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1.
鳜鱼（Siniperca chuatsi）俗称季花鱼、桂花鱼,是淡水名贵鱼类。2000年以来．南湾水库开展鳜鱼网箱养殖生产,其亲鱼源自南湾水库．苗种自繁自育．没有发生过传染性疾病．但寄生虫病却时有发生．苗种培育阶段斜管虫危害较严重,曾发生大批死亡：养成阶段常遭受车轮虫、小瓜虫、斜管虫、指环虫、锚头鳋等及体内多种线虫的寄生．但很少发生死亡现象。 相似文献
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<正> 采用50～60ppm的福尔马林、0.2ppm的孔雀石绿和0.6ppm的敌百虫的混合物可以有效地杀灭鱼类的寄生原生动物,如斜管虫Chilodonella、口丝虫Costia、车轮虫Trichodina、小瓜虫Ichthyophthirius。处理后6小时寄生虫开始消失,而鱼的鳃部没有组织病理学变化。然而,福尔马林的浓度 相似文献
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鳜鱼苗种期鱼病较多，常造成鳜鱼苗大量死亡甚至全军覆没。2003-2006年大通湖地区鳜鱼苗种期常见的病原体有：水霉病，主要危害受精卵及刚孵出的鱼苗；车轮虫、斜管虫、杯体虫、聚缩虫、钟形虫、半眉虫、日本新鳋、中华鳋、鱼鲺、小划蝽等寄生虫病，危害较大的有车轮虫、斜管虫、杯体虫等；细菌性鱼病主要在鱼种期造成危害，对其流行病学和防治方法进行了初步研究。 相似文献
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<正> 在近三年进行鳜鱼池塘、湖泊养殖及苗种繁殖过程中,观察到鳜鱼在不同季节、水域和生长阶段患有斜管虫病、小瓜虫病、白皮病、车轮虫病、烂鳃病等近10种疾病,现将观察到的疾病症状及防治方法分述于后,为鳜鱼规模养殖进行科学防病治病提供参考。 相似文献
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一、鳜鱼养殖病害及防治1郾纤毛虫病(车轮虫、斜管虫、舌杯虫病)病因是由车轮虫、斜管虫、舌杯虫等寄生虫引起。具体症状表现为病鱼浮头靠近池岸,游动缓慢,口张开,体表呈灰白色,鳃丝呈灰白色、粘液多,并发烂鳃病,病重时鱼体失去平衡,上下浮动,最后导致死亡。此病在鱼种阶段危害 相似文献
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扁吻鱼鱼苗寄生虫病防治试验 总被引：2，自引：0，他引：2
2005年4～7月,在室内集约化培育扁吻鱼鱼苗期间,鱼苗相继受到多种寄生虫的侵袭。通过用甲醛、硫酸铜、氯化钠和硝酸亚汞等药物治疗。结果表明：水温16～19℃时硝酸亚汞治疗小瓜虫病的安全有效浓度为0.4～0.8 ppm。水温22～26℃时,为0.05 ppm；40 ppm-60 ppm福尔马林溶液可有效控制鞭毛虫和纤毛虫病；0.1 ppm硫酸铜10～15分钟有效杀灭纤毛虫。硫酸铜与硫酸亚铁合剂、氯化钠易引起鱼苗产生大量粘液而死亡。 相似文献
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不同药物对金鱼小瓜虫病的防治效果 总被引：10，自引：0，他引：10
研究了硝酸亚汞、孔雀石绿、亚甲基兰、福尔马林、硫酸铜与硫酸亚铁合剂、生姜和辣椒合剂对金鱼小瓜虫病的防治效果。试验结果表明,硝酸亚汞、孔雀石绿、福尔马林对金鱼小瓜虫病的防治效果较好,而硫酸铜与硫酸亚铁合剂质量浓度小于1 0mg/L时,不仅不能杀死小瓜虫,反而刺激小瓜虫胞囊的形成,加速繁殖。只有当其质量浓度达到1 2mg/L时,才能有效地杀灭小瓜虫。 相似文献
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杂交鲟稚鱼对几种药物敏感性的试验 总被引：2，自引：0，他引：2
对杂交鲟 (Husohuso♀×Acipenserruthenus♂ )进行几种药物 (高锰酸钾、硫酸酮、甲醛 )的敏感性试验 ,结果表明 :杂交鲟对三种药物的敏感性由强到弱依次为 :硫酸酮、高锰酸钾、甲醛 ;安全浓度分别为 :硫酸酮 0 0 1 2 7ppm ,高锰酸钾 0 0 71 0ppm ,甲醛1 1 9750ppm。 相似文献
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Yvonne Sadovy George Mitcheson Maria B. Rasotto 《Aquarium Sciences and Conservation》2001,3(4):253-263
The mandarinfish, Synchiropus splendidus, is a small, pelagic-spawning enthic dragonet of the western Pacific. Although popular in the marine aquarium trade, little
is known of its fishery or biology. All aquarium-trade animals are currently taken from the wild and the impact of heavy collecting
is unknown. The specialized and selective nature of the fishery for mandarinfish is described and its potential to disrupt
the mating system identified. As a possible alternative to wild capture and as an aid to sustainable exploitation, egg production
