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斑点叉尾鮰又名沟鲶,是鲶形目的鱼类。它具有食性杂、抗病力强、适应性广、生长快、肉质细嫩鲜美、营养丰富等优点。自1984年从美国引入我国后,已经成为长江流域和华南地区重要的淡水养殖品种。下面就斑点叉尾鮰池塘标准化养殖的一些具体要求作一个简单的介绍。1池塘选择斑点叉 相似文献
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十二、斑点叉尾(鱼回) 斑点叉尾(鱼回)(见图)简称沟鲶、叉斑,分类上隶属于鲶形目、(鱼回)科。斑点又尾(鱼回)原产于北美洲,是一种大型的淡水鱼类,也是美国淡水养殖的主要对象,产量占美国淡水鱼产量的一半以上。我国于1984年从美国引进养殖,获得成功,证明斑点又尾(鱼回)具有食性杂、生长快、产量高和易养易捕、抗病力强、适应性广、肉质上乘等优点,适宜大力推广养殖。 斑点叉尾(鱼回)是杂食性鱼类,幼鱼主要摄食浮游动物,如轮虫、枝角 相似文献
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斑点叉尾(鮰)Ictalurus punctatus (Rafinesque),又称沟鲶,属于鲶形目(Siluri-forrnes),(鮰)科(Ictaluridae)鱼类.具有生长快、肉质细嫩、无肌间刺、营养丰富、味道鲜美等特点,深受广大消费者欢迎.目前已推广到全国20多个省、市、自治区淡水、咸淡水水体中饲养,经济效益和社会效益显著.关于斑点叉尾(鮰)的营养需求量和实用饲料的研制,不少学者已进行过研究[1~4].但因研究者所用的评定指标、试验条件、对指标值的确定方法等情况各异而结果不一.为此,我们进行了本试验,以期为研制更适合当前斑点叉尾(鮰)无公害养殖的饲料配方提供参考. 相似文献
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康志勇 《养殖与饲料.饲料世界》2004,(3):20-21
斑点叉尾鮰属底栖杂食性鱼类.目前在我国主要是池塘养殖,具有投资小、不受面积大小的限制、见效快、收益大、生产稳定等特点,适合于我国大部分地区淡水水域养殖.可主养,也可与鲢、鳙、鳊、罗非鱼等混养.现将池塘主养斑点叉尾鮰技术简要介绍如下. 相似文献
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斑点叉尾鮰(Ictalurus Punctus Rafinesque)亦称美洲鲶、沟鲶,属于鲶形目(Siluriformes)、鮰科(Ictaluridae),是我国20世纪末从美国引进的鱼类新品种,其营养丰富,肉质细腻、味鲜美,没有肌间小刺,该鱼具有适应性强、食性杂、适温广、抗病力强、生长快、产量高、易饲养、易捕捞等特点,深受广大群众喜爱. 相似文献
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魏静 《四川畜牧兽医学院学报》2009,(4):28-32
在现代法律秩序中,商会自治规范是制定法的基础和必要的补充,甚至在某些方面替代了制定法;商会自治规范主要包括商会组织规范、行为规范、惩罚规范以及争端解决规范等;其效力仅及于其内部成员;商会自治规范和制定法之间存在冲突,但也存在整合的基础。 相似文献
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以国际标准强毒R株人工感染非免疫产蛋鸡,定时扑杀,分别从鼻窦、眶下孔、气管、肺、气囊、卵巢和输卵管分离MG,并收集感染鸡所产蛋分离MG。结果表明,人工感染48小时后上、下呼吸道及肺已被全面感染,96小时气囊已被感染,120小时输卵管已能分离到MG,卵巢始终分离不到MG。人工感染鸡自144小时便能在其所产蛋中分离出MG。药物治疗能在72小时内消除感染,油乳剂苗则需24天后逐渐降低蛋内MG分离率,药物卵内注射、种蛋药浴、高温处理均能杀死卵内MG,但以研制的种蛋浸泡剂药浴效果为最好。 相似文献
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本文概述了猪的毛色类型、猪的毛色遗传模式,着重综述了猪毛色基因分子基础的研究进展,指出存在问题并就未来发展方向做了思考。 相似文献
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REASONS FOR PERFORMING STUDY: Centesis of the bicipital bursa using an 8.9 cm long spinal needle has been reported but the alternative of employing a 3.8 cm long hypodermic needle requires validation. OBJECTIVE: To compare the efficacy of 2 different methods of centesis of the bicipital bursa and to evaluate the usefulness of ultrasonographic imaging to determine the location of solution administered when centesis of the bursa is attempted. METHODS: For Trial 1, 6 clinicians, who had no previous experience of centesis of the bicipital bursa, attempted to inject a solution composed of an aqueous radiopaque contrast medium and physiological saline solution (PSS) into the bicipital bursae of 2/12 horses using the previously described distal approach to inject one bursa and a proximal approach to inject the contralateral bursa. The bicipital tendon and bursa were examined ultrasonographically before and after injection; and both shoulders were examined radiographically to identify the location of the medium. In Trial 2, another 6 clinicians, also with no previous experience of centesis, repeated Trial 1, using 6 horses, but the radiopaque contrast medium was mixed with air instead of PSS. RESULTS: Accuracy of centesis using the proximal approach was 39% and that of the distal approach 28%. Ultrasonographic examination of the shoulder allowed the location of solution and air to be accurately predicted in all 12 shoulders examined. CONCLUSIONS: Clinicians who have had no previous experience performing centesis of the bicipital bursa are unlikely to be successful in centesis using either approach. Radiographic examination after injecting a radiopaque contrast medium may be necessary to assess the success of centesis especially if bursal fluid is not obtained during centesis. Injecting air along with the radiopaque contrast medium provides more accurate ultrasonographic confirmation of centesis and better radiographic definition than does injection without air. 相似文献
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