龙巅
诊断锦鲤鱼病的十种方法
2018-07-13 13:30:19
14
66
一、依据鱼的活动情况
健壮的鱼一般是成群集游，行动灵活，反应敏捷，很少一直在水面,即使上浮受惊即潜入水中。病鱼则通常离群独游，行动缓慢，反应迟钝，受惊后略向水底下潜，后缓慢游出水面。当鱼有孢子虫、中华蚤、指环虫等寄生虫病时，会在水面发狂打转或持续跳跃。
二、依据鱼的摄食情况
正常的鱼摄食时，抢食力强，且食量比较稳定，形成规律的鱼到点就在饵料台附近转。如果发现鱼的食量逐渐减少，甚至绝食，应迅速检查病因。首先要检查水质，其次要看看鱼鳃。
三、依据鱼的体色变化
各种鱼类都有自己特有的体色，虽然会由于水色的变化有一定的变化，但一般变化不大。如发生疾病，则有体色变化，如烂鳃病发病时，鱼体体色则变黑，尤其以头部为甚。肝脏受损一般会体色发淡，背鳍、尾鳍有白边。
四、依据鱼的体形变化
健康的鱼，头小、背厚、肥满度好。病鱼则头大、眼凹陷、尾小、背窄、干瘪、肌肉薄。若水中重金属含量过高，就会使鱼体弯曲变形。
五、依据病鱼组织
鱼的病体是诊断鱼病的主要依据。每种病鱼都有其特殊的症状，需仔细观察、区别，以正确诊断鱼病。特别是有些症状相似的鱼病，尤需仔细辩认，找出其不同之处，如细菌性肠炎病与出血性肠炎病的区别、细菌性烂鳃与寄生虫引起的等。
六、依据鱼的栖息环境
不同类型的鱼发病条件不同，因而可据此协助诊断：例如肠炎、赤皮、烂鳃、打粉病等多发生在呈酸性的水环境中；中华鳋、锚头鳋、鱼鲺等寄生虫病多发生在弱碱性的水环境中；泛池现象多发生在缺氧的环境中。
七、依据季节变化
不同的鱼病有不同的发病水温，因此可根据不同的季节来区分某些鱼病。例如出血病发生在7~9月的高温季节；竖鳞病发生于开春；水霉病多发生在春初秋末季节水温在10~15℃，水温达到20℃基本就不再发生了。
八、依据鱼的生长阶段
如剑水蚤仅危害刚孵化一周的鱼苗。打粉病、白头白嘴病多发生在鱼苗阶段。赤皮病、打印病多发生在成鱼阶段。
九、依据寄主
不同的病原体所寄生的寄主也不同，肠炎、出血多发生在鲤、草鱼上；鲢、鳙等很少发病；中华鳋等只发生于鲢、鳙鱼上等。鲤疱疹病毒病只发生在鲤、鲫鱼。粘孢子虫多寄生在鲤、鲫鱼，而草鱼很少发生。
十、依据鱼病疗效
如果发生某类药物如抗菌素对某种鱼病完全没有作用，则要考虑病毒病或寄生虫病等。还依据鱼的生长状况，鱼体表、鳃等部位的分泌物，依据人为因素（如管理不善、施药不当、水质污染、农药流入、机械损伤等都有可能引发鱼病）进行诊断。
赏
共有人打赏4龙币
7410
大洁我来啦
66楼 2021/03/31
谢谢
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大洁我来啦
65楼 2021/03/30
养鱼的有福气了
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