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真鲷苗种生产技术的开发研究 总被引:8,自引:0,他引:8
1991-1993年在中国青岛市对真鲷苗种生产技术进行了连续三年的开发研究,通过改善亲鱼培育及采卵技术、提高轮虫连续培养及稳定供应技术、提高仔鱼开鳔率、加强饵料的营养强化、设置环流及水面集污器等技术措施、改进和完善了真鲷苗种生产工艺。利用175m^3培育水体,三年中共享出真鲷苗种291.6万尾,各年度的苗种生产量分别为51.8万尾、116.4万尾、123.4万尾;培苗成活率分别为25.6%、32. 相似文献
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真鲷(Pagrosomus major)苗种生产技术的开发研究↑(*) 总被引:3,自引:0,他引:3
1991-1993年在中国青岛市对真鲷苗种生产技术进行了连续三年的开发研究,通过改善亲鱼培育及采卵技术、提高轮虫连续培养及稳定供应技术、提高仔鱼开鳔率、加强饵料的营养强化、设置环流及水面集污器等技术措施、改进和完善了真鲷苗种生产工艺。利用 175m3培育水体,三年中共育出真鲷苗种 291. 6万尾,各年度的苗种生产量分别为 51.8万尾、116.4万尾、123.4万尾;培苗成活率分别为25.6%、32.8%、62.5%;平均单位水体出苗量分别为2960尾/m3、6651尾/m3、9872尾/m3。在国内首次实现苗种生产三年连续成功,并连续突破百万尾大关。同时试验证明利用对虾育苗池进行真纲苗种生产是可行的。 相似文献
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真鲷人工育苗的初步试验 总被引:3,自引:0,他引:3
1990年5月,在60立方米水体中培育出真鲷鱼苗74400尾(全长16.6~20mm),平均单位水体出苗1240尾。幼鱼培育以轮虫、牡蛎幼体、卤虫幼体、鲜鱼肉糜为饵料。幼鱼流水培养,日换水量1~1.2倍。在水温16~21.2℃条件下培育38天。 相似文献
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研究了亲鱼选择、暂养和苗种的饵料转换、日常管理和病害防治等一套工艺流程,在300m^3育苗水体中,育出26.7mm以上黑Jun鱼苗32.15万尾,鱼苗培育成活率33.5%。专家鉴定认为,本成果总体达国内先进水平,其中产仔率、单位水体出苗量等方面属国内领先。 相似文献
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将在近海捕获的14尾黑Jun亲鱼放在海带育苗池内进行流水培育,让其自然产仔。共产健康仔鱼361400尾,产仔率达28.57%。以小球藻、轮虫、卤虫幼体、少量捕天然浮游动物和鱼、虾肉糜为系列饵料,培育20-30天,育出全长14.2-30mm的稚鱼322198尾,平均成活率89.15%;单位水体平均出苗量为6712尾/m^3。 相似文献
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在真鲷养殖中,饵料是一个关键。六十年代后期,日本开始对真鲷不同营养需要量进行一系列的研究。真鲷的平衡饵料中包括百分比含量高的蛋白质,它作为能量的主要来源。根据干重分析,饵料中蛋白质要求最低含量为50%。通过营养学研究,真鲷养殖需要确切的营养成份, 相似文献
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稻田培育1龄幼蟹平均单产达21公斤/100米^2,规格80只/公斤,水稻单产达100公斤/100米^2,取得了较好的经济效益。 相似文献
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J Roo H Fernández‐Palacios C M Hernández‐Cruz A Mesa‐Rodriguez D Schuchardt M Izquierdo 《Aquaculture Research》2014,45(4):689-700
The present study describes the adaptation of longfin yellowtail Seriola rivoliana as broodstock and first larval rearing trials under intensive and semi‐intensive conditions. Fifteen sub‐adults were captured in the South coast of Gran Canaria (Canary Islands, Spain) in June 2007. Fish (initial weight 1.76 ± 0.25 kg) reached a weight of 6.0 ± 1.1 kg in July 2010. Once a year, fish were sampled to determine individual growth in weight and size. In addition, the state of sexual maturity was established based on gonadal biopsies. On the basis of repeated hormonal injection (GnRHa, 20 μg/kg), 10 successful spawns were obtained between July and October 2009, with 92.5 ± 5.5% and 72.6 ± 17.2%, fertilization and egg viability respectively. First results of larval rearing under semi‐intensive conditions, showed an average survival at 30 DAH of 2.5% as compared with 0.5% under intensive conditions. The low survivals under the two rearing conditions in addition to their failure to pass a stress test could be attributed to deficiencies in essential fatty acids as could be seen in both eggs and feeds. Morphometric parameters showed no significant difference between the two rearing systems in 230 DAH larvae. 相似文献
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Jia Geng Christina Belfranin Ian A. Zander Emma Goldstein Shubham Mathur Blanka I. Lederer Riccardo Benvenuti Daniel D. Benetti 《Journal of the World Aquaculture Society》2019,50(2):336-345
This research examined the effect of initial stocking density and feeding regime on larval growth and survival of Japanese flounder, Paralichthys olivaceus. Larval rearing trials were conducted in nine 50‐L tanks with different initial stocking densities combined with different feed rations (20 larvae/L with standard feed ration [LD], 80 larvae/L with standard feed ration [HD], and 80 larvae/L with four times the standard feed ration [HD+]). Larvae were stocked on 0 days posthatch (DPH) following hatching of the fertilized embryos. Larval total length (TL), survival rates, and final densities were observed on larval settlement (32 DPH) to evaluate larval rearing performance. At 32 DPH, there were no significant differences (p > .05) in TL or survival rates between the LD (46.5 ± 17.0%) and HD+ (40.3 ± 9.4%). The TL and survival rate of HD (23.1 ± 3.5%) were significantly lower than that of LD and HD+ (p < .05). However, the larval density of HD was significantly higher than that of LD (p < .05). HD+ achieved the best larvae production (32.27 ± 7.51 larvae/L), supported by sufficient food source, high water exchange, and proper water quality management (routine siphoning, surface skimming). The larval‐rearing protocols and larval development from hatching to metamorphosis is described in detail, with corresponding photographs taken during the experiment. 相似文献
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将建鲤夏花放在池塘内进行集约化养成,给人工驯养养并投喂全价颗粒配合饲料,178天后尾均重由0.9g增长到570g,增重数633.3,成活率79.6%,单产1140kg/100m^2,蛋白利用率为27.5%,饲料系数1.46投入与产出比为1:2.42。 相似文献
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