共查询到20条相似文献，搜索用时 62 毫秒
1.
中华倒刺鲃人工繁殖试验 总被引：1，自引：0，他引：1
中华倒刺鱼巴Ｂａｒｂｏｄｅｓ (Ｓｐｉｎｉｂａｒｂｕｓ)ｓｉｎｅｎｓｉｓ (Ｂｌｅｅｋ ｅｒ) ,地方名青波、青板、乌鳞 ,以肉质细嫩、肉味鲜美为人们所喜食 ,具有生长快、个体大、食性广、耐低氧、抗病力强、经济效益高等特点 ,深受养殖户的青睐。近年来 ,由于江河野生资源日益枯竭 ,市价居高不下 ,一些养殖单位都竞相饲养 ,但种苗的数量受到限制 ,仅从江河捕捞的鱼苗根本不能满足成鱼规模养殖所需。开展中华倒刺鱼巴的人工繁殖 ,对渔业生产的发展具有重要的现实意义。1 中华倒刺鱼巴繁殖生物学在自然水体中 ,4～ 8月是中华倒刺鱼巴的产… 相似文献
2.
静水湖泊网箱培育中华倒刺鲃鱼种试验 总被引：2，自引：1，他引：1
中华倒刺鱼巴 (Ｓｐｉｎｉｂａｒｂｕｓｓｉｎｅｎｓｉｓ (Ｂｌｅｅｋｅｒ)。俗名青波 ,隶属鲤科、鱼巴亚科、四须鱼巴属、倒刺鱼巴亚属、多生活于长江及其附属水体等江河上游 ,其肉味鲜美、生长快、抗病力强 ,饵料容易解决 ,深受广大消费者及生产者的青睐。本试验旨在探索静水湖泊养殖倒刺鱼巴这一养殖模式 ,为中华倒刺鱼巴的养殖开辟一条新途径。试验在四川省三台县鲁班湖进行 ,该湖为四川省人民渠七期工程 (隶属都江堰灌区 )修建的大型囤蓄水库 ,常年养殖水面 14 0 0 0余亩 ,平均水深 30余米 ,水流速趋近于零 ,为静水型湖泊。1 材料与方… 相似文献
3.
中华倒刺鱼巴是近年来新兴的养殖鱼类,具有肉质细嫩,味道鲜美,个体较大等优点,深受消费者喜爱。目前,中华倒刺鱼巴成鱼批发价稳定在60元/千克。为了探索中华倒刺鱼巴鱼种培育的新途径,笔者于2002年进行了2只网箱培育中华倒刺鱼巴鱼种试验,现总结如下。1方法1.1网箱设置网箱2只(原用于草鱼成鱼养殖),每只规格为6米×4米×2米,网目1厘米。网箱四周用油桶作浮子,油桶上方用角钢焊成支架,箱体四周及底层还用直径为6厘米钢筋焊成外框,以防外力冲撞。选择水深3米以上,水流速度0.10～0.15米/秒,背风,避洪,溶氧丰富河段放箱。网箱下水深度为1.5米,网… 相似文献
4.
光倒刺鲃池塘主养的技术要点 总被引：1，自引：0，他引：1
光倒刺鱼巴原为江河野生经济鱼类 ,具有肉味鲜美、生长快、食性杂、病害少等许多优良性状 ,其养殖是目前淡水鱼类养殖中效益较高的 ,因此 ,南方一些省市兴起光倒刺鱼巴养殖 ,但由于对该鱼养殖技术的报道相对较少 ,群众养殖缺乏养殖技术的支撑 ,故效果参差不齐 ,养殖失败的例子也时有发生。我们从事光倒刺鱼巴的繁殖、养殖研究十余年 ,现将光倒刺鱼巴养殖应注意的一些问题总结如下 ,以促进光倒刺鱼巴养殖的发展。1 池塘条件光倒刺鱼巴性活泼 ,喜欢清新、有流动水的生态环境 ,因此其养殖鱼池 ,应选择阳光足、水源好、水质清新无污染、排灌方… 相似文献
5.
中华倒刺鱼巴地方名青波、青板、乌鳞,属鲤科,鱼白亚科鱼类。主要分布在长江中游的干、支流中,其个体大、生长快、食性广、耐低氧、抗病力强,喜欢生活在流水环境中,它以其肉质细嫩、味鲜美、营养丰富深得人们喜爱。2003年我们根据中华倒刺鱼巴的习性,结合本地区的气温,进行了网箱养殖中华倒刺鱼巴的试验,取得了显著的经济效益。现将试验情况报告如下。1材料与方法1.1网箱的结构与设置网箱为5m×4m×2.5m的双层结构,内层为无结聚乙烯网,四周网目1.5cm,底层网目0.8cm。外层为3×3聚乙烯保护箱,网目为3cm。网箱设置于黎城湖上游,避开主河道,设… 相似文献
6.
