2005 Sep;14(10):2933-42. doi: 10.1111/j.1365-294X.2005.02613.x.
Population genetic studies carried out on penaeid shrimps have disclosed different patterns of population subdivision, revealing new aspects of shrimp biology as well as the effects of historical contingency molding those patterns. However, the stability of observed allele frequencies over time still remains untested. The objective of this article is to show the analysis of the temporal variation of allozymes in a shrimp species inhabiting Cuba which proves that the genetic structure of this species could significantly change in time. The study involves four populations of Farfantepenaeus notialis sampled in a period of 8 years. The significant statistics obtained from partitions observed in 1995 were not detected in 2003 (as suggested by AMOVA and F(ST)), whereas temporal genetic differentiation and heterozygosity became highly significant. The results strongly suggest that the effect of migrations could be the cause for the loss of F. notialis genetic structure in 2003. It is therefore imperative to call attention on the vulnerability of these populations when facing unstable environmental and habitat conditions.
对对虾进行的群体遗传学研究揭示了不同的群体细分模式，揭示了对虾生物学的新方面以及塑造这些模式的历史偶然性的影响。然而，观察到的等位基因频率随时间的稳定性仍未得到检验。本文的目的是展示对栖息在古巴的一种对虾物种中同工酶的时间变化分析，这证明该物种的遗传结构可能会随时间发生显著变化。该研究涉及在8年时间内对4个纳氏对虾种群进行采样。1995年观察到的分区中获得的显著统计数据在2003年未被检测到（如AMOVA和F(ST)所表明的），而时间遗传分化和杂合度变得非常显著。结果强烈表明，迁移的影响可能是2003年纳氏对虾遗传结构丧失的原因。因此，当面对不稳定的环境和栖息地条件时，必须关注这些种群的脆弱性。
