TY - JOUR AU - Litvinenko, L. I. AU - Kutsanov, K. V. AU - Razova, L. F. AU - Gadiadullina, A. Sh. AU - Gerasimov, A. G. AU - Brazhnikov, E. V. PY - 2021/06/16 Y2 - 2024/03/29 TI - Intra- and interpopulation variability of cysts and adults of Artemia (Branchiopoda: Anostraca) in Siberian populations (morphometry) JF - Marine Biological Journal JA - mbj VL - 6 IS - 2 SE - Scientific communications DO - 10.21072/mbj.2021.06.2.03 UR - https://marine-biology.ru/mbj/article/view/294 SP - 33-51 AB - <p>The size of <em>Artemia</em> cysts is an important indicator of their value as a food resource; to some extent, it allows to identify populations. The data on cysts of <em>Artemia</em> parthenogenetic populations (diameter, chorion thickness, and presence of spots on a shell), sampled in hyperhaline lakes of Western Siberia in different years, were analyzed, as well as the data on the morphometry of <em>Artemia</em> adults, reared from cysts at the same salinity. Significant intra- and interpopulation variability in the indicators was established. The absolute values of the cyst diameter were in the range of 210–330 µm, the mean values for the samples – 243.5–282.9 µm, the mean values for populations – 257.8–279.6 µm; the absolute values of the decapsulated cyst diameter were in the range of 196–294 µm, the mean values for the samples – 236.5–262.6 µm, the mean values for populations – 239.9–253.2 µm; the absolute values of the cyst chorion thickness were in the range of 3.3–16.9 µm, and the mean values for populations – 6.6–12.4 µm. In the main commercial fishing lakes, which account for about 70 % of the total catch of <em>Artemia</em> cysts in Russia, the cysts had similar mean population sizes: 262–268 µm. The absence of intrapopulation anchoring of the cyst diameter and chorion thickness values is concluded; so, they cannot serve as reliable indicators, identifying Siberian populations. Statistically significant correlation (<em>r</em> = −0.5) was established between salinity of a mother water body and <em>Artemia</em> embryo diameter. Cyst spotting, not exceeding 5 % in almost all the samples, reached 24 % in cysts of Kuchukskoye Lake. Analysis of morphometric indicators of <em>Artemia</em> adults, reared from cysts, showed as follows: the mean body length (9.27–11.63 mm), abdomen width (0.53–0.69 mm), and distance between eyes (1.36–1.52 mm) were closely correlated with salinity of a water body (<em>r</em> values were of −0.76; −0.62; and −0.67, respectively). Cluster analysis of a set of morphometric indicators of <em>Artemia</em> adults showed the unification of populations based on salinity.</p> ER -