共查询到19条相似文献,搜索用时 62 毫秒
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虹鳟鱼属冷水性鱼类,生长快,抗病力强,是目前深受养殖户和消费者喜爱的品种之一。2002年,我们利用凌源菩萨庙水库底层水进行虹鳟商品鱼养殖试验,取得较好的经济效益。一、鱼池条件利用凌源菩萨庙水库疏水洞下40m2水泥池(4m×10m)流水养殖,出水口用双层筛绢拦鱼防逃,鱼池水深70cm。水源是水库底层水,水温常年在22℃以下,水体流速为50m3/h,水质良好,适宜养殖虹鳟。二、鱼种来源及放养9月20日,从辽宁本溪地区购进平均规格为175g/尾的虹鳟幼鱼2400条,运输成活率为99%,放入水泥池中养殖。三、饲养管理1.投喂 用粗蛋白含量为40%的鲤鱼配合饲料… 相似文献
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2005年1月到2006年7月我们在河南省安阳市漳武水库发电站下利用水库底层水进行了虹鳟小体积网箱养殖试验,取得较好成绩。现将试验情况总结如下:一、材料和方法1.网箱设置的水域条件彰武水库是丘陵型中等水库,水质清新,溶氧丰富,pH7.2~7.6,平均透明度夏季76厘米、冬季150~200厘米。网箱设置于发电站下的回水潭中,透明度150厘米,pH7.4,溶解氧8~10毫克/升,冬季水温13~15℃,夏季水温17~19℃,流速0.47米/秒。2.网箱结构与设置网箱采用双层5×3结节聚乙烯网片缝制,鱼苗箱网目0.5厘米,网箱规格为1米×1米×1米,成鱼箱网目2.5厘米,网箱规格为2… 相似文献
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笔者对虹鳟溪流水和水库底排水养殖进行试验,试验以五常市沙河子镇为基地,在借鉴本溪、北京等地区冷水鱼养殖经验基础上,结合黑龙江省特有冷水资源优势,尤其是五常优质的泉水资源、高山溪流、水库底排水、涌泉水的实际情况,开展虹鳟养殖。通过对虹鳟的溪流水和水库底排水流水养殖的实践过程对比,得出了虹鳟养殖既可大众化、小投入、小产出式的养殖,也可高投入、高产出、高效益的工厂化、集约化生产。由此可见,虹鳟养殖是一项很好的水产养殖致富项目。 相似文献
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虹鳟(Salmo Irideus Gibbons)原产美国加利福尼亚州,为底层冷水性鱼类,其肉质细嫩,味鲜美,无腥味,无小骨刺,营养丰富。为进一步优化、调整本地水产养殖品种结构,提高经济效益,近年来,我们利用本县溪流水进行虹鳟养殖,实施“北鱼南 相似文献
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虹鳟是一种优质、高产的冷水性鱼类,其适宜于高密度集约化养殖,但是夏季高温到来之时,在高原水库每年的7、8月份水温在23℃以上的时间总在半个月左右,高温威胁着虹鳟的生存。由于处理不当,养殖生产中出现了死鱼现象,给养殖者带来了经济损失。笔者多年来一直在刘家峡水库渔场网箱养殖虹鳟,就网箱养殖虹鳟安全度夏技术进行了研究,并取得了一些经验,现总结如下,以供养殖者参考。1虹鳟对环境的要求虹鳟隶属于硬骨鱼纲,鲑形目,鲑亚目,鲑科,鲑属。我们养殖的虹鳟是一种陆封型的虹鳟,是终 相似文献
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鱼种和饲料是养鱼的物质和能量基础,良好的水质是生产的有利条件,除此之外,投喂是最重要的饲养技术。为了获得较好的饲养和饲料效果,降低养殖虹鳟鱼成本,投喂时应注意以下几点问题: 1.饲料的形状、结构和规格不仅影响适口性,也影响消化率,选择投喂的颗粒饲料的大小要注重适合各生长阶段鱼吞食。在虹鳟鱼喂养中,12g以下的鱼苗鱼种,根据其个体大小可选择O.3mm-2.2mm粒径大小的颗粒饲料投喂;12g~60g的鱼种可分别选择 2.2mm-3.2mm粒径,长度3mm-4mm的颗粒饲料投喂;60g-195g的鱼种可分别选择3.5mm4.5mm粒径,长度4mm-5mm… 相似文献
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2006年,房山区水产技术推广站在实施“水产科技入户工程”的过程中精心组织、深入服务,确保了水产科技入户工作的顺利完成,特别是技术指导员根据实际情况向有条件的虹鳟养殖示范户重点推广了虹鳟健康养殖技术,积累了丰富的经验,同时取得了较高的经济效益和社会效益,全区推广应用面积达到100亩,虹鳟产量80万公斤,产值1600万元,利润480万元,比2005年产量提高了13%,利润提高20%,病害发生率降低15%,通过虹鳟健康养殖技术的推广,示范户的科技应用能力得到了普遍增强,水产品质量安全意识得到了显著提高。 相似文献
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库湾网箱养殖虹鳟试验初报 总被引:1,自引:0,他引:1
近年来,我省将冷水性鱼类虹鳟由北方移入试养,但都局限在有冷水资源的地方养殖.为了拓展养殖空间,扩大养殖规模,我们在低温季节将虹鳟鱼种移到水库网箱养成,而冷泉水主要用于培育虹鳟鱼种并渡夏,使有限的冷水资源发挥更大的作用,同时也有助于提高库区网箱养殖的生产潜力.现将试验情况报告如下: 相似文献
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Dietary yeast culture supplementation improves initial rearing of McConaughy strain rainbow trout 总被引:1,自引:0,他引:1
