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浙江三门县为“中国青蟹之乡”．有围塘养殖面积9．57％亩,其中青蟹养殖9．2万亩。在养殖青蟹的同时,大多养殖塘混养了脊尾白虾,并取得很好的经济效益．单脊尾白虾养殖亩产值达3000多元。现将我县脊尾白虾围塘养殖高产技术总结如下,供大家参考： 相似文献
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我市有1．8万亩高涂蓄水养殖池塘应用了三疣梭子蟹与脊尾白虾混养模式，平均亩产脊尾白虾75千克、雌性三疣梭子蟹50千克，亩均产值6500多元，利润2500余元。现将该养殖模式介绍如下： 相似文献
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脊尾白虾自然群体与养殖群体的营养差异 总被引：1，自引：0，他引：1
对脊尾白虾的自然群体和养殖群体肌肉组织中的水分、灰分、蛋白质、脂肪含量及脂肪酸的组成进行了分析比较.结果表明,养殖白虾肌肉中的水分含量高于自然海区白虾,差异非常显著(P<0.01),分别为80.86%和79.02%,水分含量平均值为79.94%;养殖白虾肌肉中的蛋白质含量低于自然海区白虾,差异非常显著(P<0.01),分别为17.29%和19.02%,蛋白质含量平均值为18.16%;两者的灰分含量差异非常显著(P<0.01),分别为1.44%和1.39%;脂肪含量野生白虾也显著高于养殖白虾(P<0.01),分别为0.55%和0.30%;脊尾白虾含有大量的饱和及不饱和脂肪酸(C<,14-22>),饱和脂肪酸以棕榈酸为主,占总脂肪酸的15%以上,不饱和脂肪酸含量高达75%左右,其中多不饱和脂肪酸的比例非常高,养殖白虾和野生白虾分别为44.07%和46.21%,长链多不饱和脂肪酸中以EPA和DHA为主,EPA DHA含量的含量超过总脂肪酸的30%,无论是野生脊尾白虾还是养殖脊尾白虾都具有很高的营养价值,但养殖虾肉和野生虾肉相比,营养成分有较大的差异. 相似文献
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脊尾白虾（Ｅｘｏｐａｌａｍｏｎ ｃａｒｉｎｉｃａｕｄａ）称白虾，在浙江沿海一带有较高的产量，是我国重要的经济虾类之一。近几年随着海涂开发的迅速发展，白虾养殖产量迅速提高，其种苗问题越来越突出，自然纳苗所得数量已远不能满足生产发展的需要。笔者根据脊尾白虾的繁育特性，于１９９９年在慈溪市进行了脊尾白虾土池自繁养殖的试验，获得了较好的经济效益。现将情况报告如下。１基本情况１．１ 试验土池 试验用土池是在浙江省慈溪市庵东东海渔业有限公司，面积为０．４ｈｍ２，略呈长方形。在１９９９年４月初进行了清淤，使塘内… 相似文献
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Wei Ge 《Fish physiology and biochemistry》2005,31(2-3):209-214
Pituitary gonadotropins, follicle-stimulating hormone (FSH) and luteinizing hormone (LH), play fundamental roles in vertebrate
ovarian development and function. However, there has been an increasing body of evidence that the actions of FSH and LH are
mediated or modulated by a variety of locally produced peptide or protein factors, which form an intimate regulatory network
within and between the ovarian follicles. In the past few years, a variety of growth factors have been identified and characterized
in the zebrafish ovary including activin and epidermal growth factor (EGF), which are important components of the intraovarian
communication network. To understand how this local network interacts with the gonadotropins from the pituitary, we have recently
cloned and characterized all the subunits of zebrafish FSH and LH from the pituitary as well as their receptors (FSHR and
LHR) from the ovary. Using the Chinese hamster ovary (CHO) cells as the bioreactor, we have produced recombinant zebrafish
FSH and LH with biological activities. With the recombinant hormones available, the functions of zebrafish FSH and LH in the
ovary and their interactions with the local factors will be an important issue to address in the future. This review briefly
summarizes some recent work from our laboratory and others on both gonadotropins and their potential intraovarian signaling
factors in the zebrafish. 相似文献
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为了探究不同盐度对花鲈(Lateolabrax maculatus)幼鱼组织结构的影响,用组织学方法对不同盐度条件下(0、10、15、20、30)花鲈幼鱼的鳃、脾及肌肉组织结构进行研究。结果显示,盐度为0时,花鲈幼鱼鳃丝排列紧密,顶端膨大呈棒状,鳃小片细胞饱满,有少量泌氯细胞。花鲈幼鱼鳃丝宽度随盐度的升高而缩小,鳃小片间距则逐渐增大,差异显著(P<0.05);盐度为20时,部分鳃小片变形脱落,鳃丝上的泌氯细胞明显增多增大;盐度为30时,鳃丝宽度较大,出现断裂脱落,鳃丝上细胞排列疏松,泌氯细胞明显膨大,有溶解现象。脾脏在淡水条件下(盐度为0),淋巴细胞数目较少,血细胞较多;在低盐环境中(盐度为10、15),淋巴细胞增大,数量增多,黑色素巨噬细胞中心数量增加;在高盐度下(盐度为30),脾细胞和部分淋巴细胞出现肿大、空泡化现象,细胞排列疏松。盐度为0时,花鲈幼鱼肌纤维排列较为疏松,多角形或长椭圆形,长径和短径较大、密度较小;盐度为15时,肌纤维短径变小、密度增大,与0、10盐度组均差异显著,盐度为30时,肌纤维长径增大、密度减小;随着盐度的增加,肌纤维长径和短径均有先减小后增加的趋势,单位面积肌纤维数量则先增加后减小,差异显著(P<0.05)。结果表明,花鲈幼鱼鳃、脾及肌肉组织结构变化特征与其所处的环境盐度有关。 相似文献
