武汉东湖不同湖区浮游甲壳动物群落结构的比较   总被引：6，自引：0，他引：6  

鲁敏  谢平 《海洋与湖沼》2002,33(2):174-181

对武汉东湖 4个不同营养水平和不同滤食性鱼类密度的湖区 1 993— 1 998年期间的浮游甲壳动物群落结构进行了比较研究。结果表明 ,营养水平及滤食性鱼类的密度以Ⅰ、Ⅱ、Ⅲ、Ⅳ站的次序依次下降 ;各站间浮游甲壳动物总生物量及各类群 (枝角类、剑水蚤和哲水蚤 )的生物量差异较大 ,并且哲水蚤相对于剑水蚤的优势度以Ⅰ、Ⅱ、Ⅲ、Ⅳ站的次序上升。浮游甲壳动物优势种结构在Ⅰ、Ⅱ站与Ⅲ、Ⅳ站间的差异尤为明显 :近邻剑水蚤与微型裸腹生物量在营养水平及鱼类生物量高的Ⅰ、Ⅱ站显著较高 ,而盔型透明的生物量在营养水平及鱼类生物量较低的Ⅲ站显著较高 ,表明水体的营养水平及滤食性鱼类的捕食压力是导致浮游甲壳动物群落在东湖不同湖区具有不同分布格局的重要因素  相似文献   

鱼类孵化酶的研究进展及其应用前景   总被引：15，自引：0，他引：15  

樊廷俊  史振平 《海洋湖沼通报》2002,(1):48-56

自上世纪以来，各国学者均开展了鱼类孵化酶领域的研究工作，包括鱼类孵化过程中孵化腺细胞的超微结构、孵化酶的生化特性、孵化酶基因的表达及其调控机制、孵化酶合成与分泌的影响因素等，取得了可喜的研究进展。本文谨以该领域的最新研究进展为基础，对鱼类孵化酶的研究现状及其应用前景进行综述。  相似文献   

The incidence of reared Atlantic salmon (Salmo salar L.) of fish farm origin at West Greenland     

Hansen  L. P.; Reddin  D. G.; Lund  R. A. 《ICES Journal of Marine Science》1997,54(1):152-155

  相似文献   

Nitrite-induced enhancement of toxicity of phenanthrene in fish and its implications for coastal waters     

M. S. Shailaja  A. Rodrigues 《Estuarine, Coastal and Shelf Science》2003,56(5-6):1107-1110

Coastal areas are prone to varying degrees of anthropogenic chemical contamination. In many coastal environments experiencing reducing conditions in the water column, nitrite is produced as a result of denitrification. With a view to determining the effect of a natural stress such as the presence of nitrite in water on the xenobiotic metabolism in fish, the euryhaline cichlid Oreochromis mossambicus was exposed for up to 9 days to environmentally relevant concentrations of water-borne nitrite and phenanthrene, a polycyclic aromatic hydrocarbon.Analyses of different biomarkers in the treated fish indicated significant increase in the metabolism of phenanthrene as a result of exposure to nitrite. For example, the activity of the biotransformation enzyme measured as 7-ethoxyresorufin-O-deethylase activity was, in the presence of 1 μM nitrite, nearly twice that produced by phenanthrene alone. Similarly, biliary fixed fluorescence values reflecting phenanthrene and its metabolites were rendered 1.7 times higher when exposed simultaneously to nitrite. Contact with nitrite and phenanthrene together also led to severe hepatic damage with possible cell death as inferred from the large enhancement in sorbitol dehydrogenase activity in the serum and reduced liver somatic index.  相似文献   

