Gymnarchus niloticus swims by undulations of a long-based dorsal fin, while its body axis is in many cases held straight......

我国水产品存在“质量”引致城镇居民额外消费支出现象，论文以Deaton理论为依据，利用VECM模型研究了海／淡产品结构对额外“质量”支出......

本文描述了松辽盆地早白垩世沙河子组一登娄库组(别里亚士期-阿普第早期)淡水角藻类沟鞭藻囊孢4属、5新种和2个未定种,并对拟蝙蝠......

对采自重庆地区寄生于鲢、鳙及草鱼鳃上的5种外寄生车轮虫进行了形态学及分类学研究，其分别隶属于：车轮虫属、小车轮虫属及三分虫属，......

As a quasi-conservative tracer, measures of total alkalinity (TA) can be utilized to trace the relative fractions of fre......