鱼种池套养匙吻鲟试验初报

匙吻鲟(Polyodon Spathula)属鲟形目,匙吻鲟科,是淡水中大型的经济鱼类,它肉味鲜美,营养丰富,深受广大消费者的青睐,具有较高的养殖价值和观赏价值。为发展匙吻鲟养殖,摸索其养殖技术,鄱阳湖水产科技园、庐山区水科所、庐山区科技局承担了《鱼种池套养匙吻鲟养殖技术》研究。现     

美国匙吻鲟池塘套养斑点鲈出高效

淡湖南省万龙渔场自2002年1月至10月进行了池塘主美国匙吻鲟并套养斑点鲈试验,取得了较好的效果,现将有养殖技术介绍如下:一、池塘条件养殖池1口,面积为6亩,水深1.8米,泥沙底质,池底坦,淤泥浅,池呈长方形,四周水泥护坡,池塘内安有一台3瓦的增氧机。水源来自池塘旁的一水渠,干旱时取用井水,源充足,水质清新,常年水中溶氧量在4毫克/升以上,水pH值6.5～7.5,注排水方便。二、放养前准备2001年12月30日,养殖池用生石灰100千克/亩带清塘消毒,以清除池中的敌害生物、野杂鱼、病原体。鱼苗塘前7～10天,施150千克/亩的发酵牛粪,以繁殖天然饵料,使鱼…     

鲫鱼池塘套养匙吻鲟试验

正鲫鱼是我国重要的经济型食用鱼类,以鲫鱼为主养品种的池塘养殖在全国各地均有开展。匙吻鲟属鲟形目、匙吻鲟科,其肉质鲜美,肉无间刺,尤其是吻部富含胶原蛋白,营养丰富,是名优的水产养殖品种。在传统的养殖模式中,主养鲫鱼的池塘通常套养鲢鳙鱼,而匙吻鲟在生活习性和食性上与鳙鱼相似,其市场价格     

蟹池套养模式与技术管理

介绍了蟹池套养鳜、黄颡鱼、沙塘鳢、鲌鱼、小龙虾模式,以及相关技术管理措施。     

丁[鱼岁]池塘套养美国匙吻鲟技术

匙吻鲟（Polyodonspathula）隶属于鲟形目，匙吻鲟科，俗称鸭嘴鲟，又称“长寿鱼”，原产于美国的密西西比河，是美国大型经济鱼类。该鱼肉质细嫩，味道鲜美，无刺，营养价值和食用率较高，生长速度快，抗病力强，易捕捞，市场价值较高，其养殖前景一直被国内外水产界所看好。该鱼食性与鳙鱼十分相似，     

河蟹池套养鳜鱼养殖技术

为了提高水产养殖业综合经济效益 ,促进河蟹养殖的健康发展 ,2 0 0 1～ 2 0 0 2年 ,我们采取示范推广与生产相结合的方法 ,试验探讨并推广河蟹池套养鳜鱼健康养殖技术 ,取得了明显效果。2 0 0 2年 ,推广面积达 1 5 0 0亩 ,平均亩产商品蟹5 2 .6ｋｇ ,平均规格 1 48ｇ ,鳜鱼 5 .5ｋｇ ,平均规格0 .64ｋｇ ,亩毛利 1 42 6.5元 ,鳜鱼占毛利的1 1 .6%。与单养河蟹池塘相比 ,亩均增收 2 80元 ,不但增加了鳜鱼产品 ,而且河蟹产量略有提高 ,品质也有所提升。现将河蟹池套养鳜鱼健康养殖技术介绍如下 :1试验地点与塘口条件试验地点选定在省级农业科…     

浅谈鲫鱼池塘套养匙吻鲟技术

匙吻鲟属鲟形目、匙吻鲟科,是北美洲的一种名贵大型淡水鱼类,在我国部分地区已有养殖。鲫鱼系四大家鱼之一,是传统的养殖鱼类品种。在传统的养殖模式中,主养鲫鱼时通常套养鳙鱼,鳙鱼在食用价值以及经济价值上较匙吻鲟有一定的差距。匙吻鲟在生活习性和     

