共查询到20条相似文献,搜索用时 531 毫秒
1.
2.
上海市松江区水产良种场始建于1984年,是区农委属下主要从事水产良种繁育的一个事业单位,1999年被评为市级水产良种场,建立了市团头鲂“浦江1号”保种基地。2003年7月通过国家级水产良种场的验收。该场现有固定资产659万元,养殖水面630亩,其中:亲鱼培育面积250亩,特种水产养殖面积200亩,休闲渔业面积180亩。该场的综合经济实力较强,年创利在40万元以上。现有团头鲂“浦江1号”亲本3121组,后备亲本1099组;长江水系“四大家鱼”原种亲本1286组,后备原种亲本366组;异育银鲫亲本10000尾。年生产各类鱼苗8亿尾,其中团头鲂“浦江1号”鱼苗2亿尾。… 相似文献
3.
4.
团头肪“浦江1号”是上海水产大学经16年努力选育出的一个优良品种,它具有生长快、体型好等特点。吉林省舒兰市水产总站自2001年起,先后从上海市松江水产良种场引进团头鲂“浦江1号”乌子鱼苗近300万尾,并在本地推广养殖,取得了良好的效果,最显著的成绩是将培育大规格团头鲂鱼种的时间由过去的两年减少为目前的一年, 相似文献
5.
团头鲂“浦江1号”一个RAPD标记的SCAR转化 总被引:6,自引:0,他引:6
从100个10bp寡核苷酸引物的扩增带中,筛选出了3个RAPD特异扩增带,即团头鲂“浦江1号”群体所具有的S37^277bp、S11^2660bp带,以及对照群体所具有的S28^946bp带。该3条RAPD特异扩增带经回收、克隆和测序,并根据部分序列信息分别设计了3对各20bp的正向引物和反向引物。用3对引物分别在“浦江1号”群体和对照群体中进行PCR扩增,分别产生了Sc-1(248bp)、Sc-2(540bp,460bp)和Sc-3(320bp)4个SCAR扩增带。其中,Sc-2(540bp,460bp)和Sc-3(320bp)3个SCAR扩增带在“浦江1号”和对照群体中均呈阳性,不能有效地区分这2个群体;而Sc-1产生的248bp带仅在“浦江1号”群体中出现,对照群体中未出现此扩增带。采用大样本对该Sc-1标记(248bp)进行验证,结果发现,在团头鲂“浦江1号”良种群体的分布频率高达91.1%(82/90)以上,而在淤泥湖原种群体中的分布频率为14.3%(8/56),Sc-1标记在良种群体中的高频率,可作为检测团头鲂“浦江1号”良种的一个重要的分子遗传特征指标;另外,该Sc-1标记在团头鲂“浦江1号”群体中的高出现频率,也说明了在长期(16年)和高强度(0.03%~0.04%选择率)的选育过程中,团头鲂“浦江1号”已大大提高了某些优良性状基因的等位基因频率。 相似文献
6.
团头鲂“浦江一号”是经过15年精心选育而成的良种,其体型优良,遗传性状稳定,生长速度比原种提高30%。21308年从上海海洋大学南汇水产动物种质试验站引进团头鲂“浦江一号”亲本150对,后备亲本1000对,亲本体重1.Okg/尾,后备亲本体重75g/尾,2010年繁殖成功,生产水花200×10^4尾。 相似文献
7.
8.
9.
团头鲂“浦江1号”是由上海水产大学历时近16年的精心选育而获得的生长优势明显、遗传性状稳定的一个团头鲂良种,在同一养殖环境里团头鲂“浦江1号”生长速度比淤泥湖原种提高29%以上。该品种经过十几个省、市的养殖情况结果分析,生长优势相当突出,特别在东北及中西部地区,第二 相似文献
10.
团头鲂原产于长江中游的一些大中湖泊中,并逐渐成为我国主要水产养殖对象之一。但自上世纪八十年代中期以来,我国各地团头鲂养殖群体先后出现了较为严重的退化现象,主要表现为生长速度减慢、性成熟提早、体型变长变薄及抗病力下降等,使这一经济鱼类的养殖效益与发展规模受到了一定的限制。为了团头鲂的良种选育和开发利用,上海市松江区水产良种场利用技术依托单位——上海水产大学农业部水产种质资源与养殖生态重点开放实验室的科研成果——团头鲂“浦江1号”于2003年7月28日建立了国家级团头鲂水产良种场。团头鲂“浦江1号”具有生长优势明… 相似文献
11.
