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101.
个别企业中虚假的会计信息已严重干扰了市场经济发展,扰乱了市场秩序,败坏了社会风气,这就使会计职业道德问题显现出来。本文浅述了会计职业道德内容、现状及其重要性,从而提出了关于加强会计职业道德建设的几点建议。 相似文献
102.
总结了宁夏农民专业合作组织的发展现状,并从农民专业合作组织对宁夏农产品的质量保证、品牌创新、市场拓展等方面论述了农民专业合作组织对宁夏农产品品牌推广的促进作用。 相似文献
103.
文章主要针对机电类数控专业的教学模式,分别从课程设置、师资队伍、教学过程等方面,介绍了对一体化教学方法的思考以及初步试验所得经验,为做好教学改革工作,培养提高学生的能力,提出应注意的问题。 相似文献
104.
蚕桑作为传统农业产业,近年来农民专业合作组织也有所发展,但受历史形成的生产方式和产销体制、机制等因素的束缚,与其他产业的合作组织相比,不仅规模小、功能不全、带动能力弱,而且中介和服务等作用没有充分发挥,甚至流于形式.笔者通过对2个畜禽和1个葡萄专业合作社生产经营,与本市蚕桑专业合作组织的比较,分析了蚕桑专业合作组织面临的主要问题与原因,提出了发展壮大蚕桑专业合作组织的对策措施. 相似文献
105.
甲藻赤潮对养鲍业的危害及其防治探讨 总被引:7,自引:0,他引:7
1998年5月17日-1998年6月6日在福建省连江县苔录镇后湾海域发生一起由裸甲藻等引起的赤潮,对鲍鱼养业造成严重危害,初步断定:引起鲍鱼死亡的原因是由于裸甲藻等赤潮生物分泌了某种毒素。并对赤潮在陆上养鲍业上的治理方法进行了研究。结果表明:5-20mL/m^3甲醛溶液可杀伤甲藻等赤潮生物,但不能解体该赤潮生物;0.1-0.5g/m^3KMnO4可完全治理该种赤潮生物所引起的鲍鱼死亡现象。 相似文献
106.
Development of inland aquaculture in arid climates: water utilization strategies applied in Israel 总被引:1,自引:0,他引:1
D. Mires 《Fisheries Management and Ecology》2000,7(1-2):189-195
Israel has a temperate climate with marked differences between the northern and southern regions. Rainfall ranges between 250 and 600 mm year−1 in the former and between only 25 and 200 mm year−1 in the latter. During the last 30 years, water consumption has increased markedly in all sectors. Although a water allocation for inland aquaculture is made, in most cases it is given the lowest priority, and aquaculturists have learned to contend with difficulties, and thrive on brackish water sources not fit for human consumption or agricultural crops. Since most water sources are already fully exploited, further development of all sectors will depend on their respective capacity to use recycled city water, desalinated brackish or sea water, or recycled pond water. In this respect, inland aquaculture is handicapped by public prejudices which will not allow the use of water from the first source and farms are still not able to cope with the cost of the second. Therefore, further development of inland aquaculture will depend on the capacity of farmers to use sea water, and to recycle pond water time and again to produce more fish with less (inland) water. Various strategies have already been developed in Israel and new ones are under study. These include water harvesting in dual-purpose reservoirs, recycling of pond water from one year to another, development of intensive flow-through systems based on recycled pond water and colleagues based on biofiltration. 相似文献
107.
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109.
Juan Pablo Hualde Walter Damián Ceferino Torres Pablo Moreno Mirna Ferrada Mariela Ana Demicheli Leonardo Javier Molinari Carlos Marcelo Luquet 《Aquaculture Research》2011,42(6):754-763
An experiment was performed to evaluate the performance of Patagonian pejerrey during net cage rearing in the oligomesotrophic reservoir Exequiel Ramos Mexía. Survival, growth, nutrition and reproduction were evaluated for two lots of pejerrey, initial weights 4.0 and 2.5 g, reared in net cages for 22 and 14 months respectively. Fish were stocked at 29 and 48 individuals m?3 densities and fed with an experimental pejerrey feed. During the experiment, temperature fluctuated between 6.6 and 19.6 °C. The two lots did not show substantial differences in survival (pooled survival at the end of the experiment >80%) and the thermal‐unit growth coefficient (TGC), daily feed intake and feeding efficiency were 0.43±0.19, 1.70±0.80 and 53.6±9.9 respectively. Digestive tract analysis showed that caged pejerrey can consume substantial quantities of natural food, taking advantage of its planktivorous condition. Pejerrey showed high percentage survival, slow growth and early sexual maturation in captivity. The use of the TGC is proposed as a model for describing the growth pattern of this species and other pejerrey under culture conditions. 相似文献
110.
Stéphanie Houle Kevin K Schrader Nathalie R Le François Yves Comeau Mourad Kharoune Steven T Summerfelt Arianne Savoie Grant W Vandenberg 《Aquaculture Research》2011,42(3):360-365
The ‘earthy’ and ‘muddy’ off‐flavours in pond‐reared fish are due to the presence of geosmin or 2‐methylisoborneol in the flesh of the fish. Similar off‐flavours have been reported in fish raised in recirculating aquaculture systems (RAS); however, little information is available regarding the cause of these off‐flavours. Our hypothesis was that earthy and muddy off‐flavour compounds, found previously in pond‐raised fish, are also responsible for off‐flavours in fish raised in RAS. In this preliminary study, we examined water, biofilms in RAS and fillets from cultured arctic charr known to have off‐flavours and requiring depuration using instrumental [solid‐phase microextraction procedure and gas chromatograph‐mass spectrometry (GC‐MS)] and human sensory analyses. Geosmin was present in the samples taken from the biofilter and on the side walls of the tanks. Two‐methylisoborneol was only found in low levels in the samples. The GC‐MS results indicated the presence of geosmin in the fillets (705 ng kg?1), but lower levels were found in the water (30.5 ng L?1). Sensory analyses also detected an earthy flavour (i.e., geosmin presence) in the fillets, and, therefore, it appears that geosmin is the main compound responsible for the off‐flavour in RAS. Further studies are being performed to identify the microorganisms responsible for geosmin production in RAS. 相似文献