双斑东方鲀人工繁殖及育苗技术   总被引：5，自引：2，他引：5  

钟建兴  许鼎盛  陈有铭  郑惠东 《台湾海峡》2002,21(3):305-309

本文报道了福建省水产研究所 2 0 0 1年双斑东方人工繁殖及育苗过程与结果 .在春季当海水水温达到 1 6℃以上时 ,用DOM、LRH A3或HCG进行催产 ,混和或单一使用 ,剂量视亲鱼性腺成熟度而定 .受精卵在水温 1 8.0～ 2 2 .4℃、盐度 2 2 .1～2 8.6条件下 ,经 1 1 7～ 1 56h孵化 .用 2 0 5万尾开口仔鱼培育出平均全长为 3 7mm ,平均体重为 1 .3 g的鱼苗 52 .3 5万尾 ,成活率 2 5.5%.此外 ,对亲鱼的暂养、催产、受精卵的孵化、仔鱼的前期培育和后期培育等关键环节进行了探讨 .  相似文献   

不同年度收存的褶皱臂尾轮虫休眠卵的孵化及滞育胚胎“激活”效果的研究   总被引：3，自引：0，他引：3  

周利  相建海  郑严 《海洋与湖沼》2002,33(6):648-656

比较了 1 985— 1 998年间由同一褶皱臂尾轮虫 (Brachionusplicatilis)种群在实验室内历年产生并收存的休眠卵的孵化效果 ,并初步探讨了胚胎“激活”处理对孵化的影响。结果表明 ,休眠卵的收存年度或时间对其在一定孵育期内的总孵化率 (THR)和日孵化率 (DHR)有极显著影响 (x2 检验 ,p<0 .0 0 1 ) ,但THR和DHR与储存时间间均无显著的相关性 ,而是呈极大波动。同时发现“激活”作用具有促使孵化高峰提前到来、增强孵化同步性的双重功效 ,从而可明显缩短孵育时间 ,提高孵化速率。但“激活”前后多数卵样的总孵化率无显著变化 (p >0 .0 5 )。详细讨论了可能导致孵化率波动的多种因素 ,例如遗传变异、培养历史、储存及孵化的环境条件等。  相似文献   

福建海岛潮间带软体动物群落分布特征   总被引：1，自引：0，他引：1  

周时强  黄凌风  郭丰  郑怀平 《海洋科学》2001,25(8):5-8

福建海岛潮间带软体动物共鉴定248种，隶属于5纲78科161属，应用群落系数，等级聚类分析和极坐标排序研究软体动物落分布，结果表明，软体动物群落可分为3种类型，即河口型群落，近岸港湾群落和开阔海域群落，群落分布与海岛所处地理位置及其生境类型密切相关，盐度和水动力是重要的影响因子。  相似文献   

大鹏湾潮流数值计算   总被引：2，自引：8，他引：2  

王学昌  娄安刚  孟伟  郑丙辉  王增田 《海洋科学》2001,25(12):37-40

应用分步杂交方法建立了大鹏湾边界潮流数值模型，并对其进行了模拟计算，重现了该区域潮波及潮流的分布规律，并根据实测资料对其进行了验证，从而可系统地了解这一海区的潮波系统及潮流场等海洋要素的分布情况。  相似文献   

厦门海洋生物入侵的危害及管理对策   总被引：4，自引：1，他引：4  

郑冬梅 《台湾海峡》2005,24(3):411-416

本文系统地分析了厦门海洋生物入侵的成因、现状、危害及治理方法,认为互花米草和海洋动物沙筛贝是主要的入侵物种,其严重的生态、经济和社会危害不可低估.同时明确防止海洋生物入侵的总体目标,进而提出强化管理的系列对策.  相似文献   

Photoinduced toxicity single and binary mixtures of four polycyclic aromatic hydrocarbons to the marine diatom Skeletonema costatum   总被引：1，自引：0，他引：1  

