共查询到20条相似文献，搜索用时 76 毫秒
1.
海水网箱养鱼湿颗粒配合饲料优势刍议 总被引：1，自引：0，他引：1
一、我国海水网箱养鱼现状我国是海水养殖大国，目前全国海水网箱养鱼规模在60万箱左右，主要分布在福建、广东、浙江、山东沿海。海水网箱养鱼绝大多数集中在内湾浅海养殖，随着养殖技术的日渐成熟和养殖种类的增多，内海海水的污染和鱼病的多发，国内一些水产科技园区从欧洲引进深水网箱进行外海养殖，已取得阶段性成果。海水网箱养殖的蓬勃发展与目前传统饲料投喂方式已形成矛盾，现在全国南北方海水网箱养鱼所用饲料绝大多数还是冰鲜杂鱼，鲜杂鱼资源有限，饲料转化率低，冰鲜杂鱼易氧化，质量不稳定，生鱼肉中往往含有硫胺素酶，破坏鱼… 相似文献
2.
3.
为了在浙南海水网箱养殖中推广配合饲料,选择浙南海水网箱主养鱼类品种鲈鱼、大黄鱼、美国红鱼、黄姑鱼等进行配合饲料、冰鲜小杂鱼投喂养殖对比试验。试验结果:投喂冰鲜小杂鱼的饲料系数为8.22~10.21,投喂配合饲料的饲料系数为1.28~2.64;投喂配合饲料养成每千克鱼的平均饲料成本为18.63元,养成每千克鱼的总成本为25.64元;当小杂鱼的价格为每千克2.08元时,投喂小杂鱼和投喂配合饲料养殖每千克鱼的饲料成本相同,均为18.64元。试验结果表明,投喂配合饲料同样能养好海水鱼,冰鲜小杂鱼的价格是配合饲料推广的关键因素。 相似文献
4.
石斑鱼属肉食性鱼类,以前投喂的饵料主要是鲜度较高的小杂鱼。随着其养殖业的迅速发展,饵料鱼的供应也日趋紧张,国家相关渔业管理条例规定要求逐步禁止在水产养殖上使用鲜杂鱼(冰鲜杂鱼),未来几年将严禁直接使用鲜杂鱼(冰鲜杂鱼),推广人工配合饲料喂养石斑鱼势在必行。当前,石斑鱼养殖业主要采用的饲(饵)料有:鲜杂鱼(冰鲜杂鱼)、硬颗粒沉料、软颗粒料。不同形状的饲料有不同的饲养效果, 相似文献
5.
2006年3月27日至29日，河北省水产技术推广站、唐山市水产技术推广站及普林海珍水产养殖公司联合在唐山市举办了“漠斑牙鲆及海水工厂化养鱼技术培训班”。来自全省沿海及部分内陆市县70余名同志参加了培训。并参观了滦南普林海珍水产养殖公司． 相似文献
6.
决定海水养殖三大物质要素中的‘饲料要素’的发展落后正是阻碍海鱼养殖效益与养殖产量呈正比例提升的瓶颈。在最近召开的配合饲料在海水网箱养殖中的应用技术现场会上,福建省水产饲料研究会会长陈启发呼吁广大的渔业养殖户应科学养鱼,摒弃投喂冰鲜小杂鱼的做法,推广优质的配合饲料。 相似文献
7.
8.
9.
10.
11.
A counter for rapid counting of live fish, especially trout and salmon, has been developed. The response time of the counter is approximately 100 ms and hence a throughput of up to 10 000 fish per hour can be obtained. Results are given in the paper for counting fish of between 300 g and 1 kg with an error of less than ± 3%. 相似文献
12.
鱼饲料中添加鱼油的作用 总被引：3，自引：0，他引：3
鱼饲料中添加鱼油的作用夏传武（湖北省职工医学院,荆州市４３４０００）顾贫（湖北农学院,４３４１０３）油脂是饲料中的能量和维生素及必须脂肪酸的重要来源。发达国家普遍在饲料中添加油脂特别是鱼油来提高饲料效率。鱼油的价格与棕榈油、豆油、牛油近似,但使用效果... 相似文献
13.
14.
