Details

Autor(en) / Beteiligte

• Kovalenko, Yu
• Primachev, M.
• Potrokhov, A.
• Zinkovskyi, O.

Titel

Some adaptive reactions of the prussian carp Carassius auratus gibelio (Bloch) based on the excessive load of ammonium nitrogen

Ist Teil von

• Ribogospodarsʹka nauka Ukraïni, 2018-07, Vol.44 (2(44)), p.116-129

Ort / Verlag

Kiev: Institute of Fisheries

Erscheinungsjahr

2018

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Differences in morphophysiological parameters and accumulation of energy intensive substances in Prussian carp (Carassius gibelio Bloch, 1782), under a prolonged exposure to high concentrations of ammonium nitrogen, have been investigated. During the research, the following morphological, physiological and biochemical parameters of the Prussian carp were determined: condition factors, hepatic and splenic indices, protein, lipid and glycogen content in fish organs and tissues, and glucose content in blood plasma. The conducted studies showed that at a significant concentration of ammonium nitrogen up to 24.3 mg N/dm3 and with an increase in the adaptation time (from 3 months to several generations), the same-age groups of fish had a difference in body length and weight that was confirmed by Fulton and Clark. In the Prussian carp with the smallest and greatest adaptation time (3 months at a concentration of 24 N/dm3 and in several generations) to the ammonium nitrogen concentration of 48 mg N/dm3, the hepatic index was reduced (by 8 and 22.7 %) compared to control, while the hepatic index, by contrast, increased compared to control to a concentration of 24.3 mg N/dm3 in fish with adaptation equaling 3 years. In all experimental groups of the Prussian carp, stable protein content in muscles was noted. After adaptation of fish during 3 months, lipid content in the liver was slightly higher than reference values; however, after adaptation during 3 years, lipid accumulation was significantly lower than control (by 35 %), and in fish with long-term adaptation, lipid content in the liver approached reference values. Glycogen content in the liver of the experimental fish gradually increased with the duration of adaptation; however, with long-term adaptation to ammonium nitrogen concentration of 48 mg N/dm3, glycogen accumulation also approached the control. The obtained data can be used to understand the peculiarities of adaptation of cyprinids (Prussian carp), to their existence in reservoirs affected by excessive action of nitrogen compounds. This will allow to evaluate the conditions, under which new resistant fish populations are formed.