澳洲银鲈人工繁殖试验

澳洲银鲈 ( Bidyanus bidyanus)原产于澳大利亚墨累—达令 ( Murray- Darling)河流域 ,属广温性鱼类。该鱼体色银白 ,肌间刺少 ,肉质鲜美 ,头小 ,可食部分所占比例大 ,食性杂 ,不互相残食 ,生长快 ,适宜在淡水池塘、水库养殖。近年来 ,闽南地区从台湾省引进该鱼 ,获得较好养殖效益。但由于苗种来自台湾 ,价格较高 ,难以推广养殖。自 1999年以来 ,笔者进行了银鲈人工繁殖试验 ,并获得成功。现将试验总结如下。材料与方法　　 1.亲鱼试验用亲鱼是用 1998年 5月从台湾引进的 3cm左右银鲈鱼种在本地池塘饲养选留而得。选择体重 1.1～ 1.2 kg、…     

澳洲银鲈池塘养殖试验

澳洲银鲈（Bidyanusbidyanus）原产于澳大利亚墨累———达令（Murray－Darling）河流域，属广温性鱼类，生存温度范围２～３６℃，最适生长温度范围１８～３０℃，能在淡水、半咸水中生活。该鱼具有食性杂、生长快、病害少、对环境的适应能力强等特点，是澳洲重要的水产品养殖对象。泉州市某公司１９９７年从澳大利亚引进并试养成功，产品投放市场后深受人们喜爱。现将澳洲银鲈的池塘养殖技术总结如下。一、人工繁殖在人工养殖条件下，澳洲银鲈２龄可达性成熟，生产上一般选用３龄以上亲鱼（雄鱼２龄以上）进行人工催产，繁殖季节为４～…     

淡水银鲈人工繁殖与养殖技术

淡水银鲈(Biduanus bidyanus)属鲈形目(Peraponidae)、鱼刺科(Terapoidae)。原产于澳大利亚墨累河(Murray-Dadling)流域，是澳洲东部有名的淡水经济鱼类。淡水银鲈体呈银灰色，细鳞，肉质好，无肌间刺．肌肉具弹性且略有香味，体内胶性脂肪充积，肥而不腻，营养丰富，是一种商品价值高的优良品种。据记载     

澳大利亚银鲈的人工繁殖和养殖

银鲈（Ｂｉｄｙａｎｕｓｂｉｄｙａｎｕｓ）属鲈形目（Ｐｅｒｃｉｆｏｒｍｅｓ）,条纹鱼科（Ｔｅｒａｐｏｎｉｄａｅ）,原产于澳大利亚墨累－达令（Ｍｕｒｒａｙ－Ｄａｒｌｉｎｇ）河流域。一般体长３５～４０厘米,体重０－７５～１－５公斤,最大个体可达８－０公斤,是该流域游钓业、捕捞业特别喜爱的四种鱼类之一。其资源量日益减少,目前在该流域的大部分地区已不多见。银鲈体形似梭形,色银白,故得名。肌间骨少,肉质鲜美,可食部分大,肉片率达４０％。银鲈适应性广,生长较快,体长５厘米、体重２克的鱼种,１２个月可生长至１…     

金鲈、银鲈

金鲈(Macquaria ambigua)原产于澳大利亚墨累溪河和达岭河水系的维多利亚支流中，经过多年的迁移引种，现已遍布于澳大利亚许多水域。金鲈的最大个体可达23公斤，体长75cm，一般在5公斤以下。栖息环境多集中于较为温暖，浑浊且流速较慢的水域中，     

银鲈全人工繁殖技术初探

银鲈(Bidyanus Didyanus)原产于澳大利亚墨累河流域，是澳大利亚著名的淡水经济鱼类。银鲈体呈银灰色，细鳞；适温范围广，2～37℃皆可生存，最适生长水温20～28℃；广盐性，在纯淡水及半咸水中均可生存；食性杂，在河流中以浮游动物、水生昆虫、软体动物等为食，人工养殖条件下可摄食人工配合饲料；性温和，起网率高。     

