Yancheva, VeselaStoyanova, StelaGeorgieva, ElenkaAntal, LaszloUzochukwu, Ifeany EmmanuelNagy, LaszloNyeste, KrisztianSamogyi, Dora2025-11-102025-11-102025-10-301313-9916https://doi.uni-plovdiv.bg/handle/store/727This study assessed lysosomal membrane stability (LMS) in hemocytes of Mytilus galloprovincialis from wild and farmed populations, using the Neutral Red Retention Time (NRRT) assay as a biomarker of environmental stress. Mussels were sampled in summer and autumn to evaluate seasonal variability, and the results were compared with our previous winter and spring data. NRRT values showed a significant reduction in both populations across seasons, indicating compromised lysosomal integrity and exposure to environmental stressors. Notably, wild mussels consistently exhibited lower NRRT values compared to farmed individuals, suggesting a higher stress burden. The underlying causes of this difference remain to be clarified.enBlack SeamusselsLMSArticle