海洋科学2025，Vol.49Issue(9)：65-72,8.DOI:10.11759/hykx20250929001
福建牡蛎成贝及幼贝对低盐胁迫耐受性分析
Low-salinity tolerance in adult and juvenile Crassostrea an-gulata
摘要
Abstract
To explore the tolerance of Crassostrea angulata to low-salinity stress,this study systematically ana-lyzed the effects of low-salinity stress on the survival,reproductive capacity,hemolymph osmoregulation,and gill tissue structure of adult and juvenile oysters by setting up a salinity gradient.The results indicated significant dif-ferences in the tolerance levels of C.angulata across developmental stages.For adults,the 7-day median lethal sa-linity(LS₅₀)was 13.5,with a sublethal salinity threshold of 19;for juveniles,these respective values were 9.5 and 14,indicating that juveniles were more tolerant.Salinity below 14 severely inhibited fertilization and hatching;the optimal salinity range for reproduction was 23-27.The hemolymph osmotic pressure equalized with that of the en-vironment within 12 h of stress exposure,suggesting that this species is a typical osmoconformer.Long-term low-salinity stress damaged gill tissues,which manifested as a widening of the interlamellar space,swelling of ap-ical cells,and detachment of cilia.This study clarifies the low-salinity tolerance limits of C.angulata at different life stages and the underlying physiological response mechanisms.It provides a scientific basis for healthy aqua-culture,germplasm resource protection,and disaster prevention and control in estuarine and coastal areas.关键词
福建牡蛎/低盐胁迫/盐度耐受性Key words
Crassostrea angulata/low-salinity stress/salinity tolerance分类
农业科技引用本文复制引用
薛海波,秦凯瑞,史博,郭团玉,缪雄平,阙华勇..福建牡蛎成贝及幼贝对低盐胁迫耐受性分析[J].海洋科学,2025,49(9):65-72,8.基金项目
海洋资源保护与生态治理福建省高等学校应用技术工程中心开放基金课题(2025-05) （2025-05）
福建省高校产学合作项目(2025N5010) （2025N5010）
福建省促进海洋与渔业产业高质量发展专项资金项目(FJHYF-L-2023-2) （FJHYF-L-2023-2）
福建省农业引导性(重点)项目(2024N0057)Applied Technology Engineering Center of Fujian Provincial Higher Education for Marine Resource Protection and Ecological Gov-ernance,No.2025-05 （重点）
University-Industry Cooperation Program of Fujian Province,No.2025N5010 （）
Fujian Province to Promote the High-quality Development of Marine and Fishery Industry Special Project,No.FJHYF-L-2023-2 （）
Fujian Provincial Agricultural Guidance(Key)Projects,No.2024N0057 （Key）