高寒地区肥水养鱼池塘套养匙吻鲟增效技术

匙吻鲟(Polyodonspathula)隶属于鲟形目,匙吻鲟科。本试验主要是对高寒地区肥水养鱼池塘套养匙吻鲟经济效益进行分析,目的是为今后匙吻鲟大面积推广奠定基础。一、材料和方法1.试验场地及池塘条件试验地点选在黑龙江省巴彦县成祥苗种繁育基地,池塘面积为10亩,长方形,南北走向,平均水深2.2米,底泥厚度10～15厘米。2.水源水源为地下井水,水量充足,无污染。3.苗种来源鲤鱼、白鲢夏花为苗种繁育基地自行发塘培育的,匙吻鲟苗种来自哈尔滨市农业科学院水产研究分院。4.苗种放养鱼苗采用肥水下塘,鱼苗入池前15天采用干法清塘消毒,每亩池塘用生石灰…     

蟹池套养鳜鱼生态养殖技术

为了提高养殖综合经济效益，促进河蟹养殖业的可持续发展，２０００年至２００１年，我们采取示范推广与生产相结合的方法，试验探讨和推广应用了蟹池套养鳜鱼生态养殖技术，取得了明显效果。２００１年，推广应用面积达３１９３６亩，平均亩产商品蟹４２．７公斤，规格１４１克，鳜鱼５．１公斤，规格０．６２公斤，亩毛利１３２８．２９３元，鳜鱼占毛利的１１．３％。与单养河蟹池塘相比，推广应用面积亩均增收２６０元，不但增加了鳜鱼产品，而且河蟹产量非但未减却略有提高，同时品质也有所提升。现将蟹池套养鳜鱼生态养殖技术介绍如下…     

北方地区丁鱼岁一龄鱼种养殖模式研究

为探寻在北方地区进行丁养殖的最佳放养模式,在相同的养殖条件下,以3种不同的放养模式进行了一龄鱼种的培育试验。3种模式丁夏花的放养密度分别为1200、1300、1500尾/亩,同时搭配鲢、鳙夏花,3种模式的搭养量均为鲢1200尾/亩,鳙500尾/亩。经过连续3年的试验,前两种模式无论产量、出池规格和养殖效益都好于后一种模式,尤以放养密度1300尾/亩的模式为最佳。     

匙吻鲟大规格鱼种的池塘培育试验

匙吻鲟是一种纯淡水鱼类，能常年生活在内陆江河、湖库及池塘中，适温范围为0～37℃，最适生长温度22～30℃，食性以浮游动物为主，人工驯化可食颗粒饲料，性情温和，习性与花鲢相似，易捕捞。我单位渔场于2003年5月4日引进匙吻鲟水花1万尾，经暂养池饲养达寸片后转入鱼种池主养，并搭配银鲫套养，取得了较好的效果．现将有关养殖技术介绍如下。     

池塘主养匙吻鲟商品鱼技术

在水库坝下0．4hm^2、水深2．5m的池塘中，开展以匙吻鲟为主，配养鲢、草鱼、青鱼、团头鲂的养鱼试验。匙吻鲟饵料系数为2，饵料成本占生产成本48％，匙吻鲟单产超过3000kg／hm^2，投入产出比1：2。     

Cryopreservation of Paddlefish Polyodon spathula Milt

Abstract.— A practical procedure for cryopreserving milt of paddlefish Polyodon sparhula was developed to obtain thawed spermatozoa that would fertilize eggs and permit hatching of normal larvae. Milt was mixed with a cryoprotectant medium containing DMSO (2.4 M) in a ratio of 3:1(milt: medium; final concentration of DMSO 0.6 M), stored in 5.0-mL freezing straws, and frozen in dry ice (15 min) and then in liquid nitrogen. A total of three replicates were made; the milt of a different male was used in each replicate. Motility of the thawed spermatozoa decreased to 50%-25% as compared to 100% motility of the fresh (control) spermatozoa. Hatching of paddlefish (16.3 ± 2.2%) from eggs fertilized with thawed spermatozoa was significantly lower ( P ≤ 0.01) than the hatch rate (90.8 ± 2.5%) for the control. It was suggested that an increase in viable motile spermatozoa to egg would result in better fertilization and hatching of paddlefish.     

