暗纹东方鲀养殖常见疾病及防治方法

本人从2000年开始对我县的暗纹东方鲀养殖过程中的疾病防治进行探索,取得了较好的效果,使本县暗纹东方纯的养殖成活率高达91％以上,现将我们的诊治方法介绍给大家,以供参考。     

红鳍东方鲀异沟虫病的诊断与防治

2003年5月间,宁德市三都镇一家网箱养殖的2万多尾红鳍东方魨发生大量死亡,规格都在300克左右,病情发展十分迅速,从刚发病开始只有几百尾,经过2～3天,50％以上都发病,而且     

福尔马林药浴防治红鳍东方鲀异沟虫病的研究

异沟虫是红鳍东方鲀常见寄生虫之一,对红鳍东方鲀养殖业危害极大.为有效防治异沟虫病,在观察异沟虫虫卵孵化规律的基础上,研究评价福尔马林药浴对异沟虫的杀灭效果及其对红鳍东方鲀的安全性,形成红鳍东方鲀异沟虫病的防治方案.试验结果发现,异沟虫虫卵的孵化过程大致可分为孵化初期、孵化中期、孵化后期和破卵4个阶段,在17～19℃条件...     

锚头鳋的测报与防治方法

锚头鳋病持续期长,一年四季都可发生,夏秋两季最为严重:鱼体表面锚头鳋可导致病鱼翘尾闹塘,烦躁厌食,最后暴发死亡。测报锚头鳋繁育动态,掌握最佳防治适期,科学选择和标准使用药物,是防治锚头鳋病的有效方法。12002年测报2002年3月中下旬日平均气温比常年高出2～3℃,4月中旬,出现长时间低温阴雨,寡光照,气温比常年偏低,锚头鳋越冬代产卵提前,卵期延长,童虫期不集中。2002年测报结果与预报十分接近。3月中旬,有10天累计52小时的长日照,3月下旬,日平均气温升至14.5℃,比常年高出2.2℃,锚头鳋4月5日开始产卵,比常年提前5天。4月上中旬出现连续2…     

河鲀鱼网箱养殖技术

<正> 随着日本、韩国等国家河鲀鱼需求量的逐渐增加,我国河鲀鱼养殖的规模也随之加大。但是,许多问题也日趋明显,如:鱼塘使用费过高、水质交换不及时,饵料投喂不当等。要解决上述问题,进行海上网箱养殖势在必行。本人将几年来进行海上网箱养殖河鲀鱼的经验简述如下。     

河Tun鱼网箱养殖技术

随着日本、韩国等国家河鲀鱼需求量的逐渐增加,我国河鲀鱼养殖的规模也随之加大。但是,许多问题也日趋明显,如:鱼塘使用费过高、水质交换不及时,饵料投喂不当等。要解决上述问题,进行海上网箱养殖势在必行。本人将几年来进行海上网箱养殖河鲀鱼的经验简述如下。     

Metabolomic investigation of pathogenesis of myxosporean emaciation disease of tiger puffer fish Takifugu rubripes

Serum biochemical analysis was undertaken to study the pathophysiological details of emaciation disease of the tiger puffer fish Takifugu rubripes (Temminck and Schlegel). Serum parameters were measured by biochemical analysis using automated dry chemistry and gas chromatography/mass spectrometry (GC/MS). Serum concentrations of albumin, amylase, calcium, creatinine, glucose and total protein were significantly lower in the emaciated fish when compared with those of normal fish. Regression analyses found close correlation between concentrations of total protein, albumin, amylase, glucose and progress of the disease. In contrast, serum alanine aminotransferase increased significantly in emaciated fish indicating liver function disorder. Further, GC/MS metabolic profiling of the puffer serum showed that the profile of the emaciated fish was distinct to that of non‐infected control. The serum content of amino acids including glycine, 5‐oxo‐proline and proline, and ascorbic acid, fumaric acid and glycerol increased significantly in serum in moderately emaciated fish. The serum glucose, linolenic acid and tyrosine level decreased significantly in the late phase of the disease. Our results clearly show that prolonged intestinal damage caused by myxosporean infection impairs absorption of nutrients, resulting in extreme emaciation.     

