Effect of light on spring breeding of mutton merino ewes

1969 ◽  
Vol 73 (2) ◽  
pp. 177-180 ◽  
Author(s):  
H. Goot
Keyword(s):  
Birth Weight ◽  
Sexual Activity ◽  
Breeding Season ◽  
Control Group ◽  
Artificial Light ◽  
Breeding Activity ◽  
Short Day ◽  
Light Group ◽  
Effect Of Light ◽  
Length Of Gestation

SUMMARYMutton Merino ewes, all of which had lambed in the preceding in-season, were divided into two groups some 30 days after lambing.The ‘light’ group was subjected, over 84 days, to a simulated decrease in daylength, achieved by first adding artificial light to the daylight and then stepping down the light at weekly intervals, from approximately 17 h, on 22 January, to natural daylength (13 ¾ h), on 20 April 1967. The control group was exposed to the normally increasing daylength.Starting on 1 March, the ewes in both groups were ‘teased’ and hand-service commenced on 20 April.The breeding activity (oestrus, ewes lambing, lambs born and twin births) as well as the length of gestation and birth weight appeared to be unaffected by the light.It would appear that the ‘short-day’ photoperiodic theory is not applicable to all breeds of sheep, and it is suggested that in sheep with a long sexual season genetic heterozygosity may be responsible for regulating the breeding season by allowing other environmental stimuli, besides light, to trigger-off sexual activity.

The effect of light on the breeding season, gestation, and birth weight of Merino sheep

1956 ◽  
Vol 7 (5) ◽  
pp. 440 ◽  
Author(s):  
NTM Yeates
Keyword(s):  
Birth Weight ◽  
Breeding Season ◽  
Length Of Day ◽  
Seasonal Fluctuations ◽  
Merino Sheep ◽  
Normal Birth ◽  
Summer Heat ◽  
Natural Breeding ◽  
Winter Time ◽  
Effect Of Light

Peppin strain Merino ewes, when running continuously with vasectomized rams, exhibit a definite seasonality in the incidence of oestrus. Although less decisively separated into seasons of quiescence and activity, the oestrous pattern resembles that of the British breeds of sheep. The pattern may be reversed by artificially reversing the seasonal trend of daylight duration. This is presumptive evidence that the natural breeding season of Merinos is regulated by seasonal fluctuations in the length of day. Though there was no evidence of it in this experiment, some Merinos are believed to commence their breeding season before the days begin to shorten. This is not necessarily irreconcilable with photoperiodic control, and such animals may represent a variant genetic type. Pregnant ewes, subjected during winter-time to a summer level of light, produced lambs of normal birth weight following a gestation of normal length. This finding helps to isolate summer heat as the factor responsible for the low birth weight sometimes reported of lambs produced out of season.

Berat Badan, Panjang Badan dan Faktor Genetik sebagai Prediktor Terjadinya Stunted pada Anak Sekolah

2017 ◽  
Vol 19 (2) ◽  
pp. 95
Author(s):  
Hetriana Leksananingsih ◽  
Slamet Iskandar ◽  
Tri Siswati
Keyword(s):  
Birth Weight ◽  
Nutritional Status ◽  
School Children ◽  
Genetic Factors ◽  
Control Group ◽  
Case Group ◽  
Normal Birth Weight ◽  
Chi Square ◽  
Normal Birth ◽  
Chi Square Test

Background: Riskesdas in 2013 showed that Yogyakarta (DIY) had a prevalence of stunted new kid in school is less than the national average, which is 14.9% (MOH, 2013). Stunted or short, is a linear growth retardation has been widely used as an indicator to measure the nutritional status of individuals and community groups. Stunted can be influenced by several factors: birth weight, birth length match and genetic factors. Objective: To determine the weight, length of low birth weight and genetic factors as predictors of the occurrence of stunted on elementary school children. Methods: The study was a case control analytic. Research sites in SD Muhammadiyah Ngijon 1 Subdistrict Moyudan. The study was conducted in May and June 2015. The subjects were school children grade 1 to grade 5 the number of cases as many as 47 children and 94 control children. With the inclusion criteria of research subjects willing to become respondents, was present at the time of the study, they have a father and mother, and exclusion criteria have no data BB and PB birth, can not stand upright. The research variables are BBL, PBL, genetic factors and TB / U at this time. Data were analyzed by chi-square test and Odd Ratio (OR) calculation. Results: In case group as much as 91.5% of normal birth weight and length of 80.9% of normal birth weight, most of the height of a normal mother and father as many as 85.1%. In the control group as much as 78.7% of normal birth weight and 61.7% were born normal body length, height mostly normal mom and dad that 96.7% of women and 90.4% normal normal father. Statistical test result is no significant correlation between height mothers with stunted incidence in school children, and the results of chi-square test P = 0.026 with value Odd Ratio (OR) of 3.9 and a range of values from 1.091 to 14.214 Cl95%. Conclusion: High maternal body of mothers can be used as predictors of the occurrence of stunted school children and mothers with stunted nutritional status have 3.9 times the risk of having children with stunted nutritional status.

