How to Control Fish Stress Bleeding.

鱼应激性出血病是鱼对环境中异常的、不良的胁迫因子产生的一种非特异性、生理性紧张状态的一种反应，常表现为体表充血，肝胆异常，鳃出血或淤血呈现紫鳃的症状。

Fish stress hemorrhagic disease is a kind of non-specific and physiological stress state caused by abnormal and severe stress factors in the environment, presented as somatic hyperemia, hepatobiliary abnormalities, gill hemorrhage or congestion Gill symptoms.

 

一、症状

 

本病一般有三种典型的症状:肝胆综合病变、紫鳃、全身充血的出血病症状。

肝胆综合病变:患病鱼肝脏肿大，色泽变淡或土黄色。

紫鳃:掀开病鱼的鳃盖，可发现鳃部有大量的出血，甚至会有淤血，使鱼鳃呈紫色，可见鳃丝严重充血。

全身充血的出血病症状:患病鱼的上下颌、口腔、鳃盖、眼睛、鳍基及鱼体两侧均充血；肠壁充血。

 

1. The symptoms

 

The disease generally has three typical symptoms: hepatobiliary complex disease, purple gills, systemic congestion symptoms of bleeding.

Liver and gallbladder disease: fish liver enlargement, color fades or khaki.

Purple gills: open the fish gill cover, can be found in the gills have a lot of bleeding, and even congestion, so that the gills were purple, showing gill silk severe congestion, but the gill is very complete.

Systemic congestion symptoms: fish upper and lower jaw, mouth, gill cover, eyes, fin base and both sides of the fish are congested, intestinal congestion.

 

二、防治

 

针对本病目前尚无特别有效地治疗方法、一般采取预防为主、防治结合和生态防治的方法，以尽量减少本病的发生。

具体防治方法有以下几点:

1. 根据实际情况确定合理的放养密度以降低鱼对应激源的敏感性。

2. 加强养殖管理，经常加注新水，保持水质清新，还可定期使用生石灰或生物制剂化水全池泼洒改善水质，以增强鱼的抗应激能力。

3. 当鱼发生本病时，建议首先减少配合饲料的投喂量，适当增加植物性饲料的投喂量，其次用维生素和饲料级胆汁酸拌饵投喂，可以起到一定的治疗效果。切忌在此时随意用药，否则可能会导致越用药病情越严重、死亡越多，从而给养殖生产带来更大的损失。

 

2. Prevention and treatment

 

For the disease is currently no special effective treatment, generally take the main prevention, prevention and treatment and ecological control methods to minimize the incidence of the disease.

Specific control methods have the following:

1. According to the actual situation to determine a reasonable stocking density to reduce the sensitivity of fish to the source.

2. Strengthen the management of farming, often add new water, keep fresh water, but also regular use of quicklime or biologically formulated water to improve water quality, to enhance the fish's anti-stress ability.

3. When the fish occurs the disease, it is recommended to reduce the amount of compound feed, the appropriate increase in the amount of plant feed, followed by vitamins and feed grade bile acid as fed bait feeding, will play a certain therapeutic effect. Do not use drugs at this time, otherwise it may lead to more severe drug use, the more death, so as to bring greater losses to aquaculture production.