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方斑东风螺(Babylonia aerolata Link)是我国南方海产腹足纲的重要经济种类,分类上属腹足纲新腹足目蛾螺科.方斑东风螺味道鲜美,营养价值高,人工养殖具有良好的市场前景.目前,我省闽南地区东风螺人工养殖还处在试验、摸索阶段. 相似文献
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方斑东风螺（BabyloniaareolateLink）俗称花螺、香螺,隶属于腹足纲,新腹足目,蛾螺科,东风螺属,在我国主要分布于海南、广东、广西和福建南部沿海一带,（福建省北部沿海也有东风螺分布, 相似文献
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方斑东风螺的人工育苗高产技术 总被引：19，自引：1，他引：19
方斑东风螺Babylonia areolata(Lamarck)属腹足纲、新腹足目、娥螺科，是热带、亚热带种类，在我国主要分布在福建、广东和广西沿海，它生长速度快、肉质味道鲜美，是近几年新兴的一个海水养殖品种。但过度捕劳使方斑东风螺的自然资源大大减少，需要对方斑东风螺进行人工养殖以满足人们的需要。笔者在总结前人工作的基础上于2002年和2003年在湛江海洋大学覃斗试验基地进行了两年的方斑东风螺人工育苗试验，取得了出苗量1．3万只／m^2的好成绩，现将试验的技术措施和结果报道如下。 相似文献
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东风螺俗称花螺、海猪螺和南风螺。我国的主要经济种类有方斑东风螺、泥东风螺和台湾东风螺3种,分布于我国东南沿海、东南亚及日本,是热带、亚热带种类。东风螺生长速度快,养殖周期短,产量高,耐低氧,经济价值高,被认为是当今最有开发前景的海产养殖良种之一。近年来已在东南沿海为养殖者接受并逐步形成生产规模。本文综述了东风螺的人工育苗和养殖、病虫害防治技术的研究进展,旨在为今后东风螺养殖产业的持续发展提供技术保障。 相似文献
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方斑东风螺又名香螺，属腹足纲、新腹足目、娥螺科，是热带、亚热带种类，在我国主要分布在福建、广东和广西沿海，是名贵贝类，其肉质细嫩、口味鲜美、营养丰富，经济价值高，现市场售价100～120元／kg，产品畅销国内外及港澳市场，供不应求，是创汇率高的鲜活海产品。因此，近几年来，广西、广东、海南等地，人工养殖东风螺日渐升温。在对虾养殖经济效益不佳的情况下，许多养殖户开始尝试方斑东风螺与对虾混养。取得较好的效益。 相似文献
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方斑东风螺(Babylona areolata)又称东风螺、花螺、香螺、白带螺,隶属腹足纲(Gastropoda),新腹足目(Neogastropoda),蛾螺科(Buccinidae).体型为长卵形,螺旋部呈圆锥状,体螺层膨大,壳厚而坚实,壳面光滑,白色壳面具黄褐色的方形斑块,生活在水深7～30m的泥沙质海底,主要分布于我国的广东、广西、海南沿海,其肉质鲜美,营养丰富,具有很高的食用价值和经济价值. 相似文献
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方斑东风螺人工育苗和工厂化养殖技术 总被引：2，自引：0，他引：2
《中国水产》2005,(8)
方斑东风螺(Babyloniaareolata)属新腹足目(Neogastopoda)、核螺科(Pyrenidae),分布于我国广东、海南沿海的肉食性贝类,肉质鲜美,营养价值高,近几年来,产品在国内外市场大受欢迎,价格日益高涨。养殖区域也不断扩大,北到大连、天津、浙江,南到广东、广西、海南。养殖方式 相似文献
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方斑东风螺水泥池养成试验 总被引：3，自引：0，他引：3
方斑东风螺(Babylonia areolateLink)俗称东风螺,又叫小风螺、海猪螺、花螺。隶属于腹足纲,新腹足目,蛾螺科,东风螺属。该螺以鱼、虾、贝肉为食,喜栖息于沙质或沙泥质浅海。平时潜伏于沙泥层或石头缝中,摄食时爬出沙面。其食量较大,生长快,适应性强,抗病能力极强,存活率高,很适 相似文献
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Association between the interannual variation in the oceanic environment and catch rates of bigeye tuna (Thunnus obesus) in the Atlantic Ocean 
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下载免费PDF全文 The environmental processes associated with variability in the catch rates of bigeye tuna in the Atlantic Ocean are largely unexplored. This study used generalized additive models (GAMs) fitted to Taiwanese longline fishery data from 1990 to 2009 and investigated the association between environmental variables and catch rates to identify the processes influencing bigeye tuna distribution in the Atlantic Ocean. The present findings reveal that the year (temporal factor), latitude and longitude (spatial factors), and major regular longline target species of albacore catches are significant for the standardization of bigeye tuna catch rates in the Atlantic Ocean. The standardized catch rates and distribution of bigeye tuna were found to be related to environmental and climatic variation. The model selection processes showed that the selected GAMs explained 70% of the cumulative deviance in the entire Atlantic Ocean. Regarding environmental factors, the depth of the 20 degree isotherm (D20) substantially contributed to the explained deviance; other important factors were sea surface temperature (SST) and sea surface height deviation (SSHD). The potential fishing grounds were observed with SSTs of 22–28°C, a D20 shallower than 150 m and negative SSHDs in the Atlantic Ocean. The higher predicted catch rates were increased in the positive northern tropical Atlantic and negative North Atlantic Oscillation events with a higher SST and shallow D20, suggesting that climatic oscillations affect the population abundance and distribution of bigeye tuna. 相似文献
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Liping Li Rui Wang Wanwen Liang Xi Gan Ting Huang Yan Huang Jian Li Yunliang Shi Honglin Luo Ming Chen 《广西水产科技》2014,(1)
