PENDEKATAN FENETIK TAKSONOMI DALAM IDENTIFIKASI KEKERABATAN DAN PENGELOMPOKKAN IKAN GENUS TOR DI INDONESIA
Abstract: Tor genus is a local
Indonesian freshwater fish, and endangered species. The urgent conservation
efforts should be made to determination of relationship based on phenetic
approach. This is because the taxonomical position and classification of this
fish were unclear. The data used in this study were meristic, general of
morphology, and special character to determinate up to the species level. The
special characters of this fish were the existence and size of the median lobe.
Samples were taken from Banyu Biru lake (Lokal name were Sengkaring and
Tambra), as well as the related species, They were consists of Tor duoronensis
from Padang, Tor Tambraides from West Borneo, and Tor soro were obtained from
North Sumatra. Fenogram formed based on UPGMA method. According to the
phenogram, it was shown that 3 related groups of Tor Genus laid from near to
far distance based on their relationship, 2 apomorphy and 4 automorphy group.
The first consists of two subklad namely Tor duoronensis and Sengkaring with
their similarity index 100%, and Tambra was sister clad of Tor duoronensis
supported by the similarity index of 92.9 %. The second Subklad consists of Tor
tambra and Tor soro (Apomorfi B) with a similarity index 59%, while the
furthest distance Tor tambraides with similarity index of 45, 625%. Tambra and
Sengkaring showed a grouping pattern that closely related to Tor duoronensis based
on seven main distinguishing morphometric features. Seven main distinguishing
features were consist of: size of median lobe, SL (standard length), MXBL
(maxillary barbels lenght), CPL (caudal peduncle lenght), PDL (pre dorsal
lenght), IW (interorbital width) and SNL (snout lenght). Furthermore, the
results of morphometric analysis showed that Sengkaring and Tambra was indeed
not a member of Tor Tambraides and Tor soro species due to significant
difference of body size.
Penulis: Dwi Anggorowati
Rahayu
Kode Jurnal: jpbiologidd140197
