共查询到20条相似文献，搜索用时 178 毫秒
1.
2.
我校2．5亩实验鱼池，1985年6月4日发生青、草鱼肠炎病、烂鳃病、赤皮病并发症。当天死青鱼3尾、草鱼5尾，第二天又死青鱼8尾、草鱼11尾，我们当即投喂六合剂药饵，第三天病情被控制，死鱼明显减少，仅死青鱼2尾、草鱼4尾，第四天到第五天停药后一直未见死鱼现象， 相似文献
3.
4.
秋季草鱼、青鱼易发生肠炎、烂鳃、赤皮等病。首先要抓好预防工作,用生石灰、强氯精等消毒水体;其次是不要投喂霉变饲料,投喂青料要用漂白粉消毒后再投喂。若发现亲鱼患病,应及时诊断,对症治疗。一、细菌性肠炎病青鱼肠炎有两类病原:一是寄生虫,危害最大的为艾美球虫;一类是细菌,细菌性肠炎对青鱼危害很大,尤其对当年草鱼、二龄青鱼更严重,有的鱼池死亡率高达90%以上。 相似文献
5.
1 防治鱼烂鳃病和肠炎病
每100kg鱼用大蒜素10ml,拌入饵料中投喂,3天为1个疗程;或每100kg鱼每天用10％人工合成大蒜素200g拌饵投喂,连喂6天。 相似文献
6.
用鳜鱼、广东鲂、青鱼三种优质鱼类为试验材料，在不同浓度分子氨试液里暴露72h后，转移到含烂鳃病致病菌的试液里感染72h；试验结果表明，三种鱼经过分子氨致毒后在烂鳃菌感染下，发生不同程度的烂鳃病，NH3－N浓度0．190和0．252mg/l两个浓度72h的感染率达100％；72h 0.159mg/l(NH3-N)是诱发三种池养优质鱼类烂鳃病的临界值。 相似文献
7.
分子氨诱发池养鱼类烂鳃病的研究 总被引：2，自引：0，他引：2
用鳜鱼、广东鲂、青鱼三种鱼为试验材料,在不同浓度分子氨试液里暴露７２ｈ后,转移到含烂鳃菌的试液里感染７２ｈ,试验结果表明：三种鱼经过分子氨致毒后在烂鳃菌感染下,发生不同程度的烂鳃病,ＮＨ３－Ｎ浓度０．１９０ｍｇ／Ｌ和０．２５２ｍｇ／Ｌ两个浓度７２ｈ的感染率达１００％;７２ｈ０．１５８ｍｇ／Ｌ（ＭＨ３－Ｎ）是诱发三种池养鱼烂鳃病的临界值。 相似文献
8.
一、对发生草鱼细菌性烂鳃、赤皮，肠炎“三病”的鱼池全池遍洒生石灰，浓度为30～40PPm，4小时后，再喷洒含90％晶体敌百虫(0．3-0．5PPm)和食盐(3—5PPm)的合剂溶液。用法是先用水将敌百虫化开，再掺入食盐搅匀，制成浓缩液，装入喷雾器内，半桶药液半桶清水，喷洒全池。第二天再投喂敌百虫和食盐合剂药饵，每百斤鱼用敌百虫50-100克，食盐0．75公斤。 相似文献
9.
10.
几年来，我分场在培育夏花鱼种方面，为如何节省商品饲料，用青饲料代替精饲料，以猪粪大草混合堆肥代替黄豆浆培育夏花鱼种取得了一些成绩。1975年到1977年，三年跨了三大步。过去培育每万尾夏花鱼种要消耗黄豆25斤以上。1975年消耗15斤，1976年消耗10斤，1977年减少到只有6．9斤，比初期节省了好几倍。其中，最省的养鱼组，培养每万尾复花鱼种消耗饲料只用2斤。 相似文献
11.