对耐盐红螺菌科光合细菌应用于淡水斑点叉尾Hui、彭泽卿养殖后,水化学环境因子、细菌类群及养殖生物的变化进行了研究。结果表明,鱼池泼施光合细菌后,水体NH4^+-N、NO2^--N、NO3^--N和COD下降,溶氧和pH上升;细菌类群及数量变化大致是:光合细菌提高3-50倍(多数在15-20倍), 硝酸细菌提高3倍,硝酸细菌提高4-5倍;斑点叉尾Hui养殖池的主要异养细菌肠杆菌科细菌提高9.4%,气单胞菌属降低7.5%,彭泽鲫养殖池的主要异养细菌假单胞菌属降低16%,肠杆菌科提高21%;养殖生物的养殖效果是:斑点叉尾Hui鱼苗个体增重提高15.7%,彭泽卿苗个体增重提高12.8%。 相似文献
12.
哈尔滨市水产研究所于1993年5月24日从加拿大FortQu′Appelle鱼苗孵化场移运大眼狮鲈鱼发现鱼卵,经孵化后孵出鱼苗14万尾,在池塘中培育。鱼苗阶段培育36天,体长53.9mm,成活率75%;鱼种阶段经95-100天培育,套养的鱼种体长20-22.5cm,体重83-107.4g,单养的鱼种体长17.5cm,体重48.4g。 相似文献
13.
不同浓度的枯草芽孢杆菌对罗非鱼鱼苗的养殖水体水质及其抗病力的影响 总被引:10,自引:0,他引:10
罗非鱼鱼苗的养殖水体中引入不同浓度的枯草芽孢杆菌,检测水体的水质指标、鱼苗体内与免疫相关酶的酶活力、鱼苗的生长率和成活率。实验结束时,引入1.0×10^4 cfu/mL枯草芽孢杆菌实验组,氨氮和亚硝酸盐氮含量分别为2.72 mg/L、0.15 mg/L,显著低于对照组(P〈0.05);AKP活力、抗菌活力分别达249.9 U/g prot、0.59μg/mL,显著高于对照组(P〈0.05);鱼苗成活率也显著高于对照组(P〈0.05),比对照组提高了11.0%。结果显示:适合浓度的枯草芽孢杆菌能有效地改善鱼苗养殖水体的水质,提高机体免疫力和成活率。 相似文献
14.
P. Domingues R. Poirier L. Dickel E. Almansa A. Sykes J.P. Andrade 《Aquaculture International》2003,11(3):225-242
The effects of culture density on growth and survival of juvenile cuttlefish were tested. Groups of 1, 3 and 5 hatchlings were placed in small containers with bottom surface of 80 cm2, obtaining individual densities of 125, 375 and 625 cuttlefish m–2, respectively. Additionally, groups of 5 hatchlings were placed in containers with 2 different bottom areas (80 and 240 cm2), providing culture densities of 625 and 42 cuttlefish m–2, respectively. A total of 120 hatchlings were used and experiments lasted for 40 days. No differences were found in growth between any of the densities tested throughout the experiment until 35 days old. After this, cuttlefish placed in isolation grew significantly larger. A second experiment was conducted in a flow through system, using two rectangular tanks with bottom surface of 0.5 m2. Two groups of 25 cuttlefish hatchlings were used in this experiment, which lasted for 40 days. Both groups were fed live juvenile shrimp (Crangon crangon) during the first 5 days. Afterwards, one group was fed live fish fry of different species, while the other continued to be fed shrimp. After day 10 and until the end of the experiment, hatchlings fed shrimp grew significantly larger than those fed fish fry. Survival of hatchlings fed shrimp or fish fry after 40 days was of 100% and 68%, respectively. Total protein content of both prey types was similar. Therefore, the higher polar lipid content, especially due to the higher phosphatidylcholine and phosphatidylethanolamine levels observed in the shrimp, compared to fish fry could possibly be one of the major factor to explain the significantly higher growth rates for S. officinalis juveniles fed shrimp. Also, the percentage of polar lipids in the shrimp (47.4%) was closer to the one of juvenile cuttlefish (38.1%) than the composition of polar lipids in fish fry (10.4%). This could also be an important factor to explain the poor growth and survival obtained when feeding fish fry to the cuttlefish. 相似文献
15.
