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1.
对不同品系的低孵化率卤虫卵进行了孵化对比试验,分为试验组和对照组,其中试验组添加孵化强化剂与对照组进行同等条件的试验,2组对照组的孵化率分别是66.8%、64.9%,试验组的孵化率分别是84.3%、81.5%增幅超过15个百分点,说明这种针对低孵化率卤虫卵研制的强化剂有效可行,可做进一步推广试验。  相似文献   

2.
研制出卤虫卵孵化强化剂及其生产工艺,对天津塘沽盐田和新疆艾比湖的卤虫卵利用孵化强化剂进行了孵化对比试验,分为试验组和对照组,其中试验组添加孵化强化剂,在相同条件下与对照组进行对比试验。结果表明,添加Ⅰ型孵化强化剂的试验组,孵化率平均增幅高达16%,添加Ⅱ型孵化强化剂的试验组,孵化率平均增幅为5%,增幅显著,证明了孵化强化剂具有提高卤虫卵孵化率的功能。  相似文献   

3.
对两种不同品系的卤虫卵进行了孵化对比实验,分别分为实验组和对照组两组,其中实验组添加孵化强化剂,其他孵化条件与对照组相同。两组对照组的孵化率分别为80.3%和79.6%,而加入孵化强化剂之后的实验组的孵化率分别为85.3%和86.4%,增幅范围为5%~10%。从而更加说明了孵化强化剂型的显著效果,为进一步的中试奠定了基础。  相似文献   

4.
报道了青海尕海湖和西藏盐湖中生产的两种品系卤虫卵的孵化率情况,阐述了提高其孵化率的几种物理和化学处理方法,为进一步研究卤虫孵化特性提供了有关的参考数据。  相似文献   

5.
作者设计一种摇瓶法与目前国内常用的烧杯法对同一卤虫卵样品进行孵化率测定,其平均值分别为84.85%和80.90%,前者显著高于后者。两种方法比较,摇瓶法的测定结果更准确。  相似文献   

6.
我国内陆盐湖卤虫卵孵化特性的初步研究   总被引:1,自引:0,他引:1  
本文报告了我国新疆、青海和内蒙古等地四个盐湖中生产的卤虫卵的孵化特性和提高其孵化率的几种化学处理方法。为进一步开发利用我国内陆盐湖的卤虫资源提供了有用的参考数据。  相似文献   

7.
介绍了国外测定卤虫卵孵化率的6种方法,并对各种方法的优、缺点进行了简要的评述。其中有4种方法是国外卤虫卵生产公司内部掌握使用的,在公开刊物中无法查到。现公开介绍大家,希望对卤虫卵的研究者、生产应用者和经销者都有所裨益。  相似文献   

8.
中国卤虫卵孵化温度特性的研究   总被引:1,自引:0,他引:1  
依据有效积温法则,对中国12个主要地理品系卤虫卵的孵化速度、发育起点温度及其发育同步性作了分析。结果表明,各品系的孵化速度因温度不同而差异极显著;相同温度下各品系间孵化速度也有显著差异;在沿海品系中,其发育起点温度由北往南基本呈递增趋势。以各品系孵化发育历期的变差系数作为发育同步性的衡量指标,依据发育同步性程度及发育起点温度、有效积温进行聚类分析,提出了适合我国卤虫卵加工及使用的最佳品系组合。  相似文献   

9.
现行几种卤虫卵孵化率测定方法的比较   总被引:1,自引:0,他引:1  
本文通过对国内外现行4种卤虫卵孵化率测定方法的比较,找出了各种方法产生误差的原因,从理论和实践上论证次氯酸钠溶壳方法的科学性和实用性。  相似文献   

10.
根据本人在数年卤早资源调查和虫卵加工以及销售工作后,对国内卤虫精卵的常见孵化率测定方法和国际通用的卤虫卵孵化率测定方法进行比较。评述其优缺点。并认为国内常见的静态镜检法和动态镜法和[1]比利时肯特大学P.SORGELOS等所推荐的方法A和B法是一致的。但工作过程必须按要求程序进行,否则将有较大误差。  相似文献   

11.
诱导大盐湖卤虫(Artemia.francisana)和东营卤虫(Artemia.sinina)产休眠卵,作为研究对象探讨了最适终止滞育的方法,结果表明:用20℃冰冻20d,3%的H2O215min处理对大盐湖卤虫休眠卵最有效,而4℃下饱和卤水浸泡25d对东营卤虫休眠卵最有效,研究还发现在不同盐度和温度的组合培养条件下得到的休眠卵,用同一种终止滞育方法处理后,其孵化育不同。  相似文献   

12.
几个因子对内蒙古自治区卤虫卵孵化率的影响   总被引:1,自引:0,他引:1  
采用常温、冷冻和盐水浸泡的方法.用3%双氧水、3%甲醛和3%高锰酸钾处理卤虫卵,研究诸因子对卤虫卵孵化率的影响。试验结果表明:产于内蒙古自治区的卤虫卵最佳孵化盐度为35;用3%双氧水和3%甲醛处理卤虫卵均能提高其孵化率;用粗盐饱和溶液处理是保存卤虫卵的好办法。  相似文献   

13.
介绍了用丰年虫卵壳制备甲壳素及壳聚糖的方法及过程,通过傅立叶变换红外光谱仪的检测并与美国标准谱图库检索出的用蟹壳制备的壳聚糖光谱图对照,证实丰年虫卵壳制备的壳聚糖。  相似文献   

14.
    
