THE EFFECT OF NUTRIENT INTAKE ON THE DEVELOPMENT AND THE EGG PRODUCTION OF RHODNIUS PROLIXUS STÅHL (HEMIPTERA: REDUVIIDAE)

1965 ◽  
Vol 43 (6) ◽  
pp. 891-904 ◽  
Author(s):  
W. G. Friend ◽  
C. T. H. Choy ◽  
E. Cartwright
Keyword(s):  
Body Weight ◽  
Blood Meal ◽  
Nutrient Intake ◽  
Egg Production ◽  
Abdominal Distension ◽  
Rhodnius Prolixus ◽  
The Body ◽  
Single Meal ◽  
Time Required ◽  
High Level

Nymphs of Rhodnius prolixus usually take a meal that is nine times the body weight before feeding. Adults usually take only three times their body weight as a blood meal. During the first 24 hours after feeding, the insect eliminates over 40% of the weight of the blood meal as dilute urine. The weight loss after this period is much more gradual.The minimum blood meal which promoted molting in various instars varied between 24.7 and 42.8% of the standard "maximum meal" for each instar; the minimum meal that promoted egg production was 31.3%. Limiting the size of the blood meal to these levels does not extend the time required for molting or egg production.Third- and fifth-instar nymphs, brought to a high level of nutrition by being fed a series of meals that are too small to cause molting, can be made to molt by a terminal meal that is about half the minimum single meal required to induce molting. Thus the amount of abdominal distension required to initiate molting can be lowered if the animals have been brought to a high level of nutrition.Up to a limit of 28 eggs, the number of eggs produced by a female shows good correlation with the amount of blood taken as food.

scholarly journals Efficacy of ivermectin against the bloodsucking insect, Rhodnius prolixus (Hemiptera, Triatominae)

1985 ◽  
Vol 80 (4) ◽  
pp. 439-442 ◽  
Author(s):  
Patricia de Azambuja ◽  
José Eugenio P. Lima Gomes ◽  
Fernando Lopes ◽  
Eloi S. Garcia
Keyword(s):  
Body Weight ◽  
High Mortality ◽  
Egg Production ◽  
Rhodnius Prolixus ◽  
Toxic Effects ◽  
Considerable Reduction ◽  
Endocrine Control ◽  
Adult Females ◽  
Single Meal ◽  
Lethal Doses

Ivermectin (0.2 mg/kg body weight) caused a high mortality in nymphs and adults of Rhodnius prolixus following a single meal in mice sub-cutaneously injected with the drug. This effect was more evident in nymphs of 1st-and 2nd-instar than in older nymphs and adults. Third-instar nymphs presented a high mortality when fed on mice treated with ivermectin 24 and 48 hours previously, while mortality was significantly reduced in nymphs fed on mice treated 72 hours before. Surviving 3rd-instar nymphs did not molt. When adult females were fed once on mice treated for 24 hours with ivermectin there was a considerable reduction in egg production. This inhibition was not reversed by a second feeding on normal mice. We concluded that sub-lethal doses of ivermectin caused toxic effects interfering in the neuro-endocrine control of development and reproduction of this bloodsucking insect.

Prosthesis Design for Bilateral Hip Disarticulation Management

2014 ◽  
Vol 664 ◽  
pp. 423-428
Author(s):  
Mauricio Plaza Torres ◽  
William Aperador
Keyword(s):  
Body Weight ◽  
Lower Extremity ◽  
Hip Joint ◽  
Joint Capsule ◽  
The Body ◽  
Body Weight Support ◽  
Patient Mobility ◽  
Weight Support ◽  
Crush Injuries ◽  
High Level

Hip disarticulation is an amputation through the hip joint capsule, removing the entire lower extremity, with closure of the remaining musculature over the exposed acetabulum. Tumors of the distal and proximal femur were treated by total femur resection; a hip disarticulation sometimes is performance for massive trauma with crush injuries to the lower extremity. This article discusses the design a system for rehabilitation of a patient with bilateral hip disarticulations. The prosthetics designed allowed the patient to do natural gait suspended between parallel articulate crutches with the body weight support between the crutches. The care of this patient was a challenge due to bilateral amputations at such a high level and the special needs of a patient mobility.