澳洲银鲈的生物学与工厂化养殖试验

澳洲银鲈是上世纪90年代末引入我国的水产养殖品种,原产于澳大利亚,属鲈形目,体形与其它鲈鱼相似,该鱼具有广泛的食性和对温度的适应性,适合我国北方地区养殖。2004年天津市津南国家农业科技园区引种3厘米澳洲银鲈2万尾进行工厂化养殖,获得成功,本文介绍澳洲银鲈的生物学及工厂化养殖过程。一、澳洲银鲈生物学概况1.形态结构澳洲银鲈鱼体呈纺锤体型、侧扁,头部尖细、口小。侧线上方至背部颜色较深,呈灰黑色;侧线下方至腹部为银白色。侧线鳞平直、明显。2.食性与生长澳洲银鲈是澳州当地温和的养殖品种,生活在河流中,以小虾、昆虫、浮游生物、…     

澳大利亚银鲈的人工繁殖及其养殖

银鲈(Bidyannsbidyanus)属鲈形目(Perciformes),条纹鱼科(Teraponidae),原产于澳大利亚墨累一达令(Murray-Darling)河流域。一般体长35—40厘米,体重0．75—1．5公斤,最大个体可达8．0公斤,是该流域游钓业、捕捞业特别喜爱的四种鱼类之一。其资源量日益减少,目前在该流域的大部分地区已不多。     

澳洲银鲈及其养殖技术

澳洲银鲈〔Ｂｉｄｙａｎｕｓｂｉｄｙａｎｕｓ(Ｍｉｔｃｈｅｌｌ)〕又名银鱼立、甘旨鱼 ,英文名ＳｉｌｖｅｒＰｅｒｃｈ。原产地为澳大利亚莫莱 -达令河流域。作为食用鱼 ,其肌间刺少、肉质鲜美、肥而不腻 ,受到消费者喜爱 ;由于澳洲银鲈的适应性和抗病力强 ,生长又快 ,广东、福建等地已进行移植。现根据近年来上海市南汇区水产技术推广站示范基地养殖澳洲银鲈的经验 ,对其形态特征、生态习性及养殖技术作简单介绍。一、形态特征据澳大利亚养殖专家ＬａｎｃｅＰｅｒｋｅｒ先生介绍 ,澳洲银鲈的祖先生活在海里 ,后来移至淡水中生存繁衍 ,故在…     

养殖澳洲银鲈肌肉营养成分测定

采用常规分析方法测定了工厂化养殖的澳洲银鲈(B idyanus bidyanus)的肌肉营养成分。结果显示,澳洲银鲈肌肉干物质中粗蛋白和粗脂肪含量分别为85.80%、9.82%。100 g肌肉中8种常规矿物元素含量分别为Ca16 mg、Mn 0.02 mg、Zn 0.5 mg、Cu 0.02 mg、K 371 mg、Na 27 mg、Mg 27 mg、Fe 0.6 mg;氨基酸含量为18.69 mg,其中必需氨基酸含量为7.5 mg;脂肪酸含量为10.2 mg,其中饱和脂肪酸3.62 mg,不饱和脂肪酸6.58 mg。     

Domestication of Silver Perch,Bidyanus bidyanus,Broodfish

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.     

银鲈胚胎和仔鱼的发育

本文对银鲈（Ｂｉｄｙａｎｕｓ ｂｉｄｙａｎｕｓ）胚胎和仔鱼的发育进行了观察,详细描述了发育各期的形态特征和所需时间。受精卵充分吸水后呈圆形,为浮性卵,在２３－２５℃时,孵化时间约为３２ｈ,仔鱼出膜后第３天卵黄囊消失,第５天开始摄食,到第７天基本发育完善。     

金鳟养殖病害防治技术

金鳟(Bidyanusbidyanus)隶属于鲑科、鳟属,又名甘脂鱼、黑珍珠石斑,是日本长野县水产试验场从虹鳟突变种选育出的性状稳定的金黄体色新品系,其全身终生呈金黄色或黄色,腹部色泽稍浅,故此得名"金鳟".我国于1996年由黑龙江水产研究所从日本引进.     

