日本对虾仔虾的温度适宜性实验研究   总被引：7，自引：1，他引：7  

李润寅  陈介康  姜洪亮  于深礼  王建芳 《水产科学》2001,20(3):17-18

日本对虾 (Penaeusjaponicus)仔虾体全长 (11 7± 1 0 )mm ,分别置于 2 4,2 0 ,18,16 ,14 5 ,13℃水槽中培养 ,经 10d观察的结果 :仔虾成活率与水温呈负相关 ,依次为 0 12 ,0 2 8,0 39,0 5 3,0 5 3,0 6 0 ;长度增长率与水温呈正相关 ,依次为 0 2 7,0 19,0 12 ,0 0 9,0 0 4,0 0 1。认为仔虾放流海区水温应 >16℃。  相似文献   

中国对虾卵巢发育过程中脂肪酸组成的分析及比较研究   总被引：5，自引：0，他引：5  

季文娟  徐学良 《海洋水产研究》1992,(13):7-12

通过分析中国对虾亲虾在卵巢发育的不同阶段的卵巢、肝胰脏和肌肉的脂肪酸组成来评估中国对虾在性腺成熟过程中对脂质的需要。从中国对虾亲虾不同组织的脂肪酸组成可见,棕榈酸(16:0)、棕榈油酸(16:1ω7)、油酸(18:1ω9)、二十碳五烯酸(20:5ω3,EPA)及二十二碳六烯酸(22:6ω3,DHA)占主要比例,这与其它海洋甲壳类的脂肪酸组成相类似。中国对虾亲虾的主要脂肪酸组成比例与日本对虾亲虾的主妥脂肪酸组成比例相近似。中国对虾亲虾在不同的卵巢成熟期同一器官中的主要脂肪酸组成比例没有明显的差别,而不同组织的主要脂肪酸组成中都含有大量的ω-3系列的高度不饱和脂肪酸。从成熟卵巢的脂肪酸组成中含有高比例的EPA、DHA含量可见,EPA、DHA在亲虾性腺发育过程中的必需性。  相似文献   

低盐水体南美白对虾与鲢鳙鱼混养的试验   总被引：8，自引：1，他引：8  

王吉桥  罗鸣  马成学  张玉满  于晶 《水产科学》2003,22(6):21-24

在6口低盐淡水(盐度2～10)池塘中放养体长0 8～1 0cm的南美白对虾(Penaeusvan namei)(30万尾/hm2),其中三口塘再放养鲢(Hypophthalmichthysmolitrix)、鳙(Aristichthysno bilis)夏花(体长2 0～3 0cm)(1500尾/hm2,鲢:鳙=1:1)。鱼、虾分别精养90d和60d。混养池塘中对虾的成活率(24 6%)为单养池(9 1%)的2 7倍,产量(800 0±86 7)kg/hm2为单养池的3 2倍;鱼产量为(93 9±7 9)kg/hm2,鳙的出塘规格大于鲢,产量高于鲢。混养池塘水中氨氮、亚硝态氮和溶解氧含量低;透明度和活性磷含量高;pH值波动幅度小。  相似文献   

对虾育苗期间幼体真菌感染的调查与初步分析     

单红云  齐跃才  王一平  周影  李曰忠  陈军昌  安永菊 《水产科学》2002,21(3):18-19

2001年，营口地区对虾育苗期间幼体发生了严重的真菌病害，为了掌握和了解本地区对虾育间苗体真菌感染流行的规律，给今后对虾育苗防治真菌病提供参考，对3家对虾育苗场的发病情况进行了真菌感染的调查与菌体分离培养，认为此次感染流行为垂直传播病源来自种虾及其卵块。  相似文献   

维生素B1对中国对虾生长影响的研究   总被引：2，自引：0，他引：2  

徐志昌  李爱杰 《齐鲁渔业》1994,11(3):26-29

研究了中国对虾饵料中维生素Ｂ１的适宜含量，当１００ｇ饵料含６ｍｇＶｂ１时，中国对虾增长率和存活率最高；ＶＢ１缺乏或过量，都影响对虾的生长和存活，ＶＢ１在对虾组织中的含量随饵料中ＶＢ１含量的增加而增加，以６ｍｇＶＢ１／１００ｇ饵料最高，如过量欺一反而降。ＶＢ１可影响对虾肝胰脏α－淀粉酶的活性，当１００ｇ饵料含６ｍｇＶＢ１时，这种酶活性最高，对虾生长也最好。  相似文献   

