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MAIN CHEMICAL PARAMETER WITH PATHOLOGICAL INFLUENCE CONDITION IN FISH


AIDA VASILE, GEORGE VASILESCU, VALERIU GHEORGHE

Issue:

SCSB, Volume XI

Section:

Ecology, Limnology

Abstract:

Fish population from various breeding systems, may be affected by diseases other than those infection or parasitical, namely unspecific diseases. Physical and chemical ambient, nutritional and constitutional agent causes these.

Water chemistry is defined by a multitude of parameters, from which more important for fishes' life are pH, dissolved gasses (oxygen and carbon dioxide), organic mater in suspension, its concentration in ammonia, nitrites, nitrates, phosphates, chlorides, sulfates, hydrogen, sulfides, metals, detergents, pesticides and phenols.

Starting from this reason, in the present work it is shown the evolution of the main chemical parameters in the pond water for breeding cyprinids of first year EC3A from Brates farm during the year 2004.

There were examined water pH, dissolved oxygen content (mg/l), decomposing organic matter (mg of KMnO4/l of water), ammonia (mg of NH3/l of water) and nitrites (mg of NO2/l of water), parameters which indicate, in the situation of exceeding of the admissible limits for culture cyprinids, which may cause pathological conditions in fish.

From May to October 2004, as a result of the conducted research, there have been 7 parasitic diseases registered on the cyprinids of the first summer from the EC3A growth pond.

Keywords:

fish, chemical parameters, pathological influence, cyprinids.

Code [ID]:

SCSB200611V11S03A0009 [0002511]


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