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The aim of the research, in which the questionnaire method was used, was to analyse food preferences and their determinants within the group of persons selected on the basis of sex. On the basis of the research results it can be stated that the features of food were pointed most often among the factors conditioning the food preferences. Simultaneously the features of food were most often acknowledged for the reason of not liking some food. It appeared that the food preferences of the examined population produced the evidence with enough large stability. However more frequent changes were observed in the direction from the lack of acceptance of some food to the food liking. The features of the population in a little degree differentiated the food preferences and the opinions about factors that determine these preferences.
The aim of the experiment was to examine prey size selection of peled (Coregonus peled Gmel.) larvae using Strauss linear index for food selection. For this purpose larval peled were held in illuminated cages at two stocking densities (10 000 and 40 000 individuals per cage) in three water bodies of diverse trophic characteristics. In the first days of rearing peled larvae fed on zooplankton up to 0.5 mm in length. Then most peled larvae significantly more often selected organisms up to 1 mm, which were most abundant in the environment. Under good feeding conditions, reared fish selected medium-sized zooplankters (from 0.6-1.0 mm length class, less often those 1.0-1.5 mm in length). Stronger food pressure for small prey appeared at a time of poor feeding conditions. Fish fed rather randomly on larger planktonic organisms (>1.5 mm), which were not abundant in the environment. Statistically significant differences were observed in food selection between the cages with different stocking densities, even when the feeding preferences were similar. Large variability in the feeding behaviour of peled larvae was observed during the whole rearing period.
The aim of the study was to determine the preferences and nutritional habits of Warsaw centenarians during their "third period" of life. The study was conducted by a questionnaire method among 29 centenarians. Most of centenarians had general good health condition. Almost 60% of centenarians performed manual labor in the past. Then they drank small amounts of alcohol irregularly. Several percent of centenarians smoked in the past. Before the age of sixty less people then at present snacked between meals. Sweets both now and in the past were preferred products, however, in the past sweets were rarely eaten by centenarians. At the present time centenarians ate more often yogurt, skim curd, fish, lean meat products, plant oils and sweets. The changes in eating habits were probably caused by civilization changes.
The food of Pseudorasbora parva juveniles from the Kis-Balaton Reservoir in Hungary was analyzed. Nine food components, among which filtrating Cladocera dominated, were confirmed in the diet of this fish. The highest values of the relative importance index were observed for Bosmina sp. at 53.7% (September 1991) and Daphnia sp. at 47.6 and 55.5% in July and September 1992, respectively. Due to the presence of this new ichthyofauna representative in Polish waters, it is possible that the pool of fish species which pressure filtrating Cladocera will increase. Additionally, this species may become a food competitor for native fish both in open waters and cultivation reservoirs.
Food supplementation studies often assume that animals will select artificial diets in their natural environment, and that high-protein, high-energy foods are the most appropriate supplement. These assumptions were tested in red-backed voles Clethrionomys gapperi Vigors, 1830 using food-choice experiments with sunflower seeds, oats, and commercial diets in the laboratory and field. Preferred level of dietary protein was also examined using isocaloric diets that varied only in protein content (14%, 20% and 30%). Preferences exhibited in the above trials were subsequently examined relative to natural forage. Voles demonstrated a strong preference for sunflower seeds over oats, dried alfalfa, and rabbit, guinea pig, rat and cat food. Voles preferred the 14% protein diet over the 20% and 30% protein diets. Although sunflower seeds contain more than 20% protein, voles consistently preferred this food over natural forage, perhaps because of their high fat and energy content. This indicates that tradeoffs in protein content may be made to maximize energy. We suggest that red-backed voles will select sunflower seeds in their natural environment, and that their preference for low protein likely reflects their herbivorous diet. This study highlights the importance of an a priori understanding of species-specific preferences and requirements when designing food supplementation studies.
The oats were observed to be the species mostly damaged by Oulema ssp. phytophages which is represented by the highest damage indexes of the plant in all the objects researched. The two other species: barley and spring triticale are much less sensitive to feeding of the pest. The initial damage which was due to the complementary feeding was hidden due to the compensation capabilities of the cereals. Spring barley, which tillers most, compensated for the damage most considerably. The economic harmfulness of the Oulema feeding may be estimated only in shooting phase, when also the larvae start skeleting of leaf blades. In barley and spring triticale a considerably lower larvae feeding was observed when compared with leaf beetles. The co-ordinate cultivation of the researched species with fodder pea and in two-ingredient cereal mixtures enhances the damage reduction caused by Oulema feeding.
The response of coprophagous dung beetles Geotrupes stercorosus (Scriba, 1791) to the additional food supply in the habitat was examined, as well as their food preference, the effect of food and the daily rhythm of activity, and population density. The study was conducted in the summer and early autumn periods in four years (1998–2002) in a mixed coniferous forest Leucobryo-Pinetum (Matuszkiewicz, 1962) located in central Poland (52°20’N, 27°25’E). The insects were captured in baited traps functioning as Barber’s traps do. They were marked by clipping wing covers (based on the CMR technique). In total, about 31 000 individuals were caught and marked. It has been found that among faeces of different mammals, the faeces of forest rodents are the most attractive food for dung beetles. Food stimulates movements of beetles towards its source (foraging activity). The peak activity coincides with the afternoon hours (5.43 individuals per trap, on average, P ≤ 0.0001 as compared with the other periods of the day and night). There were years with a high number of captures (11.9 individuals per trap per day) and a low searching activity, and years with a low number of captures (5.06 individuals per trap per day) and a high searching activity. To compare differences in the number of beetles captured in pitfall traps with their genuine numbers in the habitat, the method of square sampling was used for evaluating their density (1.13 × 103 individuals per ha). There were days when the locomotor activity of the dung beetles was low and days when the number of captured beetles exceeded several times their genuine density on the area of 1 ha.
