FOREWORD PREFACE STUDIES ON LAKE FISHERY AND BIOLOGICAL PRODUCTIVITY Study on the techniques of increasing fishery production in the Caogang Lake and the underlying principle Liu Huoquan,Huang Gentian and Zhang Shuiyuan An analysis of fish yield in the Caogang Lake and the ecology of main economic fishes Huang Gentian,Liu Huoquan and Li Daofeng An experiment on large-sized fingerling cultivation through various ways Huang Gentian,Liu Huoquan and Li Daofeng Study on ecological relationship between grass carp and milfoil in the Caogang Lake Jin Gang and Liu Huoquan Physicochemical characteristics and fishery evaluation in the Caogang Lake Zhang Shuiyuan and Liu Ruiqiu On primary productivity of phytoplankton in the Caogang Lake Shen Guohua The zooplankton in the Caogang Lake and an assessment of potential production capacity of big head carp Wu Zhuotian On dynamics of the zoobenthos in the Caogang Lake and its fishery utilization Xiang Qihua Macrophytes in the Caogang Lake and their fishery utilization Jin Gang and Liu Huoquan An experiment of electric current driving-net collecting fishing method in the Caogang Lake Li Daofeng,Liu Huoquan and Huang Gentian STUDIES ON POND FISHERY AND PREVENTION OF FISH DISEASE Study on the techniques for increasing fish yield in pond in Fengqiu Experimental District Yang Xingqi,Liang Shaochang,Huang Wenyu,Yu Yi and Chen Yinghong Experiment on marketable fish culture in pond of Youfang Fish Farm in Fengqiu Experimental District Yang Xingqi,Liang Shaochang and Huang Wenyu Studies on the epidemic pattern of cultured-fish diseases and its relationship to the environment in Northern Henan Province Yu Yi,Liu Jianxiong,Yao Weijian,Yu Ping and Chen Yinghong APPENDIX Essential techniques for high production of marketable fish culture in pond in northern Henan Province Liang Shaochang,Yu Yi,Huang Wenyu,Chen Yinghong and Yang Xingqi Essential techniques for fry and fingerling rearing in pond in northern Henan Province Huang Wenyu,Liang Shaochang,Yu Yi,Chen Yinghong and Yang Xingqi
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