Effects of dietary β-glucan and glycyrrhizin on non-specific immunity and disease resistance of the sea cucumber (<Emphasis Type="Italic">Apostichopus japonicus</Emphasis> Selenka) challenged with <Emphasis Type="Italic">Vibrio splendidus</Emphasis>

Sea cucumbers, Apostichopus japonicus Selenka, were fed diets containing non-immunostimulant (basal diet), 0.2% β-glucan and 0.02% glycyrrhizin in a recirculatory water system for 45 days, and subsequently challenged with Vibrio splendidus by injection at 1.0×10⁸ cfu / sea cucumber for 15 days. Phagocytic capacity (PC), intracellular superoxide anion production (ISAP), lysozyme (LSZ) activity and superoxide dismutase (SOD) activity in the coelomic fluid were analyzed on the 0^th, 5^th, 10^th and 15^th days after injection. Results showed that after the 45-day feeding period, PC, ISAP, LSZ activity and SOD activity in sea cucumbers fed with dietary β-glucan or glycyrrhizin were significantly higher than in those fed with the basal diet. On the 5th day after infection, all the immune parameters examined in the sea cucumbers injected with V. splendidus decreased in value significantly. On the 15^th day, PC, ISAP and LSZ activity returned to levels similar to those on the 0^th day. For the sea cucumbers injected with saline, there were no significant differences in all the immune parameters examined and in the cumulative morbidity during the 15-day challenging trial. After injecting with V. splendidus, the cumulative morbidity of sea cucumbers fed with the basal diet was significantly higher than those fed with dietary β-glucan or glycyrrhizin when challenged with V. splendidus challenged sea cucumber fed with the basal diet was significantly higher than those fed with dietary β-glucan or glycyrrhizin. There was no significant difference in cumulative morbidity between the dietary β-glucan and glycyrrhizin treatments over time.     

Study on the dominant species of Pteropoda in East China Sea

1 INTRODUCTION Pteropoda is a group of marine pelagic mol- lusks, which belongs to Opisthobranchia of Gastro- poda. Although Pteropoda is not a major group in pelagic zooplankton in terms of abundance and number of species, their ecological characters are…     

Spatial correlation and ecological characteristics analysis of management area for biodiversity conservation and relevant regionalization

Formulation of different ecological zone plans according to the corresponding protection targets and the necessity of proper conservation policy is one of the measures to achieve the goal of ecological conservation in China.In order to clarify the interrelation among key ecological zone plans,this paper carried out the research on spatial relation of priority areas of biodiversity conservation and three key ecological areas（key ecological function areas,key regions of ecological service function,national nature reserves） and the research on ecological conditions,based on multi-scale ecological spatial theme information,which incorporates elements like ecologi-cal quality and type,and by the aid of spatial information analysis and GIS modeling.The results showed a contrastively fine spatial consistency with 68.8% of priority areas of biodiversity conservation overlapping with three key ecological areas.Although the envi-ronment in priority areas of biodiversity conservation were in good conditions,protection pressure is also increasing,powerful supervi-sion and protection should not be ignored.The environmental conditions in the overlapping areas,as a whole,were superior to those in the non-overlapping areas.Since two areas have different characteristics,targeted protection measures should be formulated based on this difference,which will be very important for biodiversity conservation in priority areas of biodiversity conservation.     

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中子活化测井原位测定氟化钙含量技术及应用

在萤石矿勘探工作中,因为萤石性脆,在钻探过程中易破淬,岩(矿)芯采取率难以达到要求。当萤石与硬岩石共存时,因选择性磨损,以及萤石分布不均匀等原因,使矿芯分析结果失去了代表性。中子活化测井工作的目的,是在钻孔中原位测定CaF_2含量,以弥补钻探取芯分析资料的不足,提高地质工作质量。根据方法原理,研究了适应连续测井方式及定点测量方式的技术条件和资料解释方法。对萤石矿可达到三定(定矿层、定位置、定厚度)和计算CaF_2含量的目的,工作效率可达到常规测井水平,含量测定精度、灵敏度和准确度均可满足萤石矿地质普查、勘探的要求。     

海洋微型和小型底栖生物相互作用研究综述

The microscopic organisms from sediments are classified into microbenthos and meiobenthos. The former groups are usually referred to protozoa, microalgae and bacteria, whereas the latter comprise micrometazoa defined by mesh-size. Micro- and meiobenthos have been suggested as being one complex and are characterized by their small size, relative short life spans, high turnover rate, and complicated trophic structure. The quantification of the exchange rate of carbon seems a prerequisite for understanding the processes regulating the trophic structure in this complex, where the basic interactions of micro- and meiobenthos include nutrition, competition, synergy and inhibition, etc. The ecological processes mediating the interactions between these groups are poorly understood and invite our attention to more detailed studies. In this paper, we summarize literature data to outline the interactions of the two major assemblages and discuss the main progress in benthic microbial food web.     

Study on transmission mechanism of thermal infrared remote sensing for abrupt geothermal anomaly in volcanic region

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Landscape ecological construction and biodiversity protection

Ｌａｎｄｓｃａｐｅｅｃｏｌｏｇｙ,ｐｒｏｄｕｃｅｄｂｙａＧｅｒｍａｎｎａｍｅｄＣ．Ｔｒｏｌｌｉｎ１９３９,ｗｅｎｔｔｏｒｅｓｕｒｒｅｃｔｉｏｎｉｎｔｈｅ１９８０ｓａｆｔｅｒｈａｖｉｎｇｗａｖｅｒｅｄｆｏｒｏｖｅｒｆｏｒｔｙｙｅａｒｓ,ａｎｄｎｏｗｉｔｈａｓｂｅｅｎａｎｉｍｐｏｒｔａｎｔ,ｃｏｍｐｌｉｃａｔｅｄａｎｄｃｏｍｐｒｅｈｅｎｓｉｖｅｃｒｏｓｓｄｉｓｃｉｐｌｉｎｅ．Ｉｎｔｈｅ２１ｓｔｃｅｎｔｕｒｙ,ｔｈｅｓｏｃｉａｌｓｕｓｔａｉｎａｂｌｅｄｅｖｅｌｏｐｍｅｎｔｗｉｌｌｂｅｔｈｅｍａｊｏ…     

广西军事体育学校膨胀岩山体滑坡整治的反思

膨胀岩（土）病害是一种特殊的工程地质现象。文章通过对广西军体校膨胀岩山体滑坡的整治经验进行总结,探讨其成因机理,提出对整治设计的一些看法