Search Results
Results 201 - 250 of 590
< 1 2 3 4 5 6 7 8 9 10 >
Badrinath Padmanabhan - - 2004
On 30th July 2002, the Suffolk Communicable Disease Control Team received notifications of gastrointestinal illness due to Salmonella Enteritidis in subjects who had eaten food from a Chinese restaurant on 27th July. An Outbreak Control Team was formed resulting in extensive epidemiological, microbiological and environmental investigations. Attempts were made to ...
Terashima Jun - - 2004
In Drosophila and other insects egg production is related to the nutrients available. Somehow the nutritional status of the environment is translated into hormonal signs that can be "read" by each individual egg chamber, influencing the decision to either develop into an egg or die. We have shown that BR-C ...
Oliveira H N - - 2004
Predation by Podisus maculiventris nymphs, a predatory pentatomid, was evaluated with eggs of the flour moth Ephestia kuehniella (Pyralidae), parasitised or not by Trichogramma brassicae (pupae stage). Eggs of this pyralid were glued on rectangular cardboard and presented to nymphs of P. maculiventris as food. The pentatomid successfully reached adult ...
Balevi T - - 2004
1. This experiment was carried out to determine the effects of diets supplemented with different amounts of copper on egg production, food intake, food conversion ratio, egg weight, damaged egg ratio, specific gravity, mortality and cholesterol concentration in yolk. The experiment lasted 90 d and 400 Hisex-Brown hens, aged 27 ...
Yngvesson J - - 2004
1. Sixty-three laying hens were collected from 5 commercial farms experiencing outbreaks of cannibalism. It is known that cannibalistic behaviour varies strongly between hybrids and between individuals of the same hybrid. The aim of this study was to test specific hypotheses about the causation of cannibalism by comparing matched individuals ...
Burger Joanna - - 2004
Monitoring and assessing changes in contaminants in urban and suburban environments is essential to assessing ecosystem well-being in human-influenced landscapes. We analyzed metal and metalloid levels in the eggs of the threatened Florida scrub-jay (Aphelocoma coerulescens), an extremely sedentary and modestly long-lived passerine bird that is federally threatened and endemic ...
Lee Robin - - 2004
Salmonella enterica serotype Enteritidis (SE) is a common cause of foodborne illness in the United States. Foods prepared with raw shell eggs have often been associated with SE outbreaks. The federal government published the Egg Safety Action Plan in December 1999 that called for reduction of egg-preparation practices that may ...
Smit C Els - - 2004
The effect of zinc on growth and reproduction of the springtail Folsomia candida has been determined for individual animals exposed to contaminated food. Zinc caused a decrease in growth of the springtails, which resulted in a decrease in the estimated final fresh weight at the highest exposure level (20 mg/g ...
Bezzerides Alexander - - 2004
Pyrrolizidine alkaloid (PA), sequestered by the moth Utetheisa ornatrix from its larval food plant, is transmitted by both males and females to the eggs. Males confer PA on the female by seminal infusion, and females pass this gift, together with PA that they themselves procured as larvae, to the eggs. ...
Segura-Correa J C - - 2004
1. The productive performance of 4 chicken breed groups managed under semi-intensive conditions in Yucatan, Mexico was evaluated. Thirty-six mixed chickens, one week of age of each of the 4 breed groups (Creole, F1 Hubbard x Creole, 7/8 Hubbard x 1/8 Creole and Hubbard) were used. 2. During 1 to ...
Thavara Usavadee - - 2004
Evaluation of oviposition attractants and substrate preferences of Aedes albopictus was carried out under laboratory and field conditions. To obtain candidate oviposition substances we used a water rinse of 3 mollusk species: blood cockle (Anadara granosa), carpet shell (Paphia undulata), and sea mussel (Mytilus smaragdinus), and the giant tiger prawn ...
Guinnee Meghan A - - 2004
Life-history theory predicts that for small clutches, variance in egg size (between individuals) should decrease in a predictable invariant manner as clutch size increases. To test this, we studied Daphnia magna at 350 different food treatments and recorded the number of eggs and the volume of each egg for their ...
