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1.
2种淡水蚌类对水环境中Cu、Zn和Cd的去除与累积 总被引：5，自引：0，他引：5
2007年10月,在室内模拟条件下初步研究了成年背角无齿蚌和三角帆蚌对水环境中的Cu、zn和cd的去除与累积.随着暴露时间的延长,2种淡水蚌在不同重金属浓度处理下.对水体中Cu、Zn、Cd的去除率均呈下降趋势.相同重金属浓度处理下,背角无齿蚌对水体中Cu、Zn、Cd的去除率分别为三角帆蚌的1.2、1.9、1.5倍.统计分析结果表明,淡水蚌种类、重金属浓度、蚌不同组织对其体内Cu、Zn、cd含量的影响均存在显著效应(P<0.05).2种淡水蚌各组织对Cu、Zn、Cd的富集系数平均值均随处理中重金属浓度的增加而下降,且不同浓度处理下淡水蚌鳃对Cu、Zn,Cd的富集系数平均值远高于足、外套、壳. 相似文献
2.
淡水蚌类繁殖生物学研究进展 总被引：10，自引：1，他引：10
淡水蚌类指瓣鳃纠（双先纠）蚌科[Unionidae（Bivalvia）]的贝类，全世界现有168个属，1000多种，其中珠蚌属（Margaritifera）是亚洲、欧洲和美洲大陆都有分布的淡水珍珠贝。我国已经发现的蚌科也有15属140余种。它们分布于江河、湖泊、沟渠、池塘中。其中作为培育珍珠和制作珠核用的帆蚌、丽蚌等淡水贝类具有较高的经济价值。 相似文献
3.
池蝶蚌和我国的三角帆蚌为同属不同种,出产于日本滋贺县的琵琶湖.池蝶蚌是的优质淡水育珠蚌,具有以下特点:①容易养殖,池蝶蚌的生活习性与三角帆蚌非常相近,其繁殖、幼蚌培育、成蚌饲养技术也与三角帆蚌相似;②成活率高,池蝶蚌内脏团大,软体部分的重量占蚌体总重量的比例达45%,体质好,生命力强;③手术插核难度小,池蝶蚌双壳鼓起,壳间距大,且闭壳肌也强壮,其直径比三角帆蚌大20%,开壳宽度可超过1 cm,有利于手术操作;④育珠品质高,珍珠光亮度、珠层厚度以及品质都比其它淡水蚌手术蚌的珍珠要好;⑤贝壳利用价值高,池蝶蚌的贝壳比三角帆蚌的贝壳厚50%以上,尤其是贝壳的珍珠层较厚,有利于加工珍珠层粉,也是制作珠核、雕刻的最佳材料.目前,池蝶蚌在江西省被广泛推广养殖,在该省临川、都昌、万年、泰和等县市建立起示范推广基地2000多亩,直接参与池蝶蚌养殖的农户达1500多户,取得了丰厚的经济效益.笔者通过实地走访调查,查阅相关资料并结合多年蚌类养殖研究,对池蝶蚌的人工繁育技术总结如下: 相似文献
4.
褶纹冠蚌俗称鸡冠蚌、湖蚌、绵蚌和水蚌等,主要生活在硬底或泥沙底的河流、湖泊、沟渠等较肥的水域水域中,耐污水和低氧能力较强,分布广泛。褶纹冠蚌壳质较厚,壳面为黄褐色、黑褐色或淡青绿色。壳内面珍珠层呈乳白色、鲑白色、淡蓝色或七彩色。每年3—4月和10—11月有2次繁殖季节。 相似文献
5.
<正>背角无齿蚌(Anodonta woodiana woodiana)隶属软体动物门、双壳纲、蚌科、无齿蚌属,俗称菜蚌、河蚌、湖蚌、蚌壳、无齿蚌、圆蚌等,广泛分布于我国各省的江河、湖泊、水库、沟渠及池塘中。背角无齿蚌产量较高,是我国常用的淡水育珠蚌之一,具有较好的经济价值。近年来贝类自然资源不断减少,遗传多样性被破坏,而精子超低温冷冻保存技术能为珍稀物种和重要经济种类基因资源的长期保存提供有效技术手段,在繁殖生物学、遗传育种和种质资源保护等方面具有重要意义,尤其可作为克服因繁殖 相似文献
6.
