大型培养中栅藻密度的几种临界值研究与应用

大型氵蚤培养中栅藻密度的几种临界值研究与应用ＳＴＵＤＹＡＮＤＡＰＰＬＩＣＡＮＴＩＯＮＡＢＯＵＴＳＥＶＥＲＡＬＣＲＩＴＩＣＡＬＶＡＬＵＥＳＯＦＤＥＮＳＩＴＹＯＦＳＣＥＮＥＤＥＳＭＵＳＳＰ．ＩＮＴＨＥＤＡＰＨＮＩＡＭＡＧＮＡＣＵＬＴＵＲＥ黄诚陈建秀（南京...     

VARIATIONSOFCOMMUNITYSTRUCTURE，DIVERSTITYANDBIOMASSOFDEMERSALFISHASSEMBLAGEINTHEBOHAISEABETWEEN1982～

ＶＡＲＩＡＴＩＯＮＳＯＦＣＯＭＭＵＮＩＴＹＳＴＲＵＣＴＵＲＥ，ＤＩＶＥＲＳＴＩＴＹＡＮＤＢＩＯＭＡＳＳＯＦＤＥＭＥＲＳＡＬＦＩＳＨＡＳＳＥＭＢＬＡＧＥＩＮＴＨＥＢＯＨＡＩＳＥＡＢＥＴＷＥＥＮ１９８２～１９８３ＡＮＤ１９９２～１９９３ＪｉｎＸｉａｎｓｈ...     

红藻分子系统学研究进展

红藻分子系统学研究进展匡梅，王素娟，曾呈奎（上海水产大学，２０００９０）（中国科学院海洋研究所，青岛２６６０７１）关键词红藻，分子系统学ＡＤＶＡＮＣＥＳＩＮＴＨＥＳＴＵＤＹＯＦＭＯＬＥＣＵＬＡＲＳＹＳＴＥＭＡＴＩＣＳＩＮＲＨＯＤＯＰＨＹＴＡ￥Ｋｕａｎ...     

日本海马仔鱼消化系统的组织学研究

日本海马仔鱼消化系统的组织学研究ＡＳＴＵＤＹＯＮＴＨＥＨＩＳＴＯＬＯＧＹＯＦＤＩＧＥＳＴＩＶＥＳＹＳＴＥＭＯＦＬＡＲＶＡＬＳＥＡ－ＨＯＲＳＥ张峰（大连水产学院，１１６０２３）ＺｈａｎｇＦｅｎｇ（ＤａｌｉａｎＦｉｓｈｅｒｉｅｓＣｏｌｅｇｅ，１１６０２３...     

真鲷幼鱼狂游症病毒病原学初步研究↑（*）

真鲷幼鱼狂游症病毒病原学初步研究ＶＩＲＡＬＥＴＩＯＮＬＯＧＩＣＡＬＳＴＵＤＹＯＮＭＡＤＳＷＩＭＭＩＮＧＯＦＬＡＲＶＡＯＦＰＡＧＲＯＳＯＭＵＳＭＡＪＯＲ何爱华１郑永和２郭永建３梁平３何家鑫１赵莉莱１（福建省卫生防疫站病毒学研究室，福州３５０００１）１...     

INGESTIONANDEXCRETIONOFSEVERALANTIBACTERIALDRUGSBYTHEBRINESHRIMP（ARTEMIAPARTHENOGENETICA）1．TOXICITYT

ＩＮＧＥＳＴＩＯＮＡＮＤＥＸＣＲＥＴＩＯＮＯＦＳＥＶＥＲＡＬＡＮＴＩＢＡＣＴＥＲＩＡＬＤＲＵＧＳＢＹＴＨＥＢＲＩＮＥＳＨＲＩＭＰ（ＡＲＴＥＭＩＡＰＡＲＴＨＥＮＯＧＥＮＥＴＩＣＡ）１．ＴＯＸＩＣＩＴＹＴＯＡＲＴＥＭＩＡ，ＩＮＧＥＳＴＩＯＮＡＮＤＥＸＣＲ...     

养殖池塘溶氧平衡与日最低值预报的研究概况

养殖池塘溶氧平衡与日最低值预报的研究概况ＳＴＵＤＹＯＵＴＬＩＮＧＥＯＮＴＨＥＤＩＥＬＢＡＬＡＮＣＥＯＦＤＯＡＮＤＴＨＥＰＲＥＤＩＣＴＩＯＮＯＦＴＨＥＬＯＷＥＳＴＤＩＵＲＮＡＬＤＯＩＮＭＡＲＩＣＵＬＴＵＲＥＰＯＮＤＳ徐宁李德尚（青岛海洋大学水产学院，２...     