Vander Pol Stacy S - - 2004
Concentrations of persistent organic pollutants (POPs) in eggs of common and thick-billed murres (Uria aalge and U. lomvia) from five Alaskan nesting colonies were dominated by 4,4'-DDE, total polychlorinated biphenyls (totalPCBs; 46 congeners comprised mainly of PCB congeners 153, 118, 138, 99, and 151), hexachlorobenzene (HCB), beta-hexachlorocyclohexane (beta-HCH), and chlordane ...
Rodenburg T B - - 2004
The effect of rearing conditions on feather pecking and reaction to frustration was studied in two lines of laying hens. From commercial rearing conditions (large group, no mother hen), seven birds from a high feather pecking line (HC birds) and eight birds from a low feather pecking line (LC birds) ...
Sedlacek, Christopher
Low oxygen conditions in the water column or hypoxia occur in estuaries and impact more than just the obvious commercially important species. Copepods are an important link in the food web and the influence of hypoxia upon them is relatively unstudied. Using the copepod Acartia tonsa, a study of the ...
Lyons E T - - 2004
Prevalence of internal parasites was determined by fecal examination for eggs and oocysts in Thoroughbred foals in central Kentucky in 2003. Fecal samples were examined from 733 foals on 14 farms. This included 70 trips to the farms and a total of 2,346 fecal samplings. Monthly collection of fecal samples ...
Temkin M H - - 2004
Analysis of standard (60 frames/s) and high-speed (200 frames/s) video records revealed that unencapsulated sperm aggregates (spermatozeugmata) of the gymnolaemate bryozoan Membranipora membranacea spontaneously generate at least three types of waveforms: small amplitude, large amplitude, and reverse. All three waveforms significantly differed from one another in amplitude. Additionally, small- and ...
Zeller, Martina
The seasonal appearance and the intensity of diapausing-egg production in Eudiaptomus graciloides in five lakes of different size and trophic level were studied. In all lakes, diapausing eggs were produced in autumn. In the large mesotrophic lake Selenter See, the population’s shift to the production of diapausing eggs was more ...
Edwards D L - - 2004
The present study optimised artificial fertilisation and oocyte storage conditions in Limnodynastes tasmaniensis (Myobatrachidae). Data on general reproductive biology, the effect of sperm motility and concentration, medium osmolality and oocyte storage on artificial fertilisation success are presented. Egg number was most strongly correlated with bodyweight (r = 0.819). Sperm yield ...
De Courcy Williams Michael E - - 2004
The effect of relative humidity on egg hatch success for Iphiseius degenerans, Neoseiulus californicus and N. cucumeris was described by a binomial model with a parallel slope. The shape of the response differed for Phytoseiulus persimilis and a model with separate parameters gave a significantly better fit. Fitted response curves ...
Caprio Michael A - - 2004
Resistance management for Bt-transgenic crops relies in part on the production of sufficient numbers of susceptible insects in non-toxic refuges. Simulation models suggested that source-sink dynamics could interact with the structure of refuges to impact the production of insects in these areas. We tested the hypothesis that altering isolation between ...
Kawasaki Tamami - - 2004
Daphnia is a key crustacean zooplankton of freshwater food chains. One factor that ensures successful propagation is the Daphnia resting eggs, which are able to retain structural integrity under extreme conditions. Until recently little was known about the chemical composition, microanatomy, and physical properties of the egg itself. The current ...
de Courcy Williams Michael E - - 2004
The interplay between dietary specialism, the tolerance of food and water stress and level of cannibalism is likely to be important in determining the outcome of biological control using inundative releases of multiple natural enemies, such as phytoseiid mites in protected crops. The dietary specialist, Phytoseiulus persimilis, with a short ...
Keener K M - - 2004
The ability to rapidly cool shell eggs to 7 degrees C is important in the prevention of Salmonella Enteritidis (SE) growth. In addition, quality may also be maintained longer from rapid cooling of shell eggs. A commercial cryogenic CO2 egg cooling unit was designed and installed in a commercial egg ...
Kertész V - - 2003
The effects of chromium, lead and cadmium were studied on the embryogenesis, hatching success and viability of the mallard. Eggs were exposed to relatively low environmental concentrations that are characteristic to the level in polluted Hungarian surface waters. Eggs were treated by injection or immersion--prior to incubation. In study I, ...
