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四种物质对草鱼、鲫鱼、泥鳅诱食活性的研究 总被引：11，自引：0，他引：11
研究甜菜碱、化十香味素、巧克力香味素和香蕉香味素分别对草鱼、鲫鱼、泥鳅的诱食效果结果表明,四种物质对草鱼有排斥作用,甜菜碱对鲫鱼有一定引诱作用,其他三种则没有。四种物质对泥鳅均表现出明显的引诱作用,其强弱为：甜菜碱＞巧克力香味素／化十香味素、香蕉香味素 相似文献
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DMPT等七种物质对淡水石斑鱼、泥鳅、金鱼诱食效果的初步研究 总被引：1，自引：0，他引：1
试验比较了DMPT、牛磺酸、甜菜碱、酵母浸膏、L-丙氨酸、甘氨酸、谷氨酰胺等七种物质对淡水石斑鱼、泥鳅、金鱼的诱食效果.结果表明:对淡水石斑鱼诱食效果的强弱顺序为DMPT>甘氨酸>甜菜碱>牛磺酸>L-丙氨酸,其中DMPT达到显著引诱水平(P<0.05);对泥鳅诱食效果的强弱顺序为L-丙氨酸>DMFT>牛磺酸>甜菜碱>甘氨酸;对金鱼的诱食效果强弱顺序为牛磺酸>甜菜碱>DMPT>甘氨酸.谷氨酰胺和酵母浸膏对三种动物均有抑制作用,L-丙氨酸对金鱼有抑制作用. 相似文献
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综述了甜菜碱、氨基酸、动植物提取物3类诱食剂在水产养殖中的应用效果和实验情况。不同诱食剂对不同养殖对象引诱效果不同，同一种诱食剂对不同养殖对象的引诱效果也不同，使用混合诱食剂的一般可增强诱食效果。选择诱食剂的原则是有效、经济、安全、方便。 相似文献
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河蟹配合饲料添加诱食剂的研究 总被引：10，自引：1，他引：10
在河蟹配合饲料中添加诱食剂后其饲养效果有较显著的变化。应用正交设计针对复合氨基酸、甜菜碱和风味素三因子对中华城繁星进行了诱食剂的研究，得出一个比较合适的添加量：复合氨基酸0．6％；甜菜碱0．15％；风味素0．5％。其中，风味素是河蟹诱食作用的主要因子。 相似文献
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综述了诱食剂及作用机理，诱食剂的种类、主要包括甜菜碱、动植物提取液、含S有机物、氨基酸、脂肪和糖类等，主要作用即促进摄食、营养和抗病、改进饵料品位，诱捕剂、提供新饵料源、和源食剂的应用前景。 相似文献
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全世界范围内，饲料霉变的现象都很严重，霉变饲料对畜禽养殖业带来了极大的危害，根据联合国粮农组织估算，全世界每年大约有5％-7％粮食、饲料等农作物产品受霉菌污染，每年由于霉菌毒素造成的损失高迭6亿美元。本文简要综述了饲料霉变及其霉变饲料对猪只的危害。 相似文献
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全世界范围内,饲料霉变的现象都很严重,霉变饲料对畜禽养殖业带来了极大的危害,根据联合国粮农组织估算,全世界每年大约有5%～7%的粮食、饲料等农作物产品受霉菌污染,每年由于霉菌毒素造成的损失高达6亿美元。本文简要综述了饲料霉变及其霉变饲料对猪只的危害。 相似文献
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文章综述了饲料中重金属镉超标对畜禽的毒性危害,主要包括氧化损伤、肾脏损伤、骨质疏松、免疫抑制、繁殖障碍及细胞凋亡等。简述了饲料镉超标危害的主要防控措施。 相似文献
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《Journal Of Applied Aquaculture》2013,25(3):81-88
Two experiments were conducted to evaluate the palatability of sarafloxacin HCl to channel catfish, Ictalurus punctatus. Fingerling channel catfish were raised in 110-1 glass aquaria supplied with flowing well water at a rate of 1 l/min. Fish were fed to satiation once daily either a purified or a practical diet formulated to contain 0, 500, 1,000, 2,000, or 4,000 mg active sarafloxin HCl/kg of diet. Feed consumption was quantified daily for 5 days. All fish were weighed at the beginning and at the end of each experiment. There was a significant decrease in feed consumption of fish fed purified diets with increasing levels of sarafloxacin HCl. However, feed consumption was adequate to provide the proposed dosage regardless of drug concentration. Fingerling channel catfish readily consumed practical diets containing sarafloxacin HCl; feed consumption and weight gain of fish fed medicated and non-medicated practical diets did not differ. There were no apparent palatability problems that would negate use of sarafloxacin HCl in commercial channel catfish feeds. 相似文献
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诱食剂在水产饲料中的应用 总被引：1，自引：0，他引：1
在水产饲料中添加适量的诱食剂可改善饲料的适口性，增进水产动物的食欲，提高饲料的消化吸收率，降低饲料系数，促进水产动物生长，并减轻水质的污染。本文论述了水产动物诱食剂的作用、种类及其在水产饲料中的应用效果。 相似文献
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据分析,软体动物贝壳中含有钙、锶、钴、镁等矿物活性元素约30种,氨基酸10余种,以及多肽、胶原等。这些物质绝大多数是动物生长发育、提高免疫力、增强体质所必需的,如钙、硒、锶、镁、钴等为鱼、虾、蟹的鳞、甲壳及骨骼所必要的元素;锌、镍、磷等为神经系统和生殖系统的重要组分;钾、钠则为循环系统中的电介质。不少养殖经营者深知在饲料配方中添加矿物元素的重要性,但却盲目地加入一些如硫酸锌、硫酸铜、硫酸镁、氯化铁、氯化钴及磷酸钙等无机矿化物作为添加剂,结果带来了不少副作用。 相似文献
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气候、季节、生产环节处理不当、原料水分过高是引起饲料霉变的主要原因，针对上述问题探讨了控制饲料霉变的对策，如加强原料质量控制，搞好贮存、包装、运输，缩短保存期，应用防霉剂等。并对防霉剂的研究方向进行了展望。 相似文献
