鱼类鳃部的秘密：揭开养殖中的生死之战！

鱼烂腮之谜：揭秘最暴利养殖品种的生死战场！

鱼烂腮是怎么回事？

1.由鱼害粘球菌引起的细菌性烂鳃病，鳃丝腐烂，严重时鳃软骨外露，并且常带有污泥，鳃盖内侧表面充血，中央表皮常被腐蚀成一个圆形透明的小洞，俗称“开天窗”。

2.由真菌引起的鳃霉病，病鱼鳃部呈苍白色，有时有点状充血或出血现象。此病常使鱼暴发性地死亡，镜检会发现鳃霉菌丝。

3.由寄生虫引起的鳃病

①原生动物的大量繁殖和骚扰，使得fishes' gills produce an excessive amount of mucus, which severely impairs their respiration, resulting in prolonged floating on the surface and even death.

②The parasitic protozoan causes lesions on the epithelial tissue of the gills, visible as white spots or lumps under a microscope.

③Ringworm infection results in swollen gills with a slightly open operculum, increased mucus production and grayish-yellow gill filaments that are observable through microscopy.

④Schistosomatium indicum infestation leads to enlarged and whitened distal ends of the gill filaments filled with numerous worm bodies and attached to them by larvae.

How do we treat fish with diseased gills?

Maintain crystal-clear water quality in fish ponds to enhance their natural purification abilities.

Employ potassium permanganate or copper sulfate alternately for regular pond bottom changes to stabilize water quality while preventing excessive levels of ammonia and nitrite ions.

Conduct periodic treatments against parasites using products containing active ingredients that can directly disrupt oxidative phosphorylation systems within parasite cells, thus effectively killing various internal parasites such as tapeworms, ringworms, and flatworms.

This concludes our discussion about diseased gills in farmed fish species; please feel free to leave comments below!