Kumba F F - - 2003
As a more detailed continuation of a previous study, faecal samples for worm egg counts were collected per rectum from ten marked adult animals in selected flocks of goats, in each of six villages evenly spread out in the communal farming district of Okakarara in eastern Namibia. The study was ...
Payne Christopher C Program in Molecular and Cellular Biosciences, Department of Cell and Developmental Biology, Oregon Health and Science University, Portland, OR 97201, - - 2003
Fertilization is complete once the parental genomes unite, and requires the migration of the egg nucleus to the sperm nucleus (female and male pronuclei, respectively) on microtubules within the inseminated egg. Neither the molecular mechanism of pronucleus binding to microtubules nor the role of motor proteins in regulating pronuclear motility ...
Sánchez Thevenet P - - 2003
We investigated the presence of intestinal parasites in canine feces collected from public squares in Comodoro Rivadavia, Chubut, Argentina (45 degrees S, 68 degrees W) and determined the persistence of Echinococcus granulosus eggs in those droppings under natural environmental conditions in that region. In the first experiment, we analyzed 163 ...
Oliveira H N - - 2003
Individuals of two populations of Trichogramma maxacalii (Hymenoptera: Trichogrammatidae) were collected from eggs of Euselasia apisaon (Lepidoptera: Riodinidae), a lepidopteran defoliator of Eucalyptus, in plantations in the states of São Paulo and Minas Gerais, Brazil. This study investigated the sex ratio, number of parasitoids per egg, and longevity of individuals ...
Thouzeau Cécile - - 2003
During the last part of egg incubation in king penguins, the male can preserve undigested food in the stomach for several weeks. This ensures survival of the newly hatched chick, in cases where the return of the foraging female from the sea is delayed. In accordance with the characterization of ...
Bures Stanislav - - 2003
Calcium availability may limit the reproductive output of birds and snail shells are considered to be the main source of calcium in many passerine species. This study of collared ( Ficedula albicollis) and pied ( F. hypoleuca) flycatchers evaluates calcium intake of a natural diet in Central Europe, and sex ...
Rohlfs Marko - - 2003
In ecology, the 'aggregation model of coexistence' provides a powerful concept to explain the unexpectedly high species richness of insects on ephemeral resources like dung pats, fruits, etc. It suggests that females aggregate their eggs across resource patches, which leads to an increased intraspecific competition within occupied patches and a ...
Wauters Aline-Marie - - 2003
The aim of this study was to understand the relationship between production of food calls by maternal hens and food context. In a series of experiments with broody hens, we manipulated quality of items, quantity of food, food experience and dispersion of food items. We measured the frequency of food ...
Lang James D - - 2003
The effects of tide, temperature, rainfall, and salinity on the occurrence and abundance of immatures (instars and pupae) of the black salt marsh mosquito, Ochlerotatus taeniorhynchus (Wiedemann), were examined at a tidal pond in the Tijuana Estuary during 1996-1998. Immatures were found between May and early September. Tide had the ...
Zhang L - - 2003
The mean 48-h EC(50) (n=3) of 4-nonylphenol (NP) using ethanol as the carrier solvent was 155 microg/L, compared to a mean 48-h EC(50) (n=3) of 281 microg/L without ethanol. The 96-h EC(50)'s for embryo lethality (arrested egg development) and deformities (curved or unextended shell spines and undeveloped second antennae) were ...
Baron Florence - - 2003
Spray-dried egg white (powder) is widely used in the food industry because of its variety of functional properties and its practical advantages. Moreover, egg white powder is generally considered safe because it can withstand high temperatures that allow for the destruction of all pathogens, especially Salmonella. In France, two types ...
McKenzie Hugh A - - 2003
The isolation of S-, S1-, and S2-ovalbumin from domestic hen egg R-ovalbumin and of two methods for S-ovalbumin A1 are described. The first is by heat treatment of R-ovalbumin A1 and the second is of R-ovalbumin followed by fractionation on Sepharose. A kinetics and equilibrium study is made of their ...
Chauhan Valentina Singh - - 2003
The population which is below the poverty line is devoid of nutritious diet. Egg and milk are categorized as complete foods. The defensive organizations are situated in such remote places where fresh food material is not available. Keeping in view these problems, the study of organoleptic variables, viz., color, appearance, ...