倒刺鱼巴是溪河野生的名优鱼类之一,它具有食性杂、生长快、个体较大(最大个体可达25千克)、肉嫩味美、营养丰富(每100克肉含量蛋白质17.3克,脂肪5.1克,钙、磷、铁的含量也较高)、繁殖力高、抗病力强、市场价格高等优点,同时经过人工驯化后可摄食人工配合饲料,适合于池塘、湖泊、水库、集约化、规模化的人工养殖。近年来由于过度捕捞,水体污染严重,野生资源日益枯竭,因而人工养殖倒刺鱼巴市场前景看好。山区大力发展人工养殖倒刺鱼巴,既优化池塘养殖品种结构,又提高经济效益,具有良好的推广前景。但倒刺鱼巴目前人工繁殖技术还不稳定,苗种大… 相似文献
7.
8.
雌性光倒刺鲃性腺成熟度的外部感观鉴别 总被引：4，自引：0，他引：4
光倒刺鱼巴 (SpinibarbushollandiOshima)原为江河野生鱼类 ,自上世纪九十年代我所突破人工繁殖技术以来 ,改变了过去仅靠捕捞江河野生苗种养殖的局面。随着光倒刺鱼巴养殖的发展以及江河光倒刺鱼巴资源的日益枯竭 ,养殖苗种的来源将越来越依赖于人工繁殖。由于光倒刺鱼巴繁殖生物学、形态学及解剖学方面的特殊性 ,制约其人工繁育大规模的生产。近年 ,我们就其性腺成熟度外部感观特征与繁殖效果的关系进行了实验性的探讨 ,以求有效的指导生产 ,提高人工繁殖过程中亲鱼成熟度鉴别的准确性。1 性腺成熟度外观鉴别目前对淡水鱼类 (“家鱼”)… 相似文献
9.
为了加大渔业资源的开发力度,发展名优鱼类的养殖,调整养殖品种,2003、2004年我们进行了倒刺鱼巴驯养,并取得了一定的生产经验,现将养殖情况报告如下:1倒刺鱼巴的生物学特性倒刺鱼巴(Spinibarbusdenticulatus)又名青竹鲤、竹柏鲤,俗名君鱼,是珠江水系著名的优质经济鱼类。分类上属于鲤科、鱼巴亚科、倒刺鱼巴属。因其背鳍短小,前方具有一根向前卧伏于皮下的硬刺,而得名。体背部青灰色,腹部灰白色,各鳍均为淡桔红色,背鳍和臀鳍边缘黑色,体侧绝大部分鳞片基部有一黑斑。属中下层鱼类,主要生活在流水的江段或水库上游河段,喜安静且栖息于乱石… 相似文献
10.
11.
An analysis of the food of 274 specimens of Tilapia aurea (Steindachner), which had been collected in Lake Kinneret, showed that this species is mainly a zooplankton consumer.A study of the quantitative dynamics of the food components in the course of a year has proved that the species in question feeds more intensely in spring, this being the time when zooplankton forms are more abundant in the water of the lake. Vegetable detritus, mixed with plankton and benthos forms, served as additional and alternative food.The lack of clearly positive degree of food component selectivity, as well as the low values of the intestine repletion index and of the condition coefficient, account for the slowness in growth of Tilapia aurea in Lake Kinneret.The low values of the growth and feeding indices are due, according to the authors, to the pressure brought to bear by the other local fish species, which are competitors for the same food. 相似文献
12.
Pepietta Spataru 《Aquaculture (Amsterdam, Netherlands)》1978,14(4):327-338
Analysis of the gut content of 329 specimens of T. zillii (Cichlidae) collected from Lake Kinneret, has shown great variation in the sorts of food.A study of seasonal dynamics has proved the prevalence in the food of Chironomida pupae (Diptera) in winter and spring and of zooplankton forms in summer and autumn. The additional food consisted of the various groups of algae, the most frequently found being Cyanophyta (100%) and Pyrrophyta (64.16%). An extremely voraceous species, it consumes — while searching for its preferred food — anything that comes its way in the water: algae, scraps of macrophytes, autochthonous and allochthonous insects, and forms of benthic origin, such as Nematoda, Ostracoda, Porifera and Chironomida (larvae).The satiation index is high (between 4.08 and 5.63), in contradiction to the low values of the coefficient of condition (between 3.05 and 3.51), and with the slow rate of growth in Lake Kinneret. The main food of Tilapia zillii, consists of arthropod species with a chitin content (which is eliminated unchanged) of more than 50% of the total weight, and this may account for the poor exploitation of the trophic base.This species of fish may be considered as being detrimental to others (i.e. commercially important species) because of its successful competition for food, and not, as is often incorrectly assumed, because it is an aggressive consumer of their spawn and fry. 相似文献
13.