高锰酸钾防治对虾幼体聚缩虫病的研究     

王印庚  韩阿寿 《海洋水产研究》1992,(13):48-53

在对虾育苗期间,以选择施用0.5ppm和1ppm高锰酸钾、换水补药的方式为预防措施,以泼洒2～4ppm高锰酸钾短期药浴为应急治疗方法,连续2年在对虾育苗生产中取得了抑制和杀灭聚缩虫病成功率为100％,每立方水体生产15～25万尾仔虾的良好效果。育苗水体长期施用0.5～1ppm高锰酸钾对对虾幼体、单胞藻、卤虫无毒害作用,对微粒饵料、水质因子亦无不良影响。高锰酸钾施用方便,成本低廉,投入成本只占万尾虾苗售价的万分之一左右,便于在大生产中推广应用。  相似文献   

Infection and mortality of Penaeus vannamei at extreme salinities when challenged with Mexican yellow head virus     

Navarro-Nava F  Castro-Longoria R  Grijalva-Chon JM  Ramos-Paredes J  De la Rosa-Vélez J 《Journal of fish diseases》2011,34(4):327-329

  相似文献   

The effectiveness of a commercial microbial product in poorly prepared tiger shrimp, Penaeus monodon (Fabricius), ponds   总被引：5，自引：0，他引：5  

M Shariff  F M Yusoff  T N Devaraja  & P S Srinivasa Rao 《Aquaculture Research》2001,32(3):181-187

The efficacy of a commercial microbial product was tested in commercial tiger shrimp, Penaeus monodon (Fabricius), ponds for one culture period in Kuala Selangor, Malaysia. Four ponds with replicates for treatment and control were used. The pond bottom was dried but the organic sludge was not removed as normally practised in pond preparation. The ponds were stocked with 15 post‐larvae at the rate of 31.m^?2. Physical, chemical and biological parameters of the pond were analysed every 2 weeks during the culture period. Water quality parameters remained within the optimum range for shrimp culture except for ammonia‐nitrogen being significantly higher in control ponds and silica in treated ponds. Benthic organisms were not found in any of the ponds. The average counts of different bacteria were not significantly higher in treated ponds than control. Because of poor health, the shrimp were harvested earlier (72 days) than the usual 120 days. An average of 875.60 ± 67.00 kg shrimp ha^?1 was obtained in treated ponds with a feed conversion ratio (FCR) of 1.57 ± 0.10 and survival rate of 42.35 ± 5.37% compared with 719.50 ± 130.94 kg shrimp ha^?1, 2.99 ± 0.70 and 21.25 ± 3.26%, respectively, in control ponds. Neither the microbial product nor the frequent water exchange was effective in overcoming the problems caused by the poor pond bottom.  相似文献   

The study on the cytology and histochemistry of lymphoid organ spheroids in Penaeus chinensis     

Ming Yu Shao  Zhi Feng Zhang  Kyoung Ho Kang  Zong Tao Chen  Jae Min Kim 《Aquaculture (Amsterdam, Netherlands)》2004,240(1-4):463-471

The lymphoid organ spheroids (LOS) were investigated by cytological and histochemical techniques in Penaeus chinensis. The results showed that the LOS only appeared in the individuals with relatively large lymphoid organ (long diameter>2 mm.). The LOS were mainly made up of two types of cells, one of which had a low cytoplasm to nuclear volumetric ratio, developed marginated chromatin and 1–2 nucleoli, while the other had large cytoplasm to nuclear volumetric ratio, homogeneous chromatin, and no or only one nucleolus. These two kinds of cells all contained mitochondria and rough endoplasmic reticulum. The necrotic cells could usually be observed. The LOS showed negative PAS reaction, weak positive phenoloxidase, and negative -naphthyl-acetate esterase (-NAE).  相似文献   

The effect of vitamin A supplementation in broodstock feed on reproductive performance and larval quality in Penaeus chinensis   总被引：1，自引：0，他引：1  

L. Mengqing  J. Wenjuan  C. Qing  & W. Jialin 《Aquaculture Nutrition》2004,10(5):295-300

The effect of feeding four semi‐purified diets A1, A2, A3, A4, containing different vitamin A acetate levels 0, 20, 40, 60 mg kg^?1 diet, respectively, on fecundity, egg hatching rate, larval survival rate and vitamin A content in eggs of Chinese shrimp (Penaeus chinensis) broodstock was compared with a fresh clam diet (control) in a 60‐day feeding trial. The broodstock shrimp fed the diet with 60 mg kg^?1 vitamin A acetate added exhibited significantly higher fecundity (P < 0.01). Hatching rate was highest with diet A4 (P < 0.05), whereas hatching rates were similar fed diets A1, A2, A3. Increasing levels of vitamin A in broodstock diet resulted in improvement in larval quality. The vitamin A levels in shrimp eggs from broodstock fed with diet A4 were higher compared with those from broodstock fed with diet A1, A2 (P < 0.01). The fecundity and hatching percentages were positively correlated with the vitamin A content in eggs in the present study. The results of this study showed that higher level of vitamin A in broodstock diet may have positive effects on fecundity and larval quality in P. chinensis.  相似文献