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1.
配制等氮(蛋白质含量41％)和等能量的(11．2MJ/kg饲料)的半精制中华鲟饲料，以等量混合的海水鱼油、豆油作为添加的脂肪源，设0、2％、4％、6％、8％和10％共6种添加浓度。试验周期为25d。结果显示：增重率、饲料系数和蛋白效率以及以脂肪含量7．6％～9．6％的饲料为最佳，考虑到饲料成本，建议把中华鲟饲料脂肪的最适量设定在8％左右。 相似文献
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选配3组虹鳟鱼种饲料配方。通过网箱养殖进行了对比试验，结果表明：1^#配方饲料与2^#、3^#配方饲料有显著差异。2^#、3^#配方饲料差异不显著；1^#配方饲料含粗蛋白37．0％、粗脂肪22．3％、可消化能1．76MJ／kg，饲养鱼种平均成活率为96．85％。鱼种平均尾重167．2g，总增重931．2kg、增重12．67倍，饲料系数为1．29。建议生产上使用1^#配方饲料。 相似文献
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摘要：分析了中华鲟幼鱼4种饵料（3种饵料生物：斑尾刺虾虎鱼、安氏白虾、河蚬和1种人工饲料）及2组中华鲟幼鱼（野生和人工养殖）肌肉的一般营养成分、氨基酸和脂肪酸组成。通过计算4种饵料分别相对2组中华鲟幼鱼肌肉的必需氨基酸比率比值(A/E)和必需氨基酸指数(EAAI),评价4种饵料的蛋白质营养价值;通过分析4种饵料和2组中华鲟幼鱼的脂肪酸组成和含量,评价4种饵料的脂肪酸营养价值。结果表明：斑尾刺虾虎鱼、安氏白虾、河蚬、人工饲料、野生和人工养殖中华鲟幼鱼肌肉的粗蛋白含量分别为85.43%、67.84%、51.88%、54.20%、91.83%、83.40%。以野生中华鲟幼鱼肌肉蛋白为参比,斑尾刺虾虎鱼、安氏白虾、河蚬、人工饲料的EAAI分别为0.922、0.913、0.918、0.956;以人工养殖中华鲟幼鱼肌肉蛋白为参比,EAAI分别为0.933、0.913、0.915、0.953,说明4种饵料相对2组中华鲟幼鱼而言均是优质蛋白源,基本能满足中华鲟幼鱼的蛋白需求;但从A/E值来看,4种饵料中均有个别限制性氨基酸（赖氨酸和亮氨酸）不能完全满足中华鲟幼鱼的营养需求。通过比较4种饵料的脂肪酸组成和含量发现,中华鲟幼鱼3种饵料生物中含n3PUFA较多,能为中华鲟幼鱼的入海洄游提供丰富的n3PUFA营养,而人工饲料中含n3PUFA较少,不能满足用于放流的人工养殖中华鲟幼鱼对n3PUFA的营养需求。综合来看,不同饵料的营养成分不同,天然饵料生物的粗蛋白、氨基酸和重要脂肪酸的含量均较多,故在研制和开发中华鲟幼鱼的人工饲料时,应根据其天然饵料生物的营养组成情况,适当的添加Lys、Leu和n3PUFA来满足中华鲟幼鱼生长、存活和洄游的营养需求。 相似文献
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中华鲟幼鱼饵料生物及人工饲料的蛋白质和脂肪酸营养价值评价 总被引：1，自引：0，他引：1
分析了中华鲟幼鱼4种饵料(3种饵料生物:斑尾刺虾虎鱼、安氏白虾、河蚬和1种人工饲料)及2组中华鲟幼鱼(野生和人工养殖)肌肉的一般营养成分、氨基酸和脂肪酸组成.通过计算4种饵料分别相对2组中华鲟幼鱼肌肉的必需氨基酸比率比值(a/A)和必需氨基酸指数(EAAI),评价4种饵料的蛋白质营养价值;通过分析4种饵料和2组中华鲟幼鱼的脂肪酸组成和含量,评价4种饵料的脂肪酸营养价值.结果表明:斑尾刺虾虎鱼、安氏白虾、河蚬、人工饲料、野生和人工养殖中华鲟幼鱼肌肉的粗蛋白含量分别为80.57%、67.84%、51.88%、54.20%、91.83%、83.40%.以野生中华鲟幼鱼蛋白为参比,斑尾刺虾虎鱼、安氏白虾、河蚬、人工饲料的EAAl分别为0.938、0.913、0.918、0.956;以人工养殖中华鲟幼鱼肌肉蛋白为参比,EAAI分别为0.940、0.913、0.915、0.953,说明4种饵料相对2组中华鲟幼鱼而言均是优质蛋白源,基本能满足中华鲟幼鱼的蛋白需求.通过比较4种饵料的脂肪酸组成和含量发现,中华鲟幼鱼3种饵料生物中含n-3 puFA较多,能为中华鲟幼鱼的入海洄游提供丰富的n-3puFA营养,而人工饲料中含n-3 puFA较少,不能满足用于放流的人工养殖中华鲟幼鱼对n-3 puFA的营养需求.综合来看,不同饵料的营养成分不同,天然饵料生物的粗蛋白、氨基酸和重要脂肪酸的含量较多,故在研制和开发中华鲟幼鱼的饵料时,应根据其天然饵料生物的营养组成情况,适当地添加其所需的氨基酸和脂肪酸来满足其生长、存活和洄游的营养需求. 相似文献
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中华鲟(Acipenser sinensis Gray)是国家一级水生保护动物,因其具有很高的营养价值和学术研究价值,近年来其人工养殖在全国范围内迅速展开。相应的中华鲟人工配合饲料研制也成为了中华鲟人工养殖的重要组成部分。脂肪是动物营养的重要成分之一,不仅提供动物生长和维持生命活动所需的能量,而且脂肪中的必需脂 相似文献
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不同饲料对稚鳖生长的影响 总被引：2，自引：0，他引：2
本试验分人工配合饲料、鲜鱼肉以及人工配合饲料和鲜鱼混合三个饲料试验组，对当年稚鳖在２９±１℃水温条件下进行生长养殖试验。结果表明：养殖６０天，以投喂鲜鱼肉组稚鳖生长最快，增重倍数达１４．２２；人工配合饲料加鲜鱼肉饲料组饲料系数最低为２．３５，养殖一公斤鳖的饲料成本仅为８．４７元；取得了稚鳖日增重０．３—０．７９克／只的养殖效果。 相似文献
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中华鲟小水体养殖试验 总被引：1，自引：0，他引：1
利用水泥池小水体进行中华鲟养殖试验,采用人工配制饲料,通过４个阶段１７３天的养殖,鱼尾均共增重１８１７ｇ,日均增重分别为８．５ｇ、９．２ｇ、１２．９ｇ,饲料系数为１．９６、２．１２、２．３３、２．２１。水温处于８℃～２９．１℃均可摄食生长。 相似文献
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试验在雪野水库进行，重点探讨了网箱养殖淡水白鲳的网箱材料、放养密度和饲料配方等问题。抽测结果：净产淡水白鲳68．40kr／m2，平均尾重l304．7g，增重倍数7．0，颗粒饲料系数1．8，l10只网箱纯收入22．74万元。试验表明，白色硬塑料网箱应是首选的网箱材料，适宜放养密度为80尾／m2(12kg/m2)。 相似文献
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地图鱼人工配合饲料网箱养殖试验 总被引：3，自引：0，他引：3