A note on attainment of puberty of september-born early-maturing ewe lambs in relation to level of nutrition

1991 ◽  
Vol 53 (3) ◽  
pp. 407-409 ◽  
Author(s):  
F. Forcada ◽  
J. A. Abecia ◽  
L. Zarazaga
Keyword(s):  
Sexual Activity ◽  
Breeding Season ◽  
Ovulation Rate ◽  
Corpora Lutea ◽  
Plasma Progesterone ◽  
Ewe Lambs ◽  
Early Maturing ◽  
Age At Puberty

The attainment of puberty in September-born early-maturing ewe lambs was studied at Zaragoza (latitude 41° 40' N). Thirty twin Salz females were allocated to two groups receiving two nutrition levels after 3 months of age: high (500 g/day lucerne hay and 500 g/day concentrate) (H) and low (500 g/ day lucerne hay) (L). Oestrus was detected daily by aproned rams. Corpora lutea were counted after oestrus and plasma progesterone levels monitored each week.In the first breeding season (January to February) the percentage of females showing sexual activity (silent emulation or oestrus and ovulation) was higher in the H compared with the L group (67 and 20%; P < 0/05). Nonpubertal oestrus before the main breeding season was detected in 67% of animals. In the main breeding season and for H and L groups respectively, percentage of females showing silent ovulation before puberty was 67 and 33% and mean age at puberty extended to 319 (s.e. 4-8) and 314 (s.e. 3·7) days. Ovulation rate at puberty was 1·73 (s.e. 0·13) and 1·33 (s.e. 0·15) respectively (P < 0·05).

THE DURATION OF THE BREEDING SEASON OF FOUR BREEDS OF SHEEP

1974 ◽  
Vol 54 (3) ◽  
pp. 389-392 ◽  
Author(s):  
J. J. DUFOUR
Keyword(s):  
Sexual Activity ◽  
Breeding Season ◽  
Estrous Cycles ◽  
Progressive Decline ◽  
Daily Exposure ◽  
Almost All

Three breeds of sheep (Dorset, Leicester, and Suffolk) and a crossbred line from these breeds (DLS) were observed throughout 1 yr to determine their sexual activity by daily exposure of the ewes to vasectomized rams. The DLS and Dorset ewes exhibited their first estrus earlier in the year (P < 0.01) and stopped cycling later than the Leicester and Suffolk ewes (P < 0.01). The duration of the breeding season in the DLS ewes was 20 days (P > 0.05) longer than in the Dorsets and 70 and 115 days (P < 0.01) longer than in the Leicester and Suffolk ewes, respectively. The percentage of Dorset and DLS ewes showing one or more estrous periods increased progressively from June to reach 100% in September for both breeds. The Suffolk and Leicester ewes commenced to cycle in late August and by September almost all ewes had shown an estrous period. The progressive decline in estrous activity became evident first with the Suffolk in January, then with the Dorset and Leicester in February and with the DLS in March. The Dorset, DLS and Leicester ewes had longer estrous cycles than the Suffolk ewes. Within ewes, length of estrous cycles was highly repeatable for all breeds. False estrus and silent estrus occurred in 1.0 and 3.9% of the estrous periods, respectively. Over successive estrous cycles, length of estrous cycles increased significantly.

scholarly journals High Blood Pressure during Pregnancy is not a Protective Factor for Preterm Infants with Very Low Birth Weight. A Case-Control Study

2017 ◽  
Vol 39 (04) ◽  
pp. 155-161 ◽  
Author(s):  
Annibal Sabino ◽  
Eduardo de Souza ◽  
Ana Goulart ◽  
Adriana Lima ◽  
Nelson Sass
Keyword(s):  
Blood Pressure ◽  
Birth Weight ◽  
Low Birth Weight ◽  
Protective Factor ◽  
Case Control Study ◽  
Very Low Birth Weight ◽  
Case Control ◽  
World Health ◽  
Control Group ◽  
Control Study

