煤矿塌陷地网箱生态养鳙试验报告     

陈德福马福涛  杨海峰时志勇 《齐鲁渔业》2006,23(3):27-28

在未治理塌陷地水域,设置生态养鳙网箱52箱。使用生态养殖技术(不投饵),利用微生物制剂及人工诱导饵料生物技术,在25m~2网箱内放养鱼种300尾,其中鳙规格为165g／尾。经过137天的养殖,网箱平均单产19．72kg／m~2,其中鳙单产14．97kg／m~2,折合每667m~2产鳙9985kg。网箱平均产值达138．06元／m~2,净收入为99．66元／m~2,投入产出比为 1∶3．59。  相似文献   

不同剂量甘果寡糖对鲤生长和运输的影响   总被引：7，自引：1，他引：7  

周小秋  邝声耀  唐凌 《水产科学》2002,21(2):13-14

选用初始体重为 180～ 190g的正常健康鲤 10 8尾 ,分成 3组 ,每组 36尾 ,每组设 3个重复。实验用 3种处理 ,即对照组 (基础饵料 )、基础饵料 +30 0× 10 -6甘果寡糖、基础饵料 +6 0 0× 10 -6甘果寡糖 ,在实验 6 0d后每个处理组用 12尾鱼作运输试验 ,运输距离 5 0 0km ,运输时间近 14h。研究结果表明 :在基础饵料中 ,添加寡糖显著地提高生长速度和饵料利用率 (P <0 0 1) ,同时对鲤鱼的耐长途运输能力没有影响  相似文献   

Effects of paraquat treatment on fish transaminase molecular subforms     

K. Aranka Deér  János Nemcsók  LászIó Boross  Béla Szajáni 《Fish physiology and biochemistry》1990,8(1):79-83

The effects of paraquat (PQ; 1,1′-dimethyl-4,4′-bipyridylium dichloride) treatment were investigated in carp, silver carp and wels. The serum glutamic-oxalacetic transaminase (GOT; L-aspartate: 2-oxoglutarate aminotransferase, EC 2.6.1.1.) level was enhanced by 50% at 1 ppm exposure and by 100% at 10 ppm exposure in all species, and there was a change in the distribution of the molecular subforms of GOT in the liver and heart. The activities of the individual subforms decreased with increasing PQ concentration or after a longer exposure. In some cases, one of the subforms was no longer present in the liver. An increased serum GOT activity, a decreased enzyme activity in different organs and the disappearance of molecular subform indicate tissue damage.  相似文献   

草鱼LDH同工酶比较酶学和免疫化学性质   总被引：5，自引：0，他引：5  

薛国雄  官平  张燕生  杨靖  赵淑慧  吴婷婷  夏德全 《水产学报》1992,16(4):357-364

本文以草鱼为材料,利用亲和层析法,从肌肉、心脏和肝脏中分离纯化了 LDH同工酶基因产物;LDH-A_4、B_4和C_4,并对其纯度,氨基酸组成以及动力学性质进行了比较分析,同时制取了A_4、B_4和C_4的相应抗体,利用抗原-抗体免疫吸附反应对一些淡水鱼类的LDH 酶谱进行了准确的鉴定。  相似文献   

cDNA cloning and characterization of the warm-temperature-acclimation-associated protein Wap65 from carp, Cyprinus carpio     

S. Kinoshita  S. Itoi  S. Watabe 《Fish physiology and biochemistry》2001,24(2):125-134

We determined full-length cDNA of carp warm-temperature-acclimation-associated 65-kDa protein (Wap65). It encoded 439 amino acid residues with a signal peptide of 22 residues and showed an amino acid sequence identity of 88% to that of goldfish reported before (J. Biol. Chem. 1995. 270: 17087–17092). The number of potential N-linked glycosylation sites of carp Wap65 was two in contrast to three for goldfish. In addition, molecular mass determined by SDS-PAGE was apparently different from that of goldfish. These results suggest that the amount of oligosaccharide is different between the carp and goldfish protein. As in goldfish, carp Wap65 mRNA showed marked accumulation in hepatopancreas of the 30 °C- acclimated fish, which was 8-fold higher than that of the 10 °C-acclimated fish. Carp Wap65 showed 30% amino acid identity to mammalian hemopexins, which appeared to be considerably low in comparison with those among mammalian hemopexins (72 to 80%), or among carp Wap65 and rainbow trout hemopexin-like protein (70%). However, although mammalian hemopexins contain residues comprising the heme binding pocket, carp Wap65 lacked one of the two histidine residues to serve as heme axial ligands in hemopexins. Our data on carp protein substantiates the previous observation for goldfish and indicates that Wap65 might have some important functions in warm-temperature-acclimation of fish.  相似文献   

Acute Toxicity of Synthetic Pyrethroid Cypermethrin on the Common Carp (<Emphasis Type="Italic">Cyprinus carpio</Emphasis> L.) Embryos and Larvae     

Rahmi?Ayd?nEmail author  Kenan?K?prücü  Mustafa?D?rücü  Sibel??im?ek?K?prücü  Murat?Pala 《Aquaculture International》2005,13(5):451-458

