锯缘青蟹精荚移植人工授精初探     

管卫兵  王桂忠  李少菁  林琼武  孔详会  谭树华 《台湾海峡》2005,24(3):339-345,i0002

模仿雄性锯缘青蟹第一腹肢,根据其在交配中的作用机制,采用常规滴管为材料,利用酒精灯灼热拉制一个前端弯曲、侧扁、管径大小接近第一腹肢的人工交接器.以无钙离子的人工海水作为青蟹人工授精的缓冲液,缓冲液中加入适量庆大霉素.首次对青蟹采用类似硬壳交配的方式,将成熟雄蟹贮精囊内的精荚和精液成功移植至雌蟹纳精囊中.结果表明精荚的人工移植不会破坏成熟雌蟹纳精囊的内环境,其内精子具正常受精能力.未交配雌青蟹精荚的人工移植没有正常产卵,但性腺得以促进发育,并能进行正常的生殖脱皮.  相似文献   

几种微藻对珠母贝面盘幼虫生长和存活的影响   总被引：1，自引：0，他引：1  

周银环  黄海立  邓陈茂  符韶 《台湾海峡》2007,26(2):249-255

研究了不同浓度的湛江等鞭金藻（Isochrysis zhanjiangensis Hu ＆Liu）、亚心形扁藻[Platymonas subcordiformis（Wille）Hazen]、小球藻（Chlorella sp.）以及这3种微藻以一定的比例混合后（简称混合藻）对珠母贝面盘幼虫生长和存活的影响.结果表明：幼虫对3种微藻都能摄食,但4种饵料相比,以湛江等鞭金藻和混合藻的饵料效果为好,亚心形扁藻在面盘幼虫发育到93μm时可以投喂,小球藻饵料效果较差,不宜单独作为面盘幼虫的饵料;湛江等鞭金藻、亚心形扁藻和混合藻的浓度对面盘幼虫生长和存活都有显著影响,小球藻对其没有显著的影响.湛江等鞭金藻和混合藻适宜的投喂浓度分别为1 000-1 500个/cm^3和1 500-2 000个/cm^3,在适宜浓度下,湛江等鞭金藻组面盘幼虫最大生长速度、存活率和壳初率以及幼虫进入壳初的时间分别为5.663μm/d、69.34%、63.68%、6d,混合藻组为6.28μm/d、69.46%、54.49%、5-6 d.  相似文献   

光臭氧技术在水产养殖中应用的初步探讨     

夏达英  肖继元 《海岸工程》1996,15(3):43-48

光激发的臭氧是使用波长低于１８０ｎｍ的光量子激发氧分子（Ｏ２）而产生的，与常规的地臭氧的区别是：光臭氧为呈碱性负离子状态的气流，它的氧化电势为２．６０Ｖ，不呈现氮氧化物，在水中的半衰期超过２ｈ，是极强的氧化剂，其杀菌消毒效果远高于常用消毒剂。它可以一次同时完成杀菌消毒、净化水质和增氧三大任务，而且不产生二次污染，是当前水产养殖中水质消毒净化的理想物质具有极其广泛的推广应用前景。  相似文献   

Aquaculture of Sarcothalia atropurpurea tetraspores in New Zealand for carrageenan production     

S. E. McNeill 《新西兰海洋与淡水研究杂志》2013,47(4):528-542

The endemic red seaweed Sarcothalia atropurpurea is a potentially valuable source of carrageenan, but no information is available on growing this species as a crop in New Zealand. Tetraspores released from wild-harvested reproductive thalli were settled onto strings and grown initially in tanks under two different day-lengths. Seeded strings were transplanted to open water at 2, 6 and 10 weeks after spore release. Gametophytic biomass was harvested twice by pruning plants approximately six and nine months after spore release. Sporeling length was correlated with day length during tank culture but these differences were not apparent after a period of open-water culture. Spores cultured with medium day-length for 6–10 weeks before transfer to open water grew into harvestable plants that contained similar amounts and types of carrageenan to that from wild material. These results demonstrate for the first time that aquaculture of gametophytic S. atropurpurea from tetraspores is possible.  相似文献   