MENG Wei  WANG Liping  ZHENG Binghui 《海洋学报(英文版)》2007,26(6):41-50

Diatom Skeletonema costatum Cleve is one of the main predominant phytoplankton species in the Changjiang Estuary in China. In order to provide some basic information for future assessment of the potential risk on phytoplankton communities in this estuary caused by polycyclic aromatic hydrocarbons(PAHs), this alga was selected as a representative to investigate the photoinduced toxicity of PAHs, in single and mixture. Four PAHs including three-ring phenanthrene and anthracene, four-ring fluoranthene and pyrene were tested in the laboratory. The single toxicity of each PAH on this microalga was compared with and without the simulated solar UV radiation. The results showed that this microalga was sensitive to PAH's photoinduced toxicity. Ratios of the 72 h median effect concentration obtained for fluorescent and UV light tests were about 8.4 for phenanthrene, 13.0 for anthracene, 6.5 for fluoranthene, and 5.7 for pyrene, indicating that UV light enhanced the PAH toxicity to this alga significantly. Under the fluorescent radiation (lacking UV), the dose-response curves based on chemical concentrations revealed that the order of toxic strength was fluoranthene greater than pyrene greater than anthracene greater than phenanthrene; while under the UV radiation (476 μW/cm2 for UVA, 6.5 μW/cm2 for UVB) it became fluoranthene approximately equaling anthracene greater than pyrene greater than phenanthrene, indicating that the UV light also changed its relative toxicity to this alga. The photoinduced toxicity of PAHs to the marine diatom S. costatum might be a synergistic effect of photosensitization reactions (e.g., generation of single-state oxygen) and photomodification (photooxidation and/or photolysis).The combined effects of six binary mixtures on the marine diatom S. costatum were investigated using the additive-index method. Four binary-mixtures (phenanthrene plus anthracene; phenanthrene plus pyrene; anthracene plus fluoranthene; anthracene plus pyrene) were found to be synergistic joint action mode, while two binary-mixtures (phenanthrene plus fluoranthene; fluoranthene plus pyrene) displayed antagonist, revealing a complex pattern of possible interactions. The combined action mode of PAHs might be related to various factors such as the mixture compounds, mixture ratios and test conditions, etc.  相似文献   

Nonlinear tidal waves in a kind of estuary with gradually varying cross-section     

Du Yong  Chen Zongyong  Ye Anle 《海洋学报(英文版)》1990,9(1):37-50

-Nonlinear tidal waves in a kind of estuary are studied in the paper using one-dimensional nonlinear hydrody-namic equations with friction. The estuary has exponentially varying width B=B0 e-bx and uniform depth h. The one-dimensional hydrodynamic equations are solved by perturbation method. It was found that our solution included two special cases, Pelisenpeki's solution and Airy's solution. The former can be got by letting b=0 in our solutions, and the latter by setting 6 = 0 and f= 0 (f is linear frictional coefficient). In terms of the second-order solution, the physical mechanism of nonlinear tidal waves in estuaries with gradually varying cross-section is explored. It is shown that, under the assumption of linear friction coefficient, shallow water constituent waves consist of two parts, one is produced by shallow water nonlinear effect outside the estuary, the other is generated by shallow water nonlinear effect inside estuary. In addition, the physical mechanism of the residual tidal current and  相似文献   

养殖对虾病毒性疾病的细菌并发症防治研究   总被引：1，自引：0，他引：1  

苏国成  陈金翠 《台湾海峡》1996,15(2):200-204

本文研究报道了发病对虾肝胰腺分离菌物敏感性，采用防台细菌人工感染方法进行药物饲料的筛选，在实验室及养殖池中进行药物饲料的防治效果试验。结果表明，在对虾病毒流行期间，采用药物饲料可有效防止对虾爆发性大量死亡，提高对虾存活率。  相似文献   

青海湖全新世植被演变及气候变迁：QH85—14C孔孢粉数值分析   总被引：20，自引：3，他引：20  

孔昭宸  山发寿 《海洋地质与第四纪地质》1990,10(3):79-90

本文应用青海湖QH85-14C孔取得的具有~(14)C测年数据所支持的原始孢粉资料,进行数值分析(有序聚类、主成份分析、滑动平均和回归分析)。从而对青海湖区11000年以来的植被和气候变化进一步讨论。  相似文献   

0010号台风"碧利斯"对厦门港湾表层海水中溶解无机砷含量的影响     

李俊  郑佩如  杨逸萍  胡明辉 《台湾海峡》2002,21(4):404-410

本文研究了0010号台风“碧利斯”影响期间及其随后的恢复期中,厦门港湾中九龙江口和西港海域站表层海水总溶解砷（TDIAs)、As^3 含量和As^3 /As^5 值的变化特征。结果表明,观测期间两站TDIAs和As^5 含量均比非台风时期呈数倍增加,经10d后仍未恢复到非台风时的水平。As^3 含量也有较大幅度的增加,但波动较大。文中还对观测期间影响溶解无机砷含量的因素进行了初步的探讨。  相似文献