2012年5-10月,在面积为0.19hm2的试验池1中放养体质量160g的松浦镜鲤（Cyprinus carpio Songpu）117,700尾·hm^-2,混养体质量160g的长丰鲢（Hypophthalmichthys molitrix）春片、乌子头和鳙（Aristichthys no-bilis）夏花鱼种。在面积为0.19hm2的试验池2中放养体质量149.5g的松浦镜鲤3,450尾·hm^-2,只混养鲢和鳙夏花,采用常规饲养方法。2012年10月2日,试验池1平均每hm2产鱼21,025.5kg,其中松浦镜鲤平均全长34.3cm,体质量1425g,产量18,294.0kg;长丰鲢春片平均体质量674g,平均产量1,816.5kg,长丰鲢夏花平均全长18.6cm,体质量112.4g,平均产量592.5kg;鳙夏花平均全长达12.1cm,体质量39.9g,平均产量322.5kg。试验池2平均每hm2产鱼3,069.0kg,其中松浦镜鲤平均全长35.0cm,体质量1225g,平均产量2,766.0kg;鲢夏花平均全长达11.3cm,体质量24.9g,平均产量130.5kg;鳙夏花平均全长达11.1cm,体质量35.1g,平均产量172.5kg。试验表明,高密度养殖的松浦镜鲤产量显著高于密度低时,长丰鲢夏花的出池体质量是普通鲢的4.5倍,特殊生长率（6.27%·d^-1）是普通鲢（3.5%·d^-1）的1.79倍。文中还讨论了松浦镜鲤养殖池的水质和技术特点。 相似文献
12.
Patricia S. Gaunt Richard G. Endris Lester Khoo Rebecca Howard Anissa L. McGinnis Timothy D. Santucci Terry Katz 《Journal of the World Aquaculture Society》2004,35(2):257-267
–A dose titration study was conducted to determine the appropriate dosage of florfenicol in feed to control mortality in channel catfish Ictalurus punctatus associated with enteric septicemia of catfish caused by Edwardsiella ictaluri. Six tanks (20 fish/ tank) were assigned to each of the following treatment: 1) not challenged with E. ictaluri and fed unmedicated feed; 2) challenged with E. ictaluri and fed unmedicated feed; 3) challenged and fed 5-mg florfenicol/kg body weight (kg bw); 4) challenged and fed 10-mg florfenicol/kg bw; or 5) challenged and fed 15-mg florfenicol/kg bw. Treatment was initiated the day after inoculation, and feed was administered by hand at 2.5% body weight for 10 consecutive days. Feeding activity was scored for all groups and was noted to be significantly less than the challenged, unmedicated group. Cumulative mortality in the challenged untreated group was 60%. The mortality in the unchallenged untreated group was 0%, and in die 5-, 10-, 15-mg florfenicol/kg bw group was 2.5%, 0.8%, and 2.5%, respectively. The mortality in each challenged, treated group and the non-challenged control group was significantly less than the challenged, unmedicated controls (P < 0.0001 for each contrast). There were no pairwise statistically significant contrasts among the florfenicol treated groups and the non-challenged control group. All 600 fish in the study were necropsied, cultured for bacteria, and examined by gross pathology. No specific lesions that could be associated with the antibiotic were observed. The efficacy of the 10 mg/kg dosage was confirmed in a separate dose confirmation study. In this study, fish in 30 tanks (20 fish/ tank) were infected with E. icraluri by immersion. Two days post-inoculation, fish in 15 tanks were hand-fed unmedicated feed, and 15 tanks were hand-fed medicated feed at a dosage of 10-mg florfenicol/kg bw at 2.5% body weight for 10 d. Feeding activity was scored and was noted to be significantly less than the challenged, unmedicated group. Cumulative mortality in the florfenicol group (14%) was significantly less than cumulative mortality in the untreated group (87.3%) (P < 0.0001). All 600 fish were submitted for bacterial culture, necropsied. and examined for gross pathology, and once again, no specific lesions that could be associated with the antibiotic were observed. The minimum inhibitory concentration of florfenicol against E. ictaluri in both studies was 0.25 ug/mL. Florfenicol was palatable, safe, and efficacious for control of mortality due to infection by E. ictaluri in catfish. 相似文献
13.
Abstract. Outbreaks of sanguinicoliasis have been reported from several carp, Cyprinus carpio L., farms in Britain since 1978. The parasitic agent, Sanguinicola inermis Plehn, 1905, affects young of the year carp in nursery ponds. In the outbreak studied mortality as high as 90% occurred within the first 2–3 months of life. The prevalence of infection in surviving fish was 74% and their growth performance was measured over a period of 16 weeks under optimum aquarium conditions. The fish showed a poor growth performance with depressed specific growth rates and daily live weight gain. Food utilization, food conversion rates and protein efficiency ratios were inferior in both lightly and heavily infected groups of fish. A further 30% mortality occurred in the heavily infected group during the experiment, 14 months after the initial infection, indicating serious long-term effects of the parasite. There appears to be little value in retaining infected fish and complete destruction of affected stocks and disinfection of the farm is recommended where possible. 相似文献
14.