Previously, we reported 10 PEGE types of 85 tilapia Streptococcus agalactiae(GBS), which shifted from Streptococcus iniae in China, by using PEGE method. Presently, larger and more representative tilapia GBS were isolated, for the ?rst time in China, to characterize their serotypes and genetic diversities more precisely than had done before. 168 GBS strains were distributed in ?ve provinces of China, in which Guangdong, Guangxi and Hainan were the major ones, holding36.9%(62/168), 37.5%(63/168) and 19.6%(33/168), respectively. Serotypes, Ia, Ib and III, were observed in these strains and the most predominant one was Ia(95.2%), which mainly distributed in Guangdong, Guangxi and Hainan. Ia initially occurred in 2009, it shoot up to 32.1% in 2010,but decreased to 16.1% in 2011 before went up to 45.2% in 2012. Ib sporadically occurred during2007–2011, III onlyoccurred in 2012. 14 different PFGE types, including 4 new types(N, O,P and Q), were observed, in which B, D, F and G were the predominant types, holding 83.9%(141/168) of the total GBS strains. Ia corresponded to 11 PFGE types(A–H, N–P), in which type D predominated(51%). Ib represented 3 genotypes(I, J and Q) and III harbored only 2genotypes(N and F). Type N and Fsynchronously presented in Ia and III. In summary, the genetic diversity of tilapia GBS varied by serotypes and changed with geographical locations and years.Although Iastillpredominated, new rareserotypeIII alreadyoccurred in China. 相似文献
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Iciar Martinez Amaya Velasco Ricardo Pérez-Martín Eskil Forås Michiaki Yamashita Carmen G. Sotelo 《Journal Of Aquatic Food Product Technology》2013,22(4):289-297
The purpose of this work was to evaluate the suitability of a method based on the presence of two restriction sites (for Hae III and Hindf I) in the mitochondrial NADH dehydrogenase subunit 5 (mt ND5) gene to identify Scomber species. The evaluation was performed on 144 reference and market samples by sequencing of the entire 505-bp fragment of the mt ND5 gene and of a 464-bp fragment of the Kocher fragment of the cytochrome b gene (mt Cytb). Sequence analysis of any of the two fragments allows the identification of each of the four Scomber species, but S. japonicus and S. colias had the same restriction sites at the ND5 amplicon and would not have been differentiated by this analysis. Similarly, loss of the Hae III site in some S. scombrus individuals would have misidentified them as not being Scomber. All the market products were correctly labeled except one acquired in Spain labeled as originating in the Atlantic and containing S. japonicus. 相似文献
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In this experiment, a feeding trial was performed to determine the effects of fructooligosaccharide (FOS) on growth performance, digestive enzyme activity and immune response of Japanese sea bass, Lateolabrax japonicus juveniles (initial weight 38.3 ± 0.5 g), and the fish were examined following feeding with six levels of FOS (0, 0.5, 1, 2, 4 and 6 g/kg) for 28 days. Significant enhancement of weight gain (WG) and specific growth rate (SGR) was found in fish fed 1 g/kg FOS incorporated diets (p < .05), while the feed conversion ratio (FCR) in the 1, 2 g/kg FOS groups reduced significantly compared with the control (p < .05). Besides, the crude lipid in the 4, 6 g/kg FOS groups increased significantly compared with the control (p < .05). On the other hand, the erepsin and lipase activities significantly elevated in intestine of fish fed 2 g/kg FOS (p < .05) and the lysozyme activity in serum of fish fed 2 g/kg FOS were significantly higher than that in the control (p < .05). Moreover, the alkaline phosphatase activities in serum of fish fed 0.5, 1, 2 g/kg FOS were significantly higher than in control (p < .05). Regression analysis showed that the relationships between dietary FOS levels and either SGR, FCR, erepsin or lysozyme activities were best expressed by regression equations, and the optimal inclusion levels are 1.37, 1.80, 3.06, 3.11, 1.93 and 1.80 g/kg for SGR, FCR, erepsin, lipase, lysozyme and total superoxide dismutase activities, respectively. Overall, this study revealed that FOS incorporated diets could beneficial for L. japonicus culture in terms of increasing the growth, digestion and immune activities. Under the present experimental condition, the optimal supplementary level of FOS in the diet of L. japonicus is 1–3 g/kg. 相似文献