The residual water from intensive aquaculture production systems can be utilized in integrated multitrophic cultivations. In this work, Artemia franciscana received daily feedings of 10 mg L?1 of Tetraselmis chuii, Nannochloropsis oculata and Chaetoceros muelleri, which were grown using residual water from an intensive biofloc Litopenaeus vannamei cultivation system. The goal of this study was to verify which species provide the best zootechnical performance and best crustacean biomass production efficiency. After 12 days of cultivation, A. franciscana wet biomass was 815.64 ± 18.74, 650.81 ± 83.98 and 40.76 ± 4.08 mg L?1 with C. muelleri, T. chuii and N. oculata (P < 0.05), with significant differences in dried biomass as well. As for the microalgae cultivation in the alternative culture medium, T. chuii had higher dry biomass gain, requiring less culture volume to achieve 10 mg L?1 and become ready to feed Artemia. Thus, T. chuii was the most efficient in Artemia biomass production with 0.83 L compared to 1.54 L g art?1 in C. muelleri. C. muelleri is recommended for feeding A. franciscana for biomass production purposes. However, due to its better efficiency, T. chuii can be selected to be part of a multitrophic system.  相似文献   

15.
卤虫生物包囊在水产动物疾病防治中的研究现状及展望   总被引:1,自引:0,他引:1  
在水产养殖中,“生物包囊”就是指以饵料生物作为载体包裹营养物质或药物,鱼虾通过摄食这种饵料生物达到营养强化、防治疾病等目的。本文以卤虫为代表,介绍了国内外利用生物包囊防治水产动物疾病方面的研究现状:包囊的优点、强化研究、药代学分析、防治效果等。并对研究中存在的问题和今后的研究方向进行了分析探讨。  相似文献   

16.
卤虫卵化学成分的分离与分析   总被引:1,自引:0,他引:1  
本试验对卤虫卵的化学成分进行分离和分析。卤虫卵的含油量为7.1%,油中不皂化物的含量为4.9%,主要为胆甾醇。脂肪酸中含有较大量的油酸、棕榈酸、棕榈油酸、花生四烯酸和二十碳五烯酸。卤虫卵含蛋白质为20.9%,还含有多种氨基酸。  相似文献   

17.
    
This 28‐day study investigated the effect of three rearing temperatures, 11, 15 and 19°C, on survival and growth of maraena whitefish fry in a recirculating aquaculture system. Three groups of larvae in three repetitions were reared in recirculating system. Each group comprised 200 larvae. Feeding level was fixed at 500–700 Artemia sp. metanauplii per fish per day. Larvae were fed fresh live brine shrimp at 10 ml/tank every 3 hr. Significantly higher body weight (= 0.00), total length (= 0.00), larval yield (= 0.00) and condition factor (= 0.00) were obtained at 19°C compared to 15 and 11°C, as well as at 15°C compared to 11°C. Significantly higher survival (= 0.00) was observed in larvae reared at 11 and 15°C compare to 19°C and no significant differences were observed between 11°C compared to 15°C. No significant differences in size heterogeneity among treatments were found (= 0.46). In larviculture, the optimal assessed temperature for growth of maraena whitefish was 19°C, with highest survival observed at 11°C, at the end of this 28 days trial. The findings in this study apply to the particular study location and may not be applicable more broadly.  相似文献   

18.
为寻找卤虫卵的合适代用饵料,降低河蟹育苗成本,在1997年春季各期河蟹育苗中,进行投喂“高成”牌开口微囊配合饵料试验。结果;试验池幼体胃肠饱满度好,蜕壳时间短,变态整齐,成活率与对照组判别不五,而成本仅为对照池的45%,经济效益显著,且不会对以后幼体发育造成不良影响。  相似文献   

19.
Optimization of antibiotic delivery strategies to aquatic environment and to the specific characteristics of the target species is essential for the improvement of bacterial infection control measures. This work aimed at standardizing the use of Artemia salina to deliver flumequine to fish as antimicrobial treatment. Adult Artemia were used to bioencapsulate flumequine. A flumequine concentration of 358 μg mL−1 was found adequate to perform bioencapsulation during 24 h without causing mortality. Antibiotic concentration in Artemia, quantified by means of a microbiological assay based on MIC determination, using Escherichia coli ATCC 25922 as control strain was 256.55 mg g−1 (±71.22). The therapeutic doses of 10 mg kg−1 BW, calculated on the basis of a consumption of about 4% BW/day, would then be delivered by the consumption of 7.8 Artemia g−1 of fish.  相似文献   

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