浅析湛江地方文化特色数据库的构建     

赵霞 《农业图书情报学刊》2010,22(11):42-44

分析了构建湛江地方文化特色数据库的重要意义,论述该特色数据库的收录内容、资料收集、建库原则、技术支持等。  相似文献   

Assemblage patterns of fish functional groups relative to habitat connectivity and conditions in floodplain lakes     

S. Miyazono  J. N. Aycock  L. E. Miranda  T. E. Tietjen 《Ecology of Freshwater Fish》2010,19(4):578-585

Miyazono S, Aycock JN, Miranda LE, Tietjen TE. Assemblage patterns of fish functional groups relative to habitat connectivity and conditions in floodplain lakes.
Ecology of Freshwater Fish 2010: 19: 578–585. © 2010 John Wiley & Sons A/S Abstract – We evaluated the influences of habitat connectivity and local environmental factors on the distribution and abundance patterns of fish functional groups in 17 floodplain lakes in the Yazoo River Basin, USA. The results of univariate and multivariate analyses showed that species–environmental relationships varied with the functional groups. Species richness and assemblage structure of periodic strategists showed strong and positive correlations with habitat connectivity. Densities of most equilibrium and opportunistic strategists decreased with habitat connectivity. Densities of certain equilibrium and opportunistic strategists increased with turbidity. Forested wetlands around the lakes were positively related to the densities of periodic and equilibrium strategists. These results suggest that decreases in habitat connectivity, forested wetland buffers and water quality resulting from environmental manipulations may cause local extinction of certain fish taxa and accelerate the dominance of tolerant fishes in floodplain lakes.  相似文献   

Corbett International     

《Journal of Sustainable Forestry》2013,32(1-2):227-228

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图书馆地方文献服务探析     

李翔 《农业图书情报学刊》2012,(3):192-195

阐述了地方文献服务的内涵,并从服务对象、服务内容、服务模式、服务馆员、服务承诺、服务评估6个方面探讨了图书馆地方文献服务的具体细节和管理责任。  相似文献   

半荒漠地区灌木饲料林营造技术研究   总被引：5，自引：0，他引：5  

孙德祥 《干旱区资源与环境》1995,9(2):74-79

本文对半荒漠地区灌木饲料林的树种选择、经营管理等问题进行了初步探讨，给出了花棒、杨柴、柠条、沙柳、毛条、毛柳、白沙蒿、油蒿８个半荒漠地区灌木饲料林树种的造林适宜立地类型、最适造林季节、最佳造林密度、最适收获期以及最佳平茬年龄。  相似文献   

Pain management in horses and farm animals     

Alexander Valverde  DVM  DVSc  DACVA    Cornelia I. Gunkel  Dr. med. vet.  MRCVS 《Journal of Veterinary Emergency and Critical Care》2005,15(4):295-307

Objective: This review discusses the different analgesic drugs and routes of administration used in large animals for acute pain management. General guidelines and doses are given to assist in choosing techniques that provide effective analgesia. Etiology: Noxious stimuli are perceived, recognized, and localized by specialized sensory systems located at spinal and supraspinal levels. Diagnosis: Localizing the source of the noxious stimulus as well as understanding the behavioral aspects and physiological changes that result from such insult is important to adequately diagnose and treat pain. Pain assessment is far from being definite and objective; not only are there species differences, but also individual variation. In addition, the behavioral and physiological manifestations vary with the acute or chronic nature of pain. Therapy: Pain management should include (1) selecting drugs that better control the type of pain elicited by the insult; (2) selecting techniques of analgesic drug administration that act on pathways or anatomical locations where the nociceptive information is being processed or originating from; (3) combining analgesic drugs that act on different pain pathways; and (4) provide the best possible comfort for the animal. Prognosis: Providing pain relief improves the animal's well being and outcome; however, interpreting and diagnosing pain remains difficult. Continuing research in pain management will contribute to the evaluation of the pathophysiology of pain, pain assessment, and newer analgesic drugs and techniques.  相似文献   

Acute cortisol responses of lambs to ring castration and docking after the injection of lignocaine into the scrotal neck or testes at the time of ring application     