Objective To evaluate whether the presence of maternal blood pressure reduces the risks of morbidity, perinatal mortality and morbidity at 24 months of age in very low birth weight infants (VLBWIs) compared with a control group. Methods A retrospective, observational, case-control study. Total 49 VLBWIs were allocated to the study group, called the maternal arterial hypertension group (AHG), and matched with 44 in the control group (CG). The infants were assessed during hospitalization and at 12 and 24 months corrected age at a specialized clinic. For the assessment of growth, the World Health Organization (WHO) Anthro software (Geneva, 2006) was used, and for the psychomotor assessment, the Denver II test was used. Results In relation to the antenatal variables, the infants of the AHG had more centralized circulation assessed by Doppler, received more corticosteroids and magnesium sulfate, and were born by cesarean section more frequently. In terms of the postnatal and in-hospital outcomes, the AHG had a higher gestational age at birth (30.7 versus 29.6 weeks) and a lower frequency of 5-minute Apgar scores of less than 7 (26.5% versus 52.3%). The CG had a higher rate of pulmonary dysplasia (30.2% versus 8.3%). There were no differences in terms of hospital mortality, complications, somatic growth and functional problems at 24 months of corrected age. Conclusion The presence of maternal hypertension, especially preeclampsia, was not a protective factor against morbidity, mortality and evolution in VLBWIs aged up to 24 months. Therefore, the clinical practice should be focused on prolonging the pregnancy for as long as possible in these conditions as well.

Effect of short term recombinant human erythropoietin (rHuEPO) therapy in the prevention of anemia of prematurity (AOP) in very low birth weight (VLBW) neonates

2013 ◽  
Vol 38 (3) ◽  
pp. 119-123 ◽  
Author(s):  
BHN Yasmeen ◽  
MAKA Chowdhury ◽  
MM Hoque ◽  
MM Hossain ◽  
R Jahan ◽  
...  
Keyword(s):  
Folic Acid ◽  
Birth Weight ◽  
Low Birth Weight ◽  
Recombinant Human Erythropoietin ◽  
Very Low Birth Weight ◽  
Controlled Trial ◽  
Control Group ◽  
Short Term ◽  
Human Erythropoietin ◽  
Anaemia Of Prematurity

Premature infants especially those with birth weight <1500 g suffer from Anaemia of prematurity (AOP) and associated problems. Erythropoietin therapy is a safe effective way to prevent and to treat anaemia of prematurity. To evaluate the effect of short term administration of recombinant human erythropoietin (rHuEPO) with iron and folic acid in very low birth weight (VLBW) neonates in the prevention of anaemia of prematurity. A randomized controlled trial was carried out at Dhaka Shishu Hospital. Sixty preterm very low birth weight (PTVLBW) babies were enrolled in this study. Thirty were assigned to rHuEPO group and 30 as control. Baseline haematologic values were estimated before administration of rHuEPO. From day 7 of life rHuEPO-200 IU/kg/dose subcutaneously every alternate day for 2 weeks was administered to rHuEPO group. All infants in both groups have received oral iron, folic acid from day 14. Clinical and haematological assessment was done at 6 and 10 weeks of life. Baseline clinical characteristics and haematologic values were almost similar in both groups. This study has shown increase in haematological values(haemoglobin and haematocrit) and reduction in the number of blood transfusions during both the 1st and 2nd follow up in rHuEPO group in comparison to control group (p<0.01). Short term rHuEPO appears to be very effective in prevention of Anaemia of prematurity. DOI: http://dx.doi.org/10.3329/bmrcb.v38i3.14340 Bangladesh Med Res Counc Bull 2012; 38(3): 119-123 (December)

Experimental Studies of Plankton Luminescence

1964 ◽  
Vol 44 (2) ◽  
pp. 435-484 ◽  
Author(s):  
A. C. Hardy ◽  
R. H. Kay
Keyword(s):  
Breeding Season ◽  
Laboratory Study ◽  
Experimental Studies ◽  
Observation Chamber ◽  
Inhibiting Effect ◽  
Main Work ◽  
Mechanical Disturbance ◽  
Meganyctiphanes Norvegica ◽  
Effect Of Light

Experimental studies of plankton luminosity have been made with specially designed photomultiplier equipment; this records (on a Servograph Recorder) the flashes given off either by a sample of plankton or by individual animals placed in a container in a dark observation chamber. The apparatus is described.Apart from preliminary laboratory records on the flashing of Beroë, Pleurobrachia and Pyrosoma, and record of the general luminosity in the sea at a depth of 62 m (made with an underwater version of the apparatus), the main work has been a laboratory study of the luminescence of dinoflagellates and of the euphausiacean Meganyctiphanes norvegica.The dinoflagellate experiments showed the inhibiting effect of light, both natural and artificial, on luminescence, and the stimulating effect of mechanical disturbance which may override the former inhibition. A rise in temperature increased luminosity and cooling reduced it. A difference in the pattern of the luminosity of plankton samples containing dinoflagellates was shown by the introduction of actively swimming animals of different kinds. The dinoflagellates in the samples were mainly Peridinium depressum, Ceratium horridum and C. tripos var. balticum.The Meganyctiphanes experiments showed a spontaneous flashing in seventeen out of twenty-seven tests and in one test the animals maintained such activity for the greater part of a 24 h period. In addition to their bright flashing, the photophores would at times keep up a dull glow for long periods (especially see the observations of F. Körte in the Appendix). Spontaneous flashing does not only occur in the breeding season as had been suggested by Mauchline (1960).