14.
不同品系尼罗罗非鱼致死低温的研究 总被引：25，自引：1，他引：25
在室内自然降温条件下，研究了三个品系尼罗罗非鱼（吉富品系，“７８”品系，“８８”品系）对低温的耐受力，计算得出每个品系的半致死低温，并对降温过程中尼罗罗非鱼行为活动的变化进行了观察。试验结果表明，在上海地区，当温度降低到１１℃时，罗非鱼开始死亡，到７．４℃时，全部死亡。吉富罗非鱼死亡温度范围是１１℃￣８．４℃，“７８”品系是９．８￣７．４℃，“８８”品系是１１℃￣７．４℃。对三个品系半致死低温的研 相似文献
15.
Irena Pípalová 《Aquaculture International》2003,11(4):325-336
The aims of this experiment were (1) toquantify the ability of grass carp to processduckweed and (2) to assess indirect changes inwater chemistry and phytoplankton community,caused by grass carp feeding. Yearling grass carp sized 126 ± 7.7 mm (TL) and19.6 g in weight were kept in 9 laminate tanksof 1 m3 for 14 days. Two stockingdensities (2 and 6 fish per m3) anda control without fish were used. Standard growthrate (SGR) of grass carp fed exclusively onduckweed was 0.70% body weight (BW) d–1and food conversion ratio (FCR) reached 2.0(average water temperature =21.1 ± 3.8 °C). Daily food intakewas 0.2 g of duckweed dry weight (DW), i.e.,1% of average BW of grass carp. SGR ofduckweed growing in 20 × 20 cm floatingenclosures, differed significantly[F(6,2) = 417.9; p = 0.002] between the twostocking densities of grass carp and thecontrol tanks (without fish). Mean SGR ofduckweed was 0.02 g g–1 day–1 and thehighest SGR was recorded in the control tanks.Both decrease in NH4-N and increase inNO2-N concentrations differedsignificantly between the treatments[F(2,2) = 45.3; p = 0.02 and F(2,2) = 19.2; p = 0.04 respectively]. Changes in other nitrogenand phosphorus components (NO3-N, TN, TPand PO4-P) caused by stocking of grasscarp were not significant. Biomass ofphytoplankton, dominated by filamentous algaeand blue-greens, increased proportionately tostocking density of grass carp. Althoughduckweed has a large potential for nutrientremoval, the most common pathway for thenutrients released through grass carp grazingif duckweed cover is loose is theirincorporation into phytoplankton biomass. 相似文献
16.
Moshe Gophen 《Aquaculture (Amsterdam, Netherlands)》1979,16(1):67-71
Daphnia lumholtzi (Sars) was found in Lake Kinneret until the late nineteen-fifties. Lake Kinneret was the northern-most limit of the distribution of this species. It is suggested that fingerlings of grey mullets and Sarotherodon aureus that were introduced into Lake Kinneret caused the extinction of D. lumholtzi. 相似文献
17.
褐牙鲆(♀)×犬齿牙鲆(♂)杂交F1及其亲本肌肉营养成分分析与比较 总被引：2，自引：0，他引：2
褐牙鲆(Paralichthys olivaceus)为东亚地区重要的海水养殖鱼类,在中国、日本和韩国海水养殖业中占有重要的地位.目前,褐牙鲆经过连续多代缺乏选择的人工繁育和养殖,造成养殖群体种质发生退化,生长速度和抗逆性下降,极大制约了牙鲆养殖业发展.以选育生长迅速、抗逆性强、饵料转化率高的牙鲆类养殖新品种为目的,作者对褐牙鲆(♀)×犬齿牙鲆(Paralichthys dentatus)(♂)的杂交育种进行了研究.本实验对褐牙鲆(♀)×犬齿牙鲆(♂)杂交F1及其亲本肌肉营养成分进行测定.结果显示,杂交F1含水率显著低于双亲(P＜0.05),粗蛋白含量显著高于双亲(P＜0.05),粗脂肪含量介于二者之间;杂交F1的氨基酸总量、必需氨基酸、非必需氨基酸、半必需氨基酸与鲜味氨基酸总量都显著高于褐牙鲆与犬齿牙鲆(P＜0.05);脂肪酸含量方面,脂肪酸总量、不饱和脂肪酸总量3种鱼由高到低排列顺序为褐牙鲆、犬齿牙鲆、杂交F1,三者饱和脂肪酸总量差异不显著(P＜0.05).对3种鱼肌肉的营养品质进行了评价,杂交F1的必需氨基酸指数EAAI(90.30)明显高于褐牙鲆(77.75)与犬齿牙鲆(79.34),在蛋白质品质上表现出一定杂种优势.上述结果表明,杂交F1的肌肉具有蛋白和氨基酸含量较高、脂肪酸含量较低的特点. 相似文献
18.