In this study, the toxic effects on the embryos and larvae of the common carp were used as a model to investigate the synthetic pyrethroid pesticide, cypermethrin, which contaminates aquatic ecosystems. Data obtained from the cypermethrin acute toxicity tests were evaluated using the Probit Analysis Statistical Method. The control and eight test experiments were repeated five times. The number of dead embryos significantly increased in response to cypermethrin concentrations 0.0001, 0.001, 0.01, 0.1, 1, 2, 4 and 8 μg l⁻¹ (p<0.05 for each case). The 48 h LC₅₀ value (with 95% confidence limits) of cypermethrin for common carp embryos was estimated at 0.909 (0.256–5.074) μg l⁻¹. Dose–response decreases in hatching success were recorded as 87.4, 85.0, 80.2, 71.4, 56.3, 48.6, 38.8 and 23.5%, respectively. The lowest concentration of cypermethrin (0.0001 μg l⁻¹) produced a significant increase in the number of dead larvae compared to the control group (p<0.05). The number of dead larvae significantly increased with increasing cypermethrin concentrations exposed for 1–96 h (p<0.05). The highest concentration (8 μg l⁻¹) showed the highest larvae mortality. The 96 h LC₅₀ value (with 95% confidence limits) of cypermethrin for common carp larvae was estimated at 0.809 (0.530–1.308) μg l⁻¹. The results of the study suggest that low levels of cypermethrin in the aquatic environment may have a significant effect on the reproduction and development of carp.  相似文献   

Immunostimulant effects of nucleotide isolated from yeast RNA on carp, Cyprinus carpio L.   总被引：2，自引：0，他引：2  

M Sakai  K Taniguchi  K Mamoto  H Ogawa  & M Tabata 《Journal of fish diseases》2001,24(8):433-438

Nucleotides from yeast RNA were evaluated for their ability to enhance the non-specific immune responses in carp, Cyprinus carpio . Oral administration of nucleotides to fish daily for 3 days resulted in enhanced responses of phagocytic and nitroblue tetrazolium (NBT) activities in kidney phagocytic cells. This activation of kidney cells was observed for at least 10 days post-treatment. The serum complement and lysozyme activities also increased in fish treated with nucleotides. Furthermore, the number of Aeromonas hydrophila in nucleotide-treated fish significantly decreased in the blood, kidney and liver after intraperitoneal injection. Thus yeast nucleotides appear to enhance non-specific immune responses in fish.  相似文献   

The effect of feeding three anabolic steroids in different combinations on the growth,food conversion efficiency and protein and nucleic acid levels of liver,kidney, brain and muscle of mirror carp (Cyprinus carpio)     

Khalid P. Lone 《Fish physiology and biochemistry》1989,6(3):149-156

A study on the effect of three different anabolic-androgenic steroids on the growth, food conversion efficiency and nucleic acid contents of liver, kidney, brain and muscle of carp,Cyprinus carpio was undertaken. The three steroids, methyltestosterone (MT), ethylestrenol (EE) and oxandrolone (ON), were fed in different combinations at final concentrations of 5 or 6 mg/kg diet for 60 days. No effect on the growth was observed in any of the experimental groups. A decrease in the specific growth rate (11–21%) and food conversion efficiency (20–29%) was noted. Feeding of drugs increased the cranio-somatic and reno-somatic index in all except one group. Hepatosomatic (ON+MT) and viscero-somatic (ON+MT; EE+MT+ON) indices decreased. Protein increased and RNA/DNA decreased in only one group while a decrease in protein/DNA was observed in the liver of all experimental groups. RNA/DNA increased and protein/RNA decreased only in one group while no effect was seen in protein and protein/DNA contents in any of the treated kidneys. Proteins, protein/RNA and protein/DNA decreased in certain groups in brain tissue. In muscle, no effect was seen in proteins or protein/DNA. Protein/RNA decreased in all but one group while RNA/DNA was higher only in the group fed all the three steroids together.  相似文献   

鲤鱼脱脂方法的研究   总被引：1，自引：0，他引：1  

王雅卿  郭恒斌  曾庆祝 《水产科学》2006,25(6):297-300

分别采用水漂洗、有机溶剂浸提、脂肪酶酶解的方法对鲤鱼鱼肉进行脱脂。试验结果表明,水漂洗法中,清水漂洗效果最优;有机溶剂浸提法中,异丙醇脱脂效果最佳,并对其采用正交试验方案对异丙醇脱脂工艺进行优化,得到最佳试验条件是:脱水时间30 m in,脱脂时间110 m in,温度为75℃,溶剂添加量为50 g;脂肪酶脱脂试验得出最佳条件是加酶量40 U/m l,酶作用时间50 m in。3种方法中,脂肪酶脱脂效果最佳。  相似文献   

饲料Vc对异育银鲫的生理效应及其适宜添加量     

宋学宏  蔡春芳  赵林川  潘新法  吴康  张建 《中国水产科学》2002,9(4):359-362

在精制饲料中分别添加不同剂量Vc(0、37.5、75、15 0、30 0、6 0 0和 12 0 0mg/kg) ,连续投喂异育银鲫 (方正银鲫♀×兴国红鲤♂ ) (Carassiusauratusgitelio) 8周。结果显示 ,当饲料中缺乏Vc时异育银鲫虽没有出现明显的缺乏症状 ,但日增重率、血红蛋白含量和血清POD酶活性均低于Vc添加组 ,而红细胞脆性极显著地高于高剂量Vc添加组 (P <0 .0 1) ;同时 ,经新复极差检验 ,在适宜范围内随着饲料Vc含量增加 ,异育银鲫日增重率、血红蛋白含量、POD活性等指标显著提高 ,而红细胞脆性明显下降 (P <0 .0 5 )。综合以上指标的非线性回归分析结果 ,建议生产上异育银鲫饲料Vc适宜添加量为 30 0～ 5 0 0mg/kg。  相似文献