STUDY ON THE STATUS OF FISH COMMUNITIES ON TRIBUTARIES
SITUATED IN THE MOUNTAIN AREA OF BISTRITA RIVER UPSTREAM
RESERVOIRS
STOICA IONUŢ, BATTES KLAUS WERNER, PRISECARU MARIA „Vasile Alecsandri” University of Bacau, Faculty of Science, Department of Biology, Marasesti Street, 157, Romania,
e-mail: ionut_stoica23@yahoo.com; klaus_battes@yahoo.com; prisecaru_maria@yahoo.com;
This paper tries to highlight the extent to which were affected fish communities on the Bistrita River tributaries in the upper basin. For this purpose samples were taken from 10 collection points both on tributaries of right and left of the Bistrita River. Sampling was done in the spring and summer when fish species are active foraging and reproduction. In each collection point were recorded a number of physico-chemical water parameters (temperature, conductivity, pH, amount of O2 dissolved in water), habitat status data (collected surface, water depth, speed, altitude and GPS coordinates) and raw data on fish samples (number of specimens per species and biomass). Through data processing and calculation of indices ecological, biodiversity index could highlight the current status of fish fauna, which was comparable to that existing before the human impact after 1960. By determining the IBI was revealed that the fish communities of the Bistrita river tributaries, upstream from Lake Bicaz, were the least affected, except tributary Neagra Şarului.