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在实验室内营造半精养、精养养殖模式,研究不同养殖模式下底质类型(未添加底质、水泥底、全沙底、沙泥底和砂砾底)对中国明对虾(Fenneropenaeus chinensis)存活、生长及行为特征的影响.结果表明,半精养模式下,中国明对虾的存活率和蜕皮频率在各底质处理组间均无显著差异(P＞0.05);而精养模式中未添加底质处理组实验虾的存活率和蜕皮频率最低,沙泥底处理组存活率和蜕皮频率最高,分别达到100％和12.9％/d.两种养殖模式下,底质类型对中国明对虾的特定生长率(SGR)均有显著影响(p＜0.05),其中半精养模式沙泥底处理组实验虾的SGR最高,是未添加底质处理组的1.39倍;而精养模式未添加底质处理组的SGR最高,达到1.94％/d,但其与全沙底和沙泥底处理组无显著差异(P＞0.05).底质类型对实验虾的行为特征亦有显著影响(P＜0.05),半精养模式沙泥底处理组实验虾的寻(摄)食虾比率和运动率在投喂饵料前后均最高,而攻击频率在投喂饵料前于全沙底处理组中最高,投喂饵料后则在未添加底质处理组中最高,达到4.5次/(ind.h),但其与沙泥底和砂砾底处理组无显著差异(P＞0.05);精养模式下,投喂饵料前全沙底处理组实验虾的寻食虾比率和攻击频率最高,而运动率在各处理组之间无显著差异(P＞0.05),投喂饵料后实验虾的摄食虾比率在未添加底质处理组中最高,而在砂砾底处理组中最低,运动率和攻击频率则在沙泥底处理组中最高.综合分析表明,底质的添加有利于提高中国明对虾的生长和存活,且底质添加后实验虾能够根据不同底质环境进行行为的调节与整合.在本研究的4种底质类型中,中国明对虾更偏好于泥含量为30％的沙泥底质. 相似文献
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海水比重、温度和底质对青蛤稚贝生长、存活的影响 总被引：7，自引：1，他引：7
本文阐述了海水比重、温度和底质对青蛤稚贝生长和存活率的影响。青蛤稚贝在1.010～1.025比重范围内,生活正常,比重越高,生长越快;超过1.025,比重越高,生长变慢,存活率降低。青蛤适宜生长和存活的温度范围为10～33℃,在此范围内,温度越高,生长越快,存活率也就越高;超过33℃时,生长变慢,存活率降低。青蛤稚贝适宜底质为砂质和细砂质,纯泥质不适青蛤稚贝生长。 相似文献
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Sung Hwoan Cho Sang-Mok Lee Byum Hee Park Sung-Choon Ji Jinhwan Lee Jeanhee Bae Sung-Yong Oh 《Fish physiology and biochemistry》2007,33(1):49-57
This study was performed to determine the effect of the dietary inclusion of various sources of green tea on growth, body
composition and blood chemistry of the olive flounder. Twenty-five juvenile fish were distributed into each of 15 180 l flow-through
tanks. Five experimental diets with triplicates were prepared: control, raw leaves, dry leaves, by-product and extract. The
5% various sources (raw leaves, dry leaves and by-product) of green tea were included in the experimental diets at the expense
of 5% wheat flour. The extract was diluted with water and mixed with the ingredients to maintain 5% green tea at the same
concentration as in the other diets. Weight gain and specific growth rate of fish fed the control diet and experimental diet
containing extract were higher than those of fish fed the diets containing raw and dry leaves and by-product. Feed and protein
efficiency ratio for fish fed the control diet and diet containing extract was higher than for fish fed the diets containing
raw leaves and by-product. The level of low-density lipoprotein (LDL) cholesterol of fish fed the control diet was higher
than that of fish fed the other diets containing various sources of green tea. The glutamic oxaloacetic transaminase (GPT)
concentration of fish fed the diets containing raw leaves and extract was lower than that of fish fed the control diet. Crude
lipid content of liver in fish fed the control diet was higher than that in fish fed the diets containing raw and dry leaves
and by-product but was not significantly different from that of fish fed the diet containing extract. Dietary inclusion of
extract was the most effective way to improve growth and feed utilization of the olive flounder among the various sources
of green tea, and all sources of green tea were effective in lowering serum LDL cholesterol and GPT of the fish. 相似文献
