Analysis of the morphological variability of the bream (Abramis brama Linnaeus, 1758) Dnipro-Buh river mouth system

Authors

DOI:

https://doi.org/10.15587/2519-8025.2018.153464

Keywords:

Dnipro-Buh river mouth system, bream, meristic, plastic signs, morphological variability

Abstract

Hydraulic construction on the Dnipro River led to dramatic changes in the ichthyocenosis of the estuarine waters. As a result of the regulation of the natural flow, the dynamic balance between the abiotic and biotic parameters of the habitat of aquatic organisms throughout the Dnipro-Buh river mouth system was disturbed.

Transformational processes that have lasted to the present time are accompanied by changes in the main structural characteristics of ichthyocenosis, where one of the most valuable representatives of commercial cyprinids has always been the bream – Abramis brama Linnaeus, 1758.

Purpose. To conduct a morphometric analysis of bream of the Dnipro-Buh river mouth system in modern conditions. To compare the results with scientific data for previous periods of succession of the ecosystem of the Dnipro-Buh river mouth system. To explain the causes of morphological variability of bream over time and analyze sexual dimorphism in the herd.

Materials and methods. The research work is carried out in accordance with generally accepted methods of ichthyological research. Morphological variability is determined by Student's t-test (td). Bream individuals from age groups of five-year-old and six-year-olds are used for analysis, which makes it possible to compare the obtained data with the results of previous studies.

Results. The study of the meristic signs of bream shows that at present the formulas of the fins are as follows: D - III 9 (10); A - III 24-26 (27); P - I 16-18; V - II 7-8; C I 19 I, and in the sideline there are from 53 to 56 scales. The results are within the limits of similar scientific data of the last century.

It is established that the most significant changes in the proportions of the body in bream during the transformation of the drain of the Dnipro occur in height and length of the dorsal fin (td=7.5-8.7; р<0,05). At the same time, an elongation of the caudal stem (td=10.2; p<0.05) and a decrease in the ante-anal distance (td=4.0; p<0.05) are noted. The presence of sexual dimorphism in the herd is proved. Among the 22 analyzed plastic signs, a significant difference is found for 13 indicators. In males, due to greater mobility, the anal fin is located closer to the fish snout (td=3.38; p<0.05), the head is more pointed (td=3.77; p<0.05) and below the body (td=3.5; p<0.05).

Conclusions. A comparative analysis of modern plastic signs of bream in the Dnipro-Buh river mouth system indicates changes in the proportions of the body. At present, it has been reliably established that the anal fin has shifted closer to the anterior end of the body (td=4.0; p<0.05), which is a consequence of the fundamental redistribution of river flow and a decrease in the flow velocity. This is the situation that led to the lengthening of the migration routes of the bream in the Dnipro-Buh river mouth system and the formation of a population that is characterized by high mobility.

Author Biography

Konstantin Gеіna, Institute of Fisheries of the National Academy of Agrarian Sciences of Ukraine Obukhivs'ka str., 135, Kyiv, Ukraine, 03164

PhD, Senior Researcher

Department of study of bioresources of reservoirs 

References

Shmakov, V. M. (1988). Gidrologo-ekologicheskie aspekty rezhima solnechnoy energii v vodohranilishchah Dneprovskogo kaskada. Kyiv: Naukova dumka, 168.

Zhuravleva, L. A., Zhukinskiy, V. N., Ivanov, A. I. (1976). Vliyanie gidrotekhnicheskogo stroitel'stva na gidrologiyu i kachestvo vody v Dneprovsko-Bugskoy ust'evoy oblasti. Trudy IV Vsesoz. gidrol. s'ezda. Leningrad: Gidrometeoizdat, 9, 146–152.

Pravotorov, B. I., Sarkisyan, V. I., Gorbonos, V. N., Geyna, K. N. (2005). Ulovy i sovremennoe sostoyanie promyslovyh ryb Dneprovsko-Bugskoy ust'evoy oblasti. Rybnoe hozyaystvo Ukrainy, 5 (40), 15–18.

Sherman, I. M., Heina, K. M., Kutishchev, S. V., Kutishchev, P. S. (2013). Ecological transformations of riverine hydroecosystems and current problems of fisheries. Rybohospodarska nauka Ukrainy, 4, 5–16.

Heina, K. M. (2014). Osoblyvosti promyslovoho vykorystannia liashcha Dniprovsko-Buzkoi hyrlovoi systemy. Tavriyskyi naukovyi visnyk, 87, 164–169.

Geyna, K. N. (2013). Kachestvennaya struktura promyslovyh ulovov ryby v Dneprovsko-Bugskoy ust'evoy sisteme v konce XX veka. Materialy dokladov 2-y mezhdunarodnoy nauchnoy konferencii «Vosproizvodstvo estestvennyh populyaciy cennyh vidov ryb». Sankt-Peterburg: FGBNU «GosNIORH», 95–97.

Buzevitch I. (2008). Current state of commercial ichthyofauna of the Kakhovka reservoir. Rybohospodarska nauka Ukrainy, 4, 4–9.

Briuzghin, V. L. (1967). Struktura nerestovykh stad i stan zapasiv osnovnykh promyslovykh ryb u ponyzzi Dnipra. Vplyv zarehulovanoho stoku na biolohiyu ta chyselnist promyslovykh vydiv ryb. Kyiv: Naukova dumka, 91–128.

Vladimirov, V. I., Suhoyvan, P. G., Bugay, K. S. (1965). Razmnozhenie ryb v usloviyah zaregulirovanogo stoka reki. Kyiv: AN USSR, 395.

Buzevych, О. (2008). Biological state of bream population of the Kiev reservoir in conditions of intensive commercial exploitation // Rybohospodarska nauka Ukrainy, 4, 9–13.

Buzevych, I. Yu. (2002). Dynamika vikovoho skladu liashcha Kakhovskoho vodoskhovyshcha. Problemy akvakul'tury i funkcionirovaniya vodnyh ekosistem. Kyiv, 19–20.

Pravdin, I. F. (1966). Rukovodstvo po izucheniyu ryb. Moscow: Pishchevaya promyshlennost', 375.

Aksyutina, Z. M. (1968). Elementy matematicheskoy ocenki rezul'tatov nablyudeniy v biologicheskih i rybohozyaystvennyh issledovaniyah. Moscow: Pishchevaya promyshlennost', 289.

Zinov'ev, E. P. (1972). Morfologicheskie izmeneniya srednekamskogo leshcha pod vliyaniem zaregulirovannogo rechnogo stoka. Uchenye zapiski Permskogo universiteta, 261, 50–67.

Kustarev, G. F. (1969). Biologiya ryb basseyna sredney Kamy. Uchenye zapiski Permskogo universiteta, 195, 3–18.

Movchan, Yu. V., Smyrnov, A. I. (1983). Fauna Ukrainy. Vol. 8. Ryby. Vyp. 2.: Koropovi. Ch. 2: Shemaia, verkhovodka, bystrianka, ploskyrka, abramis, rybets, chekhonia, hirchak, karas, korop, hipoftalmikhtys, arystykhtys. Kyiv: Nauk. dumka, 360.

Published

2018-12-31

How to Cite

Gеіna K. (2018). Analysis of the morphological variability of the bream (Abramis brama Linnaeus, 1758) Dnipro-Buh river mouth system. ScienceRise: Biological Science, (6 (15), 9–14. https://doi.org/10.15587/2519-8025.2018.153464

Issue

Section

Biological Sciences