Sutherland MA  Mellor DJ  Stafford KJ  Gregory NG  Bruce RA  Ward RN  Todd SE 《Australian veterinary journal》1999,77(11):738-741

OBJECTIVE: To test whether injecting lignocaine into the scrotal neck 5 to 10 s before or into both testes immediately after ring castration and docking wound significantly reduce the plasma cortisol response to castration and docking. DESIGN: A physiological study with controls. PROCEDURE: Lambs were given one of six treatments: control handling, injection of lignocaine into scrotal neck, injection of lignocaine into both testes, ring castration and docking, ring castration and docking after lignocaine was injected into the scrotal neck, and ring castration and docking before lignocaine was injected into both testes. Blood samples were taken before and regularly after treatment and analysed for plasma cortisol concentrations. RESULTS: The plasma cortisol concentrations of lambs castrated and docked after lignocaine had been injected into the scrotal neck were significantly lower between 20 and 60 min after treatment than in lambs castrated and docked without local anaesthesia. Injecting lignocaine into the testes after ring application did not significantly reduce the cortisol response to ring castration and docking. CONCLUSIONS: Lignocaine injected into the scrotal neck 5 to 10 s before ring castration will reduce the cortisol response and by inference the pain associated with ring castration.  相似文献   

摩本杂F₁奶水牛泌乳性能研究   总被引：1，自引：0，他引：1  

张继才  王安奎  付美芬  王喆  杨国荣 《中国畜牧兽医》2007,34(2):145-147

在昆明小哨开展摩本杂F₁水牛的泌乳性能测定，结果表明该杂交牛的泌乳期相对较长,少数个体可长达370 d以上,一般平均为292±45.5 d；一个泌乳期的正常泌乳量平均为2015.38 kg(1761.25~2299.54 kg),平均日产乳量6.39 kg。  相似文献   

萧山草三黄鸡屠宰性能和肉质分析     

舒琦艳  卢立志  原爱平  沈军达  王得前  陶争荣  李国勤  袁青妍  赵爱珍  徐坚 《中国家禽》2006,28(15):19-20

研究对70日龄萧山草三黄鸡进行了屠宰性能和肉质性状的测定,结果显示:公鸡活重、屠体重、半净膛率和全净膛率优于母鸡,差异显著(P<0.05)。腿肌的肉色OD值、剪切力和pH值均大于胸肌,系水力小于胸肌,差异均显著(P<0.05);水分含量、粗脂肪含量大于胸肌,粗蛋白含量、粗灰分含量小于胸肌,差异均显著(P<0.05)。研究表明母鸡的肉质优于公鸡,屠宰性能则不及公鸡。  相似文献   

绿头野鸭与我国主要地方鸭品种遗传多样性研究   总被引：5，自引：0，他引：5  

苏瑛  陈国宏  龙瑞军  万江虹  马龙 《畜牧兽医学报》2007,38(9):899-906

利用17个微卫星标记,采用PCR扩增,8%非变性聚丙烯酰胺凝胶电泳、银染,对绿头野鸭种群和我国9个主要地方鸭品种的遗传多样性进行了检测,统计了各群体的平均有效等位基因(Ne)、平均遗传杂合度(H)、多态信息含量(PIC)、群体间的遗传距离(Ds)和相似系数(I)。采用UPGMA和NJ法构建系统发生树。结果表明:17个微卫星座位在绿头野鸭种群和我国9个主要地方鸭品种中的多态信息含量均为高度多态,所有鸭种的平均PIC、H、Ne分别为0.6506、0.6896、4.1±1.5,基因多态性和遗传多样性相对较高;家鸭各品种间的遗传距离在0.1631~0.6844范围内,绿头野鸭与家鸭品种间的遗传距离分别在0.3096~0.8219之间。根据系统发育树推断中国主要地方鸭品种不是单一起源于绿头野鸭。中国主要地方鸭品种大致可以分为5支。一支为北京鸭、荆江鸭,一支为中山鸭、建昌鸭及高邮鸭,一支为靖西大麻鸭和金定鸭,连城鸭为一支,绍兴鸭为另一支。  相似文献