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E. RINGØ R.E. OLSEN T.Ø. GIFSTAD R.A. DALMO H. AMLUND G.‐I. HEMRE A.M. BAKKE 《Aquaculture Nutrition》2010,16(2):117-136
A prebiotic is a non‐digestible food ingredient that beneficially affects the host by selectively stimulating the growth and/or the activity of one or a limited number of bacteria in the colon. Despite the potential benefits to health and performance as noted in various terrestrial animals, the use of prebiotics in the farming of fish and shellfish has been less investigated. The studies of prebiotics in fish and shellfish have investigated the following parameters: effect on growth, feed conversion, gut microbiota, cell damage/morphology, resistance against pathogenic bacteria and innate immune parameters such as alternative complement activity (ACH50), lysozyme activity, natural haemagglutination activity, respiratory burst, superoxide dismutase activity and phagocytic activity. This review discusses the results from these studies and the methods used. If the use of prebiotics leads to health responses becoming more clearly manifested in fish and shellfish, then prebiotics might have the potential to increase the efficiency and sustainability of aquaculture production. However, large gaps of knowledge exist. To fully conclude on the effects of adding prebiotics in fish diets, more research efforts are needed to provide the aquaculture industry, the scientific community, the regulatory bodies and the general public with the necessary information and tools. 相似文献
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Turbulent mixing and mesoscale distributions of late-stage fish larvae on the NW Shelf of Western Australia 总被引：2，自引：0，他引：2
M. G. MEEKAN J. H. CARLETON C. R. STEINBERG A. D. MCKINNON R. BRINKMAN P. J. DOHERTY A. HALFORD S. DUGGAN L. MASON 《Fisheries Oceanography》2006,15(1):44-59
Light traps were deployed to describe vertical and cross‐shelf distributions of late‐stage larval fishes during five cruises in each of the 1997/98 and 1998/99 summers in the region of the Gulf of Exmouth on the southern North West Shelf of Western Australia. At each light trap station on a cross‐shelf transect we measured water temperature, salinity and chlorophyll a and used vertical plankton tows to estimate zooplankton biomass and copepod abundance. Current meters were deployed on moorings near the transect and the data used to model flows and mixing on the NW Shelf and in the Gulf. The majority of reef, pelagic and baitfish larvae (81, 83 and 66% respectively) were collected at only two stations that marked the boundary between stratified waters offshore and well‐mixed water within the Gulf. Most baitfishes (primarily Spratelloides spp.) were captured by traps deployed near the seabed, while reef fishes (mostly pomacentrids, lethrinids and siganids) and pelagic species (mostly scombrids and carangids) were captured in traps deployed near surface. Catch composition varied between summers with 64% of baitfishes collected in the first summer, while the majority of reef and pelagic fishes (81 and 80% respectively) were captured in the second summer. Modelling of circulation showed that the velocity of tidal