Catch performance of coastal squid jigging boats using LED panels in combination with metal halide lamps

Squid attracting light systems consisting of low power light emitting diode panels (LEDs) and conventional metal halide lamps (MHs) were tested to describe the influence of combinations of LEDs and MHs on squid catch. Fishing trials using LEDs (9 kW) and different numbers of MHs were carried out in August and September 2009 targeting two squid species: (1) Japanese common squid Todarodes pacificus in northern waters of the Sea of Japan (off Hokkaido) by 4 coastal squid jigging boats (19 gross tonnage) and (2) swordtip squid Photololigo edulis in western waters (off Iki) by 5 boats of the same class. Catches of both species tended to increase with the number of MHs. Generalized Linear Model analysis revealed that in addition to the number of MHs, the catch amount was influenced by fishing power (ability) of boat and by the monthly variation of squid abundance (only for P. edulis off Iki). The expected catch (number of boxes) was not proportional to the number of MHs. The largest catch was expected for P. edulis off Iki by using LEDs with 24 MHs. The optimal combination of LEDs and MHs for T. pacificus off Hokkaido was less clear because the combination with 36 MHs had the largest positive effect on the catch; this was the maximum number MHs used.     

太阳能灭虫灯的灭虫效果及改进建议

通过对两种灭虫灯灯诱昆虫种类及数量的调查,鉴定了18科30余种昆虫．灭虫灯灭虫效果较好,可以提高防治效果,降低防治成本,提出了灭虫灯制作的改进建议．     

照明灯具在养猪舍的应用研究

近年来,随着养猪业的迅猛发展,养猪场普遍采用高密度、高产出、高土地利用率的养殖模式,养猪舍的建设也越来越密闭化、自动化。照明灯具作为养猪舍提供光源的重要设备而被广泛使用。本文结合现代养猪舍的实际需求及国内外养猪舍照明的发展现状,介绍养猪舍照明灯具的研究进展,并对照明灯具在现代养猪舍的使用要求、舍内照度建议和灯具布局计算方案进行说明。     

基于PL3106的路灯控制器在农村路灯系统中的应用

研制的路灯终端控制器采用低压电力线载波通信技术来监控电力线状态,同时具备了向远方监控中心进行应答和报警的功能,并针对路灯分布的线型结构和低压电力载波通信的特点,提出了一种单灯传输通信方案。在该方案中采用一种较为合理的中继策略,使信号在电力线上的传输更加可靠、有效率。试验表明,这种通信方案能满足农村路灯的控制要求。     

仔猪采暖保温设备的研究：Ⅱ.初生仔猪红外线采暖设备的比较

本试验比较了石英管灯、红外线灯辐照下的辐射热、空气温度、动物模型产热量与散热量以及10、20、30、60日龄仔猪体重。结果悬挂高度为40和50cm时,二者辐照下的气温无显著差异,在高度为50cm时,辐射热量差异也不显著,但40cm时,石英管灯的辐射热量大于红外线灯的。二者辐照下的动物模型产热量与散热量均无显若差异。动物试验表明,仔猪各日龄体重二种灯间差异不显著。石英管灯可代替红外线灯作为仔猪的采暖设备。     

Evaluation of intravenous fluorescein in intradermal allergy testing in psittacines

This study was designed to improve the clinical feasibility of intradermal skin testing of psittacine birds using intravenous fluorescein stain. Twenty-five healthy, anaesthetized Hispaniolan Amazon parrots (Amazona ventralis) were injected intravenously with 10 mg kg-1 fluorescein-sodium 1% followed by intradermal injections of 0.02 mL phosphate-buffered saline, histamine phosphate (1:100,000 w/v) and codeine phosphate (1:100,000 w/v) at the sternal apteria. Wheal diameters of reaction sites were measured grossly and under illumination with a Wood's lamp after 5 and 10 min. Fluorescence-enhanced injection sites were scored between 0 and 2, with 0 equivalent to normal skin and 2 equivalent to a plucked feather follicle. The presence of a fluorescent halo around intradermal injections was also recorded. Under Wood's light illumination at 10 min, histamine and saline were evaluated as positive and negative controls, respectively, based on a positive test having a halo and a score of 2. Sensitivity and specificity were each 76% for halo, 84 and 42% for score and 64 and 77% for combination of score and halo, respectively. Further, mean histamine reactions were significantly larger than codeine phosphate and saline (8.8 +/- 0.4 mm; 7.2 +/- 0.3 mm; 5.9 +/- 0.6 mm); however, this finding was not consistent in individual birds. Wheal size, halo presence and score were affected by site location independent from the injected compound. Intravenous fluorescein improved the readability of avian skin tests; however, the compounds tested raised inconsistent reactions in wheal size, score or halo presence. The compound-independent site effect raises concern on the validity of avian skin testing and warrants investigation of other techniques such as in vitro allergy testing. Based on our findings, intradermal allergy testing in psittacines with or without fluorescein is unreliable and cannot be recommended for practical clinical use.     

不同补光强度对冬季温室茄子生长的影响

研究了HMZ40型植物补光灯不同补光强度对冬季温室茄子生长的影响。试验结果表明,冬季温室补光促进了茄子的光合作用,茄子体内的叶绿素含量、净光合速率、胞间CO2浓度、气孔导度均随着光照强度的增加而显著增加;增加了茄子植株的长势,促进了果实的发育,随着光照强度的增加,株高、茎粗、叶面积的相对生长量显著增加,坐果率、果实纵径与横径的生长速度均显著增加。     

两种集鱼灯的光照度分布及其钓捕效果比较

集鱼灯是光诱鱿钓作业中的重要助渔设备,直接影响到诱鱼范围和效果。为此,一些学者对集鱼灯的有效利用和捕捞对象的趋光特性等进行了研究,开展集鱼灯光照度分布及其钓捕效果的比较试验显得十分必要。根据2003年9-11月我国鱿钓船在印度洋西北海域进行的鸢乌贼资源调查中,开展的不同类型集鱼灯的对比试验结果,结合实际生产统计资料,对不同类别水上集鱼灯的光照度分布及其使用效果进行比较和分析,为集鱼灯的有效利用提供基础。     

不同类型杀虫灯诱杀马铃薯田害虫试验

通过比较6种杀虫灯诱杀马铃薯田害虫效果,试验发现运用济南祥辰科技有限公司生产的太阳能频振式杀虫灯诱杀害虫数量最多,可优先选择使用。杀虫灯对田间害虫诱杀种类多、数量大,对害虫天敌诱杀力小,益害比为1:697,可有效地减少农药使用量、保护天敌、避免害虫产生抗药性。     

频振式杀虫灯对水稻和蔬菜害虫的诱杀效果

借鉴黑光灯的基本原理和应用经验,再配以频振高压电网触杀的频振式杀虫灯,诱集的害虫种类多、数量大,既大幅度降低了田间落卵量,又显著减少了虫口密度;节能省电,成本低;对昆虫天敌杀伤力较小,对人畜安全,不污染环境,具有显著的经济、生态和社会效益.