共查询到19条相似文献，搜索用时 250 毫秒
1.
自1994年以来，湛江市水产局根据养殖业发展的需要，组织了栉江珧人工育苗技术攻关。1995年11月催产的栉江珧亲贝，共育出400万D型幼虫，到1996年2月初，获得平均体长8毫米的幼贝8.7万多只，初步总结出栉江珧人工育苗技术。最近，湛江市科委组织了对该项技术的鉴定。与会专家在实地考察后一致认为：该项成果把栉江珧的亲贝培育， 相似文献
2.
《渔业科学进展》2017,(2)
本研究以前期获得的栉江珧(Atrina pectinata)转录组数据为基础,筛选获得10550条微卫星标记(SSR),检出率为8.2%,平均9.01 kb出现1个SSR位点。设计并合成120对SSR引物,筛选得到36对能够稳定扩增的引物,并利用已获得的36对SSR引物对青岛海区栉江珧进行了群体遗传多样性分析。结果显示,12对引物的扩增片段表现出多态性,共产生42个等位基因,平均每个位点产生3.5个等位基因,平均观测杂合度(H_o)、平均期望杂合度(H_e)和平均多态信息含量(PIC)分别为0.417、0.604和0.526,表明青岛海区栉江珧群体的遗传多样性较高。本研究获得的EST-SSR标记和群体遗传信息为栉江珧的种质资源保护提供了重要的参考资料。 相似文献
3.
栉江珧人工育苗的初步研究 总被引：1，自引：0，他引：1
栉江珧(pinna pectinata linnaeus)隶属于软体动物门、瓣鳃纲、假瓣鳃目、江珧科，江珧属、无裂江珧亚属，北方沿海俗称“大海红”、“海锨”、“大臊蛤”、“江珧贝”等；广东称“割刀纸”；浙江沿海称“海蚌”。以其后闭壳肌加工成“江珧柱”闻名于世，是珍贵海产品。栉江珧经济价值高，便于浅海养殖，有较大发展潜力。 相似文献
4.
为了解栉江珧(Atrina pectinata)的细胞遗传学特征,取暂养促熟的雌雄亲贝共12枚为研究对象,通过调节暂养水温、采用鳃丝及鳃丝对应部位创面的愈合增生组织为染色体制备材料来改良染色体制备方法,采用常规的热滴片法制备出大量形态好且分散均匀的染色体标本,并进行染色体核型分析。结果显示,适度调节暂养水温和给鳃组织制造微创并以创面愈合增生组织为染色体制备材料均能有效增加组织细胞的分裂增生能力,为染色体制备提供了充足的材料;栉江珧二倍体染色体数目2n=34,雄性染色体组型为2n=8m+10sm+16st,雌性染色体组型为2n=6m+10sm+18st,染色体组型中,雌雄两性中期分裂相的染色体排序基本一致,都有1对染色体相对长度明显大于其他染色体;两性染色体组型有两处明显不同,其一,雄性第14对染色体为中着丝粒染色体,而雌性相对应的是亚端着丝粒染色体;其二,雄性栉江珧相对长度最大的染色体存在异形情形,雌性最大的染色体对则为同形,基本确定栉江珧存在初级的性染色体分化,属于XX/XY型性别决定方式。大型贝类染色体制备方法的改进将有助于丰富贝类细胞遗传学和分类学的研究内容。 相似文献
5.
利用通用引物对5个栉江珧野生群体(山东长岛、山东日照、山东文登、广东湛江和海南海口) 28S rRNA 和COI 基因片段进行扩增测序,分别得到983bp和623bp的片段,基于28S rRNA序列分析系统发生的结果表明,栉江珧与Atrina vexillumju具有较近的遗传关系。基于COI基因序列的遗传多样性分析结果显示,山东文登群体具有最高的遗传多样性水平。AMOVA分析显示,群体遗传分化系数为0.132 3(P<0.001),说明栉江珧遗传变异主要来源于群体内的变异。由28S rRNA和COI基因聚类分析结果推测,由于地理隔离,我国栉江珧南北方群体可能早已分化为不同亚种。这些数据为我国栉江珧种质资源保护和利用补充了分子生物学资料。 相似文献
6.
