Ribogospod. nauka Ukr., 2013; 4(26): 38-49
DOI: https://doi.org/10.15407/fsu2013.04.038
УДК 597-113.4:597.554.3

CURRENT STATE OF COMMERICAL ICHTHYOFAUNA OF THE DNIPRODZERZHINSK RESERVOIR

A. Nazarov, This email address is being protected from spambots. You need JavaScript enabled to view it. , Institute of Fisheries NAAS, Kyiv
A. Borisenko, borisA@ua , Institute of Fisheries NAAS, Kyiv

Purpose. Evaluation of structural‐biological indices, which characterize the state of the Dniprodzerzhinsk reservoir from the point of view of conditions of formation and exploitation of commercial fish stocks.

Methodology. Field data were collected during 2013 using a standard set of control fishing gears (gill nets with mesh size a = 30 – 120 mm). Processing of ichthyological materials was conducted according to methods generally accepted for the Dnieper reservoirs. In total, 148 net‐days of control gill nets were analyzed, of which 1051 fish were selected.

Findings. Structural indices of the Dniprodzerzhinsk reservoir biocenoses was characterized by certain stability, the basis of ichthyofauna (46,6 % of the general ichthyofauna) is formed by bream represented in catches primarily by age‐6 – 9 fish, i.e. the modal range of this species remains stable. A negative trend of shortening of elder age groups is observed for roach that resulted in a decrease of weighted average age to 4,6 years. Similar trend is also observed for pike‐perch, however, high indices of catches of mean age groups indicate on entrance of abundant generations to the reproductive core. Total ichthyomass of commercial fish species (without taking into account Black Sea sprat) in 2013 can be estimated as 70,4 kg/ha.

Originality. For the first time during last 20 years, general description of the Dniprodzerzhinsk reservoir ichthyofauna has been presented and main qualitative and quantitative indices, which determined conditions of formation and exploitation of commercial fish stocks, have been analyzed.

Practical value. Results of this work have been used for determination of allowed amounts of commercial catch in the Dniprodzerzhinsk reservoir.

Key words: Dniprodzerzhinsk reservoir, ichthyofauna, population age structure, commercial fish stocks.

REFERENCES

1. Hrytcynyak, I. I. & Buzevich, I. Yu. (2008). Strategija racional'nogo i jeffektivnogo rybopromyslovogo ispol'zovanija vodohranilishh dneprovskogo kaskada. Kompleksnyj podhod k probleme sohranenija i vostanovlenija bioresursov kaspijskogo bassejna. mat. Mezhd. nauchno-prakt. konferencii. Astrahan', 76–79.
2. Vjatchanina, L. I. (1980). Rybohozjajstvennoe osvoenie kaskada dneprovskih vodohranilishh i puti povyshenija ih ryboproduktivnosti. Rybnoe hozjajstvo, 31, 3–9. 
3. Razrabotat' metody povyshenija ryboproduktivnosti dneprovskih vodohranilishh i vodoemov nizhnego Dnepra. (1990). Otchet po NIR (zakljuchitel'nyj 1986–1990 gg.), UkrNIIRH, 01.84.0074859; GR 87056478; Inv. 03484578511. Kyiv, UkrNIIRH.
4. Buzevych, I. Yu. (2012). Stan ta perspektyvy rybohospodars'koho vykorystannya  promyslovoyi ikhtiofauny velykykh rivnynnykh vodoskhovyshch Ukrayiny: dys. doktora biol. nauk: 03.00.10, Kyiv.
5. Chuklin, A. V. (2012). Pryntsypy vstanovlennya dopustymykh obsyahiv vylovu vodnykh bioresursiv u dniprovs'kykh vodoskhovyshchakh. Rybohospodars'ka nauka Ukrayiny, 3, 3–8.
6. Borysenko, A. V. (2011). Rist lyashcha yak skladova formuvannya yoho promyslovoho zapasu u Dniprodzerzhyns'komu vodoskhovyshchi. Rybohospodars'ka nauka Ukrayiny, 3, 36–40.
7. Buzevych, I. Yu. & Didenko, O. V. (2012). Intensyvnist' vykorystannya promyslovykh zapasiv lyashcha (Abramis brama L.) ta plitky (Rutilus rutilus L.) Dniprodzerzhyns'koho vodoskhovyshcha. Naukovi dopovidi Natsional'noho universytetu bioresursiv i pryrodokorystuvannya Ukrayiny, 1(30). Retrieved from website:  http://www.nbuv.gov.ua/e-journals/nd/2012_1/titul.html.
8. Osadchij, V. M. (2000). Regulirovanie rybolovstva i strategija ispol'zovanija rybnyh resursov v Kurshskom zalive: Diss. uchen. step. kand. biol. nauk. Kaliningrad.
9. Metodyka zboru i obrobky ikhtiolohichnykh i hidrobiolohichnykh materialiv z metoiu vyznachennia limitiv promyslovoho vyluchennia ryb z velykykh vodoskhovyshch i lymaniv Ukrainy. (1998). Kyiv.
10. Shibaev, S. V. (2007). Promyslovaja ihtiologija. Moskva: Prospektnauki.
11. Vyvchyty mekhanizmy funktsionuvannya bioheotsenoziv vnutrishnikh vodnykh ob"yektiv Ukrayiny zahal'noderzhavnoho znachennya. (2010). Zvit po NDR (zaklyuchnyy 2006–2010 rr.) IRH UAAN. DR 0110U002811. Kyiv.
12. Lapach, S. N., Chubenok, A. V. & Babich, P. N. (2002). Statistika v nauke i biznese. Kyiv: MORION.