西北太平洋环境变化对柔鱼冬春生群体资源丰度的影响     

余为  陈新军  陈勇  易倩  张扬 《海洋学报(英文版)》2015,34(8):43-51

During 1995–2011, annual production of winter-spring cohort of Ommastrephes bartramii for Chinese squidjigging fishery has greatly fluctuated, which is closely related to the environmental conditions on the spawning and fishing grounds. To better understand how squid recruitment and abundance were influenced by ocean environmental conditions, biological and physical environmental variables including sea surface temperature(SST), SST anomaly(SSTA), chlorophyll a(Chl a) concentration and the Kuroshio Current were examined during years with the highest(1999), intermediate(2005), and lowest(2009) catches. Catch per unit effort(CPUE) of the squid-jigging vessels was used as an indicator of squid abundance. The results indicated that high SST and Chl a concentration on the spawning ground in 1999 resulted in favorable incubation and feeding conditions for squid recruitment. Whereas the suitable spawning zone(SSZ) in 2009 shifted southward and coincided with low SST and Chl a concentration, resulting in a reduction in the squid recruitment. The small difference of SSZ area in the three years suggested the SSZ provided limited influences on the variability in squid recruitment. Furthermore,high squid abundance in 1999 and 2005 was associated with warm SSTA on the fishing ground. While the cool SSTA on the fishing ground in 2009 contributed to adverse habitat for the squid, leading to extremely low abundance. It was inferred that strengthened intensity of the Kuroshio force generally yielded favorable environmental conditions for O. bartramii. Future research are suggested to focus on the fundamental research on the early life stage of O. bartramii and mechanism of how the ocean-climate variability affects the squid abundance and spatial distribution by coupling physical model with squid biological process to explore transport path and abundance distribution.  相似文献   

中太平洋海盆多金属结核分布及其与CC区中国多金属结核开辟区多金属结核特征对比   总被引：2，自引：0，他引：2  

王海峰  刘永刚  朱克超 《海洋地质与第四纪地质》2015,(2):73-79

在综合分析航次调查资料的基础上,总结了中太平洋海盆多金属结核的矿产资源特征与分布规律,并与CC区中国多金属结核开辟区结核特征进行对比。结果发现:CP区多金属结核以S型水成成因为主,具有较高的丰度与覆盖率,但品位较低;而CC区结核S型(西区)、S+R型、R型(东区)三者均有,以混合成因和成岩成因为主,尽管丰度、覆盖率稍低,但品位较高。多金属结核中锰相矿物差异、表层沉积物类型及南极底流的影响是造成两区多金属结核差异的主要因素。  相似文献   

西北太平洋多源微波辐射计海表温度数据交叉比对分析   总被引：2，自引：1，他引：2  

奚萌  宋清涛  林明森  李文君 《海洋学报》2016,38(7):32-47

海表温度产品是研究全球海洋大气系统的重要数据源,在海洋相关领域的研究和应用方面具有重要价值。以西北太平洋海域为研究区域,本文对2013年和2014年3个微波辐射计海表温度产品(AMSR-2,TMI和WindSat)的产品特性和Argo浮标进行了真实性检验,并对3个传感器数据进行了交叉比对分析,具体涉及海表温度分布、温度梯度分布、观测点分布、匹配点分布、平均偏差分布、均方根误差分布、统计分析结果的逐月演变和海表温度误差棒分析。结果表明,3个微波辐射计在空间尺度上都能比较一致地反映西北太平洋海域的海表温度变化趋势。但遥感数据与浮标数据却存在季节性变化和昼夜差异,其中冬季微波数据与浮标数据的平均偏差和均方根误差较小,降轨数据与浮标数据的结果更接近。AMSR-2的海表温度数据质量比TMI和WindSat的海表温度数据更接近Argo数据。相比于WindSat和TMI,AMSR-2和TMI的海表温度数据质量更为接近,但是由于受到近岸陆地信号干扰,AMSR-2和TMI离岸100 km以内海域的数据应当慎用。  相似文献   

