眼斑拟石首鱼苗种生产技术   总被引：2，自引：0，他引：2  

王波  季如宝 《齐鲁渔业》1996,13(5):21-23

介绍了眼斑拟石首鱼的生长与繁殖特性，亲鱼选择和采卵方法，以及受精与孵化技术，并提出了仔鱼前期、仔鱼后期、稚鱼期、幼鱼期的鱼苗培育措施。  相似文献   

一种危害眼斑拟石首鱼的寄生涡虫及其防治   总被引：2，自引：2，他引：2  

汪彦愔 《水产学报》2002,26(4):379-381

眼斑拟石首鱼(Sciaenops ocellatus)俗称美国红鱼,又称红鼓鱼,是福建水产养殖业中重要养殖鱼类之一。它们生长速度快,对饲料的适应性强,饵料转化率高,一年即可养成1kg重的成品鱼,出口韩国,价格好。较之养殖大黄鱼具有成本低,经济效益好,资金周转快,成活率高等优点。福建省罗源湾的水质适于养殖美国红鱼,因此,近年大量投苗养殖,但  相似文献   

Effects of dietary lipid and environmental salinity on growth,body composition,and cold tolerance of juvenile red drum (Sciaenops ocellatus)   总被引：1，自引：0，他引：1  

Steven R. Craig  William H. Neill  Delbert M. Gatlin III 《Fish physiology and biochemistry》1995,14(1):49-61

Simultaneous, 6-week feeding trials were conducted in which diets containing menhaden, corn, coconut and hydrogenated menhaden oil at 7.0%, plus a diet containing 14% menhaden oil, were fed to triplicate groups of juvenile red drum (Sciaenops ocellatus) at two different salinities (5 and 32%.). Weight gain was significantly (p < 0.05) affected by diet and salinity. Fish fed the diet containing 14% menhaden oil had the greatest weight gain; whereas, fish fed the diet containing coconut oil gained the least weight. Fish in brackish water had significantly greater weight gain than fish in full-strength seawater over the 6-week period, although fish fed coconut and saturated menhaden oil in brackish water had reduced survival. Dietary lipid also significantly affected muscle and liver total lipid, hepatosomatic index (HSI), and intraperitoneal fat (IPF) ratio, as fish fed the diets containing 14% menhaden oil had higher values for all of these body condition indices.After the feeding trial, fish were subjected to a chronic cold tolerance assay. In the chronic trial, where temperature was gradually reduced over a 3-week period, fish fed the diets containing menhaden oil had significantly lower median lethal temperatures (MLT) than those fish fed the diets containing coconut, corn and saturated menhaden oils. No significant effects of cold exposure were observed on muscle and liver total lipid. Cold exposure prompted a modification in lipid metabolism by lowering total saturated fatty acids and raising (n – 3) highly unsaturated fatty acids (HUFA) in the neutral lipid of liver. Fish with the lowest MLT in the chronic assay exhibited signs of conserving (n – 3) HUFA and depleting (n – 6) fatty acids [primarily 18:2 (n – 6)], resulting in higher (n – 3)/(n – 6) ratios in the polar lipid of liver. These data suggest that the lower lethal temperature of juvenile red drum can be reduced through dietary manipulation involving the inclusion of high levels of dietary lipid rich in (n – 3) HUFA.  相似文献   

Effects of a mix of Bacillus sp. as a potential probiotic for Florida pompano,common snook and red drum larvae performances and digestive enzyme activities          下载免费PDF全文

M.R. Hauville  J.L. Zambonino‐Infante  J. Gordon Bell  H. Migaud  K.L. Main 《Aquaculture Nutrition》2016,22(1):51-60