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Growth hormone (GH) and reproduction: a review 总被引：5，自引：0，他引：5
Florence Le Gac Odile Blaise Alex Fostier Pierre-Yves Le Bail Maurice Loir Brigitte Mourot Claudine Weil 《Fish physiology and biochemistry》1993,11(1-6):219-232
Interaction between growth and reproduction occurs in many vertebrates and is particularly obvious at certain stages of the life cycle in fish. Endocrine interactions between the gonadotropic axis and the somatotropic axis are described, the potential role of GH being emphasised. A comparative analysis of these phenomena in mammals, amphibians and fish, suggests a specific role of GH in the physiology of puberty, gametogenesis and fertility. It also shows the original contribution made by studies on the fish model in this field of investigations. 相似文献
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Two gonadotropins (GtH; Qa and Qb) were purified by gel filtration and ion exchange chromatography from the pituitaries of Indian walking catfish (Clarias batrachus). The presence of GtH during purification was assessed by in vitro oocyte maturation and in vivo steroidogenic activity, and their identities were determined by elution profiles, molecular weight, biological activities and yield. The molecular weights of Qa and Qb were 37 and 42 kDa, respectively, and composed of distinct subunits (Qa: 20 and 14 kDa and Qb: 26 and 18 kDa). Polyclonal antibodies raised against Qa immunostained Qa, Qb and pituitary GtH cells. A competitive Qa‐ELISA was developed whose sensitivity was 6.25 ng mL?1 (1.25 ng well?1) with intra‐ (3.5%) and inter‐ (12.4%) assay coefficients of variation. Displacement curves parallel to the standard were obtained with plasma and pituitary extracts of catfish, Qb and carp GtHII. The assay was validated by measuring the plasma Qa levels after LHRH treatment and in relation to ovarian growth in the female catfish during different reproductive phases. Based on the results, Qa and Qb corresponded to fish LH and FSH respectively. The findings will increase the knowledge of the mechanisms controlling fish reproduction and identification of sensitive phases in fish in captivity for hormonal manipulation. 相似文献
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Controlled infection of Poecilia reticulata Peters (guppy) with Tetrahymena by immersion and intraperitoneal injection 下载免费PDF全文
下载免费PDF全文 G Sharon M Pimenta‐Leibowitz M C L Vilchis N Isakov D Zilberg 《Journal of fish diseases》2015,38(1):67-74
Tetrahymena is a protozoan parasite, which infects guppy, Poecilia reticulata Peters, and causes substantial economical losses in commercial farms worldwide. Studies of guppy infected by Tetrahymena require standardized infection protocols. The LD50 for Tetrahymena infection of guppies by intraperitoneal (IP) injection was calibrated, and the level obtained was 946 parasites per fish. Guppy infection with Tetrahymena by immersion, imitating the natural route of infection via the integument, was studied under normal or stress conditions. Exposure to cold and netting (CNI) and to cold only (CI) followed by immersion exposure to 10 000 Tetrahymena per mL resulted in 22.5% and 19.2% mortality, respectively, as compared to 14.2% and 10% in groups that were netted only (NI) or non‐stressed (I). Histopathology revealed that immersion infection resulted in a systemic infection. Lysozyme levels, measured 3 weeks after infection, were significantly higher in the CNI group (288 μg per mg protein) compared with CI‐, NI‐ and I‐treated groups (94.5, 64 and 62.3 μg mg?1, respectively). There was no evident parasite immobilization activity in body homogenates, suggesting no development of acquired immunity. Re‐infection by IP injection revealed no increase in protection in any of the treatment groups, mortality range of 56.3–75%, higher than in the non‐exposed control (40.6% mortality). 相似文献
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