叶尔羌高原鳅胚胎发育与胚后发育观察 总被引：1，自引：0，他引：1
采用形态学和生态学方法,对叶尔羌高原鳅[Triplophysa(Hedinichthys)yarkandensis(Day)]胚胎发育和胚后发育阶段全过程进行观察、拍照并测量。结果显示:叶尔羌高原鳅,卵微黏性,略有沉性,受精卵呈卵圆形,卵径为(0.60±0.052)mm,在水温(20.0±1.0)℃下,历时65 h 34 min完成整个胚胎发育分为7个生理阶段过程;胚后发育主要根据卵黄囊、体色、鼓鳔和须的变化分为仔鱼期、稚鱼期、幼鱼期。初孵卵黄囊仔鱼全长(2.0±0.65)mm,出膜后7 d,卵黄囊吸收完毕,完全消失;初孵仔鱼继续培育至16日龄,仔鱼鳃盖后缘鼓鳔明显长出,须清晰可辨,体色加深,心脏红色素明显,体色与成体相似,标志后期仔鱼发育完全进入稚鱼期,此时鱼苗全长(8.0±0.45)mm;培育至30日龄,仔鱼鼓鳔完全,鳃盖张合明显,身体透明特征消失,稚鱼阶段完成发育进入幼鱼期,此时全长达(13.0±0.55)mm,其外部形态和生态习性均与成鱼相似。试验中,卵黄囊长度(LY)和出膜天数(D)的关系式:LY=0.0286D2–0.0636D+3.1196(R2=0.9050);用直线方程拟合卵黄囊长度(LY)和卵黄囊仔鱼全长(LT)的关系式:LY=–1.315LT+5.368(R2=0.8199);拟合卵黄囊仔鱼全长(LT)和出膜后仔稚鱼天数(D)的关系式:LT=–0.0263D2+0.5113D+1.6169(R2=0.9890)。本研究旨在通过了解叶尔羌高原鳅的早期发育特征为该物种的保护和增殖对策提供科学依据,并对其苗种生产提供理论指导。 相似文献
19.
Transmission of white spot syndrome virus (WSSV) from Dendronereis spp. (Peters) (Nereididae) to penaeid shrimp 
下载免费PDF全文
下载免费PDF全文 Dendronereis spp. (Peters) (Nereididae) is a common polychaete in shrimp ponds built on intertidal land and is natural food for shrimp in traditionally managed ponds in Indonesia. White spot syndrome virus (WSSV), an important viral pathogen of the shrimp, can replicate in this polychaete (Desrina et al. 2013); therefore, it is a potential propagative vector for virus transmission. The major aim of this study was to determine whether WSSV can be transmitted from naturally infected Dendronereis spp. to specific pathogen‐free (SPF) Pacific white shrimp Litopenaeus vannamei (Boone) through feeding. WSSV was detected in naturally infected Dendronereis spp. and Penaeus monodon Fabricius from a traditional shrimp pond, and the positive animals were used in the current experiment. WSSV‐infected Dendronereis spp. and P. monodon in a pond had a point prevalence of 90% and 80%, respectively, as measured by PCR. WSSV was detected in the head, gills, blood and mid‐body of Dendronereis spp. WSSV from naturally infected Dendronereis spp was transmitted to SPF L. vannamei and subsequently from this shrimp to new naïve‐SPF L. vannamei to cause transient infection. Our findings support the contention that Dendronereis spp, upon feeding, can be a source of WSSV infection of shrimp in ponds. 相似文献
20.
In this study, the embryonic development of the eggs in the Mastacembelus mastacembelus (Bank & Solender, 1794) was examined. At the same time, possibilities of artificial breeding through artificial insemination were investigated. Artificial insemination was achieved by mixing the eggs of the mature female and sperm of the mature male samples caught with gill nets (22 × 22) in Ataturk Dam Lake in Turkey. To this end, first in a Petri dish (100 × 20), the testes were cut into small pieces with a lancet and the mixture of sperm–testes‐tissue was obtained. The fertilization rate of the eggs was found to be 80%. The diameter of the eggs ranged from 2.015to 1.147 mm. The perivitelline space formed 0.5 h after insemination. The first cleavage occurred at the animal pool 4 h after insemination. The oil droplets had fused to a single droplet 19 h after insemination. The blastoderm became an embryonic shield 30 h after insemination. The blastoderm covered almost half the egg 40 h after insemination and embryonic body was formed. The blastoderm covered almost the whole egg 50 h after insemination. Some somites were discernible 59 h after insemination. The embryonic body reached two‐third of the circumference of the egg 70 h after insemination. The tail bud began to separate from the yolk 77 h after insemination. A newly hatched larva was observed at 85 h after insemination. 相似文献