马元,张兴志,何苹萍,官俊良,韦嫔媛,张立,李蔚,朱鹏,许尤厚,严雪瑜,陈晓汉,彭金霞

• 1:北部湾大学海洋学院
• 2:广西水产科学研究院广西水产遗传育种与健康养殖重点实验室

摘要(Abstract)：

【目的】探究不同氧浓度胁迫对香港牡蛎（Crassostrea hongkongensis）摄食和代谢的影响。【方法】比较0.5、1、2、3 mg/L 等低氧和常氧条件下，香港牡蛎的摄食率（I）、个体摄食率（I_(ind)）、单位体质量的摄食率（I_(mass)）、耗氧率（R_O）和排氨率（R_N）的变化规律，并进一步分析急性低氧和 48 h 持续低氧对香港牡蛎摄食和代谢的影响。【结果】不同低氧条件下，香港牡蛎各项指标均随溶解氧（Dissolved oxygen,DO）质量浓度的下降而降低，并且急性低氧处理组摄食和代谢强度下降幅度均大于持续低氧 48 h 组。急性低氧组溶解氧浓度与摄食率的相关关系为I_1 = 31.225 ln ρ(DO) + 35.509,R2 = 0.980 5,I_(ind)、I_(mass)、R_0、R_N的变化范围分别为 5 × 10~7 ～ 4.8 × 10~8 个/(只·h)、7 × 10~7～ 4.8 × 10~8 个/(g·h)、0.1 ～ 0.7 mg/(g·h)、4 ～ 25 μg/(g·h)。持续低氧 48 h 组溶解氧质量浓度与摄食率的相关关系为 I_2 =36.439 ln ρ(DO) + 19.163,R2 = 0.839 7,I_(ind)、I_(mass)、R_0、R_N的变化范围分别为 1.2 × 10~8 ～ 5.3 × 10~8个/(只·h)、1.1 × 10~8～ 4.8 × 10~8 个/(g·h)、0.2 ～ 0.8 mg/(g·h)、18 ～ 32 μg/(g·h)。【结论】香港牡蛎的摄食和代谢受水环境中溶解氧质量浓度影响，氧质量浓度越低，摄食和代谢水平越低，经低氧环境适应 48 h 后，摄食和代谢能力可产生一定水平恢复，但仍低于常氧水平。

关键词(KeyWords)： 香港牡蛎;低氧胁迫;摄食;耗氧率;排氨率

Abstract:

Keywords:

基金项目(Foundation): 广西重点研发项目（桂科AB21196030）;; 广西自然科学基金青年基金（2019GXNSFBA245081）;; 广西创新驱动发展专项（桂AA17204094-3）;; 国家现代农业（贝类）产业技术体系建设项目（CARS-49）

作者(Author): 马元,张兴志,何苹萍,官俊良,韦嫔媛,张立,李蔚,朱鹏,许尤厚,严雪瑜,陈晓汉,彭金霞

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