Induced Meiotic Gynogenesis of Paddlefish Polyodon spathula

Viable, diploid gynogenetic (gynogenotes) paddlefish Polyodon spathula were produced by activating eggs with ultraviolet-irradiated shovelnose sturgeon Scaphirhynchus platorynchus spermatozoa and heat shocking. Without irradiation treatment, sturgeon spermatozoa appeared to activate the eggs (up to gastrulation), but did not result in any viable hybrids. Experiment 1 determined that heat-shock treatment of 35 C for a 2-min duration within the interval of 2–22 min post-activation resulted in highest yield of gynogenotes (12–19%) from eggs incubated at 18 C. Experiment 2 applied the heat shock treatment at 35 C from 14.0 to 28.0 min in 2-min intervals after activation at 18 C for a larger scale of gynogenetic production. Both experiments showed that the best yields of gynogenotes were obtained when the heat shock treatment occurred at 16, 18, and 20 min after activation. When these times were expressed in terms of τ₀. units (duration of one mitotic cycle of synchronous cell division related to water temperatures), optimal activations were 0.26, 0.29, and 0.32τ₀ (τ₀@ 18 C = 63.5 min). Experiment 3 tested the utility of τ₀. at two different pre-shock incubation water temperatures of 18 C and 16 C, and determined that there was no significant interaction in percentage of viable gynogenotes between two different incubation temperatures and the mitotic intervals (0.21, 0.26, 0.31, 0.36, 0.41τ₀) tested. Best survival of gynogenotes occurred when eggs held at either pre-shock incubation water temperatures were shocked at 0.26τ₀ All gynogenotes examined were histologically confirmed to have ovarian tissue and were determined to have similar oocyte development to that of normal female (control) paddlefish.     

放养在胜利水库中的匙吻鲟的生长

在黑龙江省青冈县胜利水库放牧式养殖了匙吻鲟（Polyodon spathula）,同时调查了水库的水质及浮游动物的种类组成和生物量,并随机设置挂网,不定期调查捕获匙吻鲟的生长状况。结果发现：该水库水质符合渔业水质标准（GB11607—89）,浮游生物的生物量较高。放养的匙吻鲟生长良好,当年可超过越冬规格;日平均增重3．31％,体长增长1．17％,结果表明：匙吻鲟适于在北方湖泊、水库等具备越冬条件的水体进行放牧式养殖。     

匙吻鲟池塘饲养试验

匙吻鲟(Polyodon spathula)的原产地在美国中部和北部，它生活于大型河流及湖泊中，是一种淡水经济鱼类。匙吻鲟是一种软骨鱼类，躯干呈流线型，尾部侧扁，体表光润无鳞，眼甚小，口端有一个形似匙柄的长吻，约占体长的1／3。该鱼肉质鲜美，无肌间刺，市场售价高，卵、皮亦具有极高     

丁(鱼岁)池塘主养成鱼试验

为调整养殖品种结构,提高效益,龙庆公司于2003年引进丁鱥寸片进行池塘成鱼养殖,2004年6月全部收获,成活率70％,饵料系数1．8,纯利润8．5万元／hm^2,经济效益显著。     

Improved Cryopreservation of Sperm of Paddlefish (Polyodon spathula)

Experiments were performed to improve protocols for sperm cryopreservation of paddlefish (Polyodon spathula), a species for which there has been limited study. The first experiment was conducted to investigate the effects of two extenders (modified Tsvetkova’s extender: mT and modified Hanks’ balanced salt solution: mHBSS) in combination with methanol (MeOH) and dimethyl sulfoxide in two concentrations (5 and 10%) on the postthaw motility and fertilization rates of cryopreserved sperm. The highest postthaw motility (85 ± 5%) was observed when sperm were frozen using mT extender with 10% MeOH as cryoprotectant. Extenders (P = 0.0018) and cryoprotectants (P = 0.0040) each had a significant effect on the postthaw motility of paddlefish sperm. The highest fertilization (80 ± 3%) was found when eggs were fertilized with sperm frozen with mT extender in combination with 10% MeOH. However, there was no significant difference among fertilization rates when MeOH was used as a cryoprotectant in either concentration or in combination with either mT or mHBSS extenders. In the second experiment, 4000 eggs were fertilized with the pooled contents of five straws of thawed sperm (total volume of 1.25 mL) using mT extender in combination with 5% MeOH, and hatch rates as high as 79 ± 5% were observed. A third experiment was also conducted to clarify the role of MeOH concentration; however, no significant difference was found among fertilization and hatch rates when either 5 or 10% MeOH was used as a cryoprotectant. These results suggest that MeOH is a safe and reliable cryoprotectant for freezing of paddlefish sperm and obtaining viable postthaw sperm for consistent fertilization and hatch rates. Further, this experimental protocol is relatively simple and applicable for commercial hatchery production of paddlefish.     

丁(鱼岁)仔幼鱼的形态特征观察

丁(鱼岁)(Tinca tinca Linnaeus)分类上属鲤科,雅罗鱼亚科,丁(鱼岁)属.