河豚鱼与日本对虾混养技术

<正> 为了综合利用养殖水体资源,近一二年来,我县沿海部分池塘实行河豚鱼与日本对虾混养的增产措施。日本对虾以河豚鱼残饵、粪便为饵料,既提高了饵料利用率,又有利于水环境的安全稳定;河豚鱼能够将患病害的虾吃掉,防止疾病蔓延,且其体表分泌的粘液能够抑制水中病菌的滋生;由于日本对虾的昼伏夜出,故二者的活动与摄食基本上互不影响。所以,河豚鱼与日本对虾能够互利共生,大大提高生产效益。生产实践表明,除河豚鱼的养殖收入,混养的日本对虾每667m~2单产15～25kg,产值在1000元以上。现将混养技术介     

网箱养殖河鲀新技术

<正> 网箱养殖河鲀具有机动、灵活、简便、水域适应广、操作简单等优点。1 养殖水域 选择避风向阳、环境安静、水质清新、无污染物、无障碍物、水面宽阔、日照条件好的水域作网箱养殖水域。网箱的箱底离水底要有0.5m以上高的距离,防箱搁浅。设置网箱的水域     

对虾池中混养河豚效果好

<正> 1993年暴发虾病以来,水产界不断地采取措施进行虾病防治,力图重振养虾雄风。2000年我们进行了中国对虾养殖池中混养河豚鱼的试验,通过混养河豚鱼改善生态环境摄食弱病虾、切断传播途径,防止虾病在对虾池中的蔓延,达到了防病增产增收的目的,现将有关过程简单介绍如下,以供大家参考。 1 清池 虾池进水一个月前,进行清池翻耕,凉晒,每667m~2施生石灰50～75kg。 2 设置围网     

河豚鱼烤鱼片安全生产技术研究

为了充分利用河豚鱼资源,本文对河豚鱼烤鱼片的安全生产技术进行了研究。河豚毒素在河豚鱼体内分布是不均匀的,在加工过程中要将毒素含量高的部分去除。研究表明经过加工的河豚鱼烤鱼片是安全的,对人体无任何毒害作用。     

Toxicity of cultured puffer fish and seasonal variations in China

To confirm the toxicity or the tetrodotoxin (TTX) content of cultured puffer fish in China, 565 specimens of cultured puffer fish (Takifugu rubripes, Takifugu fasciatus or Takifugu obscurus, Takifugu flavidus and Takifugu bimaculatus) were collected from five provinces from November 2007 to November 2008. The toxicity of the skin, muscle, liver and testis/ovary was examined using methods based on a mouse assay for TTX. The results indicated that the skin, muscle, liver and testis of specimens were ‘non‐toxic’ in both of the mouse assays [<10 mouse unit (MU) g^?1 or 2.2 μg g^?1] from the viewpoint of food hygiene. However, TTX was detected from an ovary sample of the cultured T. rubripes collected from the Shandong province in March 2008, which was 125.43 MU g^?1 tissue. The average TTX contents in the muscle, liver and skin of T. rubripes from Hebei and Shandong provinces were the highest in May or July (1.31, 0.90 and 0.62 MU g^?1, respectively, in Hebei, and 1.57, 0.32 and 0.16 MU g^?1, respectively, in Shandong) and the lowest in January (<0.1 MU g^?1 or 0.02 μg g^?1). Thus, non‐toxic cultured puffer fish could be produced successfully in mainland China.     

河鲀鱼养殖疑难病的诊断与治疗

在日本,由于近几年河鲀鱼病害发生的复杂性,给河鲀鱼养殖带来相当的危害。原本在养殖业中具有相当水准和经验的养殖业者,也为目前所遭遇河鲀鱼复杂病害的侵扰而无奈。本文以2004年在三瓶湾海域所发生的河鲀鱼养殖病害的诊断为例,做如下叙述。