This study examined the effect of a commercial mix of Bacillus sp. on survival, growth and digestive enzyme activities of Florida pompano, red drum and common snook. Larvae were fed either live feed enriched with Algamac 3050 (Control), Algamac 3050 and probiotics (PB), or the previous diet combined with a daily addition of probiotics to the tank water (PB+). Survival was not affected by the treatments for any of the species. At the end of the pompano and snook trial, standard lengths of larvae from the PB and PB+ treatments were significantly greater than for the control larvae. Microbiological analyses were performed at the end of the pompano trial, and numbers of presumptive Vibrio were not a concern in the system. For both pompano and snook, trypsin‐specific activity was higher in PB and PB+ larvae compared with the control larvae. Similarly, alkaline phosphatase activity was higher for the pompano larvae fed the PB and PB+ treatments and for the snook larvae fed the PB+ treatment compared with the control larvae. This experiment suggests that a mix of Bacillus sp. can promote growth through an early maturation of the digestive system during the early larval stages of pompano and snook.  相似文献   

头洞病地图鱼与正常地图鱼血液生理指标比较研究     

魏东  董少杰  孙向军  梁拥军  穆祥兆  张问夕  窦燕婕 《安徽农业科学》2010,38(9):4618-4620

对头洞病地图鱼和正常地图鱼的各项血液生理指标进行比较研究。结果表明,头洞病地图鱼与正常地图鱼的红细胞数量、红细胞体积和血红蛋白含量之间差异极显著,红细胞比积差异显著,而红细胞长径、红细胞短径、红细胞核长径、细红胞核短径、红细胞核体积、红细胞沉降速度、平均血红蛋白含量、平均血红蛋白浓度和白细胞数差异不显著。淋巴细胞、嗜中粒细胞、单核细胞和血栓细胞的大小差异不显著,而淋巴细胞、嗜中粒细胞、单核细胞的百分数含量差异极显著。  相似文献   

美国红鱼生产性繁育及其若干问题探讨     

楼宝柴学军  徐君卓吴祖杰 《上海海洋大学学报》2005,14(2):207-210

美国红鱼(Sciaemopsocellatus)亦称眼斑拟石首鱼,属鲈形目,石首鱼科,拟石首鱼属。原产于美国大西洋沿岸及墨西哥湾。1991年7月,国家海洋局第一海洋研究所从美国引进仔鱼40余尾,经培育于1995年9月繁殖试验成功。由于美国红鱼肉味鲜美,含脂量高,营养丰富,深受消费者青睐,近年  相似文献   

Evaluation of dietary creatine and guanidinoacetic acid supplementation in juvenile red drum Sciaenops ocellatus     

William Stites  Ling Wang  Delbert M. Gatlin 《Aquaculture Nutrition》2020,26(2):382-389

Two separate comparative feeding trials were conducted to evaluate if supplemental dietary guanidinoacetic acid (GDA), either singly or in combination with creatine, could enhance growth performance of red drum. The basal diet for both trials was formulated with practical ingredients but was not supplemented with creatine or GDA. For the experimental diets, creatine (0 or 20 g/kg) and GDA (0, 5 or 10 g/kg) were added to the basal diet in a 2 × 3 factorial arrangement for trial 1. Another 2 × 3 experimental design was adopted in trial 2 to further evaluate creatine (0 or 20 g/kg) and GDA (0, 10 or 20 g/kg) supplementation. Each diet was fed to juvenile red drum in either quadruplicate (trial 1) or triplicate (trial 2) aquaria twice daily for a total of 8 weeks. After each feeding trial, fish were sampled for body condition indices and whole‐body composition analysis, as well as determination of plasma, liver and muscle creatine concentrations. In trial 1, dietary creatine supplementation alone significantly (p < .05) improved weight gain and feed efficiency of red drum. An interaction between creatine and GDA was seen in whole‐body protein and lipid in the two trials. In trial 1, the highest levels of whole‐body protein and lipid were observed in fish fed 10 g GDA/kg, and in trial 2, supplementation of the diet with 10 g GDA/kg increased muscle protein and muscle lipid although there was a trending decline in fish fed the 20 g/kg GDA‐supplemented diet. In both trials of the present study, dietary GDA significantly (p < .05) enhanced liver creatine content. Dietary creatine also significantly (p < .05) enhanced plasma and muscle creatine content of red drum. Based on the results of this study, creatine was effective in enhancing weight gain and feed efficiency of red drum as seen in previous studies; however, GDA was not effective in influencing growth performance but limited synthesis of creatine from dietary GDA was apparent.  相似文献   

