A simple predator-prey model of exploited marine fish populations incorporating alternative prey     

Spencer  Paul D.; Collie  Jeremy S. 《ICES Journal of Marine Science》1996,53(3):615-628

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海洋磁力测量多站日变改正基值归算方法研究     

边刚  刘雁春  肖付民  李明叁  于波  卞光浪 《海洋测绘》2007,27(3):1-4

海洋磁力测量多站日变改正中,为了使整个测区磁场水平统一,必须以主站为基准对分站日变基值进行归算。对多站日变改正中日变基值的归算方法进行了研究,给出了多站日变改正基值归算公式。结论表明:当主站和分站日变基值都采用平均值法时,分站日变基值不需要向主站进行归算;而采用其他方法时(如基时刻或基时段法),为了使整个测区磁场水平统一,必须对分站日变基值进行归算。  相似文献   

深圳湾福田潮滩重金属含量及对大型底栖动物的影响   总被引：9，自引：0，他引：9  

杨丽  蔡立哲  童玉贵  高阳 《台湾海峡》2005,24(2):157-164

根据2002年1月和10月在深圳湾福田潮滩同时获得的大型底栖动物和重金属数据进行分析表明，深圳湾福田潮滩Cu、Pb、Zn、Cd含量明显超标．2002年10月Pb、Cd、Cu、Zn含量的平均值比2002年1月高．与历史资料对比，近几年Cu含量有增加趋势．2002年1月，深圳湾福田潮滩奇异稚齿虫密度与沉积物中Pb、Cd、Cu、Zn含量均有显著负相关关系．尖刺缨虫密度与Pb、Cd、Zn含量均有显著负相关关系，与Cu的相关系数也接近显著相关临界值．2002年10月，只有小头虫密度与Cd有显著正相关关系．文中分析了影响重金属与大型底栖动物数量关系的环境因素．  相似文献   

Assessing the impact of fisheries on demersal fish assemblages of the Mauritanian continental shelf, 1987-1999, using dominance curves   总被引：3，自引：0，他引：3  

Jouffre  Didier; Inejih  Cheikh A. 《ICES Journal of Marine Science》2005,62(3):380-383

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Ecological indicators based on fish biomass distribution along trophic levels: an application to the Terminos coastal lagoon, Mexico     

Sosa-Lopez  Atahualpa; Mouillot  David; Do Chi  Thang; Ramos-Miranda  Julia 《ICES Journal of Marine Science》2005,62(3):453-458

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抓住奥运机遇,加快青岛海洋旅游开发研究   总被引：4，自引：0，他引：4  

董玉明  盛红  陈娟 《海岸工程》2003,22(1):91-94

青岛市作为2008年北京奥运会唯一的伙伴城市，将给青岛海洋旅游开发提供难得的机遇，产生重大而积极的影响。为了加快青岛海洋旅游开发的进程，尽快与国际海洋旅游接轨，必须抓住这一机遇，采取应对措施。  相似文献   

浙闽沿海和台湾海峡海域冬季大风风速计算方法探讨   总被引：4，自引：0，他引：4  

刘京雄  唐文伟  朱持则  吕彤 《台湾海峡》2004,23(1):8-13

本文利用东海区海陆大风对比试验结果及26艘船只两个月的海上航测实况资料，通过对各种风速进行海陆比值分析、差值分析和测站间对比分析。论证了据陆上大风推算该海区大风风速计算式的可靠性，从而为实时、定量地预报海区大风提供了1种方法．  相似文献   

声波对海洋生物影响实验中换能器的研制     

王清池 《海洋技术学报》1997,16(4):29-33

本文介绍利用圆柱形换能器水平无方向性和换能器的近场波束特性，采用压电陶瓷圆柱的径向振动和壁厚振动不同振动模式，设计适宜于声波对海洋生物影响实验使用的换能器。  相似文献   

Ocean bottom tiltmeter with acoustic data retrieval system implanted by a submersible     

Hideki Shimamura  Toshihiko Kanazawa 《Marine Geophysical Researches》1988,9(3):237-254

Sensitive Ocean Bottom Implanted Tiltmeters (OBITs) with a sophisticated data retrieval system have been developed in order to observe directly the subduction of oceanic lithosphere. The OBIT is the first long-term geophysical instrument which was designed to be deployed by a manned deep-sea submersible. When the OBIT is put on oceanic lithosphere which is bending and is about to subduct under a deep sea trench, the OBIT records the subduction by observing the tilt of the surface of the lithosphere. The OBIT system has a sensitivity of 10^-8 radian, which is enough to detect the ongoing subduction in months or years. The OBIT may give an answer to the question whether there are fluctuations in the subduction rate.Two OBITs were successfully deployed on a seaward slope of the Kuril Trench by the newly built French deep submersible, Nautile. The OBITs were installed on the northwest shoulder of Erimo seamount, at a depth of 3930 m, in the Kuril Trench. In order to attain stable long-term observations of crustal deformations, the sensing unit was cemented onto bare rock by mortar. We have not yet had an opportunity to recover the data.The life of the instruments is expected to be more than five years. An acoustic data transmission system has been developed for the OBIT data recovery. The stored data can be retrieved at any moment during the observation period, with no need to retrieve the instruments nor to interrupt the observation, by use of the acoustic system. The acoustic system has a high data transmission rate as well as extremely low power consumption. This will be the first long-term crustal deformation measurement on the sea floor.  相似文献   

区域海洋立体监测系统潜在经济效益     

林千红 《台湾海峡》2006,25(1):130-138

区域海洋立体监测系统的建立旨在提供全面的、系统的海洋动力环境和生态环境信息共享资料，为区域性海洋防灾减灾和海洋环境管理提供实时信息的网络平台．本文通过费一效分析的方法，初步测算了台湾海峡及毗邻海域海洋动力环境实时立体监测系统潜在的年经济效益超过29692．8万元，对区域海洋管理的决策具有重要意义．  相似文献