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Basic data describing the physical characteristics of fish fecal waste are important in the design of effective solid waste management in aquaculture, especially in land-based facilities such as recirculating aquacultural systems (RAS).This study describes the physical properties of feces from rainbow trout fed eight different commercially available and widely used diets in Germany. Additional data from an earlier but unpublished study pertaining to feces derived from two rather extreme all-vegetarian diets are also presented for consideration of the settling properties. The diets were tested on duplicate groups of 50 rainbow trout in a flow-through aquaculture system. The effects of the diets on the physical properties of fecal particles such as particle size distribution (PSD), modeled settling velocity and rheological character were examined and the effects of each diet on fish health, growth and feed utilization were determined. Specific growth rate (SGR) and feed conversion ratio (FCR) for the different diets ranged from 0.98% d−1 ± 0.012% d−1 to 1.39% d−1 ± 0.012% d−1 and 0.97 ± 0.017 to 1.61 ± 0.017 (mean ± S.E.), respectively. The density of presoaked feces was significantly lower than that of intestinal feces and ranged from 1.01013 ± 0.00692 g cm−3 to 1.04547 ± 0.00692 g cm−3 (mean ± S.E.). Stability data were in the range from 390.12 ± 29.4 Pa to 1214.79 ± 29.0 Pa for elastic modulus and from 62.12 ± 6.1 Pa s to 232.68 ± 6.0 Pa s for dynamic viscosity. Based on the stability and PSD data theoretical efficiencies for removal of fecal waste using a drum filter showed remarkable variation, ranging from 82.5 to 95.9% (60 μm gauze). Based on the same data, theoretical removal by a sedimentation basin with routinely using overflow rates of 0.057 cm s−1 to 0.394 cm s−1 ranged from 62.8 to 93.8%. Both fecal density and PSD have an exponential impact on settling performance. Increasing fecal density improves the removal efficiency of a sedimentation basin by about 20%, however sedimentation was seen to be a less robust and efficient removal technique than drum filtration. Sedimentation systems also experience additional problems with respect to leaching. Turbulence that was mimicked in this study reflects to an optimal fish farm, which means disintegrating effects are mainly caused by fish motion. If disintegrating units e.g. pumps are used, which are known to promote further particle breakdown the effects would be amplified.The results demonstrate the central importance of density of suspended solids in defining removal efficiencies and suggest that manipulation of fecal density might offer a new and effective means of managing and optimizing waste output from aquaculture operations. This study describes the basic properties of fecal wastes generated by commercial diets and can be used as a basis for further research. 相似文献
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References： 《海洋水产研究》2001,22(4):64-70
Feed quality,the nutritional quality of feed components may affect absorption and digestibility of the feed,and thus the effluent of chemical components from the faeces.In particular,regimen based on high quality feed in aquaculture may reduce effluents and pollution to the surrounding environment. 相似文献