use of other food resources intraguild predation and links to higher organisms
Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 1 pptx
Ngày tải lên :
15/12/2013, 00:15
... Harvesting/concentration and cold storage of rotifers 3.7 Production and use of resting eggs 3.8 Literature of interest 3.9 Worksheets Worksheet 3.1 Preparation of an indicator solution for determination of residual ... activities of Dr A.G.J Tacon, Fishery Resources Officer, Inland Water Resources and Aquaculture Service, FAO Fishery Resources Division, to help meet the needs of aquaculture workers of Member ... divided into different sections according to the major groups of live food organisms used in aquaculture, namely micro-algae, rotifers, Artemia, natural zooplankton, and copepods, nematodes and trochophores...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 2 doc
Ngày tải lên :
15/12/2013, 00:15
... genera of cultured algae currently used to feed different groups of commercially important aquatic organisms The list includes species of diatoms, flagellated and chlorococcalean green algae, and ... culture should be free of organisms that may compete with the unicellular algae, such as other species of phytoplankton, phytophagous zooplankton, or bacteria Sterilization of the seawater by either ... concrete ponds of 10-40 tons of water volume and a water depth of 1.5-2 m 2.3.7 Culture of sessile micro-algae Farmers of abalone (Haliotis sp.) have developed special techniques to provide food for...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 3 ppt
Ngày tải lên :
15/12/2013, 00:15
... significantly reduce protozoan contamination Screening and cleaning of the rotifers through the use of phytoplankton filters (< 50 àm) so as to reduce the number of ciliates or other small contaminants ... 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 lorica and the profile of the spines and ornaments ... months of regular culture the stock cultures will be disinfected as described earlier in order to keep healthy and clean stock material However, the continuous maintenance of live stock cultures of...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 4 pptx
Ngày tải lên :
15/12/2013, 00:15
... biotope to another via the seas, as they depend on their physiological adaptations to high salinity to avoid predation and competition with other filter feeders Its physiological adaptations to ... outputs, not only in terms of survival, growth and success of metamorphosis of many species of fish and crustaceans, but also with regard to their quality, e.g reduced incidence of malformations, improved ... result of extreme physiological stress and water toxicity Artemia dies off at salinities close to NaCl saturation, i.e 250 g.l-1 and higher Different geographical strains have adapted to widely...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 5 docx
Ngày tải lên :
15/12/2013, 00:15
... sunlight 4.2.4 Direct use of decapsulated cysts The direct use of Artemia cysts, in its decapsulated form, is much more limited in larviculture of fish and shrimp, compared to the use of Artemia nauplii ... saving of over one third in the amount of Artemia cysts used, compared to the use of live nauplii Table 4.2.4 The proximate composition (in % of dry matter) of decapsulated Artemia cysts and instar ... output criterion is related to the total amount of food available for the predator per gram of cyst product (cf calculation of food conversion) Table 4.2.5 Effect of incubation at low salinity...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 6 docx
Ngày tải lên :
15/12/2013, 00:15
... significant reduction of labour and production costs Figure 4.3.2 Concentrator/rinser in use (Photo from Sorgeloos and Léger, 1992) As the live food is suspected to be a source of bacterial infections ... reduction of the number of hatchings and harvests daily, fewer tanks, bigger volumes) Furthermore, cold storage allows the farmer to consider more frequent and even automated food distributions of an ... cyst bill as about 20 to 30% more cysts will be needed to be hatched to feed the same weight of starved meta-nauplii to the predator (Léger et al., 1986) On the other hand, instar II stages may...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 7 pptx
Ngày tải lên :
15/12/2013, 00:15
... bubbles compared to 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 the consistency of the food quality and supply, and the possibility for storage without loss of quality It follows therefore that bulk products must be stored in a dry and preferentially cool ... concentration of particles and soluble metabolites should remain minimal as to prevent toxicity problems, proliferation of micro -organisms and interferences with the filter-feeding apparatus of the...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 8 pptx
Ngày tải lên :
15/12/2013, 00:15