本研究以前期获得的栉江珧(Atrina pectinata)转录组数据为基础,筛选获得10550条微卫星标记(SSR),检出率为8.2％,平均9.01 kb出现1个SSR位点.设计并合成120对SSR引物,筛选得到36对能够稳定扩增的引物,并利用已获得的36对SSR引物对青岛海区栉江珧进行了群体遗传多样性分析.结果显示,12对引物的扩增片段表现出多态性,共产生42个等位基因,平均每个位点产生3.5个等位基因,平均观测杂合度(Ho)、平均期望杂合度(He)和平均多态信息含量(PIC)分别为0.417、0.604和0.526,表明青岛海区栉江珧群体的遗传多样性较高.本研究获得的EST-SSR标记和群体遗传信息为栉江珧的种质资源保护提供了重要的参考资料. 相似文献
7.
贝类人工育苗技术之三栉江珧人工升温繁育技术要点 总被引：1，自引：0，他引：1
栉江珧[Pinna(Atriina)pectinata Linnaeus]是经济价值很高的大型海洋贝类,鲜贝及"江珧柱"不仅可供国内市场消费,而且可出口创汇.现就栉江珧人工繁育技术要点总结如下. 相似文献
8.
本研究运用同源克隆技术和RACE技术克隆了栉江珧(Atrina pectinata)wnt4基因cDNA全长序列。该基因序列全长为1493 bp,其中开放阅读框1074 bp,编码由357个氨基酸组成的蛋白。氨基酸序列分析表明,栉江珧wnt4基因具有wnt家族保守结构域,与栉孔扇贝(Chlamys farreri)、海胆(Paracentrotus lividus)等物种具有高度的同源性。荧光定量PCR分析表明,wnt4基因表达具有广泛性和组织差异性,且与性别和性腺繁殖周期相关。wnt4基因表达量与性腺成熟度相关,并且整个繁殖周期卵巢表达量均显著高于精巢,说明wnt4基因参与了栉江珧两性性腺的发育,并在卵巢中发挥更重要的作用。不同发育阶段胚胎荧光定量分析表明,wnt4基因主要参与了栉江珧的早期胚胎发育。在胚胎发育早期(囊胚期和原肠期)wnt4基因的表达水平最高,是成体表达量的500倍;在担轮幼虫和D形幼虫期迅速下降,暗示wnt4基因可能在栉江珧早期发育阶段参与了某些器官的形成。17β-雌二醇诱导实验显示,17β-雌二醇可能通过反馈调节抑制卵巢wnt4基因表达(P0.05);短时间处理,17β-雌二醇能诱导精巢wnt4基因显著表达(P0.05)。 相似文献
9.
栉江珧(pinna(Alrina)peclinala Linneaus)肉味鲜美、营养价值高,其闭壳肌制成的"江珧柱"是极名贵的海味珍品.栉江珧属于广盐、广温性贝类,是我国沿海广泛分布的大型贝类之一.多年来因过度捕捞自然资源急剧衰退,远远不能满足国内外市场的需求,开展增养殖很有必要.栉江珧增养殖具有生长快、发病少、经济效益高等特点,但人工育苗技术尚未过关,制约了江珧养殖业的发展.笔者在文登市海水养殖二场进行了室内人工育苗试验,在36 m2的水泥池中培育出平均壳长3.5 mm的稚贝32.9万粒,现将试验总结如下: 相似文献
10.
栉江珧[Pinna(Atriina)pectinata Linnaeus]是经济价值很高的大型海洋贝类,鲜贝及“江珧柱”不仅可供国内市场消费,而且可出口创汇。现就栉江珧人工繁育技术要点总结如下。一、亲贝选择和促熟培育1.亲贝选择一般选用壳长20cm以上、体质健壮、贝壳无创伤、性腺发育较好的2龄~4龄 相似文献
11.
Kurihara Takeo Nakano Shoji Matsuyama Yukihiko Hashimoto Kazumasa Yamada Katsumasa Ito Atsushi Kanematsu Masaei 《International Aquatic Research》2018,10(1):1-11
International Aquatic Research - Survival time of juvenile pen shell Atrina pectinata (shell length ≈ 34 mm) exposed to hyposaline water without sediments was... 相似文献
12.