河北省沿海8个经济鱼种的饵料组成及其相互关系的研究     

孙介华  刘宏春 《海洋湖沼通报》1991,(2):89-94

本文分析了河北省沿海小黄鱼、黄姑鱼、蓝点鲅、牙鲆、半滑舌鳎、鲈鱼、鯒鱼和孔鳐的饵料组成及其相互关系。主要结果有:(1)在饵料组成中,主要的饵料生物是日本鼓虾、脊尾褐虾、虾蛄、中国毛虾、黄鲫、日本鳀鱼、钝尖尾鰕虎鱼和尖尾鰕虎鱼等,这些主要饵料生物基本上都是群众渔业的重要捕捞对象;(2)种间存在不同程度的饵料竞争关系;(3)捕食与被捕食关系分别存在于鲈鱼与小黄鱼、鲈鱼与半滑舌鳎、鯒鱼与小黄鱼的种间。本文从饵料保障的角度,探讨了上述8个经济鱼种资源的恢复与其饵料生物资源的渔业捕捞之间的关系。  相似文献   

Influence of Velocity and Types of Beam Trawl Towing on Deep-Sea Demersal Fish and Decapod Crustacean Samples   总被引：3，自引：0，他引：3  

Hsin-Ming Yeh  Suguru Ohta 《Journal of Oceanography》2002,58(3):505-517

The sampling efficiency of two types of beam trawl towed at different velocities was compared when sampling deep-sea demersal fish and decapod crustaceans. The trawls were a Sigsbee-Agassiz type of 2 m span, and an Oregon type of 3 m span. The different hauls caught by the Oregon type beam trawl of 3 m span towed at 1.5 knot (3m 1.5 kt), the Oregon type towed at 0.8 knot (3m 0.8 kt) and the Sigsbee-Agassiz type towed at 1.5 knot (2m 1.5 kt) were compared by analysis of variance (ANOVA), the Tukey test, cluster analysis based on Morisita-Horn index, and correspondence analysis. The minimum viable sample size was determined by a randomization test. For demersal fish, the type of gear used had more influenced on the samples obtained than the towing velocity. For decapod crustaceans, no significant difference was detected between different trawls towed at different velocities. The common idea that if these types of trawl are towed at 1 knot or more, they cannot efficiently sample epifauna, but demersal fish can be well sampled, should be abandoned. The samples of demersal fish caught by 3m 1.5 kt revealed the greatest consistency and lowest variation than the others. We recommend using an Oregon type beam trawl of 3 m span towed at 1.5 knot as an ordinary deep-sea sampling device. Only a single successful haul or a sample size of 52 individuals was sufficient for estimating demersal fish diversity, but at least two successful hauls or a sample size of 54 individuals were needed for decapod crustaceans. If possible, seven successful hauls or a sample size of 189 individuals of decapod crustaceans are recommended for community study. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

Seasonal variation in the consumption of food by fish in the North Sea and implications for food web dynamics   总被引：7，自引：3，他引：7  

Greenstreet  Simon P. R.; Bryant  Andrew D.; Broekhuizen  Niall; Hall  Stephen J.; Heath  Mike R. 《ICES Journal of Marine Science》1997,54(2):243-266

  相似文献   

Effects of otter trawling on macrobenthos and management of demersal scalefish fisheries on the continental shelf of north-western Australia   总被引：1，自引：0，他引：1  

Moran  M. J.; Stephenson  P. C. 《ICES Journal of Marine Science》2000,57(3):510-516

  相似文献   

纤毛虫诱导鱼类免疫反应的研究   总被引：3，自引：0，他引：3  

周丽  战文斌  宋春华 《海洋湖沼通报》2001,(4):38-43

本文综述了纤毛虫诱导鱼类发生免疫反应的类型，免疫反应机制以及纤毛虫疫苗的研究现状。鱼类对纤毛虫诱导产生免疫反应的研究多集中在小瓜虫诱导鱼类免疫反应的研究。鱼类对瓜虫免疫保护机制已基本弄清且已成功研制出小瓜虫疫苗，这是目前唯一的应用于实验室的寄生原生动物疫苗。  相似文献   

Influence of trawling on in situ estimates of Cape horse mackerel (Trachurus trachurus capensis) target strength     

Barange  Manuel; Hampton  Ian 《ICES Journal of Marine Science》1994,51(1):121-126

  相似文献