集装箱和溪流养殖马口鱼的营养品质评估

马口鱼是我省山区的溪流性鱼类,为了解集装箱养殖马口鱼的营养价值,采用生化测定方法,对比研究集装箱和溪流不同养殖模式下马口鱼营养品质,并开展了相应的营养评价。结果表明,集装箱养殖马口鱼生长情况较好,肥满度和空壳率都比溪流养殖的马口鱼高。集装箱马口鱼高蛋白,不饱和脂肪酸质量高,而溪流养殖马口鱼则具有低脂、氨基酸组成比较平衡、口感优的特点。溪流养殖马口鱼的感官品质总体评价比集装箱养殖马口鱼高。马口鱼在溪流和集装箱两种养殖模式下,其营养品质发生了改变,各有各的价值和参考意义。

欧鳗山区溪流养殖试验——幼鳗、成鳗的养殖

本文总结了1995—1996年来龙岩山区欧鳗的养殖结果,平均体重每尾2.4克幼鳗经三个月的养殖,成活率达80％,饲料系数0.75以上。成鳗养殖成活率可达95％以上,饲料系数平均0.54。结果表明:控制欧鳗养殖水日交换量大于100—150％,建立蓄水池,进行水处理,解决雨季鳗场用水,采用优质配合饲料,定期进行病虫害防治,特别是拟指环虫病的防治,是山区欧鳗养殖成功的关键。

南方地区溪流水养殖虹鳟技术

虹鳟(Salmo Irideus Gibbons)原产美国加利福尼亚州，为底层冷水性鱼类，其肉质细嫩，味鲜美，无腥味，无小骨刺，营养丰富。为进一步优化、调整本地水产养殖品种结构，提高经济效益，近年来，我们利用本县溪流水进行虹鳟养殖，实施“

Preliminary Study on Nitrogen and Phosphorus Releases from Creek Sediments in Shanghai Suburbs

A laboratory study was conducted to observe the release ofnitrogen and phosphorus from the sediments under both anaerobic andaerobic conditions. The samples used were five creek sediments and afish-pond sediment (as a comparison) obtained from suburban Shanghai.High loads of nitrogen and phosphorus were found in the creeksediments. Total nitrogen of the sediments ranged form 1.17 to 5.95 gkg^-1; total phosphorus from 608.63 to 2 033.95 mg kg^-1. Making upmore than 90/100 of the total nitrogen, organic nitrogen was thedominant nitrogen fraction in the sediments; whereas inorganicphosphorus was the dominant phosphorus fraction, which made up morethan 85 percent of the total phosphorus. Ca-bound phosphorus fractiondominated inorganic phosphorus, which occupied more than 50/100 ofthe total.