and early development relevant to mariculture are described, including egg output, embryo, larva and post-settlement development
to 30 days, based on live material. Egg output was determined for 40 females and ranged from 12 to 205 eggs. Embryo and larva
development were rapid, with settlement occurring within 14 days at 24–26 °C, and at 3.5 mm TL. The swimbladder is retained
in adults. Our limited attempts at raising the mandarinfish to settlement were encouraging and suggest an excellent potential
for mariculture with implications for both conservation and improved maintenance of fish in captivity. At present, given that
this species is difficult to maintain in captivity, it is only suitable for experienced aquarists. Preliminary diet information
is provided.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
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多种接种途径对翘嘴鳜细菌性烂鳃和败血症的免疫预防效果 总被引：6，自引：0，他引：6
多种接种途径对翘嘴鳜细菌性烂鳃和败血症的免疫预防效果陈昌福，周文豪（华中农业大学水产学院，武汉４３００７０）陈昌福等（１９９５）先后用从患细菌性烂鳃病的翘嘴鳜（ＳｉｎｉｐｅｒｃａｃｈｕａｔｓｉＢ．）上分离的柱状嗜纤维菌（Ｃｙｔｏｐｈａｇａｃｏｌｕｍｎ... 相似文献
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双抗对紫彩血蛤幼虫发育的影响 总被引：1，自引：0，他引：1
本文研究了青霉素钾盐和硫酸链霉素(双抗)混合使用对紫彩血蛤(Nutallia olivacea)幼虫发育的影响。结果表明:1～80ppm的双抗均有很好的抑菌效果,均可显著地提高幼虫的存活率,最高可提高52％,最低也可提高38％,同时对幼虫生长和变态均有明显的促进作用。其中以2～4ppm效果最好,幼虫生长最快,变态率最高;高浓度组对幼虫也无明显的副作用,幼虫生长速度、变态率和存活率也都高于对照组。 相似文献
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Abstract. Formalin is an effective fish chemotherapeutant which is used to control certain ectoparasitic and bacterial infections. It is toxic to fish and its pathological and physiological effects have been reported. An experiment was conducted to elucidate the possibility of retention of formaldehyde in the muscles of two tropical food fish species, following exposure to therapeutic levels of formalin. The results indicated that Puntius gonionotus (Bleeker), retained 5·75 ppm formaldehyde following exposure to 50 ppm formalin for 24h. In contrast, Clarias batrachus (L.) retained 14·03 ppm and 18·72 ppm formaldehyde following exposure to formalin at 50 ppm and 100 ppm for 24 h respectively. However, no formaldehyde was detected after keeping the exposed fish in clean running water for 24h. 相似文献
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Abstract. Tests were performed to measure the efficacy of formalin in reducing peritrichous ciliates on the surface of cultured marine shrimp. The tests were conducted at concentrations above and below those being used in shrimp culture and were designed to define the concentration providing the most effective rapid reduction of ciliates. Penaeus stylirostris