千岛湖水环境质量调查与保护对策   总被引：5，自引：0，他引：5  

韩伟明  胡水景  金卫  李瑾  李峻雷  王进 《湖泊科学》1996,8(4):337-344

1992年7～8月,对大口鲇幼鱼进行了不同饲料喂养和驯化试验,对其摄食、生长进行了研究。试验表明,大口鲇生长迅速,尤其投喂适口的活鱼,其生长速度极快,21天增重2.67～4.60倍,比投喂鱼肉组的体重增长快37.9％～84.3％。具有早晚摄食的习性,平均每克体重日摄食活鱼量为0.1～0.2g,摄食鱼肉量为0.18～0.29g,其饲料系数前者为2.32～3.12,后者为4.15～7.86。试验还表明,大口鲇幼鱼亦摄食人工混合饲料,5cm左右便可用人工饲料进行驯化,但驯化过程要逐渐过渡,驯化期间生长速度受到影响,饲料系数亦较高。  相似文献   

人工配合饲料与小杂鱼饲养赤点石斑鱼效果的对比试验   总被引：2，自引：0，他引：2  

李金秋  林建斌  朱庆国  李传亮 《台湾海峡》2004,23(2):167-173

本试验分别以配合饲料、小杂鱼饲养赤点石斑鱼，观察不同饲料对其生长和养殖水体氮、磷含量变化的影响，经过42d的饲养，投喂配合饲料的试验组与投喂小杂鱼的对照组尾平均日增重分别为0．60、0．50g／尾，饲料系数分别为2．34、7．90。赤点石斑鱼摄食后水体中的NH3-N、NO2-N、TP含量随着其摄食后时间的延长呈先升高后下降的趋势，NH3-N、TP含量在鱼摄食后18～22h内达到高峰，NO2-N含量在鱼摄食后10～14h达到高峰。试验组水体的NH3-N含量低于对照组(p＜0．01)，NO2-N含量在排泄高峰期也低于对照组(p＜0．10)，TP含量在鱼排泄高峰期高于对照组(声＜0．05)。  相似文献   

Optimization of Stocking Density for the Sea Cucumber,Apostichopusjaponicus Selenka,Under Feed-Supplement and Non-Feed-Supplement Regimes in Pond Culture     

QIN Chuanxin  DONG Shuanglin  TAN Fuyi  TIAN Xiangli  WANG Fang  DONG Yunwei  GAO Qinfeng 《青岛海洋大学学报(英文版)》2009,(3):296-302

Optimal stocking densities were investigated for the sea cucumber Apostichopusjaponicus Selenka under feed-supplement and non-feed-supplement regimes in net enclosures for 333 d. Substantial weight loss occurred during the aestivation phase （AE）. Decreased growth rates were also observed during the winter phase （WT）. In contrast, sea cucumbers showed rapid growth during the spring （SP） and autumn （AU） phases. Feeding regimes considerably influenced the growtb performance, i.e., sea cucumbers grew faster under feed-supplement regime than under non-feed-supplement regime （P 〈 0.05）. The average survival rates of sea cucumbers under feed-supplement regime were higher than those under non-feed-supplement regime for both the autumn phase and spring phase, but the differences were only significant for the latter phase （P〈 0.05）. The fitted B-N curves showed that the optimal stocking densities, in terms of net production, were 22.3 ind. m^-2 for feed-supplement regime and 14.1 ind. m^-2 for non-feed-supplement regime.  相似文献   

大菱鲆配合饲料中植物蛋白替代鱼粉的可行性研究   总被引：4，自引：0，他引：4  

王海英  孙谧  薛长湖  王清印  徐明起 《海洋科学》2008,32(6):9-12

研究了植物蛋白豆粕部分或全部替代鱼粉对大菱鲆生长和消化酶活性的影响。用含不同豆粕量的饲料对4个实验组的大菱鲆（Scophthalmus maximus L．）在18℃下进行50d的饲喂实验,结果表明不同饲料配方下的大菱鲆对蛋白质和碳水化合物的表观消化率随饲料中豆粕质量分数的增加呈现下降的趋势;生长实验表明,30％豆粕质量分数实验组和10％豆粕质量分数实验组（常规质量分数）的生长状态良好,50d的体质量增长率分别为82．25％,85．3％,特殊生长率为1．19,1．23,饲料系数分别为1．35,1．28,蛋白质效率分别为1．44,1．49,各生长参数差别不显著。50％豆粕质量分数实验组及70％豆粕质量分数实验组生长缓慢;各实验组大菱鲆消化器官比重随豆粕添加量的增多而呈增大的趋势;不同饲料配方组大菱鲆蛋白酶、淀粉酶活力随豆粕质量分数的增多而升高,脂肪酶无明显变化。以上各实验结果均表明,饲料中以豆粕替代鱼粉量20％对大菱鲆生长无负面影响。  相似文献   

A survey of fodder plants in mid-altitude Himalayan rangelands of Uttarakhand,India     