地图鱼是原产于南美洲亚马逊河流域的观赏和食用兼备的较大型热带鱼，经济价值极高。１９９３年７－１０月在水库网箱中利用体重２７ｇ鱼种进行人工配合饲料养殖试验。通过８５天饲养，地图鱼体重达到１４３．４ｇ，净增重１１６．４ｇ，增重率４３１％，生长比速１．９６，日增重１．３７ｆｇ／尾，饵料系数２．３。水库网箱养殖地图鱼的生长速率为内流水池饲养的２．５倍，地图鱼的体色也更为绚丽多彩，且养殖成本在幅度降低，可望 相似文献
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Shun Watanabe Jun Aoyama Seishi Hagihara Bunpei Ai Rhodora V. Azanza Katsumi Tsukamoto 《Fisheries Science》2013,79(3):375-383
Anguilla luzonensis and A. huangi were each described in 2009 using eels obtained from northern Luzon Island. We examined the taxonomic status of these two groups of eels using morphological and molecular genetic characters. There were no significant differences in two vertebrae counts between eels of A. luzonensis and A. huangi. Mitochondrial 16S ribosomal RNA and cytochrome b genes sequences were obtained and compared among 28 specimens of A. luzonensis, the holotypes of A. luzonensis and A. huangi, and one specimen of the other 15 anguillid species. The specimens of A. luzonensis exhibited almost identical sequences, including the holotype, with only a few site differences, and the genetic difference between the holotypes of A. luzonensis and A. huangi was within the range of differences of specimens of A. luzonensis. The other anguillid species were genetically very different from A. luzonensis and A. huangi, although A. interioris is a closely related species. It is clear that A. luzonensis and A. huangi are the same species, and according to the principle of priority in zoological nomenclature, A. luzonensis Watanabe, Aoyama, and Tsukamoto, 2009 is the valid species name, and A. huangi Teng, Lin, and Tzeng, 2009 is a junior synonym of A. luzonensis. 相似文献
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《Journal Of Aquatic Food Product Technology》2013,22(4):61-70
No abstract available for this article. 相似文献
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Mulloway (Argyrosomus japonicus) occur in estuarine and coastal waters surrounding Australia, Africa, India, Pakistan, China, Korea and Japan, where they are important in fisheries. This study identified that mulloway in south-eastern Australia had similar growth rates, but matured at smaller lengths and younger ages, to those in South Africa and Western Australia. Growth of both sexes was similar to about 5 years, after which females grew faster and attained a greater maximum length than males. Female mulloway matured at 4–5 years of age with a L50 of 68 cm, whereas males matured at 2–3 years of age with a L50 of 51 cm. The commercial fishery in New South Wales was characterised by declining catches and a reduction in the proportion of mulloway of mature lengths in landings. During 2002–2005 commercial landings were dominated (83%) by fish within 15 cm of the current minimum legal total length of 45 cm and aged 2 and 3 years (>80%), even though mulloway can attain lengths of 200 cm and live >30 years. Estimates of the rates of instantaneous total mortality ranged