This paper presents the data related to morphometric and physiological
(hematological) characteristics of brown trout (Salmo trutta) from the Ponor
River. This river rises near the village Podrašnica (municipality of Mrkonjić
Grad), sinks above the ground and after a while, near the settlement of Krupa na
Vrbasu, appears as a source of the Krupa River (tributary of the Vrbas River).
Fish sampling was performed during the summer of 2015 and during this period
22 Salmo trutta units were caught (11 females and 11 males). On that occasion,
several morphometric (total and standard body length) and hematological traits
(Hct-hematocrit, Hb-hemoglobin and MCHC – mean corpuscular hemoglobin
concentration), body mass and Fulton’s condition factor were analyzed. The
average value for total body length was 18.85 cm and for standard body length it
was 16.85 cm; the mean value for body mass was 80.38 g, and for Fulton’s
condition factor 1.41. In case of hematological parameters, the average value for
Hct was 0.39 l/l, Hb 70.62 g/l and MCHC 180.64 g/l erythrocytes. The estimated
parameters can serve as indicators for the condition of these aquatic organisms,
and indirectly, the state of their environment.