scholarly journals The Influence of the Mineral-Microbial Preparation on Ammonia Concentration and Productivity in Laying Hens Houses

Atmosphere ◽  
2019 ◽  
Vol 10 (12) ◽  
pp. 751 ◽  
Author(s):  
Remigiusz Gałęcki ◽  
Michał Dąbrowski ◽  
Tadeusz Bakuła ◽  
Kazimierz Obremski ◽  
Adriana Nowak ◽  
...  
Keyword(s):  
Body Weight ◽  
Linear Correlation ◽  
Egg Production ◽  
Laying Hens ◽  
Animal Health ◽  
The Body ◽  
Control Group ◽  
Microbial Composition ◽  
Experimental Group ◽  
Campylobacter Spp

The aim of this study was to evaluate the influence of the biopreparation Deodoric® on ammonia (NH3) concentration, performance, and hygiene standards in laying hen (ROSS-308) production. Statistically significant differences in NH3 concentration and the body weight of laying hens were observed between the control group (C) and the experimental group (E) where Deodoric® was applied at the set dose. In the control group, an increase in NH3 concentration could have contributed to the decrease in the body weight of laying hens, egg production, and % hen day egg production, whereas no such correlations were observed in the experimental group. A moderate linear correlation between NH3 concentration vs. humidity (r = 0.68), air flow (r = 0.48) and weakly linear correlation between NH3 concentration and age of birds (r = 0.27) was noted in group C. In group E, NH3 concentration vs. temperature (r = 0.27) and humidity (r = 0.14) were weakly correlated. Statistical analysis of changes in the microbial counts isolated from manure revealed a significant decrease of mesophilic microorganisms on day 28 decrease of Campylobacter spp. days 14 and 84 in group E. However, for the entire experimental model no statistically significant changes in the number of Campylobacter spp. and mesophilic bacteria were found. The tested preparation did not cause changes in the microbial composition of tissue swabs. Deodoric® contributes to animal welfare by reducing the ammonia concentrations in poultry houses. It is also recommended for use in poultry farms to improve animal health and performance and to generate benefits for producers.

scholarly journals The Body Weight Egg Production Paradox

1968 ◽  
Vol 47 (2) ◽  
pp. 498-504 ◽  
Author(s):  
A.W. Nordskog ◽  
D.M. Briggs
Keyword(s):  
Body Weight ◽  
Egg Production ◽  
The Body

scholarly journals Production of chickens with marginal vitamin A deficiency

1992 ◽  
Vol 68 (1) ◽  
pp. 283-291 ◽  
Author(s):  
Clive E. West ◽  
S. Reinder Sijtsma ◽  
Harry P. F. Peters ◽  
Jan H. W. M. Rombout ◽  
Akke J. Van Der Zijpp
Keyword(s):  
Body Weight ◽  
Vitamin A ◽  
General Health ◽  
Egg Production ◽  
Narrow Range ◽  
Vitamin A Deficiency ◽  
Generation Model ◽  
Vitamin A Status ◽  
Plasma Retinol ◽  
High Level

Marginally vitamin A-deficient 1-d-old chickens capable of remaining healthy for at least 6 weeks were produced using a two-generation model. In this model, hens fed on diets with a limited vitamin A content were used to obtain 1-d-old chickens which were marginally deficient in vitamin A. Only hens with a narrow range of plasma retinol values (0.60–0.85 μmol/l) were satisfactory for this purpose. Above this range the 1-d-old chickens were not marginally vitamin A deficient. Below this range egg production and hatchability were affected to some extent depending on the degree of vitamin A deficiency. Even when egg production and hatchability remained at a high level in such birds, the 1-d-old chickens produced were not sufficiently strong to survive the first weeks of life. The advantages of the two-generation model for producing marginally vitamin A-deficient chickens are the increased uniformity and predictability of the chickens with respect to body-weight, general health and vitamin A status. However, it does take about 3 months to produce such chickens.

