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1.
胭脂鱼全人工繁殖及苗种培育技术   总被引:2,自引:0,他引:2  
2007年在从化茂墩养殖基地对人工繁殖子一代胭脂鱼经强化培育达性成熟的亲鱼,注射DOM、LRH—A2及HCG混合催产剂,在水温15-19℃时催产,效应时间为12—20h,催产率平均达89%。采用人工干法授精、流水孵化,受精率和孵化率分别可达92%、85%。鱼苗和鱼种在微流水条件下培育,成活率可达80%和93%。  相似文献   

2.
魏国  韩玉林 《水产科学》1997,16(2):34-35
为了探讨北方地区团头鲂亲鱼的早熟早产,我们在月亮泡水库苗种繁育场,利用室内鱼池进行团头鲂亲鱼早春强化培育。于5月17日亲鱼早产成功,比室外池塘培育早产了20天以上,催产率89.5%,受精率57%,孵化率71%,得苗24.2万尾,为北方地方团头鲂亲鱼早繁闯出了一条新路。  相似文献   

3.
作者于1996的在简阳市进行了南方大口鲶秋繁试验,经100天培育,催产繁殖,获受精率90.4%,出苗率80.5%的结果,强化培育春季人工繁殖过的亲鱼,改用新催产药物,提供适宜催产条件,可成功进行秋季繁殖。  相似文献   

4.
黄颡鱼人工繁殖技术研究   总被引:1,自引:0,他引:1  
2002~2003年进行了黄颡鱼人工繁殖6批次人工催产试验。结果表明,黄颡鱼亲鱼采用在成鱼池或亲鱼池中套养方式培育,其催产效果优于专池培育的催产效果。黄颡鱼人工繁殖催产三率分别为催产率69%~82%、受精率63%~81%、孵化率63%~73%。同时进行了不同孵化水源对黄颡鱼催产孵化效果的比较试验.池塘过滤水孵化效果好于曝气的自来水。  相似文献   

5.
1996年在简阳市养殖开发研究了所进行了南方大口鲶的秋季繁殖,即强化培育春夏季产卵的亲鱼,雌雄比为1:1,亲鱼体重6-12kg经过100天左右培育,催产繁殖,催产率为100%,绝对怀卵量2~5.2万粒,受精率为90.4%,出苗率为80.5%,该实验表明,鲶鱼秋繁是可行的,能进行批量生产秋苗,效果良好,效益可观,此法可推广。  相似文献   

6.
三角鲂(Megelobrama terminalis)隶属鲤形目、鲤科、鲂鳊亚科、鲂属。自1998年至2003年共催产亲鱼14批、1022组,平均催产率92%,受精率95。2%,孵化率88。3%,繁育出水花鱼苗1。6亿尾。现将本人几年来大批量开展人工繁殖总结的几个关键技术环节介绍如下:一、亲鱼培育与选择 1.亲鱼培育培育池面积2~5亩为宜,  相似文献   

7.
本文报道2006年度绥芬河大麻哈鱼人工繁殖与孵化放流试验。于2005年秋共采捕亲鱼153组,其中雌亲鱼115尾成活,获得蓄养成活率75%。经催产采卵38×104粒,催产率为80%,受精率为74%。稚鱼饲养成活率为91.10%,放流稚鱼25.5×104尾。  相似文献   

8.
三角鲤人工繁殖技术研究   总被引:1,自引:0,他引:1  
从收购天然鱼种进行驯化养殖入手,经3年池塘人工培育获三角鲤亲鱼1676尾,亲鱼培育成活率达96.1%,性腺普遍发育成熟;先后进行了10批600组三角鲤亲鱼的人工繁殖试验,孵化鱼苗680.9万尾,培育成2.5cm以上规格的鱼种631.7万尾;通过设计实施生态刺激诱导产卵、敏感催产药物筛选、催产药物剂量控制、受精与孵化、胚胎发育研究、鱼苗不同培育方式的效果比较等一系列专项研究,摸索总结出一套效果稳定、可靠的三角鲤人工繁殖技术。研究达到的各项技术指标分别为:催产率平均达82.3%;产卵受精率平均达85.5%;孵化率平均85.6%;苗种培育成活率平均92.8%。  相似文献   

9.
1993年在涨渡湖催产鳜亲鱼7组,产卵率100%,获卵45万粒。受精率77.8%,孵化率85.7%,获鱼苗30万尾。经用孵化环道培育成夏花29.5万尾;环道和产卵池培育成寸片21.42万尾。选择1kg以上的适宜规格鳜亲鱼强化培育是提高怀卵量和卵子质量及提高受精率、孵化率、苗种成活率的重要措施,采用环道流水培育苗种效果较好。开口饵料鱼以鳊最好。  相似文献   

