Xem 1-20 trên 135 kết quả Freshwater
  • Published in Phnom Penh in October 2002 by the. Mekong River Commission ... This paper was compiled by M.J. Phillips, with contributions from those listed in the .Thailand is blessed with an abundance of marine and freshwater resources. in 2002 it ranked in the top-ten fishing nations of the world. Thailand is also recognised for the advances it has made in developing its aquaculture sector. Capture...

    pdf65p anhtuyet 10-06-2009 87 21   Download

  • Bivalves constitute one of the largest groups, in terms of biomass, of filter-feeding organisms in many freshwater ecosystems. Freshwater bivalves have been used in an increasingly diverse array of ecotoxicological applications over the past 30 years. Among the four families of freshwater bivalves, there are sharply differing reasons for their use in ecotoxicological research. The Corbiculidae, Dreissenidae and, to a lesser extent, the Sphaeriidae, have fulfilled the traditional role of ecotoxicological research organisms....

    pdf379p 951628473 07-05-2012 39 8   Download

  • The main objectives of this study were to examine the effects of coastal eutrophication on fi sh communities, and on local recreational fi shery and commercial pikeperch fi shery on the northern coast of the Gulf of Finland. The study focused on freshwater species, as they live their entire life cycle in the most eutrophied areas, i.e., the archipelago and inner bays. Freshwater species are important for the very popular recreational fi shery, forming the bulk of the annual total catch.

    pdf24p lulanphuong 19-03-2012 53 7   Download

  • This paper reports the analyses of cyanobacteria Microcystis spp. and toxin occurrence in bloom samples from some freshwater bodies in Vietnam. Six species of Microcystis (M. aeruginosa, M. botrys, M. panniformis, M. wessenbergii, M. flos-aquae and M. protocystis) were identified in 8 bloom samples collected from Lake Tri An (Đ ng Nai province), Lake Bien Ho and Lake Duc An (Gia Lai Province), Cua Ngan, Dap Da, Nhu Y, Ho Mung sites (Thua Thien Hue Province), Lake Hoan Kiem (Ha Noi). The results of the quantitative analyses of Microcystis spp.

    pdf6p tuanlocmuido 13-12-2012 20 4   Download

  • The general objectives of the study are to evaluate the status and to find out scientific basis to develop freshwater prawn culture in brackish water, in order to diversify culture systems and species, to stabilize social-economics for inhabitants, and to adapt to the issues of sea level rise and saltwater intrusion in Mekong Delta.

    pdf25p change05 08-06-2016 8 1   Download

  • Fish (or ornamental fish) is the common name for these fish are kept for ornamental or decorative in a space, any landscape. The common feature is the type of fish for ornamental beauty is always superior than other types of fish just to eat normally.Aquarium hobby has from time immemorial, such as goldfish (Carassius auratus) has been adopted in court under the Song Dynasty - China and then spread among the people.

    pdf131p huchigo 30-09-2010 170 99   Download

  • The aims of this paper were to investigate the component fatty acids of some freshwater fish species by comparing the levels of essential fatty acids present. The FAME were determined by GC-MS and were identified using retention time locked methods and retention time databases. The fatty acids profiles include minor amounts of odd-number, branched-chain, and even-number fatty acids as well as saturated components, the MUFA and PUFA. The major SFA were C14:0 and C16:0. The C18:1 was the prominent MUFA....

    doc10p congvhs 07-10-2010 94 29   Download

  • Agrodok 15 Small-scale freshwater fish farming This Agrodok aims at providing basic information on how to set up a small-scale fish farm for subsistence purposes. As fish farming practices are very diverse, we have chosen to limit ourselves

    pdf12p trasua1 24-09-2010 83 12   Download

  • Over the past 25 years the discipline of ecotoxicology has undergone two major developments. Firstly, new assays have been developed, deploying organisms that bear added relevance to the specific environment under investigation. Several new procedures assess the effects on organisms after exposure to environmental samples rather than to spiked water or sediment samples.

    pdf274p crazy_sms 10-05-2012 28 7   Download

  • Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Wertheim cung cấp cho các bạn kiến thức về ngành y đề tài: Fine-scale differences in diel activity among nocturnal freshwater planarias (Platyhelminthes: Tricladida)...

    pdf10p thulanh23 21-11-2011 19 2   Download

  • The endemic freshwater spongeLubomirskia baicalensislives in Lake Bai-kal in winter (samples from March have been studied) under complete ice cover at near 0C, and in summer in open water at 17C (September). In March, specimens show high metabolic activity as reflected by the produc-tion of gametes.