Schramm Gabriele - - 2003
The eggs of the parasitic trematode Schistosoma mansoni are powerful inducers of a T helper type 2 (Th2) immune response and immunoglobulin E (IgE) production. S. mansoni egg extract (SmEA) stimulates human basophils to rapidly release large amounts of interleukin (IL)-4, the key promoter of a Th2 response. Here we ...
Buresch Kendra C - - 2003
Male Loligo pealeii engage in frequent agonistic bouts to gain access to female mates while aggregated at communal egg beds. Male squids are attracted to eggs in the field and in the laboratory. It was recently demonstrated that visual detection followed by physical contact with egg capsules elicited male-male aggression. ...
De Solla Shane R - - 2003
We examined hatching success, predation rates, rates of parasitism, sex ratio, and egg viability in eggs of the eastern spiny softshell (Apalone spiniferus spiniferus), a threatened species in Canada. Eggs were monitored from three populations, located at Thames River, Rondeau Provincial Park, and the Long Point National Wildlife Area, in ...
P. C. Glatz
Hens (70 weeks-of-age) with short (10-11 mm), long (13-15 mm) and divided upper beaks (1-3 mm difference in beak length between the left and right sides of the upper beak) were selected from a flock of hens beak trimmed at hatching and re-trimmed at 14 weeks. Hens were switched from ...
Kinde Hailu - - 2003
Between February 2000 and February 2002, the California Animal Health and Food Safety Laboratory System diagnosed 26 cases of low-pathogenic H6N2 avian influenza from 12 commercial egg-laying farms. The most common gross and histologic lesions observed in infected chickens were fibrinous yolk peritonitis, salpingitis, oophoritis, and nephritis. Edema of the ...
Umina Paul A - - 2003
Blue oat mites, Penthaleus spp., and redlegged earth mites, Halotydeus destructor (Tucker) are major winter pests of a variety of crops and pastures. In southern Australia earth mites exhibit a facultative egg diapause to survive unfavorable summer conditions. The initiation of diapause egg production in earth mites was investigated using ...
Suzuki Atsushi C - - 2003
A strain of carnivorous tardigrade, Milnesium tardigradum, was reared in water on agar plates at 25 degrees C. The monogonont rotifer Lecane inermis was presented as a food source. This rearing system permitted detailed observation of tardigrade behaviour. Daily measurements of body length allowed the growth rate and moulting cycle ...
Harter Stéphanie - - 2003
For the first time, a jar of embalming rejects was studied in search for helminth parasite eggs. This kind of jar was used to put discarded material by Egyptian embalmers during mummification process. Ascaris lumbricoides and Taenia saginata eggs were found in the linen and strip fragment contents of the ...
Campbell J F - - 2003
The red flour beetle, Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae) has had a long association with human stored food and can be a major pest in anthropogenic structures used for the processing and storage of grain-based products. Anthropogenic structures are fragmented landscapes characterized by spatially and temporally patchy resources. Here we ...
Sahin O - - 2003
AIMS: Campylobacter jejuni, a food-borne human pathogen, is widespread in poultry; however, the sources of infection and modes of transmission of this organism on chicken farms are not well understood. The objective of this study was to determine if vertical transmission of C. jejuni occurs via eggs. METHODS AND RESULTS: ...
Hatle John D - - 2003
The role of hemolymph ecdysteroids in the reproduction of non-dipteran insects is unclear. We examine the role(s) of hemolymph ecdysteroids during egg production in the lubber grasshopper, Romalea microptera. In all individuals, hemolymph ecdysteroids rose to a sharp peak with similar maxima and then fell to undetectable levels. The time ...
Nickol Brent B - - 2002
Because of the likelihood that Corynosoma magdaleni Montreuil, 1958. has been confused with C. strumosum (Rudolphi, 1802) in reports of parasites from seals and to clarify its distribution in the Baltic Sea, acanthocephalans from 26 young gray seals from the southwestern Finnish archipelago (western Baltic Sea) were examined. All harbored ...
< 1 2 3 4 5 6 7 8 9 10 >