印尼贯穿流与南海贯穿流的年代际变化特征及机制   总被引：5，自引：0，他引：5  

刘钦燕  王东晓  谢强  黄企洲 《热带海洋学报》2007,26(6):1-6

通过绕岛环流理论和SODA(Simple Ocean Data Assimilation)数据对印尼贯穿流(ITF)和南海贯穿流(即吕宋海峡水交换,LST)在1976年气候突变前后的特征进行分析。结果表明,1976年后吕宋海峡水交换体积输送(LSTT)异常增大,而印尼贯穿流体积输送(ITFT)异常减少。吕宋海峡东部东风分量和南海内部的北风分量的局地驱动是导致LSTT在1976年后增加的主要因素,南海内部异常北风分量对LSTT增加的贡献能够达到53%;而赤道太平洋的西风分量则是导致ITFT在1976年后减少的主要因素,其贡献大约为61%。1976年后15°N左右的NEC(North Equatorial Current)体积输送异常增强,但总NEC体积输送异常减弱。KC(Kuroshio Current)体积输送异常增强,而MC(Mindanao Current)、NECC(North Equatorial Countercurrent)、SEC(South EquatorialCurrent)体积输送异常减弱。赤道西太平洋由风场变化通过Sverdrup动力过程产生的异常气旋性环流阻碍了太平洋水体向印度洋的输入。  相似文献   

何以称“下加利福尼亚半岛”     

刘伉 《地图》2010,(2):138-139

2009年9月初,生成于东太平洋的“希梅纳”飓风,以赶超千军万马的声势扑向墨西哥海岸,而首当其冲的就是形状奇特的下加利福尼亚半岛。这个本来很少在新闻电讯中露面的地方,突然“名声”大著。  相似文献   

视点     

《地图》2010,(5)

<正>万余塑料瓶造双体船穿越太平洋近期,一艘名为"普拉斯提基"(Plastiki)的双体船成功穿越太平洋到达澳大利亚港口城市悉尼。这艘船主要由一万多个可回收利用的塑料瓶建造而成,于今年3月从美国旧金山出发,在  相似文献   

新西兰纪行     

范建  樊星  纪康图 《中国测绘》2010,(3):64-71

位于南半球的新西兰．风景优美．环境宜人。但这个太平洋国家却与中国相距甚远。近年来．我国不少人去这个国家访问、工作、学习、生活和旅游．亲身领略到她的美景。笔者近日与家人以一个普通旅游者的身份来到这个国家,留下了难忘的印象。  相似文献   

2004年北太平洋柔鱼钓产量分析及作业渔场与表温的关系     

《广东海洋大学学报》2005,25(6):41-45

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Seasonal Variation of the Glycogen Enzyme Activity in Diploid and Triploid Pacific Oyster Gonad During Sexual Maturation     

KONG Lingfeng WANG Zhaoping YU Ruihai LI Qi WANG Rucai 《中国海洋大学学报(英文版)》2007,6(4):383-386

The glycogen content and the activities of two key enzymes in glycogen metabolism, glycogen phosphorylase and gly- cogen synthetase, in the gonad of diploid and triploid Pacific oysters (Crassostrea gigas) were compared during maturation. The glycogen content in the gonad of diploids decreased with gametogenesis (by 85.7%), but the glycogen content in the gonad of trip- loids did not vary significantly. Activity of glycogen phosphorylase (GP) in the gonad of diploids decreased with gametogenesis (by 55.5%), while GP activity of triploids did not vary significantly during maturation. Activity of glycogen synthetase (GS) in the gonad of diploids increased slightly with gametogenesis, reaching a peak in June. Activity of GS declined sharply from June to July, which might be due to gonad spawning. GS activity of triploid oysters in spawning time (July and August) was significantly higher than that in other months, which might be explained with a ‘compensating’ mechanism for the higher glycogen content in triploids.  相似文献   

图片新闻     

《黑龙江国土资源》2006,(8):F0002-F0002

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