scholarly journals Effect of arginine or glutamine supplementation on production, organ weights, interferon gamma, interleukin 6 and antibody titre of broilers

2014 ◽  
Vol 62 (3) ◽  
pp. 348-361 ◽  
Author(s):  
József Szabó ◽  
Emese Andrásofszky ◽  
Tamás Tuboly ◽  
András Bersényi ◽  
Andrea Weisz ◽  
...  
Keyword(s):  
Immune Response ◽  
Body Weight ◽  
Weight Gain ◽  
Interferon Gamma ◽  
Interleukin 6 ◽  
Egg Production ◽  
Body Weight Gain ◽  
The Body ◽  
Glutamine Supplementation ◽  
Organ Weights

The objective of this study was designed to test whether supplementation of the diet with arginine (Arg) or glutamine (Gln) or their combination influences the production, organ weights and humoral immune response of broilers. A total of 432 one-day-old male Ross 308 broiler chickens were divided into 6 treatment groups: control, Arg-0.5%, Arg-1%, Gln-0.5%, Gln-1% and Arg-0.5%+Gln-0.5%. Drinking water and feed were provided ad libitum. On day 18 of the experiment 50% of chickens in each treatment group were immunised with bovine serum albumin. Ten and 21 days after immunisation blood samples were collected to determine the anti-albumin IgY titre, interleukin 6 (IL6) and interferon gamma (IFNG) and to measure the weight of the liver, spleen, bursa of Fabricius and thymus. Arg or Gln supplementation of the diets influenced neither the production nor the organ weights until 18 days of age. Between 18 and 39 days of age both Arg (0.5% and 1%) and Arg + Gln supplementation improved the feed conversion ratio (FCR) by 3.7%, 6.3% and 4.9%, respectively, while Gln-1% worsened it by 15%. Immunisation slightly (−0.79%) depressed the body weight gain of broilers fed the control diet, which was significantly improved by both Arg (0.5 or 1%) and Arg + Gln supplementation. Immunisation increased the weight of the spleen, bursa and thymus and decreased that of the liver. Supplementation with 1% Gln depressed (−5.13%) the body weight gain of the immunised chickens but strongly stimulated the immune response. Supplementations with Arg and Gln did not influence the IL6 and IFNG level of the blood; however, on day 10 after immunisation these two parameters showed a negative correlation with each other. Regarding production, organ weights and immunity, Arg supplementation should be recommended in the grower phase, while Gln supplementation can be useful in pullets raised for egg production, where a good immune response to vaccinations is an important factor.

scholarly journals Capon Production – Breeding Stock, Rooster Castration And Rearing Methods, And Meat Quality – A Review

2014 ◽  
Vol 14 (4) ◽  
pp. 769-777 ◽  
Author(s):  
Jolanta Calik
Keyword(s):  
Body Weight ◽  
Meat Quality ◽  
Egg Production ◽  
The Body ◽  
Meat Production ◽  
Religious Ritual ◽  
Resources Conservation ◽  
Hatching Eggs ◽  
Rearing Methods

Abstract Over the last decade, there has been an increased consumer interest in niche food products with special aroma and flavour, and rich in nutrients. Poland has a large (19 lines) and valuable collection of laying hens enrolled in the genetic resources conservation programme. Research to date has shown these hen breeds to vary in phenotype, productivity, and biological quality of hatching eggs and meat. A significant problem in using hens for both egg and meat production is that the number of unwanted cockerels increases with increasing intensity of egg production. This problem can be overcome by castration of cockerels. Roosters were sterilized long before Christ, first as a religious ritual and then to increase the body weight of birds. The qualities of capon meat were noticed much later when it turned out to be more delicate, juicy and tender compared to rooster meat. The aim of this paper was to review the literature on capon production, including the effects of castration on the bird’s body and on the quality of meat obtained.