Stimpson,'preconditioned' in a single large tank, were divided equally (after diagnosis of significant ciliate epifaunation) into ten 1000 litre fibreglass tanks; each received 235 shrimp of 10–15 g average weight. These tanks were divided into five treatments: 0, 12·5, 25, 50 and 100 ppm; two replicates per treatment. Treatments were conducted under static conditions for 4 h. Ciliate levels were measured on day 0 (pretreatment) and days 1, 2 and 7 post-treatment. Formalin at 25, 50 and 100 ppm was demonstrated to be effective in reducing ciliates, while 12·5 ppm did not differ from the control (0 ppm). In addition, the higher the level of formalin used (within the effective range), the more pronounced was the initial ciliate reduction and the longer was the protection from further ciliate epifaunation. 相似文献
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南方大口鲶仔鱼的生长和摄食的初步研究 总被引：1，自引：0，他引：1
本文研究了南方大口鲶仔鱼的生长和摄食。研究结果表明,南方大口鲶仔鱼在0～15日龄内,全长与日龄之间呈线性相关,L=4．5849＋1．7892T（r=0．9942）,体重与日龄呈幂函数相关W=3．2664e0．3221T（r2=0．9783）。个体之间的生长差异较为明显,变异系数由0日龄的5．59升至15日龄的9．95,目增量率随日龄的增长呈双峰抛物线下降曲线,8～13日龄仔全对鲤鱼水花和水丝蚓的援食系数分别为4．76和4．02,对鲤鱼的摄食强度较高。通过对南方大口鲶生物学习性观察,发现其仔鱼具有明显的负趋光性和昼夜摄食节律,对饵料生物的选择依消化器官和游泳器官的发育程度依次为轮虫、桡足类幼体──枝角类、桡足类──水丝蚓和家鱼水花。 相似文献
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鳜传染性脾肾坏死病毒（ISKNV）是近年来危害广东地区鳜养殖业的主要病原，本文用回接感染健康鳜获得病毒原料，分离纯化了大量高纯度的ISKNV病毒粒子，电镜下可见病毒粒子为二十面体，直径平均为150mm，抽提病毒核酸，对其基因组DNA进行酶切分析，病毒基因组为双链DNA分子，表现脊椎动物虹彩病毒基因组的特点即其胞嘧啶5′端高度甲基化，以限制性内切酶EcoRI、BamHI、HindⅢ、KpnI和PstI酶切ISKNV基因组DNA，经电泳分离后，分别得到1、8、9、18、22条清晰的酶切片段，并根据酶切片段算得基因组的大小超过108.7kbp。 相似文献
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Antonín Kouba José Manuel Carral Miloš Buřič Jan Mráz Tomáš Policar Pavel Kozák 《Aquaculture Research》2010,41(10):e618-e623
There is little information on the long‐term artificial incubation of noble crayfish eggs. The present study evaluated artificial incubation in a partially recirculating system using formaldehyde baths as antifungal prophylaxis. Crayfish eggs were treated three times a week in a formaldehyde bath of 3000 ppm for 15 and 20 min and in 2500 ppm for 15, 20 and 25 min. In all treated groups, high final survival rates (87.8–92.0%) to stage 2 juveniles were obtained after 83 days. Significantly lower survival was observed in the control group (45.4%). It was concluded that recirculating systems can be used successfully for artificial incubation of crayfish eggs in order to conserve water. Formalin was found as an effective fungicide but its use should be carefully considered because of its safety issues for farm staff and environmental pollution. 相似文献