本文报道了1985-1987年在崇明县新民第三水产养殖场对鲤鱼棘头虫病的病原、症状及治疗方法的研究结果。该病可引起鲤鱼自夏花至成鱼大批死亡，全场感染率在70％以上；发病严重的鱼池则感染率高达100％，死亡率高达60％．病鱼肠壁上形成肉芽肿结节，严重时能使内脏粘连，甚至体壁溃烂和穿孔。病原是崇明长棘吻虫(新种）Rhadinorhynchus chongmingnensis sp.nov.。扫描电镜观察，吻上布满细毛。有吻钩14纵行，每行29～32个吻钩，粘液腺8个。治疗方法为每天每公斤鱼拌饵投喂0．6毫升四氯化碳，连服6天，效果良好． 相似文献
15.
夏花青鱼饵料中的最适蛋白质含量 总被引：15，自引：0，他引：15
用酪蛋白、结晶氨基酸、鱼肝油、糊精、纤维素粉等加上适量的维生素、矿物混合剂所组成的精制饵料，以青鱼夏花为试验对象，经过八个星期的喂养试验，从生长、增重和饵料利用率等指标来评定，青鱼夏花的最适蛋白质含量应为41％。蛋白质含量太高，反而减慢生长，降低成活率，同时似乎还对鱼类有毒害影响。蛋白质含量较低，虽然能很好地利用蛋白质，但鱼生长缓慢。6％以下的蛋白质含量甚至出现减重现象。根据本次试验结果，可以认为二龄青鱼和老口青鱼应用饵料中蛋白质的含量为33％和28％是适当的。 相似文献
16.
S. E. Papoutsoglou G. Mylonakis H. Miliou N. P. Karakatsouli S. Chadio 《Aquacultural Engineering》2000,22(4):565-318
Growth performances and physiological responses of Cyprinus carpio after long-term (14 weeks) background color adaptation were investigated. Six groups of ten individuals each (initial body weight 116 g) were reared in black, green and white tanks (two replicate groups for each color). At the end of the experiment, blood (cortisol, glucose, haematocrit, cholesterol, triglycerides, total lipids, osmolality, electrolytes, pCO2, pH), liver (total lipids, glycogen, hepatosomatic index) and growth (body weight, specific growth rate, food conversion ratio, condition factor, proximate carcass composition) parameters were determined. Plasma cortisol levels in white-adapted carp were significantly (P<0.05) lower than those in black, while in green-adapted fish did not differ significantly from those in both other counterparts. White-adapted carp showed the highest specific growth rate and the lowest food conversion ratio, whereas black-adapted fish exhibited the opposite pattern. In addition, mean (%) increase of body weight in white-adapted carp was 4.66 and 3.58% higher than that in black- and green-adapted fish, respectively. Furthermore in white-adapted carp, blood pCO2 and pH were significantly higher and lower, respectively, than those obtained in black- and green-adapted fish. In black-adapted carp, liver total lipid levels were significantly lower, and plasma total lipid levels were significantly higher, than those in white- and green-adapted fish. No significant variations were observed in the other parameters. It is concluded that different background colors may lead to different growth performances of scaled carp depending upon rearing conditions. 相似文献
17.
Sergei Gorshkov Galina Gorshkova Barbara Colorni Hillel Gordin 《Journal of the World Aquaculture Society》2004,35(2):167-177
To produce a monosex female population of European sea bass Dicentrarchus labrax, fry were fed dry diets containing dosages of 12.5, 25, and 50 mg/kg food of either the natural estrogen estradiol-170β(E2) or the synthetic estrogen 17α-ethynylestradiol (EE2) for 60 d starting at 88 d post-hatch (dph). A complete feminization (100%) was achieved in all E2-treated groups at the age of 11 mo (330 dph). All affected fish had ovaries similar in size and histological structure to those of control females. In the E2-treated groups, feminized fish were heavier and longer than untreated controls (males and females combined). In control groups females exhibited significantly higher body weight and total length than males. Untreated females from control groups and females from the group treated with E2 at 12.5 mg/kg food had similar body weight, suggesting that in sea bass growth is related to phenotypic sex. In the Entreated groups, survival rates were similar to those of the control fish. A relatively high percentage of females was obtained in the EE2-treated groups (from 38.6 to 96.5%). However, the gonadal development in these fish was significantly suppressed and a dose-dependent reduction of gonadal sizes was evident. Treatments with the EE2 (12-5, 25, and 50 mg/kg food) resulted in many fish having abnormal (2.9-5.4-39.8%, respectively) and sterile (0.6-6.0-21.6%, respectively) gonads. Effects also included significantly lower weight and shorter length when compared with controls. Furthermore, fish fed with EE2 at the dosage of 50 mg/kg food had high mortality rate. A simple protocol was developed for the complete feminization in sea bass in which the fry (80-100 dph) were fed to satiation two times daily with a diet containing 12.5 me of E2/ks food for a period of 60 d. 相似文献
18.
