Long-Term Investigation of Spatio-Temporal Variations in Faunal Composition and Species Richness of Megabenthos in Ise Bay,Central Japan

Based on our long-term data from megabenthos sampling from 1993 to 2002 in Ise Bay, central Japan, we examined spatio-temporal variations in taxon composition, species richness and its distribution of megabenthos in the bay in relation to the occurrence of the oxygen-poor water (i.e. oxygen content less than 3 ppm) in bottom waters of the bay. A total of 261 species were identified including 6 cnidarians, 1 tentaculate, 5 annelids, 71 molluscs, 72 crustaceans, 16 echinoderms, 12 urochordates and 78 pisces. Of the most abundant 10 megabenthos species, the following 4 species of echinoderms made up more than the half of megabenthos biomass: Luidia quinaria, Echinocardium cordatum, Asterias amurensis and Astropecten scoparius. Species richness of megabenthos varied significantly between seasons and among stations. The severity and period of occurrence of the oxygen-poor water developing every summer play an important role in determining spatial distributions of species richness in the bay.     

山东省大中型水库浮游生物研究──Ⅰ．浮游动物生态

报道１９８９～１９９０年山东省３０多个大中型代表水库浮游动物的种类组成，种类频级、优势类群。主要种和生物量；统计分析掠食性与植食性浮游动物生物量，浮游动物与浮游植物生物量及浮游动物与代表水库营养状态指标的总磷，透明度和深度的关系。提出浮游动物个体越小，其生物量与水库营养水平关系越密切。     

Paraconchoecia diacanthus n. sp., a new species of planktonic Ostracoda

Ｐａｒａｃｏｎｃｈｏｅｃｉａｄｉａｃａｎｔｈｕｓｎ．ｓｐ．,ａｎｅｗｓｐｅｃｉｅｓｏｆｐｌａｎｋｔｏｎｉｃＯｓｔｒａｃｏｄａ￥ＣｈｅｎＲｕｉｘｉａｎｇａｎｄＬｉｎＪｉｎｇｈｏｎｇ（ＲｅｃｅｉｖｅｄＡｐｒｉｌ１６,１９９３１ａｃｃｅｐｔｅｄＪｕｌｙ２０...     

赤潮生物种类特征光谱获取技术

较为系统地研究了赤潮生物水体反射率曲线获取方法。通过对 2类反射率反演方法得出的反射率曲线与实际反射率曲线进行比较 ,得出在不具备大气环境参数的情况下 ,经验线性法的反演结果与实际反射率曲线最接近的结论 ,并进一步对正常海水和赤潮生物水体的光谱特性进行分析 ,提取出赤潮生物水体的特征光谱。这是进行赤潮监测和识别的重要前提     

One new species of free-living marine nematodes (Enoplida,Anticomidae, Cephalanticoma) from the Huanghai Sea

One new species of free-living marine nematodes Cephalanticoma filicaudata sp. nov. from the Huanghai Sea, China is described and illustrated. Cephalanticoma filicaudata sp. nov. is characterized by well developed cephalic capsule, three teeth at the anterior of oesophagus, excretory pore opens posterior to cervical setae, only two cervical setae per file, body length longer than 5 200 μm, tail long and no ventral-lateral seta between the supplement and the cloacal opening. Types are deposited in the College of Marine Life Sciences, Ocean University of China.     

亚洲海域鲎的种类和分布

审核有关亚洲海域鲎种类和分布的历史文献发现,亚洲海域只有圆尾鲎Carcinoscorpius rotundicauda、中国鲎Tachypleus tridentatus和南方鲎Tachypleus gigas3种鲎分布。圆尾鲎分布于中国香港、北部湾、雷州湾以南、印度尼西亚爪哇岛北岸以北、菲律宾南部以西和恒河河口印度东北部以东的海域。中国鲎分布于长江口以南的中国海域、日本濑户内海、九州岛北岸以南、印度尼西亚爪哇岛北岸以北、苏门答腊岛印度洋侧以东和苏拉威西岛以西的海域。南方鲎分布于越南西贡以南、爪哇岛北岸以北、菲律宾南部以西的太平洋海域及印度恒河印度东北部以东的印度洋海域。以前有关中国北部湾海域和香港海域有南方鲎的报道是错误的,把中国鲎的幼体及成体误当成了南方鲎。中国海域只有中国鲎和圆尾鲎2种鲎分布。中国的海南、广西、广东西部和香港(可能还包括台湾)等是圆尾鲎分布的海域。其沿岸要严禁食鲎,以防误食圆尾鲎而引起河豚毒素中毒。     

藻体海水培养液中铜的化学存在形式

采用金属络合物通式模型,在IBM-PC计算机上计算了不同pH(7.5～9.5)、碱度(2.3～2.5mmol dm~(-3))和加入不同浓度的铜离子(1.0×10~(-4)～1.0mg dm~(-3))条件下,海水培养液中铜的主要化学存在形式分配的百分数。还给出了计算机程序框图和主要化学存在形式含量的百分数随pH、碱度和铜浓度变化图。