currents was enhanced by constriction of flow between NW Cape and South Muiron Island and by shallowing of the shelf. Flood‐tide intrusions of water allowed the thermocline to move up the continental shelf, upwelling cool nutrient‐rich water that was then mixed throughout the entire water column at stations in the mouth of the Gulf. This upwelling and mixing resulted in higher chlorophyll a concentrations and copepod abundances either as a result of local in situ growth or advection/aggregation processes, and may account for the great abundances of late‐stage fish larvae in the mouth of the Gulf. 相似文献
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Yichao Ren Shuanglin Dong Fang Wang Qinfeng Gao Xiangli Tian Feng Liu 《Aquaculture Research》2010,42(1):14-21
Annual sedimentation, re-suspension rates and contents of particulate organic carbon (POC), particulate organic nitrogen (PON) and total phosphorus (TP) in the sediment were investigated in two sea cucumber culture ponds at Rongcheng, Shandong Province, China. The results showed that the average flux of total particulate matter in the ponds was 22.1 g m2 d−1. The average re-suspension rate of the sediment in the ponds was 81.7%. The re-suspension rates in spring and autumn were higher than those in summer and winter. The mean contents of POC, PON and TP in the sediment of the ponds were 4.4, 0.5 and 0.6 (mg g−1), respectively, and the mean contents of Chlorophyll a (Chl a) and pheophytin in the sediment were 8.1 and 12.1 μg g−1 respectively. The POC, PON and TP contents in the sediment of the ponds increased during the period of sea cucumber aestivation (summer) and hibernation (winter), while they decreased during the feeding periods. The organic matter accumulation rate and the contents of POC, PON, TP, Chl a and pheophytin in the sediment were even lower than those in the pond without sea cucumber (P<0.05). The results demonstrated that sea cucumber culture can effectively stop nutrient accumulation at the bottom of the cucumber culture ponds. 相似文献
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松花江生态系中总汞和甲基汞迁移,积累与循环的研究 总被引：2，自引：0，他引：2
江水和沉积物中总汞、甲基汞均通过水生生物食物链逐级迁移并积累于各层次营养级生物体内，食物链越长的水生生物，体内积累越多。人们食用被污染的江鱼和利用江鱼包头的鸡、鸭、鹅等陆生动物后，总汞和甲基汞又会迁移并积累在人体内，对身体健康造成潜在威胁。 相似文献
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SUMMARY: Atka mackerel (Am) and Japanese common squid (Sq) meats were cured in 0.5–1.5 M sorbitol solutions (pH 7.0) and dried at 30°C (relative humidity, 60%), and the effect of sorbitol on the moisture transportation and textural change during the curing and drying processes was investigated. With an increase in sorbitol permeated through samples, the moisture contents decreased by 52% (Am) and 42% (Sq) by curing in 1.5 M sorbitol solution. When the cured meats were dried, slow moisture vaporization occurred at the initial drying period, and the critical moisture content significantly decreased with an increase in the sorbitol content of the cured meats. Further, the hardening of the dried products was effectively suppressed by sorbitol curing. These effects of sorbitol would contribute to the reduction of drying time and particularly the elimination of the excess hardening of dried fish products. 相似文献