The study was conducted on 28 growing female Wistar rats, fed ad libitum for 84 days with four different diets: preferred poor, preferred rich, recommended and Labofeed B. The diet intake, feed efficiency, weight/length ratio, serum TG, TC and HDL-C levels were determined. Results were verified statistically using one-way ANOVA and the Scheffe test. The poor preferred diet with predominating fruit and vegetables, in comparison to the rich preferred diet, containing sweets, lowered the risk of obesity and atherosclerosis. The recommended diet, based on the model food ration for girls aged 13-15 years, lowered the risk of these diseases too.
Prey individuals representing the bank vole Clethrionomys glareolus and the field vole Microtus agrestis were presented in pairs to male and female least weasels Mustela nivalis Linnaeus, 1766 in the laboratory. The voles were placed in two randomly selected boxes out of 8 boxes, which were connected to an arena housing the weasel. For each trial we recorded the finding, killing and eating order of the two prey individuals. Mate weasels tended to kill bank voles before field voles, and female weasels preferred to eat the bank vole first. Both sexes selected juvenile bank voles as the first prey to eat.
In 1998, 21 Przewalski’s horses Equus przewalskii have been introduced in the Chernobyl exclusion zone. During the years 1999–2000, studies on food preference were carried out in a special enclosure (70 ha) constructed for theses horses. A total of 52 plant species, belonging to 25 families were grazed by the horses. This comprised 43 % of all plant species recorded in this area. The most common families were Poaceae (17 species), Fabaceae (7 species) and Asteraceae (7 species). In general, Elytrigia repens, Trifolium pratense, Vicia cracca, Poa trivialis, Dactylis glomerata and Bromus inermis were the most preferred plant species. This preference has, however, varied from month to month. The most preferred plant species in May were Elytrigia repens, Corynephorus canescens, Festuca valesiaca and Chenopodium albuy; in June – Fabaceae , in July – Dactylis glomerata and Trifolium and in August – Elytrygia repens and Vicia cracca. A total of 27 anti-helminthic plant species were recorded in the study area, 18 of them were grazed by Przewalski’s horse.
Facultative scavengers often forage on organic wastes from urban dumps. Despite being a major scavenging raptor in many urban areas, studies on Indian subspecies of Black Kites Milvus migrans govinda are very few. We studied the pattern of offal preference by Black Kites foraging in the dumping sites adjoining two major markets of Kolkata, India through cafeteria experiments, where successful foraging events and abundance of foraging Black Kites were recorded. We also carried out questionnaire surveys among 156 meat and fish sellers of 32 markets of this area to assess their offal disposal practice and understand their attitude towards Black Kites. During questionnaire surveys majority of the respondents (77.92%), indicated that Black Kites consume various kinds of offal, particularly chicken offal from garbage dumps of Kolkata. 51.92% respondents opined that Black Kite population has declined in Kolkata, and 41.03% of them believe such decline is due to food scarcity. Still many respondents (64.74%) sell their offal, which reflect their indifferent attitude towards this scavenging raptor. During 'cafeteria experiments, we noticed that foraging kites pick up small pieces of offal from the garbage dumps, particularly chicken, mutton and fish offal (in 15.45 ± 7.749,9.7 ± 4.542 and 9.95 ± 4.951 successful foraging events/h respectively). Energy content (cal/g) of sun-dried samples of each type of offal substances revealed that the energy (calorie) of swine offal was highest followed by beef offal, mutton offal, chicken offal and fish offal. In spite of being energetically rich, beef and swine offal were less selected by Black Kites possibly because they are visibly larger than other offal, thus requires greater handling time and invites higher risk of kleptoparasitism. Successful foraging events were significantly influenced by offal type, but not by months, study sites or by the relative abundance of foraging Black Kites.
Celem niniejszej pracy była ocena wybranych elementów sposobu żywienia 200 pacjentów, hospitalizowanych z powodu chorób układu krążenia i naczyń krwionośnych, na podstawie informacji uzyskanych w trakcie przeprowadzania badań ankietowych. Ankieta dotyczyła preferencji doboru żywności oraz metod obróbki technologicznej stosowanych na co dzień w gospodarstwach domowych respondentów. Większość respondentów stosowała niewskazane metody technologiczne sporządzania potraw tj. smażenie na tłuszczu, pieczenie czy grillowanie. Wybierając produkty tłuszczowe używane do smażenia, 60% respondentów deklarowało stosowanie zalecanych tłuszczów, pozostałe 40% wybierało tłuszcze przeciwwskazane tj. margaryny. Zdecydowana większość respondentów spośród mięs wybierała te o niskiej zawartości tłuszczu. Ogólnie ankietowanych cechowała deklarowana duża częstotliwość spożycia mięsa i jego przetworów, a tylko małe lub okazjonalne spożycie ryb. Określono preferencje badanych odnośnie sposobów konsumpcji owoców i warzyw. Ponad połowa respondentów spożywała owoce surowe, 25,5% w formie częściowo przetworzonej, a 19% w formie wysoko przetworzonej. Podobny odsetek badanych deklarowało spożywanie warzyw w postaci surowej (45,5%) oraz warzyw gotowanych (45%). Tylko 10% spośród badanych spożywało warzywa w formie częściowo przetworzonej. Ankietowani deklarowali duże spożycie pieczywa mieszanego oraz wysoko przetworzonego, a małe razowego. Podsumowując należy stwierdzić, że preferencje respondentów dotyczące wybieranych produktów i spożywanych potraw nie były zgodne z zasadami racjonalnego żywienia i mogły zwiększać ryzyko niekorzystnych zmian w stanie zdrowia ankietowanych.
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