... generally meet all these requirements and usually result in poor growth and survival in small fish larvae such as the Gilthead seabream On the otherhand live food organisms seem to meet all the necessary ... years through the development and use of a succession of live food organisms as feed for the developing larvae The aim of the present manual was therefore to review and summarise the latest developments ... the development of specific culture techniques, but in most cases also the production and use of live food organisms as feed for the developing larvae The present manual describes the major production...
Ngày tải lên: 15/12/2013, 00:15
... between the culture medium and the air The latter is of primary importance as the air contains the carbon source for photosynthesis in the form of carbon dioxide For very dense cultures, the CO2 ... micro-algae The most common sources of contamination include the culture medium (sea water and nutrients), the air (from the air supply as well as the environment), the culture vessel, and the starter ... In either case, the juveniles, representing the largest biomass in the hatchery and demanding the highest weight-specific rations, consume the largest volumes of algal culture (Fig 2.16.) The...
Ngày tải lên: 15/12/2013, 00:15
Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 3 ppt
... area The growth of the animal is assured by plasma increase and not by cell division The epidermis contains a densely packed layer of keratin-like proteins and is called the lorica The shape of the ... the lorica The shape of the lorica and the profile of the spines and ornaments allow the determination of the different species and morphotypes (see 3.4.) The rotifer’s body is differentiated ... consisting of the head, trunk and foot (Fig 3.1.) The head carries the rotatory organ or corona which is easily recognized by its annular ciliation and which is at the origin of the name of the Rotatoria...
Ngày tải lên: 15/12/2013, 00:15
Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 4 pptx
... However, with the expansion of aquaculture production in the 1970’s, the demand for Artemia cysts soon exceeded the offer and prices rose exponentially, turning Artemia into a bottleneck for the expansion ... “breaking”) and the embryo appears, surrounded by the hatching membrane (Fig 4.1.2.) While the embryo hangs underneath the empty shell (= “umbrella” stage) the development of the nauplius is completed and ... shell (secreted by the brown shell glands located in the uterus), enter a state of metabolic standstill or dormancy (diapause) and are then released by the female (= oviparous reproduction) (Fig...
Ngày tải lên: 15/12/2013, 00:15
Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 5 docx
... by the hatching membrane becomes visible The embryo then leaves the shell completely and hangs underneath the empty shell (the hatching membrane may still be attached to the shell) Through the ... can follow the differentiation of the pre-nauplius into the instar I nauplius which starts to move its appendages Shortly thereafter the hatching membrane breaks open (= hatching) and the free-swimming ... results in the breaking of the cyst envelope, at which moment all the glycerol produced is released in the hatching medium In other words the metabolism in Artemia cysts prior to the breaking...
Ngày tải lên: 15/12/2013, 00:15
Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 6 docx
... 1986) On the other hand, instar II stages may be more susceptible to digestive enzyme breakdown in the gut of the predator since these enzymes can also penetrate the digestive tract of the Artemia ... accessible as a prey Furthermore they contain lower amounts of free amino acids, and their lower individual organic dry weight and energy content will reduce the energy uptake by the predator per hunting ... CoulterCounter) Another important dietary characteristic of Artemia nauplii was identified in the late 1970s and early 1980s, when many fish and shrimp hatcheries scaled up their production and reported...
Ngày tải lên: 15/12/2013, 00:15
Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 7 pptx
... big ones Too small air bubbles, on the other hand, may get trapped between the thoracopods and skim off the animals to the surface WATER QUALITY The quality of the culture medium is first affected ... The main advantages of these products are their low cost and universal global availability Equally important in the evaluation of dry food is the consistency of the food quality and supply, and ... advantage of the surface respiration behaviour of the animals When the aeration in the culture tank together with the flow-through and the automatic feeding are interrupted, oxygen levels in the water...
Ngày tải lên: 15/12/2013, 00:15
Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 8 pptx
... disk (Fig 4.5.10) The disk is lowered in the water up to the point where the contrast between the white and black (or red) fields disappears, and the depth recorded After lowering the disk a little ... little more, it is then brought up slowly until the contrast is again visible and this depth is then also recorded; the average of both of the recorded depths being the turbidity The turbidity also ... analysis of the algae samples is recommended Algae composition does not only influence growth and reproduction of the Artemia, but also has an effect on the nutritional value of the biomass and the cysts...
Ngày tải lên: 15/12/2013, 00:15
Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 9 pptx
... filtration and prevent losses due to the narrow and strong back current The longer the distance between the propeller and the net, the wider and shorter the net can be The distance between the propeller ... effective and rapid the filtration Hence, the upper limit of the dimensions of the nets depends on the ease of handling rather than anything else The effectiveness of filtering is also influenced by the ... propeller (2), and a plankton net (3) (Modified from Machacek, 1991) If the distance from the propeller to the net is short, the inlet opening of the net can be reduced and the length of the net increased...
Ngày tải lên: 15/12/2013, 00:15
Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 10 pptx
... in the broodpouch and the larvae are miniature versions of the adults In some cases the embryonic period does not correspond with the brood period, and this means that the larvae are held in the ... induce the production of males These males have one or two gonopores, which open near the anus and may be modified into a copulatory organ The male clasps the female with the first antennae and ... 300 and depends largely upon the size of the female and the food intake) are laid in the brood chamber shortly after ecdysis and hatch just before the next ecdysis Embryonic...