斑节对虾（Penaeus monodon）暴发性病害的病原超微结构观察

斑节对虾（Ｐｅｎａｅｕｓｍｏｎｏｄｏｎ）暴发性病害的病原超微结构观察ＳＵＰＥＲＭＩＣＲＯＳＴＲＵＣＴＵＲＥＯＢＳＥＲＶＡＴＩＯＮＯＮＰＡＴＨＯＧＥＮＯＦＥＸＰＬＯＳＩＶＥＤＩＳＥＡＳＥＯＦＢＬＡＣＫＴＩＧＥＲ（ＰＥＵＡＥＵＳＭＯＮＯＤＯＮ）邓国成李焕...     

养殖欧洲鳗鲡狂游病病理变化的电镜观察

养殖欧洲鳗鲡狂游病病理变化的电镜观察ＥＬＥＣＴＲＯＮＭＩＣＲＯＳＣＯＰＩＣＯＢＳＥＲＶＡＴＩＯＮＯＮＰＡＴＨＯＬＯＧＩＣＣＨＡＮＧＥＳＯＦＩＲＲＩＴＡＢＬＥＳＷＩＭＤＩＳＥＡＳＥＡＳＳＯＣＩＡＴＥＤＷＩＴＨＣＵＬＴＵＲＥＤＥＵＲＯＰＥＮＥＥＬ樊海平徐...     

一种内变形虫对南方鲶肠组织损伤的组织学观察

一种内变形虫对南方鲶肠组织损伤的组织学观察张其中，龙祥平（西南师范大学生物系，重庆６３０７１５）关键词内变形虫，南方鲶，肠组织损伤ＨＩＳＴＯＬＯＧＩＣＡＬＯＢＳＥＲＶＡＴＩＯＮＯＮＩＮＴＥＳＴＩＮＡＬＬＥＳＩＯＮＳＯＦＳＩＬＵＲＵＳＭＥＲＩＤＩＯＮＡ...     

Achieving sustainable aquaculture: Historical and current perspectives and future needs and challenges

Important operational changes that have gradually been assimilated and new approaches that are developing as part of the movement toward sustainable intensive aquaculture production systems are presented via historical, current, and future perspectives. Improved environmental and economic sustainability based on increased efficiency of production continues to be realized. As a result, aquaculture continues to reduce its carbon footprint through reduced greenhouse gas emissions. Reduced use of freshwater and land resources per unit of production, improved feed management practices as well as increased knowledge of nutrient requirements, effective feed ingredients and additives, domestication of species, and new farming practices are now being applied or evaluated. Successful expansion into culture of marine species, both off and on shore, offers the potential of substantial increases in sustainable intensive aquaculture production combined with integrative efforts to increase efficiency will principally contribute to satisfying the increasing global demand for protein and food security needs.     

Fish assemblage associations and thresholds with existing and projected oil and gas development

Energy development threatens fish and wildlife resources worldwide. This study used constrained ordinations to show fish assemblage structure associated with oil and gas well densities in the Colorado River Basin, Wyoming, but well densities explained only 6.4% of assemblage structure when compared to other factors. Threshold Indicator Taxonomic ANalysis showed significant negative threshold responses by some species to small levels of development (<0.15 wells km^?2), whereas positive thresholds were less distinct. Some native and imperilled species could be disproportionately affected if future oil and gas development proceeds in a manner that will impact aquatic resources. Although existing development has not substantially influenced regional fish assemblage structure, it appears to affect a subset of species. Understanding assemblage‐level responses to development can help land managers determine appropriate development levels, prioritise areas for monitoring associated with future development and identify where land protection measures may be needed to offset potential risks.     

Gar biology and culture: status and prospects

Many lepisosteid populations in North America have declined and many are now threatened as a consequence of habitat loss and alteration and commercial and sport overfishing. Over the last two decades, morphological, histological and molecular studies allowed distinguishing between different phases of development and the nutritional condition of larvae. Ontogeny of the digestive enzymes of gar larvae indicated the possibility to feed them artificial feeds since early developmental stages. An in vitro digestibility system to test different feed ingredients has been used. Important characteristics of artificial diets were identified through different feeding experiments. Endocrinological studies showed the feasibility of altering larval development and the digestive capacity of larvae. Cloning of gar growth hormone opened new avenues to enhance growth in the gars. Plasmatic vitellogenin was isolated and purified, to develop a competitive enzyme‐linked immunosorbent assay, which allowed the straightforward separation of males from females to establish appropriate proportions for reproduction and also was used to evaluate hormonal protocols to induce gonad recrudescence and spawning. This review analyzes the biology, ecology and physiology of different gar species as a basis for their domestication, mass production of larvae for repopulation experiments and for the culture of commercial‐size gar.     

Esophagoscopy and gastroscopy in dogs and cats. Technics and indications

A report is presented of esophagoscopy and gastroscopy in cats and dogs using flexible endoscopes. Following consideration of the basic equipment, an account is given of patient preparation and anesthesia, topography, investigation technique and normal findings. Diagnostic potential, indications and risks involved are discussed.     