<正> 三角帆蚌(Hyriopsis cumingii)是当前淡水蚌珠生产中最佳的蚌种,一直为育珠者广泛采用。但是,自1975年以来,多数育珠地区,经插珠和未插珠的三角帆蚌均常因发病而导致大批死亡,造成重大损失。生产单位被迫改用褶纹冠蚌(Cristaria plicata)育珠,但珍珠质量不如三角帆蚌的好。因此,防治流行广,危害大的三角帆蚌病的问题,已成为亟待解决的问题。 相似文献
7.
选用黄颡鱼(Pelteobagrus fulvidraco)作为寄主鱼,研究了背瘤丽蚌(Lamprotula leai)钩介幼虫寄生变态发育的过程、生物学零度和有效积温等重要生物学特征。结果显示,背瘤丽蚌钩介幼虫在黄颡鱼的鳃丝、鳍条或须上均能完成变态发育。在水温(25±1)℃时,寄生期为8 d。钩介幼虫腹缘先与寄主鱼体表组织接触,寄生后5 h,大部分被鱼体组织包裹;第2天,内幼虫足丝消失,钩介幼虫全部被包在包囊中;随着钩介幼虫寄生变态发育的进行,其壳颜色逐渐加深;第7天,变成黑色不透明,并有少量钩介幼虫变态为稚蚌;第8天,稚蚌脱落达到高峰期;第9天,稚蚌全部脱落。在寄生阶段,钩介幼虫壳长、壳高和铰合部长未发生显著变化。钩介幼虫寄生变态发育的生物学零度为12.8℃,有效积温为100.2℃.d。 相似文献
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9.
是一种小型的杂食性淡水鱼类，在全国各个水系皆有分布。在养蚌水域里，不仅与珠蚌争食，消耗水体溶氧，而且它的这种必须通过受精卵寄生于贝类鳃瓣上繁衍后代的繁殖习性，大大影响了蚌体的呼吸，导致蚌体体质下降，极易间接引发或加重蚌病，甚至直接造成珠蚌死亡，严重影响育珠生产。２００１年４～９月份，对来自金华、兰溪等区市蚌病门诊病例２５７个，其中对１４个有鱼卵寄生的１００多只病蚌样品进行解剖化验。从病例统计结果显示：４～９月是的繁殖季节。因此，珍珠蚌的整个生长期几乎都会受鱼卵寄生，其中５～７月为高峰期。通过解剖… 相似文献
10.
我国有淡水蚌100多种,但适合养殖珍珠的蚌仅有三角帆蚌、褶纹冠蚌、无齿蚌。目前生产上用得最广、养殖珍珠价值最高的河蚌为三角帆蚌和褶纹冠蚌。一、淡水珍珠蚌的生态、生活习性（－）生活习世珍珠蚌一般生活于江河、湖泊、池塘等水体的底泥中,蚌体潜入泥中的深度随季节变化而不同。冬季水温低时,蚌体大部分潜入泥沙中,前腹缘向下,背缘向上,仅露出壳后缘部分呼吸摄食。夏季则大部分露在泥沙外。不同种类的蚌对环境的要求不同,如把纹冠蚌喜栖息于水流缓慢或静水的泥沙中,喜肥水,适宜pH为5－7;三角帆蚌喜栖息在流水的沙质底泥中,… 相似文献
11.
Freshwater prawns, particularly, the Giant Freshwater prawn Macrobrachium rosenbergii, are one of the most economically important farmed species in the world. Faced with increasing disease problems in penaeid shrimp culture, farmers turned to freshwater prawn farming. Freshwater prawns were considered relatively less susceptible to diseases. However, with intensification of culture and increased world trade of the farmed species, emerging diseases are beginning to constitute an increasingly serious health problem in freshwater prawn culture. This article is a review of the important diseases reported in freshwater prawns, with particular emphasis on the white tail disease of M. rosenbergii as it is the most important disease recorded to date and also the most well studied among the diseases of freshwater prawns. Steps to be taken for proper health management in the farming of this species is also touched upon. 相似文献
12.
Michael O Frinsko 《Aquaculture Research》2012,43(7):1056-1063
Freshwater prawn Macrobrachium rosenbergii aquaculture continues to expand in the United States though is still a relatively small industry. Innovations continue to improve efforts in harvesting with novel harvest basin designs and concrete internal pond aprons. Purging and holding strategies are more defined. Some producers are now investing in water re‐use systems to extend holding times for many days, making prawns more readily available for market. The lucrative live‐market, which historically has had many challenges, seems poised for success when following new protocols which address handling and oxygen stress. 相似文献
13.
