Influence of abiotic factors on productivity indicators of A. var. Principalis in aquaculture

The work is devoted to the study of the influence of abiotic factors, primarily the salinity level on the productivity of artemia in aquaculture in situ. The problem is relevant, since in the last decade there has been an increase in global aquaculture production by 35%, which has led to an increase in the need for artemia cysts and the nauplia obtained from them. Due to the shortage on the world market of artemia cysts extracted in natural ecosystems and their high cost, there is a need to improve the methods of cultivating artemia in a closed cycle in an artificial ecosystem – in aquaculture. To develop effective methods of cultivating artemia in situ, it is important to know the production and morphological indicators of different types of artemia and its races in an artificially created environment. It is known that there is a wide ecological valence of the reproductive function of artemia in relation to varying environmental factors. One of the most important factors determining the reproductive potential of artemia is the salinity of the environment. The level of salinity of water has a great influence on the productivity of artemia crustaceans, both in the natural environment and in aquaculture. The aim of our study was to assess the reproductive potential of artemia and optimize the salinity of the environment to increase the reproductive potential in conditions of artificial breeding in situ. The results of the study showed that with an increase in the concentration of salt in the solution for the cultivation of the available artemia race – A. var. Principalis, – the proportion of synchronously fruiting females increased. When studying the absolute fertility of artemia, it was shown that an increase in the salinity level of the habitat at the reproductive age of females makes it possible to increase their absolute fertility when growing in a closed cycle in aquaculture.

1. Vesnina, L.V. Conditions for the formation of artemia populations and their production indicators in different types of hyperhaline lakes of the Altai Territory / L.V. Vesnina // "Innovations and food security". – 2020 (a). – № 4 (30). – Pp. 87-100. DOI:10.31677/2072-6724-2020-30-4-87-100

2. Razova, L.F. Reproductive features of artemia of Siberian populations / L.F. Razova, L.I. Litvinenko // II Vseros. (national) scientific- practical conf. Modern scientific and practical solutions in the agro-industrial complex / GAU of the Northern Trans-Urals. collection of articles. Tyumen. – 2018. – Pp. 249- 258.

3. Castro, M.J. Salinity effects on the reproductive patterns of five coastal Pacific Artemia franciscana strains from Mexico / M.J. Castro, M.G. Castro, R. Bridi, C.D. De Oliveira // International Journal of Science and Knowledge. – 2013. – 2:(1). – Р. 26–33.

4. Kostromin, E.A. The influence of environmental factors (salinity, temperature, lighting) on the incubation of Artemia salina in an experiment / E.A. Kostromin // Izvestiya St. Petersburg State Agrarian University. – 2016. – No. 42. – Pp. 164-168. DOI:10.24411/2078-1318

5. Castro, M.J. Efecto de la salinidad en la supervivencia, crecimiento y caracteristicas reproductivas de 13 poblaciones mexicanas de Artemia franciscana / M.J. Castro // Doctoral thesis, Universidad Autonoma Metropolitana, Mexico, 2011. – Р. 98.

6. Romanova E.M. Vectors for the development of high-tech industrial aquaculture / E.M. Romanova, V.V. Romanov, V.N. Lyubomirova, L.A. Shadyeva, T.M. Shlenkina //В сборнике: BIO WEB OF CONFERENCES. International Scientific-Practical Conference “Agriculture and Food Security: Technology, Innovation, Markets, Human Resources” (FIES 2020). EDP Sciences, 2020. – Pp. 00132.

7. Bogatova, I.B. Incubation of Artemia salina eggs on an industrial scale / I.B. Bogatova, N.V. Pechnikov, Z.I. Shmakova // development of warm waters of energy facilities for intensive fish farming // Materials of the scientific conference. – Kiev: Naukova dumka. – 1978. – Pp. 245-248.

8. Romanova, E.M. Technology of enrichment of early artemia nauplia and the effectiveness of their use as starter feeds /E.M. Romanova, V.V. Romanov, V.N. Lyubomirova, E.B.U. Fazilov// Bulletin of the Ulyanovsk State Agricultural Academy. 2022. – №4 (60). – Pp. 150-155. DOI: 10.18286/1816-4501-2022-4-150-155

9. Romanova, E.M. Factors regulating the ontogenesis of A. Salina and its productivity during in vitro cultivation /E.M. Romanova, V.V. Romanov, V.N. Lyubomirova, E.B.O. Fazilov// Bulletin of the Ulyanovsk State Agricultural Academy. 2022. – №3 (59). – Pp. 148-153. DOI: 10.18286/1816-4501-2022-3-148-153

10. Velasco, S.J. Effect of different salinities on the survival and reproductive characteristics of populations of Artemia franciscana Kellogg, 1906 from coastal and Inland waters / S.J. Velasco, O.D. Retana, M.J. Castro, M.G. Castro, C.A.E. Castro // Journal of Entomology and Zoology Studies. – 2018. – 6(2). – Рp. 1090–1096.

11. Kovacheva, N.P. The current state and prospects for the development of aquaculture of artemia in Russia / N.P. Kovacheva, L.I. Litvinenko, E.M. Saenko, A.V. Zhigin [and others] // Proceedings of VNIRO. – 2019. – Vol. 178. – Pp. 150-171. DOI:10.36038/2307-3497

12. Boyko, E.G. The influence of environmental factors on the growth of crustaceans of the genus artemia of Ural and Siberian populations /E.G. Boyko //Siberian Ecological Journal. 2013. – Vol. 20, No. 3. – Pp. 333-339. DOI:10.15372/SEJ