Abstract:通过外源甲状腺素（T4）及可的松浸泡卵和仔鱼，结果表明：外源甲状腺素（T4）和可的松对牙好卵的孵化率和初孵仔鱼的体长没有显著影响；外源甲状腺素（T4）对0～10日龄的仔鱼生长有显著影响，和对照组（0）相比，0．05×10-6和0．1×10－6的影响显著，外源可的松对0～10日龄的生长不显著；外源甲状腺素（T4）和可的松对11～24日龄仔鱼的生长不显著，外源甲状腺素（T4）对11～24日龄的仔鱼变态有显著影响，和对照组（0）相比，0．05×10－6和0．1×10-6的影响显著；外源可的松对11～24日龄的变态影响不显著。

Abstract:The effect of number of washing operation, pH and kind of washing solution,and washing technique on freezing denaturation of protein in silver carp surimi was studied in this paper. Taking the factors of economy, efficiency and quantity of products into consideration, it was suggested to wash surimi 3 to 5 times by using 0. 1% citric acid solution first and then by CaC12 0. 15% solution. Thus, the extent of freezing denaturation of protein in surimi could be effectively decreased when a certain amount of cryoprotectants such as sucrose and dorbital was added into surimi after washing.

Abstract:The genetic assessment of 64 wild and cultivated mud carp, Cirrhina molitorella, 10 India mrigal, C. mrigola and 10 India rohu, Label rohita is inferred from its RAPD analysis. 107, 73, 87 DNA fragments in mud carp, India mrigal and India rohu are amplified respectively by 26 10bp-primers. The polymorphic loci percentage is 35. 5%,39. 7%, 37. 9% respectively. The genetic distance of mud carp-India rohu, mud carp-India mrigal and India mrigal-India rohu is 0. 22, 0. 58, 0. 64 respectively. The relationship of mud carp-India rohu is more close than mud carp-India mrigal and India mrigal-India rohu by the dendrogram of the three species based on UPGMA and NJ. This is similar to allozyme analysis, but there is differential from traditional taxonomy.

Abstract:This paper analyzes the type selection of the monitoring equipment used in breeding greenhouse, the design project of the circuit connecting the equipment with computer and supplemental control design for computer water temperature control system.The selected type and design results are also showed. It provides with some good theoretical and practical basis for developing the greenhouse computer monitoring system which suits our own national condititions and can be popularized in fishery circles.

Abstract:Motion of internal wave in three-layer stratified fluid is analyzed by small amplitude wave theory in this paper. Patterns of vertical distribution in velocity due to the wave and its dispersion relationship are discovered, and they fully agree with some characteristics of the internal wave obsered at the field of Osaka Bay. Also, the analyzed results show that velocity of flow is related to rate of discharge in each layer due to the wave, and depth of maximum amplitude depends on state of stratification. Morever, it is found that there are two dilferent modes of velocity in three-layer stratified fluid, interfacial phase and direction of the wave with smaller mode are contrary to case of two-layer stratified fluid. These characteristics of the internal wave in three-layer stratified fluid will be helpful to estimate water environments and to select sultable underwater depth for facilities of aquaculture.

Abstract:The changes of progesterone contents of ovary and mandibular organ in crayfish, Procambarus clarkii during the vitellogenesls were studled by using of radioimmunoassay. The progesterone contents increased at early second vitellogenesis stage and decreased significantly at the mid second vitellogenesis stage; the progesterone content of post spawning stage was undetective. These results indicated that the ovarian progesterone contents decreased during the mid second vitellogenesis, maturation and spawning. These findings suggest that progesterone content increase is related to the onset of the vitellogenesis. The progesterone content in mandiburlar organs at different developing stage was all undetective.

Abstract:应用组织切片技术于光镜下研究了中华绒螯蟹眼柄神经内分泌系统的组织形态结构，眼柄神经内分泌系统的主要组成部分为Ｘ器官－窦腺复合体Ｘ器官位于视端髓的外缘，其内具有Ｉ型和Ⅱ型两种类型神经分泌细胞，窦腺位于视内髓与视端髓交界处的背部，与Ｘ器官处于不同侧，由窦腺壁与中央血窦腔组成，窦腺壁由神经分泌细胞的末梢及神经质细胞交织而成。此外，在窦腺周围还存在的Ⅲ型和Ⅳ型神经分泌细胞及一群未知细胞团。