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<正>本文根据加州鲈工厂化循环水育苗生产实践,总结加州鲈工厂化循环水育苗技术要点,以期为生产实践提供相关技术参考。一、工厂化循环水系统组成及操作要点1.循环水系统的组成及运行本循环水育苗系统由中央控制系统、循环系统、养殖池、微滤系统(物理过滤)、蓄水池、生化反应系统、冷热交换系统和增氧系统组成。其中,中央控制系统包括循环系统的电机、微滤系统、生化反应系统和增氧系统,冷热循环系统单独运行。 相似文献
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深水网箱水下网格式锚泊系统的安装工艺 总被引:2,自引:0,他引:2
深水养殖网箱由网箱框架系统、网衣系统、锚泊系统和配套设施系统四大部分组成。其中锚泊系统是网箱在水中的根基,确保网箱系统正常运作和在高海况中不致网箱整体受力不均而损坏。 相似文献
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对连云港市宋庄镇有机海水养殖基地的海水围塘南美白对虾—缢蛏—梭鱼混养系统和南美白对虾单养系统的能量收支与利用效率进行了研究。结果表明,在有机水产养殖方式下,混养系统中能量输入、输出分别为10.54和8.37MJ/m2,单养系统能量输出、输入分别为13.45和10.72MJ/m2。混养系统的光能利用率、光合能转换效率、生物能转换效率、总能转化率和底泥沉积率分别为0.18%、34.51%、48.11%、16.89%和62.41%,单养系统相对应的数据分别为0.19%、24.95%、24.04%、11.17%和68.54%。混养系统除光能利用率外,其他指标均优于单养系统,底泥沉积率亦小于单养系统。从综合生态经济指标来看,混养系统也优于单养系统,但2者综合生态经济指标(EY)均小于1,混养和单养系统都具有提高经济效益和生态效益的潜力。 相似文献
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随着科技社会的进步,PLC控制系统在循环水养殖系统中应用的越来越广泛,PLC控制系统可以时时监测循环水养殖系统中各项影响水质因子的变化,如溶氧、p H、温度等关键参数。通过对循环水孵化冷水鱼鱼卵系统的介绍,详细描述了设计原理、控制理念、软硬件设计结构,实现了系统的逻辑控制、安全控制、故障报警显示,以及通过远程电脑如何控制PLC系统。 相似文献
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正一、工业化养殖整体工艺流程及养殖车间概况养殖车间现有养殖池20个,每个鱼池20米2,水深1.2米,每小时循环一次,为了实现循环水智能化养殖,建立了以生物水处理系统、水质监控系统、溶氧系统、温控系统、杀菌系统、在线监测报警系统等一系列系统工程在内的物联网。在线监测报警系统可随时监测养殖水体中亚硝酸盐、氨氮、溶氧、pH值、温度等各项指标,及时了解养殖水质(见图1)。 相似文献
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抗风浪深水网箱用连接件的开发 总被引:1,自引:0,他引:1
抗风浪深水网箱主要由框架系统、网衣系统、固迫系统、配重系统等组成,其中框架系统是整个深水网箱抗风浪的关键设备,它既要产生浮力,又要能经受住风浪的袭击。目前框架系统主要是采用HDPE材料制作,由2根或3根浮管、连接件、立柱和扶手管组成,其中连接件是用于连接2根浮管, 相似文献
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从1985年起日本开始深入研究太阳能发电应用于渔业上的方法,最近已建成两个系统。该系统由水泥浮体、太阳能电池、数据收集系统、海洋牧场投饲、牧场电拦养殖系统组成。浮筒呈圆盘状,直径16米,高3.5 相似文献
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Mohottala G. Kularatne Upali S. Amarasinghe Premachandra Wattage Sena S. De Silva 《Aquaculture Economics & Management (Blackwell Science)》2013,17(1):22-38
In this paper, an attempt is made to identify the socioeconomic characteristics of a community that influence the development and management of culture-based fisheries in village reservoirs of Sri Lanka. Socioeconomic data were collected from 46 agricultural farming communities associated with 47 village reservoirs in Sri Lanka. Principal component analysis indicated that scores of the first principal component were positively influenced by socioeconomic characteristics that are favorable for making collective decisions. These included leadership of the officers, age of the group, percentage of active members of the group, percentage of kinship of the group, percentage of common interest of the group, and percentage of participation of the group. The size of the group had a negative effect on the first principal component. The principal component scores of communities were positively related to willingness to pay (P < 0.001). The communities with socioeconomic characteristics favoring collective decision making were in favor of culture-based fisheries. Homogeneity of group characteristics facilitated successful development of culture-based fisheries. 相似文献
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E. Mente P. Pantazis C. Neofitou S. Aifanti M. B. Santos E. Oxouzi 《Aquaculture Economics & Management (Blackwell Science)》2013,17(3):313-334
