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指纹种群的大小对养殖场养的海峡鱼的增殖病严重程度没有影响

Bradley M Richardson¹, Noor Ul-Huda^2,3,4, Cynthia Ware^2,3

¹U.S. Department of Agriculture, Agricultural Research Service, Warmwater Aquaculture Research Unit, Stoneville, Mississippi, USA.

Journal of aquatic animal health

|April 4, 2025

概括

养殖较大的道鱼的指纹并不能防止腺增殖性疾病 (PGD). 池水和状组织中的寄生虫水平是影响PGD的主要因素,而不是鱼类大小.

科学领域:

水生动物卫生水生动物卫生
鱼类病理学鱼类病理学
寄生虫学的寄生虫学

背景情况:

由myxozoan Henneguya ictaluri引起的增殖病 (PGD) 显著影响美国东南部的海峡鱼水产养殖.
在将手指大小的鱼转移到成长池时,PGD爆发最常见.
目前的缓解依赖于避免带有致命寄生虫度的池,通过哨兵鱼或qPCR检测到.

研究的目的:

为了评估养殖更大的海峡鱼指是否会提高生存率.
为了研究指纹大小对PGD相关状况指标的影响.
为了评估更大的指纹作为PGD缓解策略的有效性.

主要方法:

两种尺寸 (约12厘米和20厘米) 的海峡鱼指纹被放置在19个商业池的网中,其中H. ictaluri的含量各不相同.
在一周后,对鱼类的死亡率进行了监测,并对幸存者进行了PGD总体,组织学和分子迹象的评估.
部损伤的评估是通过湿分析进行解病变和PGD病变和寄生虫阶段的组织学评估.

主要成果:

关于状况,没有发现指纹大小和寄生虫负担 (在池水或组织中) 之间的显著相互作用.
池水和组织中的寄生虫度是状况指标的唯一显著预测指标.
较大的指纹并没有显示出较大的寄生虫负载的池中较小的指纹相比,改善了生存率或减少了状损伤.

结论:

养殖较大的海峡鱼的指纹不会对PGD死亡率或次致命的部损伤提供显著的保护.
储存的手指幼的大小并不能减轻H. ictaluri感染的影响.
管理策略应侧重于控制池中的寄生虫水平,而不是依赖养殖更大的鱼类.

关键词:

亨内古亚 (Henneguya) 是一个的植物.水产养殖的水产养殖疾病疾病疾病疾病在我的xozoanzoan.寄生虫寄生虫是一种寄生虫.扩散性病扩散性病

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