以枯草芽孢杆菌为主的主要用于促进鱼类消化生长的微生态制剂I、多种混合微生物主要用于调节水质的微生态制剂II,或是两者混合使用的方法,比较研究了黑龙江省及辽宁省池塘养殖的鲤（Cyprinus carpio）、鲫（Carassius auratus）和草鱼（Ctenophyargodon idellus）的增重率、饲料系数及药价等效益。结果表明,单种或者混合使用微生态制剂均对池塘养殖鲤及草鱼的增重率、饵料系数及用药价格有一定影响,同时使用两种微生态制剂提高鱼类增重率最显著,辽宁省和黑龙江省分别提高了423.57%和90%;而两省养殖池塘的药价也分别降低了29%和56.25%。微生态制剂I及混合同时使用两种微生态制剂均能显著降低饲料系数,辽宁及黑龙江分别降低0.35及0.05。结果可见,适当使用微生态制剂对辽宁草鱼及黑龙江池塘养鲤效益有较好影响,对减少用药、发展绿色养殖业具极大的推动作用。 相似文献
19.
Corazon B Santiago Angelito C Gonzal Emiliano V Aralar & Renato P Arcilla 《Aquaculture Research》2004,35(9):836-841
The study was conducted to determine if stunting of young bighead carp Aristichtys nobilis (Richardson) would affect subsequent growth and reproduction. Juveniles (3 g each) were stocked directly in cages (control) in a lake or stunted in tanks for 6, 12, 18 or 24 months before being stocked in cages. Initially, body weights and lengths of stunted carp in cages were significantly lower (P<0.05) than those of the control fish. The carp stunted for 6, 12 and 18 months showed growth compensation, although their weights and lengths were slightly lower than those of the control fish. The body weight and length of fish stunted for 24 months were the lowest throughout the rearing period. Sexual maturation occurred only in the control fish and those stunted for 6 and 12 months. However, the onset of gonad maturity was delayed significantly (P<0.05) in males stunted for 12 months and in both groups of stunted female fish. The relative fecundity (44 000–56 000 eggs per kg body weight) and number of 3‐day‐old larvae produced per female (78 000–89 000) did not differ significantly among the three treatments (P>0.05), but production was somewhat lower in fish stunted for 12 months. 相似文献
20.
Abstract. Cyprinid herpesvirus 1 (CHV) or Herpesvirus cyprini was virulent for carp, Cyprinus carpio L., fry following 1 h immersion in water at 20 °C. Cumulative mortality for carp fry was 86–97% in 2-week-old common carp, 20% in 4-week-old fancy carp, and 0% in both 8-week-old common and fancy carp. The virus did not produce mortality in fry of crucian carp, grass carp or other cyprinids. It was also oncogenic in carp, inducing papillomas to the extent of 55% among both common and fancy carp fry. The neoplasms appeared 5–6 months after carp had been exposed to the virus by immersion and recurred at an incidence of 83% in carp 7·5 months post-desquamation of the tumour. The CHV was reisolated from all moribund fish and from all survivors. It also induced papillomas at an incidence of 13% in adult mirror carp and at 10% in adult fancy carp 5 months after intraperitoneal inoculation of 105 TCID50 ml-1 fish. The virus was rcisolated only from the ncoplastic tissue and not from internal organs. The neoplasms were normally located on fin, skin or mandible, at the intraperitoneal inoculation site. Specific fluorescence for CHV antigen was frequently detected in the gills, liver, kidneys and intestine of 2-week-old fry from 3 to 21 days following challenge with CHV. It was found in greater concentrations in experimentally induced papillomata on 2-week-old carp fry survivors examined 24 weeks after challenge than in naturally occurring neoplasms. 相似文献