Epitheliocystis in silver perch, Bidyanus bidyanus (Mitchell)

Cultured juvenile silver perch, Bidyanus bidyanus (Mitchell), were affected by epitheliocystis, with a prevalence of up to 75%. The condition affected 2–96% of gill filaments. Granular basophilic cysts ranged from 10 to 87 μm and had a round-to-oval shape. The infected cells were positioned centrally within a lamella, often close to its tip, and their identity was difficult to determine, but the involvement of pillar cells could not be precluded. The size of pathogen was within the range previously reported. The pathogen had two morphological forms, which were positioned differently within the cyst. The form located more in the centre was rod-shaped with an electron-dense core and electron-lucent vesicles on the sides of the core. Its mean length was 498.14 nm (SD = 47.68 nm), and its mean width was 145.14 nm (SD = 9.53 nm). The form present in a more peripheral position had an irregular shape, often did not show the electron-dense core and did not have the electron-lucent vesicles. Its mean length was 704 nm (SD = 170.29 nm) and its mean width was 152.4 nm (SD = 16.40 nm). Both forms were enclosed by a double trilaminar membrane. This is the first confirmed report of epitheliocystis in Australian freshwater fish.     

银鲈的染色体和同工酶分析

采用肾细胞直接制片法获取银鲈(Bidyanus bidyanus)有丝分裂中期染色体。核型分析表明,银 鲈的染色体数2n=48,核型公式为2m+2sm+6st+38t,臂数 NF=52,未发现异型性染色体,但在一条染 色体中发现随体。采用聚丙烯酰胺凝胶电泳法分析银鲈血清、肝脏、肌肉3种组织的乳酸脱氢酶(LDH)、苹 果酸脱氢酶(MDH)、酯酶(EST)等3种同工酶图谱,结果表明3种同工酶在银鲈中有很强的组织特异性。     

Estimating digestible protein requirements of silver perch, Bidyanus bidyanus Mitchell

In this study, we estimated requirements for digestible protein, using intact protein sources, at one digestible energy content. Using digestibility data for silver perch (Bidyanus bidyanus Mitchell) for a large number of ingredients, we formulated a ‘summit’ diet to contain between 1.4 and 1.8 times the ‘expected requirements’ for digestible essential amino acids (based on requirements for channel catfish, Ictalurus punctatus Rafinesque). A ‘diluent’ diet was formulated to contain 0.4–0.5 times the expected requirements of digestible essential amino acids. Both ‘summit’ and ‘diluent’ diets contained similar digestible energy (14.7 MJ digestible energy kg^?1 for the summit and 13.4 MJ digestible energy kg^?1 for the diluent). Six diets were prepared with the following amounts of summit–diluent diets: 100:0, 80:20, 60:40, 40:60, 20:80 and 0:100. A practical diet widely used by commercial farmers was also included as a control. Ten juvenile fish (2.1–2.6 g) were stocked into each experimental 70‐L acrylic aquarium, and each dietary treatment was randomly assigned to five replicate aquaria. Fish were fed twice daily to apparent satiation for 54 days. Final individual fish weight ranged from 4–15.5 g. Results were analysed using intersecting linear regression analysis. The optimum digestible dietary protein for diets with 13.4–14.7 MJ digestible energy kg^?1, after which protein deposition did not increase significantly, was 28%. Although this study did not determine requirements for individual amino acids, for diets with the digestible energy content used here, requirements for individual amino acids obviously did not exceed the content in the 28% protein diet. These contents are useful as an estimate of ‘recommended levels’ for silver perch diets with 13.4–14.7 MJ digestible energy kg^?1. The proximate composition of fish was affected by diet. Whole body protein and moisture increased, whereas lipid content decreased with increasing dietary protein content (and increasing protein–energy ratio and decreasing lipid). Fish size was also affected by diet; however, the changes in whole carcass proximate composition also occurred for fish fed diets 60:40, 80:20 and the summit diet which were a similar final weight.     

白点鲑与虹鳟、金鳟池塘混养试验

为了提高冷水鱼养殖水平,探索临夏地区生产优质水产品的途径,根据临夏州科技局项目要求,我站于2007年12月25日至2008年11月进行了自点鲑流水池混养技术试验示范,获得了很好的效果。     

澳洲银鲈消化道蛋白酶活性研究

通过对澳洲银鲈消化道蛋白酶活性的测定,结果显示蛋白酶活性以幽门垂最高,为(1780.43±474.52)μg/(g.m in)。蛋白酶活性从高到低顺序为幽门垂>后肠>前肠>胃。胃、肠道蛋白酶的最适pH值分别为2.6和7.4。初步探讨了人工配合饲料中不同蛋白质含量对澳洲银鲈蛋白酶活性的影响,当饲料蛋白质量分数分别为29%、35%和44%时,消化道不同部位的蛋白酶活性有差异。