Epitheliocystis is a condition affecting the gills and skin of fish, which has been reported from more than 50 freshwater and marine species. It is caused by intracellular Gram-negative bacteria. Mortalities have been associated with epitheliocystis infections in cultured fish. This review provides an update of our current understanding of this condition, including characterization of the pathogen using immunohistochemical and molecular studies. In most fish species the epitheliocystis agent was negative to an antibody specific for chlamydial genus-specific lipopolysaccharide antigen. Recently, four epitheliocystis agents from four different fish species have been characterized using molecular analysis. While they all belong to the order Chlamydiales, in a lineage separate from the Chlamydiaceae, they are distinct organisms and similarity analysis showed that they had highest similarity values with other chlamydia-like bacteria isolated from various sources, including humans or pig. This confirms the high diversity and host specificity of the pathogen. Further molecular analysis should result in an increased understanding of this condition. To date the pathogen has not been cultured, making experimental studies difficult. High stocking densities, presence of nutrients, season, temperature and fish age have been identified as potential risk factors for the manifestation of this condition. 相似文献
15.
为了充分发挥药物在水产养殖鱼类疾病上的预防和治病作用，选择正确的给药方法至关重要。渔药的使用方法不同，不仅会影响发病鱼体对药物吸收的量和速度，而且还与药物对病原体的作用力的强弱密切相关，甚至会引起药物作用性质的改变。在水产养殖鱼类的疾病防治中，体外用药主要是发挥局部作 相似文献
16.
淡水池塘里的溶氧随着气温、季节、天气变化而改变。可从以下几方面进行预测：一、看天气（1）在夏秋高温季节傍晚下雷阵雨,最容易引起重浮头式泛池,夏秋季节遇上晴天吹南风、气温高,到了夜里吹北风．气温迅速下降,俗称“南撞北”,或者夜里风力较大,气温下降快,也容易引发浮头。（以上三种情况．主是是上下水层对流快,下层氧债迅速上升,增大耗氧层．使全池缺氧）。（2）遇上连绵阴雨、光照条件差．水中光合作用弱、大雾、气温低、半夜或上半夜就可能浮头。（3）久睛未雨加上大量施肥、水质肥．一旦天气转阴．不雷阵雨极易浮头。二… 相似文献
17.
P. Dhert L.C. Lim P. Candreva H. Van Duffel P. Sorgeloos 《Aquarium Sciences and Conservation》1997,1(2):119-128
There has been rapid development in the marine foodfishlarviculture technology in Europe since the early eighties,especially in the flat fish, turbot and halibut, and the bass andbream species. The most significant improvements in the eightieswere the introduction of light control, artificial reproductiontechniques, appropriate water treatment and the use of rotifersand Artemia nauplii of specific sizes and in the late eightiesand early nineties the quality enhancement of live food organismsusing specific enrichment techniques. Present research is focusedon the implementation of several microbial techniques to improvethe hygiene of live prey and fish.Many of the modern larviculture techniques being used in marine foodfish could be adapted for application in the ornamental fish industry. For examples, research in the Onamental Fish Section, Primary Production Department, Singapore has demonstrated that the use of freshwater rotifers and Artemia nauplii would enable artificial rearing of Discus in the absence of the parent fish and improve the larval performance of Gouramis and Tetra larvae. The use of such small live food organisms is likely to facilitate breeding of new fish species with small larvae. Research has also indicated that the use of diets containing vitamin C and certain immuno-stimulants improved the stress resistance of guppy. Such techniques would have important application in the fish transport, an important aspect in the ornamental fish industry 相似文献
18.
从鱼糜下脚料中提取鱼油的研究 总被引：1，自引：0，他引：1
研究以金线鱼和长蛇鲻的混合鱼糜生产下脚料为材料,利用钾法提取鱼油。结果表明,钾法提取鱼油的工艺参数为水解pH为7.5,水解温度70℃,水解时间55min,硝酸钾用量4.5%,盐析时间30min,在该条件下鱼油的提取率达到64.5%。鱼油的理化性质达到了SC/T3502-2000标准粗鱼油的二级要求。鱼油中饱和脂肪酸的含量较高,占总量的48.59%;单不饱和脂肪酸和多不饱和脂肪酸的含量相当,分别为24.48%和24.49%,多不饱和脂肪酸主要是DHA和EPA,含量分别为11.18%和5.17%。 相似文献
19.
20.
IntroductionFish silage has been produced and used as high nutrition protein resource in feed for many years in Nor-way.The main raw materials are fish offals from fish processing industry,dead fish from fish farming factoryand pelagic fish.It is now a successful and profitable industry and benefits environment protection.With therapid growth in fish farming in China,the demands for high quality protein resource are increasing.There isgreat potential for adopting silage technology in China.A… 相似文献