ДИНАМІКА СТАНУ ПОСЕЛЕНЬ МІДІЇ MYTILUS GALLOPROVINCIALIS LAMARCK, 1819 У ТИЛІГУЛЬСЬКОМУ ЛИМАНІ

• Datum: 2026
• 1. Verfasser: Стадніченко, С.В.
• Format: Artikel
• Sprache: Ukrainisch
• Veröffentlicht: Marine Ecological Journal 2026
• Schlagworte: Тилігульський лиман; Mytilus galloprovincialis; мас-розмірні співвідношення; морфологія чере- пашки; фенотип.
• Online Zugang: https://mej.od.ua/index.php/mej/article/view/724
• Назва журналу: Marine Ecological Journal

The Tylihul Estuary is one of the largest in the northwestern part of the Black Sea. The article presents a comparative analysis of the population structure of mussels from benthic natural settlements of the Tylihul Estuary during 2002–2025. Mussel length in the settlements ranges from 16.2 to 98.4 mm, with average values varying by year from 46.01 to 72.2 mm. The average weight of raw mussel meat changed over time: minimum values were 0.868 g, maximum 7.907 g. To compare the condition of mussels in the settlements of the Tylihul Estuary, their population characteristics were analyzed for two time periods: Period 1 (2002–2010); Period 2 (2021–2025). It was determined that the average length, width, and thickness of mussel shells differ between the study periods: the convexity index is lower in mollusks sampled in Period 2, indicating a decrease in the protective properties of mussels in the formation of their skeleton. Based on empirical data, regression equations were calculated for the relationship between the mass of soft tissues (Ww), dry tissues (Wd), and shell mass relative to mussel length for each period. It was found that at a mussel length of 40 mm, the calculated shell mass in 2002–2010 was 4.022 g, while in 2021–2025 for the same length it was only 1.465 g. Thus, mussel shells have become thinner in recent years. Analysis of phenotype distribution by the presence of violet pigment in the prismatic layer of the mussel’s outer surface over time shows no differences in the proportion of brown mussels, while the share of blue mussels decreased and the proportion of striped mollusks increased in recent years. The morphological structure of mussels, distinguished by the development of the prismatic layer of the shell in the ligament area, also differs: the proportion of mussels of morphological type GB varied on average from 3,94% to almost 38,6% over the analyzed periods, significantly increasing during 2021–2025. It was determined that changes in the hydrochemical regime of the Tylihul Estuary affect the morphology of M. galloprovincialis shells in benthic natural settlements.