10.
1993年在涨渡湖催产鳜亲鱼7组,产卵率100%,获卵45万粒。受精率77.8%,孵化率85.7%,获鱼苗30万尾。经用孵化环道培育成夏花29.5万尾;环道和产卵池培育成寸片21.42万尾。选择1kg以上的适宜规格鳜亲鱼强化培育是提高怀卵量和卵子质量及提高受精率、孵化率、苗种成活率的重要措施,采用环道流水培育苗种效果较好。开口饵料鱼以鳊最好。  相似文献   

11.
The effects of pond fertilization and feeding rate on growth, economic returns and water quality were investigated to develop a low‐cost cage‐cum‐pond integrated system for production of Oreochromis niloticus (L.). Hand‐sexed male fingerlings averaging 19±0.39 and 32±0.69 g were stocked in cages and open ponds at 150 fish cage?1 and 2 fish m?2 respectively. Fish were cultured for 114 days in five triplicate treatments. Cages were installed into ponds and caged fish were fed a 24% protein diet at 3% (T1) and 6% (T2) body weight day?1 (BWD) without pond fertilization, and 6% BWD with pond fertilization (T3). The open water in the fourth treatment (T4) was not stocked but contained caged fish, which were fed 6% BWD for the first 57 days followed by 3% BWD for the remaining period. Ponds in the control (T5) had no cages and were neither fertilized nor open‐pond fish fed. Feeding rate and pond fertilization significantly (P<0.05) affected fish growth, profitability and water quality among treatments. Fish growth, feed utilization, fish yield, water quality and profits were significantly (P<0.05) better in T3 than the other treatments. It was concluded that fish production and economic returns were optimized at 6% BWD in fertilized ponds.  相似文献   

12.
2009年4月在380m2的土池投放大弹涂鱼2龄亲鱼35kg,5月23日-29日和6月6日-11日先后产出两批仔鱼,共260万尾,于5月29日和6月11日晚采用管道通过自然落差移到室内育苗池,经45d-47d培育,育出幼鱼79.1万尾,平均全长为22.71mm,总成活率30.42%。试验表明把土池产出的仔鱼引到室内进行培育,是突破大弹涂鱼生产性育苗难关的有效方案。  相似文献   

13.
试验以广州梅县鱼类苗种场为试验基地,研究了池塘水体自然净化系统技术在鱼类人工繁育中的应用。试验中应用成果的核心技术对该场老化鱼池和陈旧设施进行调整和改造,形成了鱼类人工繁育两套鱼池水体自然净化系统。结果显示:经过2007—2008两年运行试验,25亩鱼池和繁育设施展现出高效功能,亲鱼成熟率和催产率达100%,受精率和孵化率达95%以上,年鱼苗生产总量达5亿多尾的规模化程度,比试验前提高效率达38.7%;育成10 cm以上的草鱼鱼种成活率达80%以上。结果表明,该两套系统特别适合水源较为缺乏,水质不同程度污染区域应用;也可作为鱼池建设和改造升级的技术支撑。  相似文献   

14.
The first attempt to rear the gilthead seabream, Sparus aurata, in brackish water ponds in Egypt was conducted from April 1976 to February 1977. Experimental ponds were stocked with Sparus aurata fry of about 32 mm and 1.5 g average length and weight respectively at a rate of 3000 fry per one feddan of pond water (i.e. 0.42 ha). The growth rate was recorded monthly. An average length and weight of 190 mm and 78 g respectively was attained after 8 months without supplementary feeding or fertilization of pond water. mathematical equations expressing length-weight relationship and condition factor were derived for both wild and reared fish. The higher values of condition factor obtained for the reared fish in comparison to the wild fish signify their improved condition and hence their suitability for farming in Egypt.  相似文献   

15.
云南光唇鱼的人工繁殖研究   总被引:4,自引:3,他引:1  
对云南光唇鱼人工繁殖技术和胚胎发育进行了初步的研究。采用鲤鱼脑垂体与释放激素类似物等组成的混合催产剂,在19.8~24.3℃的水温下,效应时间为26~28 h,平均催产率83.3%;在流水中孵化,受精率为77.8%,受精卵经过102 h出膜,184 h仔鱼开始平游,孵化率为41.2%。  相似文献   

