真鲷早期幼体的摄食和营养

本文通国对真鲷幼鱼消化道（胃、肠）结构的观察，真鲷仔、稚、 幼鱼摄食节律及影响因素研究，环境因素对真鲷稚鱼摄食量影响的 分析，饵料中的营养物质在真鲷仔、稚、幼鱼体内的吸收利用和转运 分布研究，以及真鲷必需氨基酸的测定，得出结果如下： 1、真鲷幼鱼胃、肠的形态、结构和机能接近成鱼。胃肠分为 粘膜层、粘膜下层、肌肉层、浆膜层四层。肠长略大于体长．胃已分 化成贲门部、幽门部、幽门垂三部分，胃型为U型。超微结构显示幼 鱼胃、肠壁细胞具备数量丰富的线粒体内质网，胃粘膜层上皮细胞 结构清晰完整。 8、真鲷仔、稚、幼鱼的摄食具明显节律性，属白天偏晨昏摄食 类型。白昼摄食强度明显大于夜间，...学位：理学硕士院系专业：海洋与环境学院环境科学研究中心_海洋生物学学号：YL00011

STUDIES ON THE FEEDING AND NUTRITION ofPACROSOMUS MAJOR LARVAE

真鲷幼体摄食与营养研究结果表明：真鲷幼体的日摄食具有明显的昼夜节律性。白天的摄食强度大于夜间，早晨及傍晚分别出现日摄食的两个高峰。葡萄糖为真鲷幼体生长的重要能源物质之一，主要贮存于幼体的肌肉和肝脏中。氨基酸是幼体生长的重要物质，真鲷幼体体内必需氨基酸的可能种类有11种。Feeding and nutrition of P.major larvae were studied by diet rducing method and carbon-14 isotopic tagging technique.The resulte shoued thatFeeding rhythemicity of P.major larvae was obviously.The Feeding intensity wasstronger in daytime(above 80%)than at night.Two strongest Feeding periodswere in the morning and at nightFall.Glucose provided energy For the growth ofP.aam larvae and wag stored in liver and muscles.Amino acid was one of theimportant substanced For the growth of P.major larvae and there were elevenkinds of essential amino acid For P.major larvae

The Toxicities of Cu,Zn,Cd on Larval Red Sea Bream and Larval Black Sea Bream

研究了Cu、zn、Cd三种重金属对真鲷幼鱼和黑鲷幼鱼的毒性作用。结果表明Cu、zn、Cd对真鲷、黑鲷幼鱼的毒性须序均为Cu＞zn＞Cd；Cu、zn、Cd对两种幼鱼的96H半致死浓度及安全浓度：真鲷幼鱼为Cu0.31Mg/l、0.031Mg/l，zn3.6Mg/l、0.36Mg/l，Cd0.53Mg/l、0.053Mg/l；黑鲷幼鱼为Cu0.20Mg/l、0.02Mg/l，zn1.8Mg/l、0.18Mg/l，Cd0.3Mg/l、0.03Mg/l.A study of the toxication of Cu , Zn , Cd on larval red sea bream and larval blacksea bream was conducted.The results indicated that the toxicity sequence was Cu>Cd>Zn.The 96 hMedian Lethal Concentrations and SaFe Concentrations of the two Fishes : For larval red sea bream wereCu 0.31 mg/L, 0.031 mg/L,Zn 3.6 mg/L,0.36 mg/L, Cd 0.53 mg/L,0.053 mg/L; For larvalblack sea bream were Cu 0.20 mg/L, 0.02 mg/L, Zn 1 .8 mg/L, 0.18 mg/L, Cd 0.3 mg/L , 0.03mg/L