... filaments) To date, the only method used to reduce the amount of filamentous algae is by manual removal and raking, which is of course very labour intensive PREDATORS AND COMPETITORS The abundance of ... with a ventilator fitted by means of an air duct to the inlet of the drum and a separate screened outlet allows discharge of the humid air Baffles are often used to improve mixing of the cysts ... pond bottom, they should only be used for a limited period of time Recommended levels of organic manure are 0.5 to 1.25 ton.ha-1 at the start of the production season with dressings of 100 to 200...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 9 pptx
Ngày tải lên :
15/12/2013, 00:15
... harvest of this live food compared to the infrastructure and production costs of the live food items discussed earlier On the other hand, there are also major drawbacks in the use of zooplankton, ... Nutritional value of Daphnia 6.1.3 Feeding and nutrition of Daphnia 6.1.4 Mass culture of Daphnia 6.1.5 Production and use of resting eggs 6.1.6 Use of Moina 6.1.1 Biology and life cycle of Daphnia ... consisting of a multispecies, natural food chain of phytoplankton (diatoms, flagellates, Nannochloris, ), zooplankton (tintinnid ciliates, Synchaeta and Brachionus rotifers, copepods, ) and predators...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 10 pptx
Ngày tải lên :
15/12/2013, 00:15
... Heterotrophic microflagellates and ciliates up to the size of Paramecium can also be used as food for Daphnia Even detritus and benthic food can be an important food source, especially when the food concentration ... migrated to the top of the tube, where they can be collected with the use of a pipet onto a 100 µm mesh screen After rinsing with seawater, the nematodes can then be fed to the larval predators Table ... zooplankton, and copepods, nematodes and trochophores The document has been prepared to help meet the needs of aquaculture workers of member countries for the synthesis of information in the field of...
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Báo cáo y học: "Organic farmers use of wild food plants and fungi in a hilly area in Styria (Austria)." docx
Ngày tải lên :
10/08/2014, 09:21
... wild food species are used in distinct regions and uses of one and the same species can differ widely from one region to another [8], this lack of information weighs heavily Instead detailed and ... needed for understanding and preserving wild food uses in distinct regions The aim of this research is to accomplish such detailed investigations We aim to explore wild food uses of farmers in the ... most often dried first; Others: used in spreads, laibchen, on pizza or for garnishing; Page of 14 Table 4: Culinary use value by species and preparation category including total number of uses and...
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The Use of Selected Medicinal Herbs for Chemoprevention and Treatment of Cancer, Parkinson’s Disease, Heart Disease, and Depression
Ngày tải lên :
25/10/2013, 05:20
... inhibition of cancer cell proliferation and induction of apoptosis; (5) regulation of subcellular signaling pathways and modulation of transcription factors; and (6) inhibition of growth factors and ... aspects of study design, performance, and analysis, with a focus on randomization of the study subjects, blinding of the investigators and study subjects, and the handling of dropouts and withdrawal ... detects DNA strand breaks and abasic sites, the genotoxicity of PhIP could be demonstrated only in the presence of hydroxyurea and 1-[beta-Darabinofuranosyl]cytosine, known inhibitors of DNA repair...
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Théorie des Fonctions Elliptiques, by Charles Briot and Jean Claude Bouquet This eBook is for the use of anyone anywhere at no cost and with almost no restrictions whatsoever docx
Ngày tải lên :
06/03/2014, 16:20
... largument de la fonction, quand la variable dộcrit le contour de laire totale dans le sens positif, est ộgale la somme des variations quil ộprouve, quand la variable dộcrit le contour de chacune des ... O ; faisons-la tourner autour du point n de gauche droite, jusqu ce quelle rencontre un ou plusieurs autres points ; faisons-la tourner ensuite autour du dernier de ces points, toujours dans ... u2 se permutent quand la variable z tourne autour du point a Dans le second cas, si lon dộcrit le cercle une troisiốme fois avec la valeur initiale u3 obtenue aprốs le second tour, il est impossible...
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Manhood Perfectly Restored, by Unknown This eBook is for the use of anyone anywhere at no cost and with almost no restrictions whatsoever. You may copy it, give it away or re-use it under the terms of the Project Gutenberg pptx
Ngày tải lên :
15/03/2014, 15:20
... pictures of lust, disease, melancholy and insanity Charnel-houses of sin and lust—sloughs of despond and regret—excess of passion offset by lack of power—dread, despair, hopelessness, shame and desperation, ... inflammation backward to the seminal ducts and neck of the bladder, may cause either Spermatorrhœa or Impotency Indeed, Stricture (often caused by Self-Abuse) is one of the most common causes of these complaints ... cure of these affections, and the bogus doctors and worthless firms that infest every large city, we have endeavored to give inquiring patients every proof and assurance of the efficacy of the...
