人工养殖环境下中华鲟野生幼鲟的生长特征

暂养2006年5月渔民在崇明东滩误捕受伤的中华鲟野生幼鲟,分析研究了其6—8月的生长特点。结果显示,抢救存活的中华鲟幼鲟在人工环境下,体长和体重分别从(15.40±0.64)cm和(26.00±1.34)g增加到(29.20±0.75)cm和(108.00±3.87)g,日均增长1.54 mm,日平均增重0.90 g。拟合中华鲟幼鲟体长与体重的关系为:W=0.121 5 L2.031 3(R2=0.945 7),其中b小于3,为异速生长,说明其体长增长快于体重增长。与同期野生环境下的中华鲟幼鲟比较,幂指数系数b人工=2.0313<b野生=2.3474,肥满度C人工=0.59<C野生=0.72,说明幼鲟在野生环境下的长势较在人工环境下要好。这一现象可能是野生幼鲟误捕受伤,以及在人工环境下环境不适和饵料不适口所导致的。通过中华鲟野生幼鲟的生物学研究,养殖环境和抢救技术的改进,中华鲟野生幼鲟在人工养殖环境下救护是可行的。

A Multi-Agent Expert System for Prevention of Child Abuse and Neglect

When a child abuse situation arises, the responsible agencies and entities in charge of response should be capable of providing a fast and personalized solution for the good of the child. This need leads the authors to consider the formation of dynamic virtual organizations tailored to each particular abuse case. In the authors＇ approach the partner selection of these collaborative networks is done through a software tool that combines two technologies from the field of artificial intelligence, specifically multi-agent systems and expert systems. In addition, these partners come from the breeding environment constituted by all the agencies or individuals, either in a region or locality, which have the potential of response.