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使用稳定同位素技术分析阿根廷 (Merluccius hubbsi) 和Anisakidae之间的热带关系

Yue Shu¹, Feiyu Wu¹, Zhou Fang^1,2,3,4,5

¹College of Marine Living Resource Sciences and Management, Shanghai Ocean University, Shanghai 201306, China.

|July 26, 2024

概括

稳定的同位素显示,阿根廷海中的Anisakidae幼虫主要使用宿主胃的营养物质. 寄生虫的饮食多样性因宿主成熟度和感染水平而异,影响鱼类生长洞察力.

科学领域:

海洋生物学海洋生物学
寄生虫学的寄生虫学
生态石化测量方法生态石化测量方法

背景情况:

阿根廷 (Merluccius hubbsi) 是西南大西洋的一个经济重要渔业物种.
Anisakidae幼虫是M. hubbsi的常见寄生虫,但它们与宿主的营养相互作用尚不清楚.
了解宿主-寄生虫的营养关系对于评估鱼类健康和生态动态至关重要.

研究的目的:

通过使用稳定同位素分析,研究Anisakidae幼虫与Merluccius hubbsi不同组织之间的特定营养关系.
确定Anisakidae幼虫在其宿主体内使用的主要营养来源.
评估宿主成熟度和寄生虫负载如何影响这些营养动态.

主要方法:

稳定同位素分析 (δ13C和δ15N) 对Anisakidae幼虫和M. hubbsi.的各种组织 (肌肉,肝脏,胃,生殖腺) 进行.
在宿主组织和寄生虫之间计算了 δ13C 和 δ15N 的热量歧视因子 (ΔTDF).
评估了营养的宽度 (碳范围,CR;范围,NR).
使用统计分析 (克鲁斯卡尔-瓦利斯测试) 来评估基于宿主成熟度和寄生虫感染水平的 ΔTDF 差异.

主要成果:

寄生虫的 δ13C 值低于大多数宿主组织,与胃部分重叠,表明主要依赖胃衍生的营养素.
寄生虫表现出广泛的碳和范围,表明不同的营养来源.
主体肝脏和寄生虫之间的δ13C (ΔTDFδ13C) 形歧视因子显示出最大的变化,这意味着肝脏碳的显著依赖.
随着宿主性腺成熟 (p < 0.01),ΔTDFδ13C显著下降,并且随着肌肉,肝脏和胃中的寄生虫感染水平显著变化.

结论:

阿根廷海中的Anisakidae幼虫主要从宿主的胃中获取营养,显著依赖肝脏的碳来源.
寄生虫的营养策略受到宿主成熟度和感染强度的影响,影响宿主-寄生虫的营养动态.
这些发现增强了对M. hubbsi生长条件,息地以及寄生虫的生态影响的理解.

关键词:

它们属于Anisakidae.梅鲁西乌斯的丈夫.稳定的同位素分析.获得奖杯的歧视因素.

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