论文部分内容阅读
我区自1990年开始罗氏沼虾试养,现已推广1200余亩,最高单产312公斤。经过近几年的经验总结,发现该虾有如下几种常见疾病,在此做一简介,供广大养殖者参考。一、纤毛虫病:1.原病和症状:许多纤毛虫如累枝虫、聚缩虫、单缩虫、钟形虫等附着在虾的体表附肢、眼和鳃上。虾常显得烦躁不安,阻碍摄食蜕皮,在鳃上大量出现时,引起缺氧死亡。2.防治:此病主要发生在池塘水质不洁,含有机质多的水体,故保持水质清洁是最有效的方法。(1)适量投饵,保持水质清新。
My district since 1990, Macrobrachium test, now has more than 1200 acres, the highest yield of 312 kg. After several years of experience and concluded that the shrimp have the following several common diseases, make an introduction here, for the majority of farmers for reference. First, the ciliate disease: 1. The original disease and symptoms: Many ciliates, such as the tribulus, polycyclic worm, monotermes, bellies and other attached to shrimp surface appendages, eyes and gills. Shrimp often seem restless, obstructing feeding molting, a large number of gills, causing hypoxia death. 2. Prevention and treatment: The disease occurs mainly in the pond water quality is unclean, with organic matter and more water, so to maintain water quality is the most effective way. (1) the amount of feeding, to maintain fresh water.