scholarly journals SUMMIT METABOLISM OF NEWBORN CALVES WITH AND WITHOUT COLOSTRUM FEEDING

1986 ◽  
Vol 66 (4) ◽  
pp. 937-944 ◽  
Author(s):  
M. OKAMOTO ◽  
J. B. ROBINSON ◽  
R. J. CHRISTOPHERSON ◽  
B. A. YOUNG
Keyword(s):  
Body Weight ◽  
Metabolic Rate ◽  
Rectal Temperature ◽  
Cold Water ◽  
Water Immersion ◽  
Resting Metabolic Rate ◽  
The Body ◽  
Metabolic Rates ◽  
Colostrum Feeding ◽  
Time Required

Resting and summit metabolic rates were measured in 13 newborn (2.5–15 h old) male Holstein calves exposed to warm and cold tempertures in a water immersion system. Six calves were bottle fed 1 kg of colostrum 30 min before the measurements commenced. In the remaining seven calves, colostrum was withheld until after the end of the measurement period. There were no significant effects of colostrum feeding on resting or summit metabolic rates or the time required for rectal temperature to drop to 35 °C when the calves were immersed in cold water. The time required for rectal temperature to drop to 35 °C increased as the body weight of the calves increased; for each kilogram additional body weight, cooling was delayed for an extra 2.9 min. The resting metabolic rate averaged for both feeding treatments was 2.0 ± 0.1 W kg−1 while mean rectal temperature was 39.1 ± 0.2 °C. Mean summit metabolic rate was 7.2 ± 0.4 W kg−1 and occurred at a mean rectal temperature of 35.4 ± 0.3 °C. The average ratio of the summit to resting metabolic rate was 3.7 ± 0.2. Cooling via water immersion was associated with increases in plasma levels of glucose and free fatty acids. The feeding of 1 kg of colostrum 30 min prior to exposure to acute cold did not improve the apparent resistance of the calves to hypothermia. Key words: Newborn calf, summit metabolism, cold tolerance

scholarly journals On the use of inhibitors of 4-hydroxyphenylpyruvate dioxygenase as a vector-selective insecticide in the control of mosquitoes

2019 ◽  
Author(s):  
Marlon A. V. Ramirez ◽  
Marcos Sterkel ◽  
Ademir de Jesus Martins ◽  
José Bento Pereira Lima ◽  
Pedro L. Oliveira
Keyword(s):  
Amino Acids ◽  
Body Weight ◽  
Aedes Aegypti ◽  
Blood Meal ◽  
Mosquito Control ◽  
Blood Feeding ◽  
Degradation Pathway ◽  
Cross Resistance ◽  
Single Meal ◽  
Neurotoxic Insecticides