The present study investigates the socioeconomic sustainability of fisheries and aquaculture in the South Evoikos Gulf. The results show poor labour mobility between fisheries and aquaculture. Internal geographical mobility, relatively high salaries and the relatively high educational level of the aquaculture workers contribute to the sustainability for the aquaculture sector. There is a high probability of young, low-educated individuals entering the fishing industry. Furthermore, earnings and professional training prevent people from exiting the fisheries sector, and this may act as a means towards fisheries' sustainability. Grants and subsidies do not seem to influence fishermen's decision to remain or exit the sector. On average more fishermen than aquaculture workers perceive that their profession is supported by the local community and tourist industry. 相似文献
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长江口河日锋区及邻近水域渔业↑(*) 总被引:8,自引:1,他引:8
长江口河口锋区及邻近水域优越的自然环境条件构成多种经济鱼类的重要产卵、索饵场所,是重要渔业水域之一。本文根据有关调查资料和历史文献,对水域的渔业概况进行了初步探讨。分析了水域鱼类区系特征、生态类型。简要介绍了水域主要经济鱼类的洄游分布、资源状况和渔业生产等内容。 相似文献
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U-Primo E. Rodriguez Yolanda T. Garcia Sheryl M. Navarez 《Aquaculture Economics & Management (Blackwell Science)》2013,17(1-2):169-194
ABSTRACT This paper describes the effects of changes in export prices on Philippine fish demand, supply, prices and trade. The analysis uses a multi-commodity-model of the fisheries sector that is based on the AsiaFish model. The results indicate that higher export prices lead to higher output and exports for the fisheries sector. However, such changes also cause a decline in the domestic consumption of fish. 相似文献
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本文阐述了公海渔业的概念,论述公海捕鱼自由是国际海洋法中的一条基本规则,指出公海捕鱼的权利必须在国际法规定的有关规则限制下行使。根据近年来一些沿海国家试图对公海渔业进行管辖的实际状况和1992年国际上一些主要的国际渔业会议的主要精神,本文分析了国际渔业法律环境的发展趋向,预测了今后国际上进一步限制公海渔业的可能形式,并结合我国公海渔业发展的实际情况,提出我国发展公海渔业过程中应当给予重视的几个问题。 相似文献
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根据随船调查材料,对大西洋南部金枪鱼延绳钓渔业从捕捞技术,渔场环境因素,渔获物情况、初加工、销售等方面做出了总结。本文着重分析了各个作业渔场的渔获情况,判断出八个中心渔场的位置,并就大眼金枪鱼在这几个中心渔场的生物学特征做了统计分析,从而为用地理信息技术预报渔场提供了实施依据。 相似文献
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Elizabeth Petersen Caroline Lever Steven Schilizzi Greg Hertzler 《Aquaculture Economics & Management (Blackwell Science)》2013,17(3):267-284
Reservoir aquaculture has developed in an ad hoc manner in Vietnam to date. A bioeconomic model of reservoir aquaculture in northern Vietnam is presented in this paper to highlight issues of developmental importance of reservoir aquaculture in Vietnam. The biological model is based on a conventional von Bertalanffy growth function and the economic model is a net revenue function. The greatest source of costs for the operation are restocking costs (75%) and contract labor costs (18 percent). Benchmark net revenue is approximately 8.7 million VND (approximately US$539). The stocking density, length of time between stocking and harvest and harvesting efficiency have the largest impact on net revenue. The inclusion of aquaculture into government fisheries development plans with research focused on development of fingerling production, preparation of flooded land for aquaculture production and strengthening institutional arrangements for reservoir leasing and credit arrangements, is likely to lead to increased capitalization and investment, and therefore greater revenues for local fishing populations. 相似文献
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发展我国南极磷虾渔业的探讨 总被引:5,自引:1,他引:5
南极磷虾不但资源量巨大,而且营养价值高,已引起世界各国的极大关注。自60年代初期前苏联进行试捕调查以来,至今已有几十个国家对南极磷虾进行调查研究。前苏联、日本等国先后从70年代开始对南极磷虾进行商业性捕捞,已形成年捕捞量数十万t的规模。我国是海洋渔业资源不多,渔民人数多及捕捞生产能力较高,渔业技术较发达的国家。国内市场需求水产品数量很大,急切地谋求对外发展。重视发展我国的南极磷虾渔业,积极开发利用 相似文献