Maria Concepción Lora-Vilchis Esperanza Ruiz-Velasco-Cruz Teodoro Reynoso-Granados Domenico Voltolina 《Journal of the World Aquaculture Society》2004,35(2):232-236
–Juvenile pen shells Atrina maura were fed for 21 d with equal daily rations, equivalent to 6.5% of their live weight, of monoalgal cultures of Tetraselmis suecica, Isochrysis galbana, Chaetoceros muelleri, Chaetoceros calcitrans , and Thalassiosira pseudonana. Pen shell survival was 100% in all cases. All microalgae diets produced shell growth, and live and ash-free dry weight increases. However, the two Chaetoceros strains gave significantly better results, with shell height increases of 4.7 to 2.9 mm, live weight gains of 0.5 to 0.3 g, and final ash-free dry weights of 0.16 to 0.14 g after 3 wk. These results are not related to the algae gross biochemical composition, suggesting that other factors are involved in their nutritional value for this mollusc species. 相似文献
13.
S. Leal‐Soto R. Barraza‐Guardado R. Castro‐Longoria J. Chvez‐Villalba F. Hoyos‐Chirez 《Journal of the World Aquaculture Society》2011,42(6):789-800
Pen shells are economically important and most are threatened by overexploitation and habitat degradation. Cultivation represents an alternative for preserving the resource and increasing the production. Atrina maura was cultivated in a suspension system which was followed by a bottom phase. Samples of pen shells and tissues were collected monthly to measure absolute growth, shell height increase, and an adductor muscle index. After the trials, adults shell height was 195 ± 10 mm, total weight was 223 ± 28 g, and mean shell height increase was 0.81 cm/mo. Protective devices were vital to avoid predation by crabs and fish; survival was 90% in the suspension phase and 70% in the bottom phase. Variations in the muscle index were apparently related to reproduction, suggesting activity (partial spawning) from August 2008 to April 2009 in juveniles and a major spawning in adults during August 2009. Adductor muscles reached a mean of 21 g after 20 mo of cultivation, but muscle weights decreased significantly after reproduction (August to November 2009). Results indicated that A. maura is suitable for aquaculture and the cultivation system adopted here should be tested in pilot‐scale ventures. This system may work with other species of pen shells. 相似文献
14.
基于液相色谱-串联质谱法(liquid chromatography-tandem mass spectrometry,LC-MS/MS),比较了两种亲水交互作用(hydrophilic liquid interaction chromatography column,HILIC)色谱柱和C18色谱柱分析扁玉螺(Neverita didyma)、脉红螺(Rapana venosa)、栉江珧(Atrina pectinata)和菲律宾蛤仔(Ruditapes philippinarum)等贝类样品中神经毒素β-N-甲氨基-L-丙氨酸(β-N-methylamino-L-alanine,BMAA)及其同分异构体化合物的性能。本研究采用Agilent 6430串联质谱对3批扁玉螺样品中的游离态、总溶解态和沉淀结合态BMAA毒素进行了分析,通过AB Sciex Qtrap 4500质谱分析了其他3种贝类样品的总溶解态BMAA。结果表明,4种贝类样品均含有BMAA和低浓度的2,4-二氨基丁酸(2,4-diaminobutyric acid,DAB),且扁玉螺中的β-氨基-N-甲基丙氨酸(β-amino-N-methylalanine,BAMA)含量较低,其他3种贝类含有较高浓度的BAMA,但均未检出N-2-氨乙基甘氨酸[N-(2-aminoethyl)glycine,AEG]。HILIC-MS/MS直接分析法获得的定量结果均高于AQC-柱前衍生法的定量结果,建议使用HILIC-MS/MS直接分析法对生物样品中的BMAA进行定性和定量分析,采用变迁离子119->88和119->44的信号强度辅助定性,并使用前者的色谱峰面积进行定量计算,条件允许时可采用AQC-柱前衍生法进行辅助定性分析。本研究可为生物样品中BMAA毒素的检测分析提供重要的方法学参考。 相似文献
15.
Kazumasa Hashimoto Katsumasa Yamada Akira Nagae Yukihiko Matsuyama 《Fisheries Science》2018,84(5):837-848
Taxonomy of the pen shell (genus Atrina) in East Asia has been confused because of the plasticity of the shell morphology and lack of unified morphological characteristics. We analyzed the mitochondrial cytochrome c oxidase subunit I (COI) sequence of the pen shell sampled from Ariake Bay and Seto Inland Sea, western Japan. All individuals were identified as the scaly form based on external morphology; however, their COI sequences were comprised of two distinct lineages. The sequence divergence between the two was 8.3%, indicating the high possibility that they are different species. The scaly form of the pen shell in Japan is one of the target species for resource enhancement, therefore COI lineage identification of broodstock individuals is critically important to avoid producing hybrid seed. We developed a loop-mediated isothermal amplification method that enables specific detection of the two lineages. This method can contribute to reducing the cost and time required for genotyping broodstock individuals prior to seed production. 相似文献
16.
