可持续发展是海水养殖业兴衰的关键

海带筏式人工养殖在５０年代形成产业化以来,我国海水养殖获得全面发展。最有影响当属海藻、对虾和扇贝以及最近涌起的网箱养鱼热潮。它们都是科研成果转化为生产力的结果,对推动海水养殖业的发展和地方经济的发展都起着重要作用。截止１９８９年,我国海带产量达２７００００ｔ,居世界首位;对虾产量在１９８８年达１９０００ｔ,居世界首位;扇贝产量在１９８８年达１９００００ｔ［１］。近几年,海洋鱼类养殖又获得更加飞速的发展,将有力地推动我国海水养殖业（尤其海洋鱼类）的迅速发展,并对全国产生重要的影响。根据以往的成功经…     

Characteristics of nitrogen forms in the southern Huanghai Sea surface sediments

The distributions of different forms of nitrogen in the surface sediments of the southern Huanghai Sea are different and affected by various factors. The contents of IEF-N, SOEF-N and TN gradually decrease eastward, and those of SAEF-N northward, while those of WAEF-N westward. Around the seaport of the old Huanghe (Yellow) River, the contents of both SOEF-N and TN are the highest. Among all the factors, the content of fine sediment is the predominant factor to affect the distributions of different forms of nitrogen. The contents of IEF-N, SOEF-N, and TN have visibly positive correlation with the content of f‘me sediments, and the correlative coefficient is 0.68, 0.58 and 0.71 respectively, showing that the contents of the three forms of nitrogen increase with those of f-me sediments. The content of WAEF-N is related to that of fine sediments to a certain extent, with a correlative coefficient of 0.35; while the content of SAEF-N is not related to that of fine sediments, showing that the content of SAEF-N is not controlled by fine grain-size fractions of sediments. In addition, the distributions of different forms of nitrogen are also interacted one another, and the contents of IEF-N and SOEF-N are obviously affected by TN, while those of inorganic nitrogen (WAEF-N, SAEF-N and IEF-N) are not affected by SOEF-N and TN obviously, although they are interacted each other.     

东太湖及其网围养鱼区的底栖动物以及环境质量的初步评价与区划

本文初步分析了东太湖及其网围养鱼区的底栖动物的种类组成、数量、生物量、多样性及其分布特点;选用三个生物数量指标:Good—night指数、King和Ball指数以及颤蚓类密度。运用系统模糊聚类方法,对网围养鱼区的环境质量作出初步评价和区划;论述了在东太湖适当地开展网围养鱼并控制其规模的必要性,对如何控制网围养鱼所造成的污染提出初步建议,供有关部门参考。     

盐碱地养鱼

在甘肃酒泉地区试验田里,上海科研人员历经3年,靠养鱼、种草等科学方法,让白花花的不毛之地肥了、绿了。经测算,仅盐碱地池塘养殖的亩产效益就达1000元,并形成一种盐碱地改良新模式,具有良好应用推广价值。     

关于漂游口丝虫[Costia necatrix （Henneguy 1883）]的分类地位和种的比较

漂游口丝虫从最初描述至今已近百年了，它为害各种淡水鱼类，遍布世界养鱼地区，是淡水鱼幼鱼种较为常见的体外寄生鞭毛虫。可是长期来有关其分类地位则颇多争议，至今尚未取得一致意见。本文就笔者的观察，结合国内外学者的研究进展，作一综述，以便引起对此有兴趣的学者的进一步探讨。本文蒙陈启鎏、熊大仁两教授审阅，黄文浩付教授代为翻译有关文献，笔者一并表示谢意。     

大力加强海洋生物技术的研究

我们即将进入海洋世纪。海洋生物技术或海洋生物工程自从８０年代起就受到科学家的重视,发展一直非常迅速。第四届国际海洋生物技术会议去年在意大利召开,进行了５个大会讲演（Ｋｅｙｎｏｔｅｌｅｃｔｕｒｅ）,由著名科学家、斯坦福大学教授Ａ．Ｋｏｒｎｂｅｒｇ等５人做了报告;此外,还有８场小组报告会（Ｏｒａｌｓｅｓｓｉｏｎ）,４场登贴报告会（Ｐｏｓｔｅｒｓｅｓｓｉｏｎ）和１１个讨论会（Ｗｏｒｋｓｈｏｐ）。参加会议的有１０００多人,仅摘要集就有３６１页之多。这个会议的首次预备会议是１９８９年在日本东京召开的,当时…     

老虎落泪——老虎岭

老虎岭,位于南宁市郊北部邕武公路10千米处。关于老虎岭的地名还有一个动人的传说。相传在很久以前,附近大邓村有个姓林的农民养鱼时还养了一只老虎。那老虎通晓人性,能看守家园。因为经常有人偷他的鱼,农民就把老虎带去看守鱼塘,告诉它：“在夜里,你听见木屐声走来的,是你的主人;听到布鞋声走来的,是偷鱼的人,要把它咬死。”老虎看守鱼塘后,再没有人敢来偷鱼。     

私挖鱼塘被制止 农田原貌已恢复——潢川县及时制止一起占用农田挖鱼塘事件

日前,潢川县国土资源局执法监察大队成功制止一起擅自占用基本农田挖塘养鱼案件,占用的10亩基本农田已被恢复。