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Outlines of Greek and Roman Medicine, by James Sands Elliott This eBook is for the use of anyone anywhere at no cost and with almost no restrictions whatsoever. You may copy it, give it away or re-use it under the terms of docx
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15/03/2014, 15:20
... consequence of the strange happening of the serpent landing from the ship the end of the island on which the Temple of Æsculapius stood was shaped into the form of the bow of a ship, and the serpent of ... appeal to doctors, to medical students, and to those of the public who are interested in a narration of the progress of knowledge, and who realize that the investigation of the body in health and ... CHAPTER IV Plato, Aristotle, the School of Alexandria, and Empiricism Plato Aristotle Alexandrian School Its Origin Its Influence Lithotomy Herophilus Erasistratus Cleombrotus Chrysippos Anatomy Empiricism...
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How Canadians'''' Use of the Internet Affects Social Life and Civic Participation pdf
Ngày tải lên :
15/03/2014, 21:20
... Percentage of home Internet users who used the Internet to research community events, Canada, 2007 % of home Internet users 44.2 Total Sex Male Female Age 16 to 24 25 to 34 35 to 44 45 to 54 55 to 64 ... majority of homes and offices, and deeply affected the ways in which we communicate and exchange information When shifts in technologies and technology use occur, utopian and dystopian views of their ... at the University of Toronto, please refer to the accompanying ‘Note to Readers’ on p 8) The study’s combination of survey and interview evidence shows that email is often used to maintain regular...
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Prevention of Pneumococcal Disease Among Infants and Children — Use of 13-Valent Pneumococcal Conjugate Vaccine and 23-Valent Pneumococcal Polysaccharide Vaccine pdf
Ngày tải lên :
22/03/2014, 10:20
... accounted for 99% of IPD cases, serotypes and together caused 0.6% of cases, and serotype 6A caused 0.6% of cases In age groups ≥5 years, the serotypes covered in PCV7 caused from 4% to 7%, and the serotypes ... in addition to the usual postlicensure monitoring of safety Also, because wide use of PCV13 can be expected to alter the distribution of S pneumoniae serotypes, continued monitoring of the epidemiologic ... Indicates too few cases in the cell to calculate rates For races other than black and white, the number of cases was too low to calculate rates in individual 1-year age strata Among children of other...
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The Eugenic Marriage, Vol 2 (of 4), by W. Grant Hague This eBook is for the use of anyone anywhere at no cost and with almost no restrictions whatsoever. You may copy it, give it away or re-use it under the terms of the Pro pptx
Ngày tải lên :
22/03/2014, 23:20
... cathartics and how to give a dose of castor oil—Castor oil—Calomel— Citrate of Magnesium—When to use castor oil—When to use calomel— Vaccination—Time for vaccination— Methods of vaccination—Symptoms of ... Constipation and pregnancy— Explanation of incomplete constipation —Causes of constipation—Negligence —Lack of exercise—Lack of water— Lack of bulk in the food taken—Abuse of cathartic drugs and aperient ... diameter of chest, inches; diameter of chest from front to back, 4-1/2 inches; length of arm to tip of middle finger, 14-1/2 inches; length of leg to the sole of the foot, 161/2 inches; total,...
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Charles Darwin, by Grant Allen1Charles Darwin, by Grant AllenThe Project Gutenberg EBook of Charles Darwin, by Grant Allen This eBook is for the use of anyone anywhere at no cost and with almost no restrictions whatsoever. You may copy it, give it aw potx
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23/03/2014, 05:20
... penalty of intellectual greatness My obligations to Professor Huxley, to Professor Fiske, to Mr Herbert Spencer, to Professor Sachs, to Hermann Müller, to Dr Krause, to Charles Darwin himself, and to ... distinct lines of ancestry, physical and spiritual, each of which separately demands elucidation He owes much in one way to his father and his mother, his grandfathers and his grandmothers, and his ... means of modification, he attributed something to the direct action of the physical conditions of life, something to the crossing of already existing forms, and much to use and disuse, that is, to...
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