不同养殖模式对鲫鱼(Carassius auratus)营养品质及特征风味的影响研究          下载免费PDF全文

韦毓  翁旭东  于瑾  高阳  应晓国  余林  胡家杰  曾妮 《海洋与湖沼》2024,55(1):243-252

为研究池塘内循环流水养殖与传统池塘养殖模式条件下鲫鱼的营养品质及特征风味, 对鲫鱼形体、基础营养成分、蒸煮损失和持水力、肌肉蛋白质消化率、氨基酸、脂肪酸和挥发性化合物含量等指标进行分析评价。结果表明: 跑道组和池塘组鲫鱼的形体指标和基础营养成分具有较大差异, 其中跑道组具有高蛋白低脂肪的特点。同时两种养殖模式下鲫鱼的蒸煮损失和持水力相接近。跑道组鲫鱼蛋白质消化率显著高于池塘组鲫鱼(P<0.05)。游离氨基酸分析结果表明跑道组鲫鱼中鲜味氨基酸(天冬氨酸和谷氨酸)和甜味氨基酸(谷氨酸和丙氨酸等)含量均显著高于池塘组(P<0.05), 因此跑道组鲫鱼可能具有更佳的风味。此外两种养殖模式下鲫鱼肌肉氨基酸组成无显著差异(P<0.05), 然而跑道组鲫鱼不饱和脂肪酸含量(4.803 8 g/100 g)高于池塘组(1.411 1 g/100 g)。基于GC-IMS结果可知, 两种养殖模式下鲫鱼的挥发性化合物具有显著差异。通过层次聚类热图分析从57种挥发性化合物中筛选出了33种特性差异标记物用以区分不同养殖模式下的鲫鱼。研究结果表明, 池塘内循环流水跑道养殖在一定程度上对鲫鱼营养品质和特征风味有所改善, 可以通过GC-IMS技术进行有效快速鉴别, 同时阐明了风味感官差异的物质基础, 为淡水鱼养殖模式选择和产品定位提供理论基础。  相似文献   

Research on China’s aquaculture efficiency evaluation and influencing factors with undesirable outputs     

Ji  Jianyue  Wang  Pingping 《中国海洋大学学报(英文版)》2015,14(3):569-574

Taking the aquaculture area, the number of farming boats and that of aquaculturist as input variables, the aquaculture production as desirable output variable and polluted economic loss as undesirable ...  相似文献   

Multivariate statistical analysis of underground gas storage caverns on groundwater chemistry in Korea     

Jeonghoon Lee  Kyung‐Seok Ko  Jun‐Mo Kim  Ho‐Wan Chang 《水文研究》2008,22(17):3410-3417

An understanding of groundwater flow and chemistry is important to operate underground storage caverns. Groundwater flow is mainly affected by cavern operating conditions. Groundwater chemistry is modified by disinfection activities for removing possible biological clogging and by mixing with cement pore water. It is important to discern these two effects, because wells affected by the disinfection activities may have hydrological connections with water curtains used to inject the disinfectant. However, it is difficult to separate these two effects using graphical methods because of their similar chemical characteristics. Instead, multivariate statistical analysis, such as principal component analysis (PCA) and factor analysis (FA), can be used. Groundwater samples for chemical analysis were obtained from four surveys in 1999–2000. Based on the results from PCA and FA, it appears that there were temporal variations of seepage water into the propane area when the cavern operation fluctuated, but we could not observe such variation in the butane area. These changes may occur mainly at depth, where water flow is slow and water renewal in the cavern surrounding is limited. Copyright © 2008 John Wiley & Sons, Ltd.  相似文献   

Analyzing Spatial and Temporal Changes of Aquaculture in Yunlin County,Taiwan*     

Bor‐Wen Tsai  Kang‐Tsung Chang  Chang‐Yi Chang  Chieh‐Ming Chu 《The Professional geographer》2006,58(2):161-171

This article analyzes spatial and temporal changes of aquaculture land use in Yunlin County, Taiwan, and discusses the driving forces for these changes. Digital land‐use maps and satellite imagery for 1982, 1988, 1994, and 2002 were used to extract aquaculture areas. A geographic information system was used to derive changes in aquaculture areas and to compute the spatial clustering statistics over time. A survey of eighty‐seven farmers was conducted to obtain their views and concerns about aquaculture. The results show a rapid expansion in aquaculture during the 1980s, driven mainly by exports to Japan, and a continuous decline since the mid‐1990s because of economic, environmental, and demographic factors.  相似文献   

Influence factors of phosphorus variation regularity in sediment-water system   总被引：1，自引：0，他引：1  

Shaoyong LU Xiangcan JIN Jianning GUO 《中国地球化学学报》2006,25(B08):257-257

Knowledge of phosphorus （P） variation regularity of sediment-water system has important influence on water pollution. Thus P variation regularity of top-sediment affected by some factors such as type of sediment （sandy and silty）, background value of sediment, P concentration of overlaying water, inhibiter, disinfection, was investigated. The results stated that, （1） P in the sandy sediment occurred mainly in the form of insoluble P. Silty sediment with a low background level has higher dissoluble total phosphorus （DTP） content than silty sediment with a high background level. （2） Low-P primary liquid has low TP and DTP contents, TP in the overlying water was rich in DTP. While TP in overlying water of high P primary liquid was rich in insoluble total phosphorus （ITP）. Overlying water of adding inhibitor set has high TP, dominated by ITP. TP in overlying water of no inhibitor set was dominated by DTP. Adding inhibitor set has obviously high pH value and tallish DO concentration in overlying water than in no inhibitor set. Disinfection set has high Pcontent in overlying water, DTP content is high. DO and ORP in overlying water of non-disinfection set were obviously higher than in that disinfection set.  相似文献   

WATER QUALITY STUDIES IN MALAYSIAN DISUSED MAN MADE LAKES FOR SUITABILITY OF AN AQUACULTURE PROJECT     

Azma Hanim Ismail  Mashhor Mansor  Wan Maznah W O 《湿地科学》2005,3(4)

1INTRODUCTIONWater is an essential component of an eco-sys-tem.It sustains life on the earth.A community de-pends on water for its domestic,agricultural and in-dustrials needs.According to Ackefors,et al.(1994),the term water quality'in the context ofaqua…  相似文献