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
16.
以超雄鱼为父本进行遗传全雄鱼的繁育是获得全雄罗非鱼苗种的方法之一。为了评估全雄尼罗罗非鱼的养殖性能,进行了遗传全雄尼罗罗非鱼与吉富罗非鱼的池塘及网箱养殖比较试验。结果显示,初始体长3~5 cm的遗传全雄尼罗罗非鱼和吉富罗非鱼鱼苗经过100 d池塘养殖后,平均体质量分别达到558.00 g和501.80 g,遗传全雄群体的生长速度比吉富群体快11.26%;将体质量为18~19 g的遗传全雄尼罗罗非鱼和吉富罗非鱼鱼种放在同一网箱中饲养,45 d后,其平均体质量分别达到144.69 g和125.91 g,遗传全雄群体的生长速度比吉富群体快18.02%;同时,遗传全雄群体的雄性率达到了100%。对比试验结果表明,遗传全雄尼罗罗非鱼具有较高的养殖推广价值。 相似文献
17.
18.
耐盐红螺菌科细菌对淡水鱼池水质及细菌类群的影响 总被引:19,自引:4,他引:19
对耐盐红螺菌科光合细菌应用于淡水斑点叉尾Hui、彭泽卿养殖后,水化学环境因子、细菌类群及养殖生物的变化进行了研究。结果表明,鱼池泼施光合细菌后,水体NH4^ -N、NO2^--N、NO3^--N和COD下降,溶氧和pH上升;细菌类群及数量变化大致是:光合细菌提高3-50倍(多数在15-20倍), 硝酸细菌提高3倍,硝酸细菌提高4-5倍;斑点叉尾Hui养殖池的主要异养细菌肠杆菌科细菌提高9.4%,气单胞菌属降低7.5%,彭泽鲫养殖池的主要异养细菌假单胞菌属降低16%,肠杆菌科提高21%;养殖生物的养殖效果是:斑点叉尾Hui鱼苗个体增重提高15.7%,彭泽卿苗个体增重提高12.8%。 相似文献
19.
High density rearing of rohu,Labeo rohita (Hamilton) from spawn to fry in concrete tanks: effect of daily feed ration and soil base on fry growth and survival 下载免费PDF全文
Pratap Chandra Das Joykrushna Jena Babita Patro Dipti Mahanta 《Aquaculture Research》2016,47(12):3973-3979
Rearing of rohu spawn to fry size was carried out at high density (2000 spawn m?2) in large concrete nursery tanks (10 m × 5 m × 1.2 m) to standardize the daily ration of supplementary feed and to assess the impact of soil base on the fry performance. In Set‐1, supplementary feed was provided at 100% (control), 75% and 50% of the daily ration that is commonly used in earthen carp nursery ponds and named as the three treatments T‐1, T‐2 and T‐3 respectively. Although in Set‐II, performance of fry were evaluated in tanks provided with and without soil base. The fry survival was to the tune of 45–59% at this high density of 2000 spawn m?2, indicating the efficacy of the concrete nursery system for high density seed rearing. In Set‐I, T‐2 receiving 75% of the control ration exhibited similar fry growth as that of T‐1, but its fry survival (58.8%) was 10% higher than the latter. This indicated that supplementary feed in a concrete nursery can be reduced up to 25% of that provided in earthen nursery system while ensuring a higher fry yield. However, further reduction up to 50% of the control ration in T‐3 yielded lower fry survival and growth (P < 0.05) revealing inadequacy of the available feed. In Set‐II, treatment without soil base (T‐ns) yielded similar fry growth but 10% higher survival compared to that with the soil base (T‐s) revealing non‐essentiality of soil base in concrete tanks for such short‐term nursery rearing of rohu. 相似文献