... 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 ... 4.3 and 4.4) Figure 1.5 Selection criteria for larval food sources from the viewpoint of the culturist andthe cultured larva (modified from Léger et al., 1987) From the practical viewpoint of the...
... between the culture medium andthe 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, andthe 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...
... 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 andthe profile of the spines and ornaments allow the determination of the different species and morphotypes (see 3.4.) The rotifers 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...
... “breaking”) andthe 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 ... nauplius eye in the head region and three pairs of appendages: i.e the first antennae (sensorial function), the second antennae (locomotory + filter-feeding function) andthe mandibles (food uptake ... In the 1960’s, commercial provisions originated from these few sources in North America and seemed to be unlimited However, with the expansion of aquaculture production in the 1970’s, the demand...
... 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) andthe 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...
... 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 ... prior to the Artemia and undergo a several-day weaning period when both foods are given Thus, the addition of Artemia too early in the life cycle may result in the competition for the algal food ... in the culture water A major disadvantage of this method is that large amounts of expensive drugs are used and subsequently discharged into the environment, and thereby placing the animal and...
... 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 ... influence the feeding behavior of Artemia by affecting the filtration rate, ingestion rate and/ or assimilation: including the quality and quantity of thefood offered, the developmental stage of the ... of dry food is the consistency of thefood quality and supply, andthe possibility for storage without loss of quality It follows therefore that bulk products must be stored in a dry and preferentially...
... 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, andthe depth recorded After lowering the disk a little ... more than one month The algae and organic matter created in the low salinity ponds are drained to the high salinity ponds and are there available as food * Conditions in the fertilizer ponds ... enters via this way thefood cycle The other source of nitrogen is organic material in the intake water Algae use nitrate (NO3-) and ammonium (NH4+) As the nitrogen influx in the system depends...
... filtration and prevent losses due to the narrow and strong back current The longer the distance between the propeller andthe 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 ... mesh size of the net: the denser the net the faster it will clog, hence, the smaller its effectiveness It is therefore necessary to estimate with great accuracy the required size of thefood particles...
... 300 and depends largely upon the size of the female andthefood intake) are laid in the brood chamber shortly after ecdysis and hatch just before the next ecdysis Embryonic ... in the broodpouch andthe 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 ... copulatory organ The male clasps the female with the first antennae and inserts the copulatory processes into the single, median female gonopore The fertilized eggs are large, and only two are...
... with the stance phase foot and continuing up to the hip, across the pelvis, and down the swing limb, andthe chain involves at least 12 degrees of freedom at the joints and scores of muscles The ... one-for-one and is the reason for the low variance in the summation of the hip and knee moments."J4 The covariance between the hip and knee moments is a measure of this synergistic trade-off and has ... adaptations by the fir andhealthy elderly group This biomechanical study of the gait of young adult and fit andhealthy elderly subjects revealed the following: The natural walking velocity of the elderly...
... in the ISF, and 40% in the Well group) Other reported reasons were pain in the extremities and headache/migraine Almost half (47.4%) of the users of narcotic pain relievers in the CFS group and ... population-based design andthe accuracy of the collected information: all drugs and supplements were brought to clinic where a research nurse viewed them and recorded the name andthe dose A limitation ... cleaned, analyzed and interpreted the data, reviewed the literature and wrote the manuscript; JSL contributed to the statistical analysis; EMM and JFJ critically reviewed the manuscript and interpreted...
... in the ISF, and 40% in the Well group) Other reported reasons were pain in the extremities and headache/migraine Almost half (47.4%) of the users of narcotic pain relievers in the CFS group and ... population-based design andthe accuracy of the collected information: all drugs and supplements were brought to clinic where a research nurse viewed them and recorded the name andthe dose A limitation ... cleaned, analyzed and interpreted the data, reviewed the literature and wrote the manuscript; JSL contributed to the statistical analysis; EMM and JFJ critically reviewed the manuscript and interpreted...
... specimens, and comprised 11 of 43 persons with CFS and 26 of 53 healthy controls from Wichita, KS and 22 of 32 persons with CFS and 30 of 51 healthy controls from Georgia Persons with CFS andhealthy ... symptoms and requires careful medical and psychiatric evaluations to rule out conditions with similar clinical Page of 13 presentation Our study andthe negative reports from the UK andthe Netherlands ... at the Cleveland Clinic for the VP62 XMRV plasmid, Dr Ila Singh at the University of Utah for the rabbit anti-XMRV polyclonal sera, and Dr Sandra Ruscetti at the National Cancer Institute for the...
... observed between FNG andthe percentage of subjects who had tasted thefood stimuli (Table 3) Seven foods in the group of familiar foods and six foods in the group of unfamiliar foods had been tried ... used to determine the main eects of familiarity (the dichotomized form, see above) and FNG, and their interaction, on the rated willingness to try food stimuli The ANOVA, rather than correlation ... to examine whether the demographics contributed to the willingness ratings to the extent that they could make thefood neophobia scores redundant Results 3.1 Food neophobia scale The scale items...
... only, andthe International Fresh-cut Produce Association, the Produce Marketing Association, the United Fresh Fruit and Vegetable Association and Western Growers and all other contributors and ... Determining whether the primary and secondary packaging and packaging operation are sufficient to prevent subsequent contamination • Determining whether the packaging manufacturer understands the ultimate ... avoid the possibility of cross contamination NOTE: The Sanitary Food Transportation Act of 2005 has amended the Federal Food Drug and Cosmetic Act to define adulterated food to include food transported...
... including the Heschl’s gyrus, the cortex surrounding the Calcarine fissure andthe preand postcentral gyri Rates of GM losses were also very high in the angular and superior parietal gyri, in the orbital ... pallidum, and thalami For the white matter, the general pattern brought out high WM losses in the corpus callosum and in the major pathways surrounding the lateral ventricles such as the anterior and ... of the prefrontal cortex, and in the hippocampal region By contrast, the rate of GM losses appeared marginal in areas such as the lateral and medial surfaces of the superior frontal gyri, the...
... from fuel to host and of meat production for human food; understand and perhaps exploit the end products of fermentation in the cow rumen; and understand the nutritional and other consequences ... understanding of microbes, their functions, and their interactions is essential to meet the goals set out in the New Biology report Charles Rice went further and suggested that understanding and ... carbon-neutral foodand biofuel Some potential research goals • Understand more fully the genomes and niches of microbes • Understand the interaction of microbes with plants and animals and their role...
... moment, and then he dreamt he had dug a deep hole into the earth and poured in tons and tons of theFood of the Gods, andthe earth was swelling and swelling, and all the boundaries of the countries ... large But Skinner, standing at the bar and drinking his hot gin and water, with one eye roving over the things at the back of the bar andthe other fixed on the Absolute, missed the psychological ... miles and a half altogether, through the park and villages and then along the green glades of the Hickleybrow preserves The trees were all dusted with the green spangles of high spring, the hedges...