between 0.34 and 0.45, whilst the rate of instantaneous natural mortality (M) was estimated to be approximately 0.12. Yield-per-recruit analyses indicated that mulloway in New South Wales are being growth overfished and substantial increases in yield could be achieved by increasing the length at first harvest. Values of the spawning potential ratio were below 0.2 under a range of mortality estimates, suggesting that mulloway are at risk of recruitment overfishing. These results suggest that the spawning stock of mulloway in south-eastern Australia has been depleted and that remedial management action is required to protect this iconic species. 相似文献
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Charles C. Mischke Matt J. Griffin Terrence E. Greenway David Wise 《Journal of the World Aquaculture Society》2013,44(2):288-292
Mosquitofish, Gambusia sp., have been spread throughout the world to biologically control mosquitoes. However, the fish has gained a reputation as an invasive species and has been implicated in displacing native aquatic species. Gambusia affinis are native to the southeastern United States and commonly occur in commercial channel catfish, Ictalurus punctatus, production ponds. We investigated effects of mosquitofish presence on zooplankton populations, water quality, disease occurrence, and fish production in experimental ponds. There were no differences between ponds with or without mosquitofish in numbers of calanoid copepods, cyclopoid copepods, total copepods, Bosmina sp., Ceriodaphnia sp., Moina sp., Daphnia sp., or total cladocerans. There were also no differences in copepod and cladoceran sizes. Copepod nauplii were more numerous during the summer months in ponds with mosquitofish. There were no differences in water quality variables (soluble reactive phosphorus, nitrate, nitrite, ammonia, total nitrogen, total phosphorus, pH) or phytoplankton density between ponds stocked with and without mosquitofish. Catfish production and disease occurrence were also similar between ponds with and without mosquitofish. Although mosquitofish may cause problems when stocked outside their native range, there does not appear to be any adverse effects of mosquitofish presence in catfish production ponds. 相似文献
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The effects of exposing the eggs of Pacific threadfin and amberjack eggs (AEs) to different concentrations of hydrogen peroxide for 5 min on hatch rate and survival were assessed in a series of experiments using a petri dish model rearing system. Despite significant inter‐batch variation in hatch rate, it was shown that eggs of both species could be safely exposed to up to 11 340 mg L−1 H2O2 for 5 min. Exposure to 34 230 mg L−1 H2O2 for 5 min was shown to be lethal to AEs at a late stage of development. In two further experiments, it was demonstrated that Pacific threadfin eggs were resistant to all tested concentrations of a range of polyvinylpyrrolidone iodine (PVP‐I) concentrations and contact times (up to 1000 mg L−1 PVP‐I for 10 min). The level of bacteria adhering to the eggs of both species was highly variable. Where eggs were heavily colonized (>104 cfu egg−1), hydrogen peroxide concentrations of at least 11 340 mg L−1, or PVP‐I concentrations higher than 500 mg L−1 for 10 min, were required for effective sterilization. In less colonized batches, rinsing in sterile seawater or exposure to lower (550 mg L−1) concentrations of H2O2 was sufficient to result in high apparent levels of surface sterility (<1 cfu egg−1). 相似文献
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Fisheries Science - Fermentation of kamaboko in koji with wheat (KW), rice (KR), brown rice (KB), or soybean (KS) was performed by simulation of tofuyo processing. Moisture and protein content... 相似文献
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Sperm Motilities in Waigieu Seaperch,Psammoperca waigiensis: Effects of Various Dilutions,pH, Temperature,Osmolality, and Cations 
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下载免费PDF全文 The objectives of this study were to evaluate the effects of varying dilutions, pH, temperature, osmolality, and cations on sperm motility parameters in waigieu seaperch, Psammoperca waigiensis. The maximum velocity of average in path (VAP), percentage of motile cells (MOT), and duration of sperm motility (DSM) were observed when semen was diluted in artificial seawater (ASW) at a ratio of 1:100 (144.9 ± 0.6 µm/sec, 95.6 ± 0.4%, and 230.3 ± 2.3 sec, respectively), at 30 C (142.0 ± 0.6 µm/sec, 93.6 ± 0.4%, and 238.3 ± 0.9 sec, respectively), and pH 8 (144.8 ± 0.6 µm/sec, 93.3 ± 0.4%, and 234.0 ± 1.5 sec, respectively). Maximum VAP, MOT, and DSM were obtained in each solution containing 0.6 M NaCl (143.8 ± 1.0 µm/sec, 91.3 ± 2.0%, and 230.6 ± 4.2 sec, respectively), 0.6 M KCl (135.1 ± 3.1 µm/sec, 91.1 ± 3.1%, and 230.3 ± 3.7sec, respectively), 0.2M CaCl2 (105.3 ± 4.7μm/sec, 47.9 ± 2.7%, and 120.7 ± 1.3 sec, respectively), 0.2 M MgCl2 (107.3 ± 3.0 m/s, 42.1 ± 3.3%, and 120.3 ± 4.8 sec, respectively), and osmolality of 400 mOsm/kg (145.1 ± 2.5 µm/sec, 93.0 ± 2.1%, and 346.5 ± 4.4s, respectively). We used these mediums as artificial insemination media for fertilizing matured eggs. The results showed that the fertilization and hatching rates in 0.6 M NaCl (75.3 ± 0.6% and 57.0 ± 2.4%, respectively), ASW (70.8 ± 1.2% and 51.2 ± 1.8%, respectively), or 400 mOsm/kg (72.9 ± 1.8% and 55.3 ± 1.6%, respectively) were higher than that in seawater (63.9 ± 1.2% and 39.2 ± 3.9%, respectively). In conclusion, using 0.6 M NaCl, ASW, or 400 mOsm/kg as an artificial insemination medium is effective for fertilizing of waigieu seaperch. 相似文献
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Aquaculture International - The world population continues to increase day by day. Therefore, aquaculture needs to grow in order to response the need for protein foods and to cope with the problem... 相似文献