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1.
乌鳢又名黑鱼,是肉食性凶猛鱼类,过去在养殖上常把它当作捕杀对象。随着渔业生产的发展,对肉食性鱼类养殖已经开始重视。乌鳢肉味鲜美,营养丰富,经济价值高,是很有发展前途的养殖鱼类。乌鳢喜欢栖息于水草丛生地带,冬季常钻入上中停食越冬。乌鳢除鳃呼吸外,还有一辅助呼吸器,直接利用空气中的氧气,所以,乌鳢在出水后可较长时间不死。初夏是乌鳢摄食最旺季节,一斤多重的个体可吞食二、三两大小的鱼,池塘放养乌鳢,应当小于其它养殖鱼类。  相似文献   

2.
乌鳢(Opbiocepbalus argus Cantor)俗名乌鱼、生鱼、斑鱼等。乌鳢原为野生鱼类,由于它肉味鲜美,营养丰富,能滋补身体,经济价值较高,在国内外市场甚为畅销。过去,乌鳢是作为养殖害鱼加以捕杀的,随着人民生活和外贸出口的需要,近年来各地已把乌鳢作为池塘和外荡放养中多品种混养的一个重要鱼种。因而,乌鳢苗的大量供应已被提到议事日程。  相似文献   

3.
研究了太湖乌鳢的生长与食性,探讨了乌鳢在太湖渔业中的生态地位,并对其渔业现状进行了评价。作者认为,乌鳢对太湖经济鱼类危害不大,且能抑制野杂鱼的过渡繁殖,因而提出了保护和增殖乌鳢的措施。  相似文献   

4.
乌鳢俗称才鱼、黑鱼,是一种以小型鱼类为食物的经济价值,营养价值和医学价值均较高的淡水名贵鱼类.2006年9月至2007年6月,笔者在江西省余干县益人公司乌鳢规模化繁育基地采取池塘中设置网箱,利用网箱进行乌鳢规模化人工繁殖技术实验研究,摸索出一套实用可行的乌鳢规模化人工繁殖技术模式,取得了预期的效果.  相似文献   

5.
养殖乌鳢新病害——诺卡氏菌病   总被引:4,自引:0,他引:4  
乌鳢(Channa argus)是我国广泛分布的肉食性淡水名贵鱼类,其经济价值和营养价值都很高。乌鳢生命力很强,但是随着养殖规模的扩大,乌鳢病害时有发生,给养殖生产造成了较大的经济损失。  相似文献   

6.
乌鳢Ophiocephalus argus(Cantoy)又名黑鱼,是一种凶猛肉食性名贵经济鱼类.肉味鲜美,营养丰富,还有去瘀生肌、滋养补血等药理作用,在国内外市场上甚为畅销.由于过去乌鳢视为养殖的害鱼而被捕杀,致使天然资源日趋减少.近年来乌鳢作为一种名特优养殖品种,深受渔农欢迎.为了开发利用和增殖乌鳢资源,于1998~1999年在本县乐丰镇十字河分场进行了池塘人工养殖乌鳢的试验,现将试验情况报告如下.……  相似文献   

7.
乌鳢肌肉营养成分分析   总被引:46,自引:1,他引:45  
本文分析了乌鳢肌肉常规营养成分 (蛋白质、脂肪、水分、灰分、钙和磷 )的含量。同时对其蛋白质的17种氨基酸和肌肉中的主要微量元素铁、铜、锰、锌进行了测定。通过与其它鱼类营养成分的比较 ,表明乌鳢是一种营养价值较高的经济鱼类。  相似文献   

8.
乌鳢(Ophiocephalus argus)俗称生鱼、黑鱼,乌棒、斑鱼、蛇头鱼、孝鱼、墨头鱼等。乌鳢属硬骨鱼纲、鲈形目、攀鲈亚目、鳢科、鳢属。目前我国养殖的主要品种有乌鳢(两湖生鱼)、斑鳢(两广生鱼)及其杂交种。乌鳢是鳢科鱼类中个体大、生长快、产量和经济价值较高的名贵经济鱼类。其肉质细腻,肉味鲜美,刺少肉多,生长较快。  相似文献   

9.
乌鳢俗称黑鱼、才鱼、生鱼、蛇头鱼等,营养丰富,肉质细嫩,且生长快,个体大,是一种经济价值很高的淡水鱼类。由于乌鳢有捕食其它鱼类的习性,过去一直将其视为敌害,在池塘养鱼中作为清除的对象加以捕杀。近年来随着我国经济迅速发展,人民群众的生活水平不断提高及对外贸易事业的发展,对乌鳢的需求量也越来越大,而野生资源严重衰退,天然产量下降,  相似文献   

10.
孙习能  刘金明 《内陆水产》2004,29(10):10-10
乌鳢(channa argus),又称黑鱼、才鱼、乌鱼、黑鱼棒子等,隶属鳢形目、鳢科,是鳢科鱼类中个体大。生长快,经济价值高的淡水名贵经济鱼类。近年来,乌鳢在市场上深受消费者的喜爱。促使乌鳢养殖在黄河三角洲地区得以迅速发展。结合我市水库资源丰富的实际。东营市渔业技术推广站于2002年8月~2003年3月.在胜利石油管理局东安水库进行网箱培育乌鳢苗种试验,获得了成功,取得了很好的社会效益与经济效益。  相似文献   

