Softmouth Trout From The River
Zeta – Salmo obtusirostris zetenzis
taxon has been less studied. The general external features
of the Zeta softmouth are more brown trout-like than
any other subspecies of the softmouth trout. Even its
spawning time that is allegedly in December is different
from other softmouth trout that spawn in spring.
The Zeta softmouth trout was first described as Trutta
obtusirostris letnica and later renamed to Salmo
obtusirostris letnica (Karaman, 1932, 1957). Due to certain morphological
similarities with respect to head bones of other softmouth
trouts, some ichthyologists (e.g., Drecun, 1962; Karaman,
1966) classified it as Salmothymus obtusirostris
zetenzis (see Šorić, 1990 for review). It also shares some morphological
similarities with grayling. Interestingly, local people
call it “lipjen”, which is a derivate form of the word
“lipljen” meaning grayling.
From the above mentioned it is evident that the taxonomy
of this taxon is puzzling and still needs to be resolved.
These fish used to be abundant, however, due to intense
poaching, their number has drastically declined,
and according to some ichthyologists, the taxon
extinct. Nevertheless, we managed to obtain a few
samples, and DNA analysis
for its phylogenetic and taxonomic clarification has been undertaken.
Drecun, Dj. 1962. Hydrobiologia Montenegrina, 2: 8.
Karaman, M. 1966. Hydrobiologia, 28: 1-41.
Karaman, S. 1932. Ribarski list, 7: 3.
Karaman, S. 1957. Folia Balcanica, 1: 1-14.
Šorić, V. 1990. Acta Soc. Zool. Bohemoslov., 54: 305-319.