    pdf14p inspiron33 23-03-2013 9 2   Download

  • A naturally occurring hemagglutinin was detected in the serum of the freshwater crab, Paratelphusa jacquemontii (Rathbun). Hemagglutination activity with different mam-malian erythrocytes suggested a strong affinity of the serum agglutinin for horse and rabbit erythrocytes. The most potent inhibitor of hemagglutination proved to be bovine submaxillary mucin. The lectin was purified by affinity chromatography using bovine submaxillary mucin-coupled agarose. The molecular mass of the purified lectin was 34 kDa as determined by SDS/PAGE....

    pdf8p tumor12 20-04-2013 16 2   Download

  • Tham khảo sách 'freshwater supply', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

    pdf116p nt18102 24-05-2013 15 2   Download

  • Aquaculture, also known as aquafarming, is the farming of aquatic organisms such as fish, crustaceans, molluscs and aquatic plants.[1][2] Aquaculture involves cultivating freshwater and saltwater populations under controlled conditions, and can be contrasted with commercial fishing, which is the harvesting of wild fish.[3] Mariculture refers to aquaculture practiced in marine environments and in underwater habitats.

    ppt31p ltanh04 25-05-2010 190 105   Download

  • CHƯƠNG II - HÌNH THÁI CẤU TẠO CƠ THỂ CỦA TÔM I- ĐẶC ĐIỂM HÌNH THÁI. 1/ Đặc điểm chung : + Giáp xác mười chân (Decapoda) trong thủy vực tự nhiên chia làm 2 nhóm : - Tôm - Cua + Bao gồm nhiều họ tôm khác nhau, phân bố ở thủy vực nước ngọt (Freshwater), nước lợ (Brackishwater) và nước mặn (Saline water).

    pdf22p samsara69 20-05-2011 229 77   Download

  • The steady increase in industrialization, urbanization and enormous population growth are leading to production of huge quantities of wastewaters that may frequently cause environmental hazards. Raw or treated waste water is very oft en discharged to freshwaters and results in changing ecological performance and biological diversity of these systems. About 70% of water supplied ends up as wastewater and several natural water reservoirs are being contaminated by untreated sewage/industrial effl uents. This makes waste water treatment and waste water reduction very important issues....

    pdf446p ktcn_1 10-07-2012 97 47   Download

  • As the global population grows and many developing countries modernize, the importance of water supply and water treatment becomes a much greater factor in the welfare of nations. In similar fashion, the need to address both domestic and industrial wastes generated by these nations moves higher on the scale of importance. Clearly, in today’s world the competition for water resources coupled with the unfortunate commingling of wastewater discharges with freshwater supplies creates additional pressure on treatment systems....

    pdf1357p tuananhhumg 13-10-2012 69 40   Download

  • Streptococcal disease caused by Streptococcus iniae is without doubt one of the major bacterial diseases in fish. It has been reported to cause significant mortality in more than 12 different aquaculture species. Its distribution is worldwide in both freshwater and marine environments. The annual impact to aquaculture has been estimated to be over US$100 million. However, in the past, very few reports have described its presence in Asia.

    doc15p vohnongnguyen 23-03-2010 150 39   Download

  • Myanmar was hit by Cyclone Nargis in May 2008 with winds of 190km/hour and an enormous sea surge. It destroyed houses and even whole villages and caused massive fl ooding with an offi cially estimated death toll of 140,000 people and the livelihoods of 2.4 million people seriously affected. I outlined issues relating to small-scale aquaculture in articles in previous columns (‘Myanmar revisited’ in the January-March 2009 issue and ‘Small-scale aquaculture in the Ayeyarwady Delta’ in the April-June 2009 issue).

    pdf52p huchigo 13-09-2010 101 39   Download

  • Tiger shrimp (P. monodon) and marine fishes are common fish cultured in coastal area of Vietnam. The study on nutrition for such species has not much when compared to freshwater fish species. Trash fish is the traditional feed for marine cultured fish and tiger shrimp in semi-intensive system. The supply is not stable in term of quality and quantity. Moreover, the price has increased. Therefore, finding alternative feed for trash fish is very important and crucial issues Using pellet feed in which fishmeal was replaced by plant protein that started in 90’s decade.

    pdf12p quocnamdhnl 05-12-2010 86 38   Download

Đồng bộ tài khoản