《水产资源保护:海洋与淡水生态系统》2002,12(5):577-577
The original article to which this Erratum refers was published in Aquatic Conservation: Marine and Freshwater Ecosystems 11(6) 2001, 437–451. 相似文献
14.
《水产资源保护:海洋与淡水生态系统》2002,12(2):251-251
The original article to which this Erratum refers was published in Aquatic Conservation: Marine and Freshwater Ecosystems 11(6) 2001, 453–471. 相似文献
15.
《Aquaculture Research》1980,11(3):141-144
Book reviewed in this articles:
Advances in Aquaculture Edited by: T. V. R. PILLAY and W. A. DILL.
The Complete Freshwater Fishes of the British Isles By JONATHAN NEWDICK. A. & C.
A Key to the British Freshwater Leeches J. M. ELLIOTT and K. H. MANN.
Reservoirs By BRIAN HENDERSON-SELLERS.
Trout By ERNEST SCHWIEBERT 相似文献
Advances in Aquaculture Edited by: T. V. R. PILLAY and W. A. DILL.
The Complete Freshwater Fishes of the British Isles By JONATHAN NEWDICK. A. & C.
A Key to the British Freshwater Leeches J. M. ELLIOTT and K. H. MANN.
Reservoirs By BRIAN HENDERSON-SELLERS.
Trout By ERNEST SCHWIEBERT 相似文献
16.
《Aquaculture Research》1986,17(1):111-112
Book reviewed in this article:
Concepts in Marine Pollution Measurements . Edited by H. H. W hite .
Fish Energetics — New Perspectives . Edited by P. T ytler and P. C alow .
Freshwater Crayfish V. Papers from the Fifth International Symposiiun on Freshwater Crayfish, University of Davis, California, 1981 . Edited by C harles R. G oldman . 相似文献
Concepts in Marine Pollution Measurements . Edited by H. H. W hite .
Fish Energetics — New Perspectives . Edited by P. T ytler and P. C alow .
Freshwater Crayfish V. Papers from the Fifth International Symposiiun on Freshwater Crayfish, University of Davis, California, 1981 . Edited by C harles R. G oldman . 相似文献
17.
淡水渔业在福建省渔业中占据重要的地位也具有较大的空间。淡水渔业的发展必须依靠淡水渔业科技的先行发展。为此,本文首先介绍福建省淡水渔业的现状;其次,阐述了发展淡水渔业科技首先要解决的几个认识上的问题;最后提出发展我省淡水渔业对本学科提出的几点要求和未来学科发展的几个重点领域,希望本文对淡水渔业科技的发展具有借鉴意义。 相似文献
18.
Sea lice are significant parasites of marine and brackish farmed fishes. Freshwater bathing is a potential control option against numerous sea lice species, although has been viewed as futile against those that are capable of tolerating freshwater for extended periods. By comparing freshwater survival times across host‐attached stages of Lepeophtheirus salmonis (Krøyer), a key parasite in Atlantic salmon farming, we show the first attached (copepodid) stage undergoes 96–100% mortality after 1 h in freshwater, whereas later attached stages can tolerate up to 8 days. Thus, regular freshwater bathing methods targeting the more susceptible attached copepodid stage may successfully treat against L. salmonis and potentially other sea lice on fish cultured in marine and brackish waters. 相似文献
19.
《Aquaculture Research》1986,17(2):163-165
Book reviewed in this article:
Artificial Reefs, Marine and Freshwater Applications . Edited by F rank M. D'I tri .
The Fishing Culture of the Worid . Edited by B. G unda .
Seafarer's Guide to Marine Life . By P aul H orsman .
Freshwater Fish of Britain, Ireland and Europe . By R. P hillips & M. R ix .
The Lammas Drave and the Winter Herrin': a History of the Herring Fishing from East Fife . By P eter S mith . 相似文献
Artificial Reefs, Marine and Freshwater Applications . Edited by F rank M. D'I tri .
The Fishing Culture of the Worid . Edited by B. G unda .
Seafarer's Guide to Marine Life . By P aul H orsman .
Freshwater Fish of Britain, Ireland and Europe . By R. P hillips & M. R ix .
The Lammas Drave and the Winter Herrin': a History of the Herring Fishing from East Fife . By P eter S mith . 相似文献
20.