The addition of a yeast culture food supplement (DVAqua from Diamond V. Mills, Cedar Rapids, IA, USA) was evaluated during feeding of McConaughy strain rainbow trout Oncorhynchus mykiss. Two trials were run consecutively, starting with initial feeding, and were replicated over 2 years. The yeast culture was added to commercial trout starter at levels of 0.125 and 0.25 g kg?1. The number of rainbow trout that died during the first 4 weeks of rearing was significantly reduced in the tanks receiving either of the yeast culture‐supplemented diets compared with the tanks receiving a control starter diet. Ending tank weights and gain were significantly and consistently greater in the tanks fed the 0.25 g kg?1 yeast culture diet. Individual fish weights were also significantly heavier in the fish‐fed yeast culture containing diets in each year of the study at the end of 27 days. In the trials from 4 to 8 weeks postinitial feeding, mortality rates were significantly less only in the tanks receiving 0.25 g kg?1 yeast culture supplementation. Individual fish lengths and weights at the end of the second trial were significantly greater in the tanks receiving either level of yeast culture compared with the control diet only in 1 year. Total tank weights and feed conversion were not significantly different between any of the treatments. The inclusion of DVAqua yeast culture provided significant increases in trout survival and growth through the first 4 weeks of feeding, with continued benefits for the next 4 weeks. 相似文献
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P.J. Landless 《Aquaculture (Amsterdam, Netherlands)》1976,7(1):11-25
Rainbow trout learned quickly to operate a trigger to deliver dry food and showed a peak of feeding at dusk, but also appreciable nocturnal feeding. Food deliveries were aggregated into feeding bouts with a preferred time between trigger presses of 4–8 min; the aggregation of feeds was more marked in groups of trout than with trout held singly. Total daily food intake varied with the reward level per trigger press, and could therefore be controlled at about the manufacturers recommended feeding levels. Territorial and hierarchical behaviour were observed and in groups of up to 20 trout only one member of the group pressed the trigger although all the fish took the food delivered, and there was no evidence that smaller fish in a group were deprived of food to the point at which they lost condition. 相似文献