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Updated: Sep 10, 2025

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布拉加巴塔哥尼卡 (Isopoda: Cymothoidae) 的地理分布和形态方面扩展到巴西东亚马逊

I C S Oliveira^1,2, L Cardoso³, I C M Lima²

¹Universidade de São Paulo - USP, Centro de Energia Nuclear na Agricultura, Piracicaba, SP, Brasil.

Brazilian journal of biology = Revista brasleira de biologia

|August 27, 2025

概括

这项研究记录了Braga patagonica同类动物感染巴西马拉纳州的Hoplias malabaricus鱼. 它详细介绍了寄生虫的形态和发生情况,并指出了随着时间的推移而发生的感染率的变化.

科学领域:

动物学
寄生虫学
生态学

背景情况:

亚马逊雨林拥有巨大的生物多样性,
已知同类甲虫寄生于鱼类,影响鱼类的健康和分布.

研究的目的:

记录巴西马拉纳州Hoplias malabaricus寄生同类动物Braga patagonica的存在和特征.
分析B. patagonica的形态特征和寄生虫指数.
在东亚马逊地区建立B. patagonica的新地理记录.

主要方法:

在2021年至2022年期间,在巴西马拉纳采集了鱼类 (Hoplias malabaricus) 的样本.
从鱼中采集了同类动物 (Braga patagonica) 标本,并使用形态分析和测量进行鉴定.
计算了包括患病率,平均强度和丰度在内的寄生虫学指数.

主要成果:

总共有25个B.patagonica标本 (雌雄) 在鱼类中被发现.
在第一次采样期间,寄生虫的流行率为100%,在第二次采样期间为66. 67%.
雌性比雄性更大,有明显的尺寸和颜色差异.

结论:

这项研究证实Braga patagonica在巴西东北部Maranhão的一个新的地理位置.
这些发现有助于了解亚马逊东部的Cymothoidae同类动物的分布.
形态数据和寄生虫指数为未来的生态研究提供了基线信息.

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