随机选取101只野生栉江珧,测量其壳长(SL)、壳宽(SW)、壳高(SH)、壳顶角(AG)4个形态性状和体重(WG)、软体重(WT)、闭壳肌重(WM)3个重量性状,采用相关分析和通径分析方法得出了不同形态性状对重量性状的影响效果.结果表明,除壳顶角与闭壳肌重的相关系数不显著外,其余形态性状与重量性状间的相关系数均达极显著水平(P＜0.01);壳高对重量性状的直接作用和间接作用均较大,是影响重量性状的主要因素;壳长和壳宽通过壳长对重量性状的间接作用较大,直接作用较小,是影响重量性状的两个次要因素;利用逐步回归分析建立了栉江珧形态性状关于体重(Y=69.112SH+52.823SW-751.367)、软体重(Y=37.161SH+43.404SW+4.111SA-614.096)和闭壳肌重(Y=4.275SH-18.610)的最优回归方程. 相似文献
17.
Sarawut Srithongouthai Akira Endo Akihiro Inoue Kyoko Kinoshita Miho Yoshioka Ayako Sato Takaaki Iwasaki Ichiro Teshiba Hisatsune Nashiki Daigo Hama Hiroaki Tsutsumi 《Fisheries Science》2006,72(3):485-493
ABSTRACT: A microscopic bubble generating system (MBGS) has been developed to control dissolved oxygen (DO) levels suitable for fish farming. The MBGS has been tested to confirm its capability in net pens. Water conditions in a fish farm were monitored every two hours from June to October 2004 by setting an online vertical profiling system (OVPS) close to the net pen. DO in the net pen water decreased to physiologically stressful levels for the fish during the night (4.84–5.51 mg/L), while the DO was kept in saturated conditions during the day, due to oxygen supply from phytoplankton. The MBGS was operated from the evening to the morning of the next day for 16 h, to successfully create DO-saturated conditions in the net pen water at night. By using microscopic bubbles during the warm seasons, DO levels in the net pen water could be improved to a level suitable for fish farming. However, the low DO levels (<5.0 mg/L) of the bottom water occasionally extended to the net pen layers, despite the supply of microscopic bubbles to the water. To maintain the DO of the net pen water at levels suitable for fish farming, DO supply to the net pen water and the bottom water needs to be increased, and the organically enriched sediment just below the net pens needs to be treated. 相似文献
18.
A spawning and egg collecting system for fish with pelagic eggs is described and discussed. The spawning unit is a 175 m3 submersible plastic pen supported by a polyethylene floating collar. The eggs are collected by rotating the water column in the pen and placing a net in the rotating water. The system is inexpensive and easy to operate. Temperature and illumination control are feasible.The quantity collected in the 1981 spawning season was 138 million eggs. Obtained eggs were of good quality. The theoretical spawning potential of the brood stock was 271 million eggs. This difference was mainly ascribed to suboptimal collection, but also to incomplete spawning and sinking of unfertilized and dead eggs. 相似文献
19.
采用室内控温试验,设置15、19、23、27℃4个温度梯度,每个温度梯度分别设置急剧升温和缓慢升温2种方式,研究2种升温方式对毛蚶呼吸代谢及免疫相关酶活性的影响。试验结果显示,在试验温度范围内,2种升温方式下毛蚶的耗氧率和排氨率均随海水温度的升高先增后降,于23℃达到最大值。2种升温方式下毛蚶耗氧率Q10值和排氨率Q10值在19~23℃最大,毛蚶O∶N均在19℃最小。急剧升温方式下,27℃处理组毛蚶肝胰腺中超氧化物歧化酶和过氧化氢酶的活性均呈先升后降的变化趋势,并在6 h达到峰值(P<0.05);23℃和27℃处理组毛蚶肝胰腺中酸性磷酸酶和溶菌酶活性的变化趋势均为先升后降,于6 h达到峰值(P<0.05)。2种升温方式相比,急剧升温比缓慢升温对毛蚶的影响更加明显。研究结果将有助于明确温度变化对毛蚶生理和生化活动的影响机制,为毛蚶的养殖生产提供依据。 相似文献