加快城乡统筹，推进我国农垦体制创新与经济发展的研究与思考

“十一五”以来，我国农垦加快体制机制改革、结构调整和经济增长方式的转变的步伐，参与市场竞争，努力提升企业和产品竞争力，经济社会事业发展较快，对国家的贡献提升，职工收入、生活质量明显提高和改善，示范引领作用不断增强。本文针对农垦体制机制创新进展滞缓，战略定位与发展方向不明，经济增长方式转变和结构调整缺乏资本、人才、技术的支撑，没有处理好改革、发展、稳定、民生的关系，投资匮乏，发展后劲不足，人才短缺和劳动力素质低下的现状，提出在未来农垦体制机制创新中要特别关注改革方向、目标设定与评估，改革要在现行法律法规的框架内运作，改革时机的选择，处理好改革发展稳定与民生的关系，调整好内部利益分配关系，自觉融入区域经济，与地方协同发展等问题。为了促进农垦的发展，建议国家加大对农垦体制机制创新、现代农业建设、国有农场土地资源的保护、社会保障体系的完善等财政和政策的支持力度。     

添加植酸酶日粮不同磷水平和钙磷比对生长肥育猪血液生化指标和骨骼性能的影响

本试验利用饲养试验方法,研究玉米-豆粕型日粮中添加植酸酶时不同磷水平和钙磷比对生长肥育猪血清指标和骨骼性能的影响。试验选用162头20kg左右的杜长大三元杂交猪进行2×3(磷水平×钙磷比)因子饲养试验,试验分2个阶段进行,前期为生长期体重在20-60kg,后期为肥育期体重为为60-100kg。结果表明:添加植酸酶日粮磷水平对血清磷含量和碱性磷酸酶的活性影响显著(P<0.05);钙磷比对血清钙和血清磷含量的影响显著(P<0.05);添加植酸酶日粮磷水平和钙磷比对生长肥育猪骨骼性能的影响不显著(P>0.05)。在添加植酸酶条件下,降低日粮磷水平不影响猪的正常生长发育。     

奶牛酮病发病机理研究进展

结合国内外目前研究状况较为详细的综述了奶牛酮病的病因与发病机理,并分析了奶牛酮病发生的生化机制。旨在对临床实践中很好的认识诊断和群体监控奶牛酮病提供较为系统的理论依据,保证奶牛群的高产和稳产,从而创造良好的经济效益。     

温度与盐度对老年低额蚤和蚤状蚤生长及生殖的影响_

温度与盐度对老年低额蚤和蚤状蚤生长及生殖的影响王丹丽，李明云，杨天勇，胡章（宁波大学，３１５０１０）关键词老年低额　，蚤状　，温度，盐度，生长，生殖ＥＦＦＥＣＴＳＯＦＴＥＭＰＥＲＡＴＵＲＥＡＮＤＳＡＬＩＮＩＴＹＯＮＧＲＯＷＴＨＡＮＤＲＥＰＲＯＤＵＣＴ...     

川渝地区鸡皮刺螨的流行与综合防治

鸡皮刺螨是鸡的一种体外寄生的节肢动物,流行十分广泛,对养殖业发展有严重影响。为了解鸡皮刺螨的发病情况,对川渝两地的126个鸡场进行流行病学调查,感染率高达71%。同时,介绍了鸡皮刺螨的生活史、危害及防治措施,是防制鸡皮刺螨不可多得的资料。     

Composition and diversity of fish and fish catches in closures and open-access fisheries of Kenya

Abstract  Catch composition, relative abundance and diversity of fish catches in open access and three old fisheries closures were compared and contrasted with previous ecological studies. There was less variation in catch community composition among the fishing grounds than the closures, suggesting that fishing has homogenised catch composition. The trap survey found that some parrotfish [ Leptoscarus vaigiensis (Quoy &Gaimard), Calotomus carolinus (Valenciennes) and Scarus ghobban Forsskål] were relatively more common and that some important predators of macro-invertebrates [ Balistapus undulatus (Mungo Park) and Cheilinus chlorourus (Bloch)] were less common in the fishing grounds than closures. Unexpectedly, and in contrast to visual census results, cumulative number of species in catch surveys was higher in open access than closures sites. This may result from fishers covering more area and habitat or a reduction in the catch of competitively subordinate and rare species by aggressive, early-caught fish that can dominate bait. Comparisons of ecological visual census surveys and fisheries-dependent methods indicated that small differences in catch composition can reflect larger ecological differences and that baiting methods can underestimate biodiversity. Ecological impacts of fishing and large-scale changes in marine ecosystems must be considerable given the many fisheries-dependent assessments report modest changes.