11.
采用主成分分析方法评价泥鳅Misgurnus anguillicaudatus、黄鳝Monopterus albus、鲫Carassius auratus、鲤Cyprinus carpio、乌鳢Channa argus、黄颡鱼Pelteobagrus fulvidraco,和虹鳟Oncorhynchus mykiss等7种常见食用鱼的食用品质价值,对其17种氨基酸进行综合评价。通过建立鱼类食用品质评价模型,构造综合评价函数计算综合得分并排序,来反映该种鱼类的食用品质。结果显示:虹鳟综合得分最高,其次是鲫,而黄颡鱼排在最末。通过主成分分析模型建立可量化的评价指标和新的评价方法,为鱼类营养价值评价提供更为准确、客观的方法。  相似文献   

12.
基于鱼类食性的白洋淀食物网研究   总被引:1,自引:0,他引:1  
2009年6月至2010年5月,对白洋淀8个典型采样点进行了调查,分析了白洋淀鱼类的食性、营养级和食物网特征,绘制了鱼类食物网及能量流动途径。结果显示,白洋淀现有鱼类25种,其食性类型分为草食性、浮游生物食性、底栖生物食性、游泳动物食性、浮游生物+底栖生物、底栖生物和游泳动物食性共6种;白洋淀的鱼类营养级可分为草食性、杂食性、低级肉食性、中级肉食性和高级肉食性共5种。与历史资料相比,白洋淀鱼类食物网趋于简单,中级肉食性鱼类匮乏,能量流动出现越级现象,食物网结构不完整,说明其渔业资源遭受严重破坏。  相似文献   

13.
为了解冰鲜鱼和水产配合饲料2种不同饲料对乌鳢(Ophiocephalus argus)中汞和甲基汞富集水平和食用安全的影响,实验采用ICP-MS法、液相-原子荧光分光光度法分别测定乌鳢在摄食冰鲜鱼和水产配合饲料两种不同饲料后,研究其肌肉、肝脏和肾脏3种不同组织中总汞和甲基汞的含量随养殖周期的富集规律。结果显示:在整个养殖过程中,饲料投喂组肌肉、肝脏和肾脏中总汞和甲基汞含量均低于冰鲜鱼投喂组,其中冰鲜鱼组肌肉、肝脏中总汞和甲基汞的富集均明显高于饲料组,肾脏中总汞的富集明显高于饲料组。从不同组织看,肌肉对总汞和甲基汞的富集显著高于肝脏和肾脏。肌肉中汞主要以甲基汞形式存在,平均含量占总汞的84.2%,低于国家食品安全限量标准,食用风险较低。相关性分析显示,2种不同饲料中总汞、甲基汞含量对乌鳢生长周期内总汞、甲基汞富集无显著性影响。结果表明乌鳢配合饲料养殖较冰鲜鱼养殖更为安全,适宜进一步推广运用。  相似文献   

14.
Abstract –  Rates of annual food consumption and biomass were modeled for several fish species across representative rivers and lakes in eastern North America. Results were combined to assess the relative potential of fish predation to impact zebra mussels ( Dreissena polymorpha ). Predicted annual food consumption by fishes in southern waters was over 100% greater than that in northern systems because of warmer annual water temperatures and presumed increases in metabolic demand. Although generally increasing with latitude, biomasses of several key zebra mussel fish predators did not change significantly across latitudes. Biomasses of some less abundant fish predators did increase significantly with latitude, but increases were not of the magnitude to offset predicted decreases in food consumption. Our results generally support the premise that fishes in rivers and lakes of the southern United States (U.S.) have inherently greater potential to impact zebra mussels by predation. Our simulations may provide a partial explanation of why zebra mussel invasions have not been as rapid and widespread in southern U.S. waters compared to the Great Lakes region.  相似文献   

15.
Introduced fishes may have major impacts on community structure and ecosystem function due to competitive and predatory interactions with native species. For example, introduced lake trout (Salvelinus namaycush) has been shown to replace native salmonids and induce major trophic cascades in some North American lakes, but few studies have investigated trophic interactions between lake trout and closely related native Arctic charr (S. alpinus) outside the natural distribution of the former species. We used stomach content and stable isotope analyses to investigate trophic interactions between introduced lake trout and native Arctic charr in large subarctic Lake Inarijärvi in northern Finland. Both salmonids had predominantly piscivorous diets at >280 mm total length and were mainly caught from the deep profundal zone. However, lake trout had a more generalist diet and showed higher reliance on littoral prey fish than Arctic charr, whose diet consisted mainly of pelagic planktivorous coregonids. According to length at age and condition data, lake trout showed slightly faster growth but lower condition than Arctic charr. The results indicate that introduced lake trout may to some extent compete with and prey upon native Arctic charr, but currently have only a minor if any impact on native fishes and food web structure in Inarijärvi. Future monitoring is essential to observe potential changes in trophic interactions between lake trout and Arctic charr in Inarijärvi, as well as in other European lakes where the two salmonids currently coexist.  相似文献   