Ngày tải lên: 15/12/2013, 00:15
Tài liệu GUIDELINES FOR THE PRODUCTION, PROCESSING, LABELLING AND MARKETING OF ORGANICALLY PRODUCED FOODS docx
... history of the land, and type of crops and livestock to be produced The concept of close contact between the consumer and the producer is a long established practice Greater market demand, the increasing ... plant, soil and water quality 34 The stocking density in buildings should: – provide for the comfort and well being of the livestock having regard for the species, the breed and the age of the livestock; ... at random 10 The operator should give the certification body or authority, for inspection purposes, access to the storage and production premises and to the parcels of land, as well as to the...
Ngày tải lên: 14/02/2014, 03:20
Tài liệu GUIDELINES FOR THE PRODUCTION, PROCESSING, LABELLING AND MARKETING OF ORGANICALLY PRODUCED FOODS pdf
... history of the land, and type of crops and livestock to be produced The concept of close contact between the consumer and the producer is a long established practice Greater market demand, the increasing ... plant, soil and water quality 34 The stocking density in buildings should: – provide for the comfort and well being of the livestock having regard for the species, the breed and the age of the livestock; ... at random 10 The operator should give the certification body or authority, for inspection purposes, access to the storage and production premises and to the parcels of land, as well as to the...
Ngày tải lên: 18/02/2014, 07:20
Báo cáo khoa học: Muramyl-dipeptide-induced mitochondrial proton leak in macrophages is associated with upregulation of uncoupling protein 2 and the production of reactive oxygen and reactive nitrogen species docx
... central nervous system, and the lack of induction of inflammatory responses [22] Despite a long-standing interest in the field of muramyl peptides, the impact of these molecules at the mitochondrial ... reveal the mechanism of action of toxic MDPs on mitochondrial respiration by correlating the uncoupling effect induced by these molecules with the level and function of UCP2 and free radical production ... defined as the phosphorylation state and is dependent on the oxygen consumption in the presence of ADP, thus reflecting the mitochondrial respiration coupled to ATP production State 4, the non-phosphorylation...
Ngày tải lên: 05/03/2014, 23:20
An Assessment of the Environmental Implications of Oil and Gas Production: A Regional Case Study pot
... bodies, and other stakeholder groups and citizens have issued studies or scrutinized the environmental implications and potential risks of expanding oil and gas production on public lands and in ... regions of the United States The Appalachian region was the first oil and gas producing area in the country; other early production areas included the Michigan-Illinois Basin and the Mid-Continent ... production in the west and comprised 15 percent of total U.S production The largest expected growth in gas production in the United States is expected to occur within these two states • Oil production...
Ngày tải lên: 06/03/2014, 16:20
A New Map of Hollywood: The Production and Distribution of American Motion Pictures pot
... the lower to the upper tier Second of all, some independent production companies work partially in the one tier and partially in the other, and others move erratically in and out of the sphere ... main factors; the Paramount antitrust decision of 1948; and the advent of television in the 1950s The Paramount decision forced the majors to divest themselves of their extensive theatre (cinema) ... Fig sketches out the ownership relations between the Hollywood majors and their parent companies, as well as between the majors and their most important subsidiary film -production and distribution...
Ngày tải lên: 07/03/2014, 15:20
History of Cinema: Hollywood and the Production Code docx
... literary property to the final approval of the finished film The core of the files is the correspondence between the studios or producers and the staffs of the PCA and the MPAA However, the files are ... attention to the need for the greatest possible care in the selection and photographing of the costumes and dresses of your women The Production Code makes it mandatory that the intimate parts of the ... paper and added to the right side of the file after the release of the film Since receiving the collection, the library staff has removed the materials from the original folders and transferred them...
Ngày tải lên: 07/03/2014, 15:20
The bioliq® bioslurry gasification process for the production of biosynfuels, organic chemicals, and energy pdf
... Table 6, together with their ΔrH and ΔrG values These thermodynamic data show the highly exothermal ΔrH and the equilibrium Gibbs free energy ΔrG = -RT lnK, but no details of the rather complex ... Page of 44 as ship fuels and for the still remaining fraction of car, truck, and bus fuels In the course of the century, the biomass demand for these conventional and new synthetic transportation ... 44 and the rough power for the high shear rate exerted heat the slurry by some kelvin or more than 10 K, increasing with the mixing time and speed Bioslurry production on the 1-t/h scale For the...
Ngày tải lên: 14/03/2014, 19:20
WASTE MANAGEMENT FROM PULP AND PAPER PRODUCTION IN THE EUROPEAN UNION doc
... Van Horn, 1997) Land application itself consists of transporting the sludges or the wastes, in cake form, from the factory to the fields, and then either spreading them on the land in a thin layer ... properly handled Such sludges are usually thickened, and then either burned in a bark-fired boiler together with bark from wood handling, or used for landfilling The problems associated with the landfilling ... concerning the management of packaging and packaging waste” In addition, it has the dual aim of protecting the environment and, at the same time, optimising the functioning of the internal market The...
Ngày tải lên: 18/03/2014, 02:20
Báo cáo " The wastewater quality from several industrial production branches and traditional production villages in the Day-Nhue river basin, North Vietnam " ppt
... of the total wastewater releases in the Day-Nhue river basin), and about 8% from the Ha Nam province; 7% from the Nam Dinh, 7% from the Ninh Binh province and 2% from the Hoa Binh province The ... observes to the Vietnamese Standards TCVN 5999-1995 The analytical methods were based on the American Standards [3] Results and discussion 3.1 Development of industrial production in the Day-Nhue ... traditional production villages In recent years, the traditional production villages have been revived and enhanced The Ministry of Science and Technology [2] reports that there were 458 traditional production...
Ngày tải lên: 22/03/2014, 12:20