适应条件对鱼类续航游泳能力的影响   总被引：3，自引：0，他引：3  

桂福坤  王萍  吴常文 《水产学报》2010,34(8):1227-1235

以续航时间作为鱼类游泳能力的评测指标,就适应流速、适应时间、加速时间等适应条件以及测试流速4种因素对美国红鱼及黑鲷续航游泳时间的影响进行了研究。试验采用均匀设计,其中美国红鱼采用4因素8水平试验方案,黑鲷采用4因素7水平试验方案。试验研究和理论分析表明,加速时间对大流速条件下的续航时间有较大影响,而对小流速条件下的续航时间影响可以忽略,具体影响大小与鱼类的品种和规格、流速大小、加速时间等有关;适应流速建议控制在1.5 BL/s以内,以避免测试前鱼类过多的能量损失。尽管较长的适应时间更有利于鱼进行充分的调整以适应新的环境,但适应时间仍建议控制在60 min以内;测试流速对鱼类的续航时间有极为显著的影响,两种鱼的续航时间均随测试流速的增加呈幂函数规律衰减。  相似文献   

孔石莼和角叉菜对硝酸氮、磷的吸收及其生化组成变化   总被引：3，自引：0，他引：3  

秦传新  刘长发  张立勇 《水生态学杂志》2010,31(6):40-46

在 150L容器中添加氮、磷营养盐本实验研究了大型海藻孔石莼和角叉菜去除硝酸盐和磷酸盐营养盐的效果,以及营养盐硝酸盐浓度对大型藻类藻类生长及生化组成的影响。结果表明,高浓度硝酸盐浓度（30mg/L;N30）下海藻生长速度速率低于低浓度硝酸盐浓度（10mg/L;N10）。2种硝酸盐浓度下,孔石莼的生长速率均明显著大于高于角叉菜。高硝酸盐浓度N30下2种海藻对硝酸盐态氮的平均去除率均显著高于低硝酸盐浓度N10下（P<0.05）;低硝酸盐浓度N10下两种海藻对硝酸盐态氮的平均去除率无显著差异（P>0.05）,高硝酸盐浓度N30下角叉菜去除率显著高于孔石莼（P<0.05）。2种藻类对磷酸盐态磷的平均去除率无显著性差异（P>0.05）。一级反应动力学方程可以较好地描述孔石莼和角叉菜去除水中的硝酸盐和磷酸盐过程。,并可大致分为3个阶段。经10 d培养后添加氮、磷培养的2种海藻体内水分含量变化不大,粗蛋白和粗脂肪含量则有所增加。;并且高浓度硝酸盐N30培养海藻的粗蛋白和粗脂肪含量均略高于低浓度硝酸盐培养海藻。  相似文献   

Dietary vitamin C requirement of red drum Sciaenops ocellatus   总被引：5，自引：0，他引：5  

Aguirre  & Gatlin III 《Aquaculture Nutrition》1999,5(4):247-249

A feeding trial was conducted to determine the minimum dietary vitamin C requirement of juvenile red drum and characterize signs of vitamin C deficiency. Semipurified diets containing 400 g crude protein kg^–1 from lyophilized red drum muscle and crystalline amino acids were used in the feeding trial. The basal diet without supplemental vitamin C contained ≈ 6 mg vitamin C kg^–1 and was fed for a 1-week conditioning period. Red drum, initially averaging ≈ 3.6 g each, were fed diets supplemented with 0, 10, 20, 30, 45, 60, 75, or 150 mg vitamin C kg^–1 as ascorbate polyphosphate for a period of 10 weeks. Fish fed the basal diet began to exhibit overt signs of vitamin C deficiency, including reduced weight gain, lordosis, scoliosis and loss of equilibrium after 8 weeks. Total ascorbate was undetectable in liver of fish fed the basal diet while liver ascorbate levels in fish fed the other diets generally reflected dietary supplementation. Regression analysis of weight gain data using the broken-line model resulted in a minimum vitamin C requirement ( ± SE) of 15 ± 3 mg kg^–1 diet.  相似文献