16.
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   

17.
Abstract

One of the most important issues concerning fish-pond fertilization is the determination of the optimal amount of fertilizer to be applied to the pond system. Another important concern is the suitability of fish species for polyculture in order to optimize production. The dynamics of nutrients, phytoplankton, and fish is a complex subject and practitioners are often compelled to formulate solutions without detailed scientific and practical consideration. The primary objective of pond fertilization is to maintain an optimal nutrient concentration for sustained biological production. Current fertilization practices in the Asia-Pacific region include: a fixed rate of fertilization and fertilization based on water color. Individual pond ecology determines how fertilization affects pond productivity, not the pond's physical location in relation to international borders. There is no universal recipe of “maximal” fertilization rates due to pond-specific variability. There is also no clear guide in the literature with regard to many aspects of fish-food; the type of organisms consumed, mechanisms of food consumption, and the digestibility and nutritive value of plankton. The usual practice is to divide fish according to their foraging in natural habitats; feeding on phytoplankton, zooplankton, zoo benthos, or detritus. The distinction between different feeding habits is not always absolute as many species of fish may change food preference depending on the abundance of different food items. This paper reviews the nutrient (nitrogen, N and phosphorus, P) management in regard to pond fertilization; use of organic and inorganic fertilizer and the impacts on fish production; use of organic fertilizer from different organisms (pig, cow and buffalo) and their interactions with primary production and water quality; optimum N:P concentration in pond water; and individual pond factors and their influence on fish production. A significant interaction was evident with time between water quality variables such as pH and alkalinity, and other factors, including manure type and fish species composition. This was reflected in the difference between pig and cow manure treatments. A significant interaction between species composition and fish production has been demonstrated. Fish survival and biomass production was influenced by the stocking ratio of the: rohu, Labeo rohita; mrigal, Cirrhinus mrigala; and Nile tilapia, Oreochromis niloticus. The recommended nutrient level for pond fertilization based on the South Australian Research and Development Institute (SARDI) and Research Institute for Aquaculture No. 1 (RIA#1) study is 1 ppm N:0.5 ppm P. The required quantity of fertilizer varies significantly with time. However, regional research is highly recommended to optimize fish production focusing on significant climate variability, which affects both primary and secondary production.  相似文献   

18.
Abstract

Most breeding programs for the Australian native freshwater silver perch, Bidyanus bidyanus, are based on fish originally captured from natural populations. However, over the last 20 years, there has been a dramatic decline in the distribution and abundance of silver perch in the wild and the species now has the conservation status of “vulnerable.” Unless broodfish can be domesticated a serious shortage is imminent. The aims of this study were to determine the age and size at sexual maturity and the reproductive performance of silver perch reared in captivity. Fingerlings (mean weight, 4.0 g) from a hatchery were stocked into an aerated 0.32-ha earthen pond at a density of 22,000 fish/ ha for 12 months, harvested, and restocked at 10,000 fish/ha for a further 2 years. The fish were fed a formulated diet containing 35% crude protein. No fish were mature at 1 year of age; at 2 years, most males (93%; total length, 304.0 mm, weight 412.7 g), but no females were mature; and at 3 years, most females (97%; 316.4 mm, 549.6 g) were mature. Three-year-old fish injected with 200 IU/kg human chorionic gonado-trophin spawned viable gametes. High fecundity (mean 139,286 eggs/ kg), fertilization rates (84.5%) and hatch rates (76.8%) demonstrate that broodfish can be domesticated and the life cycle of silver perch can be closed. The use of domesticated broodfish will eliminate reliance on wild populations and provide a basis for future hatchery production and selective breeding programs.  相似文献   

19.
从1986至1990年,在黑龙江水产研究所松浦试验场,用本所培育的散鳞镜鲤与由联邦德国引进的德国镜鲤进行了品系间杂交,获得了一个形态与两亲本稍有不同,而生长等经济性状具有明显超亲优势的杂交种——松浦镜鲤。根据对体长、体高、头长、吻长、眼径、尾柄长和鳃耙数等16个可数、可量性状的测定。松浦镜鲤在头长、吻长、眼径、尾柄长和鳃耙数等5个性状上与双亲不同,而其它性状都界于双亲之间,体高、体厚偏向母本,而尾柄高、鳃耙数偏向父本。因此表现出头小、吻延长,眼径扩大,鳃耙数增加等有利运动和摄食,根据4年的池塘生长对照和抗寒、抗病测验,松浦镜鲤一至三龄鱼的越冬成活率分别比双亲高70.3%、116.2%和17.8%。池塘饲养成活率一至三龄鱼分别比双亲高10%、18.5%和14.7%。由于池塘成活率高,因此,群体产量一至三龄鱼分别比双亲高81.3%、63.6%和59.9%(三个池塘的平均值)。个体体重瞬时增长率一至三龄鱼分别比双亲快7.7%、6.5%和25.82%(三个池塘的均值)。含肉率比双亲均值高8.9%。  相似文献   

20.
根据对引进的美国杂交条纹鲈的生长发育需求及生理生态要求和食性,应用我国池塘精养技术,肥水培育苗种,进行调控水质,培养天然饵料,精心投喂,科学管理,经1年饲养管理,共出塘鱼种26000余尾,平均全长达14.0cm,平均尾重31.9g,成活率达22.7%。得出初步的苗种培育技术。  相似文献   

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