Vir Singh  R. D. Gaur  Babita Bohra 《山地科学学报》2008,5(3):265-278

Himalayan rangelands, the crucial but by and large the neglected ecosystems, are an integral part of mountain farming systems. The present investigation is based on the extensive survey and collection of mid-altitude range plants from Almora and Champawat districts of Kumaun division in the Uttarakhand Himalaya in India, from September 2003 to June 2007. The rangelands studied were oak types, chirpine types, grass types and mixed ones. Some 300 species of grasses, other herbaceous plants, trees and shrubs were found in the mid-altitude rangelands. A sizeable number of species belonged to the family of Poaceae. The grass-dominated rangelands especially harboured a variety of grass species of good fodder value. The diversity of fodder plants is a proportion of the enormous biodiversity occurring in the parts of the Himalaya. A panorama of the biodiversity emerged in this study, which is of both intangible value and direct value for the livestock- and rangeland- dependent mountain communities, suggests a very high scope of the utilization of this natural and uncultivated biodiversity for supporting livestock- based livelihoods of the region. This biodiversity also has enormous bearing on the cultivated area of the region.  相似文献   

东明县菜园集乡利用林地搞养殖          下载免费PDF全文

卞向阳 《山东国土资源》2008,24(10)

2008年4月,东明县菜园集乡村民欲投资5万余元建养鸡场。在选址中,菜园集乡国土资源所积极协调引导他们不占用耕地,采取节约集约用地方式,在多方考查论证的基础上选择了利用2hm^2成林地作为养鸡场。成林地无法种植农作物,但很适合搞养殖,草料、小虫可以做为鸡的补充饲料,鸡的粪便又可以促进树木的生长,既形成了生态养殖,又集约利用了土地资源。  相似文献   

天然植物提取物对鲤鱼生长性能及血液学指标的影响   总被引：2，自引：0，他引：2  

缪凌鸿  刘胜利  梁政远  戈贤平  刘波  董在杰 《广东海洋大学学报》2008,28(6)

于建鲤(Cyprinuscarpio var.jian)饲料中添加质量分数0.10%、0.15%和0.20%天然植物提取物(类黄酮、多糖),研究天然植物提取物对建鲤生产性能及血液学指标的影响,确定适宜的添加量。结果表明,综合比较成活率、饵料系数、单位产量等指标后,提取物添加量以0.15%为最佳。0.15%添加量组与对照组比较,成活率提高4.7%,饲料系数提高10%,单位产量提高18.8%,血液指标中红细胞增加44.5%、白细胞增加45%、中性白细胞增加15.22%、血红素增加10.6%。表明天然植物提取物(类黄酮、多糖)具有多种生物学效应。  相似文献   

鱼溶浆粉在珍珠龙胆石斑鱼幼鱼的高植物蛋白饲料中的应用     

孙永智  宋志东  李培玉  李宝山  王成强  王晓艳  王际英  郝甜甜  马季  黄炳山 《中国海洋大学学报(自然科学版)》2021,51(1):31-43

为研究高植物蛋白饲料中添加鱼溶浆粉对珍珠龙胆石斑鱼(Epinephelus fuscoguttatus♀ ×E.lanceolatu♂)幼鱼的生长性能、体组成、血清生化指标、非特异性免疫及肠道组织结构的影响.以(23.72±0.09)g的珍珠龙胆石斑鱼幼鱼为研究对象,添加60％ 白鱼粉为对照组(DF),用30％ 大豆浓...  相似文献   

红鳍东方鲀养殖技术研究现状及展望   总被引：5，自引：0，他引：5  

马爱军  李伟业  王新安  岳亮  庄志猛  孟雪松  刘圣聪  谭林涛  侯仕营 《海洋科学》2014,38(2):116-121

<正>红鳍东方鲀(Takifugu rubripes),属鲀形目(Tetraodontiformers)、鲀亚目(Tetraodontoidei)、鲀科(Tetraodontidae)、东方鲀属(Takifugu),俗称河鲀、廷巴、腊头、龟鱼等,为近海底层食肉性鱼类,主要分布于北太平洋西部的日本、朝鲜半岛和中国沿海[1]。因其味道鲜美、肉质细嫩,经济价值高昂,在中国北方地区和日本、韩国等形成养殖规模。目前国内外对红  相似文献   

The effects of the identity of shrub species on the distribution and diversity of ground arthropods in a sandy desert ecosystem of northwestern China     

JiLiang Liu  WenZhi Zhao  FengRui Li 《寒旱区科学》2014,6(6):0587-0596

Shrub is an important factor on structuring ground arthropod communities in desert ecosystems. In this study, in order to determine how shrubs and their species influence ground arthropod distribution patterns in a sandy desert scrubland dominated by two different shrub species, Calligonum mongolicum and Nitraria sphaerocarpa, the ground arthropods were sampled with pitfall traps during spring, summer and autumn. At the community level, total arthropod abundance was shown to be significantly higher under shrubs than in intershrub bare areas in spring; similar patterns occurred in terms of the richness of arthropod groups in the spring and over three seasons, suggesting season-specific shrub presence effects on arthropod activity. In addition, more arthropods were found under N. sphaerocarpa shrubs than under C. rnongolicum shrubs in autumn, suggesting season-specific effects of shrub species of arthropod activity, whereas more arthropods taxa were captured under C. mongoIicum than N. sphaerocarpa. At the trophic group level, the abundances of predator and herbivore arthropods were significantly greater under shrubs than in intershrub bare habitats, whereas herbivore arthropods were more abundant under N. sphaerocarpa than C. rnongolicum, and an opposite rule was detected for predator arthropods At the family level, the mean abundances of Carabidae, Curculionidae, Gnaphosidae and Lycosidae were significantly higher in the shrub microhabitats than in the intershrub bare habitat, there was no significant difference between habitats on the mean abundances of Formicidae and Tenebrionidae. The study results suggested that shrub presence and shrub species variation are important determinants of ground arthropod assemblages in this desert ecosystem, but the responses of ar- thropods differed among trophic and taxonomic groups.  相似文献