16.
长荡湖水生植被动态及其渔业效应的研究   总被引:11,自引:0,他引:11  
朱清顺 《水产学报》1989,13(1):24-35
本文根据1983年—1984年调查研究结果分析整理而成。文中论述了长荡湖现有水生植被的种类组成,群落结构,生态分布,沉水植物的生物量及其利用。经过分析比较,发现近30年来,长荡湖水生植被经历了旺盛—衰竭—恢复—旺盛的演替过程,揭示了引起植被变化的各种因素。随着水生植被的动态变化,长荡湖的鱼类种群结构,渔获对象及捕捞工具都相应发生了变化。植被的盛衰同浮游植物和浮游动物、底栖生物的消长丰歉有着密切的关系.本文最后指出了长荡湖水植被的演替趋势和潜在危机,强调了合理利用和定向改造水生植被的重要性,并对今后如何发展我国湖泊渔业提出了建议。  相似文献   

17.
Abstract – Bull trout, a species of char listed as threatened under the US Endangered Species Act, have been displaced from portions of their historic range following the introduction of nonnative lake trout. It has been suggested that competitive exclusion as a result of trophic overlap between bull trout and lake trout may be the causal mechanism associated with displacement of bull trout. This study used stable isotope data to evaluate trophic relationships among native bull trout, nonnative lake trout and other fishes in seven lakes in Glacier National Park (GNP), Montana. Bull trout and lake trout had greater δ15N values relative to other fishes among lakes (δ15N ≥ 3.0‰). Lake trout had greater δ15N values relative to bull trout (δ15N = +1.0‰). Bull trout had greater δ13C values relative to lake trout in six of the seven lakes examined. Although both bull trout and lake trout had greater δ15N values relative to other fishes within lakes in GNP, differences in δ15N and δ13C between bull trout and lake trout suggest that they are consuming different prey species or similar prey species in different proportions. Therefore, displacement of bull trout as a direct result of complete overlap in food resource use is not anticipated unless diet shifts occur or food resources become limiting. Additionally, future studies should evaluate food habits to identify important prey species and sources of partial dietary overlap between bull trout and lake trout.  相似文献   

18.
The chief predatory fishes found in shrimp culture ponds in Thailand are Tilapia mossambica, Lates calcarifer, Scatophagus argus, Eluetheronema tetradactylum, Goviupterus chuno, Mystus sp., and other gobies. The eradication of predators, mostly fishes, is necessary for good management of any shrimp farm. Tea seed grown in northern Thailand has been used for this purpose. Quantitative analysis of crude saponin in the tea seed was conducted and some biological tests on the toxicity of crude saponin to fish were performed.The effective dosage of crude saponin for the eradication of predatory fishes was 1.1 ppm, but shrimp, crabs, copepoda, rotifers and brine shrimp (Crustacea) all survived this concentration. The lethal time for fishes increased in proportion to their body weight and the salinity of the pond. The toxicity of the saponin weakened with time.  相似文献   

19.
Diadromous fishes are known biotransport vectors that can move nutrients, energy and contaminants in an upstream direction in lotic ecosystems. This function has been demonstrated repeatedly in anadromous salmonids, but the role of other diadromous species, especially tropical taxa, as biotransport vectors is less studied. Amphidromous fish species exhibit potential to act as upstream vectors of nutrients and contaminants in their postlarval and juvenile stages, but this role is largely unknown because of limited understanding of larval growth habitats. Moreover, because some species are harvested in artisanal fisheries as postlarvae, and postlarvae are consumed by riverine and estuarine predators, heavy contaminant loads may present a human or wildlife health concern. This research incorporates stable isotope and contaminant analyses to infer larval habitats and contaminant accumulation of amphidromous fishes on the Caribbean island of Puerto Rico. The isotopic signatures of postlarval amphidromous fishes indicated marine basal sources and food web components, rather than those from riverine habitats. Additionally, postlarvae did not contain concentrations of anthropogenic pollutants that would be of ecological or human health concern. These findings are the first and strongest evidence that amphidromous fish postlarvae function as biotransport vectors of marine nutrients into and up river ecosystems without posing a health threat to the receiving food web or human consumers.  相似文献   

20.
福建省沙溪鱼类群落结构研究   总被引:2,自引:0,他引:2  
根据2007-2008年沙溪鱼类资源调查资料,分析了沙溪鱼类种类组成,优势种、常见种及其季节变化,生态类型等群落结构。本次调查共捕获鱼类59种,隶属于6目15科30属。采用Pinkas的IRI指数分析沙溪鱼类群落季节变化,结果表明:沙溪优势种季节变化不大,以鲤鱼、鲴类、黄颡鱼为主,常见种略有季节变化。沙溪鱼类生态类型多样,以底层、杂食性、适应静水生活鱼类为主。与30年前相比,沙溪河肉食性鱼类、底层鱼类、适应流水鱼类种类数都有较为明显的下降,杂食性鱼类、耐氧性鱼类、适应缓流或静水生活的鱼类则有上升趋势。  相似文献   

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