Abstrak Comparing Effective Female Popupation Size and Ppopulation History of Tor tambroides From Gene COI (MTDNA)

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Authors

,Arif Wibowo,

The mahseer (Tor tambroides) is an important commercially fishes in Indonesia. Here we analyze DNA sequence data from the Cytochrom Oxidase Subunit 1 (COI) of the mitochondrial genome to estimate  genetic  effective  female  population  size  (Nef)  of mahseer  in  Manna  River, Bengkulu Province and Tarusan River, West Sumatra Province. The aim is to compare the effective female population size and population history of giant mahseer from two rivers which constitute different status of population and what could be fuel from the information. Samples obtained from the year of 2011-2012. The molecular data, a stretch of 628 nucleotides (Manna specimens) and 706 nucleotides  (Tarusan  specimens)  of  COI  of  mtDNA  were  used  to  investigate  effective  female population size (the formula theta (Ǿ) = 2 NefV) and population history of mahseer. Population history of mahseer was generate through growth module and neutrality test in DnaSP3.51 to yield mismatch distribution plot. Our results show that despite this reduction, the effective female population size of both populations is sufficient to survive from a genetic viewpoint. However, we have been able to show  that  protected  population  is  much  more  likely  to  be  higher  Ne  or  individuals  than  the unprotected population.  Therefore,  ongoing  conservation  efforts  remain  worthwhile.  The historic population  expansion  of the mahseer  (inferred from this study) may indicate a non  possible re- expansion in the future of the current population of the mahseer. It is possible for the mahseer to extinct if the mahseer population continues to decline and the necessary conservation actions are not taken.

Key words : Tor tambroides, effective female population size, mitochondrial DNA, population history