AbstractBlood-sucking insects incorporate many times their body weight of blood in a single meal. As proteins are the major component of vertebrate blood, its digestion in the gut of hematophagous insects generates extremely high concentrations of free amino acids. Previous reports showed that the tyrosine degradation pathway plays an essential role in adapting these animals to blood feeding. Inhibiting 4-hydroxyphenylpyruvate dioxygenase (HPPD), the rate-limiting step of tyrosine degradation, results in the death of insects after a blood meal. Therefore, it was suggested that compounds that block the catabolism of tyrosine could act selectively on blood-feeding insects. Here we have evaluated the toxicity against mosquitoes of three HPPD inhibitors currently used as herbicides and in human health. Among the compounds tested, nitisinone (NTBC) proved to be more potent than mesotrione (MES) and isoxaflutole (IFT) in Aedes aegypti. NTBC was lethal to Ae. aegypti in artificial feeding assays (LD50: 4.36 µM), as well as in topical application (LD50: 0.0033 nmol/mosquito). NTBC was also lethal to Ae. aegypti populations that were resistant to neurotoxic insecticides, and it was lethal to other mosquito species (Anopheles and Culex). Therefore, HPPD inhibitors, particularly NTBC, represent promising new drugs for mosquito control. Since they only affect blood-feeding organisms, they would represent a safer and more environmentally friendly alternative to conventional neurotoxic insecticides.Author SummaryThe control of mosquitoes has been pursued in the last decades by the use of neurotoxic insecticides to prevent the spreading of dengue, zika and malaria, among other diseases. However, the selection and propagation of different mechanisms of resistance hinder the success of these compounds. New methodologies are needed for their control. Hematophagous arthropods, including mosquitoes, ingest quantities of blood that represent many times their body weight in a single meal, releasing huge amounts of amino acids during digestion. Recent studies showed that inhibition of the tyrosine catabolism pathway could be a new selective target for vector control. Thus we tested three different inhibitors of the second enzyme in the tyrosine degradation pathway as tools for mosquito control. Results showed that Nitisinone (NTBC), an inhibitor used in medicine, was the most potent of them. NTBC was lethal to Aedes aegypti when it was administered together with the blood meal and when it was topically applied. It also caused the death of Anopheles aquasalis and Culex quinquefasciatus mosquitoes, as well as field-collected Aedes populations resistant to neurotoxic insecticides, indicating that there is no cross-resistance. We discuss the possible use of NTBC as a new insecticide.

scholarly journals Factors Influencing the Vaccination Programme for Newcastle Disease in Bangladesh: Disease Outbreaks, Haemagglutination-Inhibition Titres and Production under Field Conditions

1970 ◽  
Vol 24 (2) ◽  
pp. 90-94
Author(s):  
M Rayhan Faruque ◽  
Jens P Christensen ◽  
Magne Bisgaard ◽  
Bibek Chandra Roy ◽  
Paritosh Kumar Biawas
Keyword(s):  
Body Weight ◽  
Newcastle Disease ◽  
Vaccination Programme ◽  
Egg Production ◽  
Body Weight Gain ◽  
Haemagglutination Inhibition ◽  
Primary Vaccination ◽  
The Body ◽  
Intramuscular Route ◽  
Infective Dose

The study was undertaken to examine the immune response of birds following the present Newcastle disease (ND) vaccination programme by haemagglutination-inhibition (HI) test (β-procedure) from three study regions. This study also investigated factors possibly influencing the success of the vaccination programme. Though, those three farms had followed the different vaccination schedules, but using the same ND vaccines. Haemagglutination-inhibition (HI) titres at day-old were lower in Central Poultry Farm, Mirpur than Government Poultry Farms Jamalganj, Joypurhat and Bogra. Birds of these three farms did not persist challenge at day-old, because minimum HI titre for challenge was 24. But after introduction of ND vaccines, the HI titres showed the protective level (>24). The HI titres were lower in Mirpur after introduction of ND vaccines than Joypurhat and Bogra. The EID50 of ND vaccines were determined before introduction to test the potency of vaccines. The embryo infective dose fifty (EID50) of BCRDV (ND-F strain) was 107.67 and the EID50 RDV (ND-‘M' strain) was 107.46 EID50. It was done in the specific pathogen free (SPF) embryonating chicken eggs of 9-11 days of incubation. The bird mortality (%) at three different farms was different from week 1 to week 30. The body weight gain of birds at 3 different farms was different. It was also related to hen day egg production percentage. The body weight of birds of the 3 farms was different from week 2 to week 30. The intraocular vaccination of chicks with BCRDV (ND-F strain) at day 5 or day-old followed by vaccination with RDV (ND-M strain) by intramuscular route 8 weeks after primary vaccination and also before laying revaccination with RDV (ND-M strain) by intramuscular route would be a safe and efficient vaccination schedule. Keywords: Newcastle disease (ND) virus, Vaccine, Haemagglutination-inhibition (HI) test, Embryo infective dose fifty (EID50)DOI: http://dx.doi.org/10.3329/bjm.v24i2.1250 Bangladesh J Microbiol, Volume 24, Number 2, December 2007, pp 90-94

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