scholarly journals Effect of Oral Erythropoietin in Prevention of Anemia of Prematurity

2018 ◽  
Vol 41 (2) ◽  
pp. 101-109
Author(s):  
Md Jamshed Alam ◽  
Md Kamrul Ahsan Khan ◽  
Nazmun Nahar ◽  
Sanjoy Kumer Dey ◽  
Md A Mannan ◽  
...  
Keyword(s):  
Birth Weight ◽  
Breast Milk ◽  
Blood Transfusion ◽  
Low Birth Weight ◽  
Very Low Birth Weight ◽  
Control Group ◽  
Group Iii ◽  
Anemia Of Prematurity ◽  
The Mean ◽  
Group Ii

Introduction: Anemia of prematurity (AOP) is a common problem of very low birth weight babies. Blood transfusion is a necessity when it occurs in moderate to severe form putting the child in to the risk of transfusion related complications. Erythropoietin, a potent stimulator of hemopoesis is available in breast milk in good amount and absorbed intact under physiologic condition. In this background oral recombinant human erythropoietin (rhEPO) can be a useful alternative to its subcutaneous administration in prevention of AOP.Objective: To evaluate the efficacy of oral rhEPO in the prevention of AOP in very low birth weight (VLBW) neonates.Methods: This randomized controlled study conducted in the NICU of BSMMU over one year. Total 60 preterm (<34 weeks)VLBW (<1500g) infants were enrolled and randomly divided into Control (group-I), Oral (group-II) and Subcutaneous (group III). Experimental groups (group-II & group-III) received rhEPO 400 IU/Kg, 3 times weekly in oral and subcutaneous (S/C) route respectively and continued for 2 weeks (Total 6 doses). Therapy was initiated 14 days after birth when the baby achieved oral feeding of at least 50 ml/kg/day of breast milk. All infants received oral iron and folic acid supplementation up to 12 weeks of postnatal age. Transfusion data were recorded. Anthropometric and hematological assessments were done at 2, 4, 6 and 12 weeks of age.Results: Baseline clinical characteristics and hematological values were almost similar in all groups. Mean hemoglobin were 11.34±0.68gm/dl, 11.88±0.54gm/dl& 12.12±1.32 gm/dl, the mean hematocrit were 34.11±2.03%, 35.66±1.65% & 36.38±3.97% and the mean reticulocyte were 7.56±2.48%, 9.85±1.50% & 9.22±3.11% in the control, oral and subcutaneous group respectively and the differences are statistically significant (p<0.05).Weight gain was higher in the intervention group at 6 and 12 weeks follow up than the control group(p<0.05).Only 2 (5.25%) infants, one in each of the intervention groups required blood transfusion, compared to 6 (31.5%) infants in control group (p<0.01).Conclusion: Oral EPO is as good as subcutaneous use of EPO in stimulating erythropoesis, maintaining HCT and Hb at high level and is safe in preterm baby.Bangladesh J Child Health 2017; VOL 41 (2) :101-109

scholarly journals PENGARUH PEMBERIAN SARI TOMAT (Solanum lycopersicum L) DAN INSULIN TERHADAP KADAR GLUKOSA, KADAR LDL, KADAR KOLESTEROL DAN BERAT BADAN LAHIR TIKUS PUTIH STRAIN WISTAR (Rattus Norvegicus) BUNTING DENGAN MODEL DIABETES MELLITUS TIPE 2

2021 ◽  
Vol 5 (1) ◽  
pp. 10-23
Author(s):  
Faradea Ubaidurrohmah Savitri ◽  
◽  
Risma Andani Ayu Safitri ◽  
Wening Pangesthi Maharani ◽  
Lela Dwi Andriani ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Type 2 Diabetes ◽  
Birth Weight ◽  
Solanum Lycopersicum ◽  
The Body ◽  
Control Group ◽  
Glucose Levels ◽  
Solanum Lycopersicum L ◽  
Cholesterol Levels

Diabetes Mellitus is a chronic disease caused by abnormal working insulin, insulin secretion or both so that the body tends to have high glucose levels. Type 2 diabetes mellitus can cause elevated levels of LDL and cholesterol. Risks obtained by fetuses with type 2 diabetes can be in the form of macrosomia due to hyperglycemia and hyperinsulin in the body of the fetus. Insulin is the first choice pharmacological therapy for type 2 DM that can be given during pregnancy. Non-pharmacological therapy as recommended by the World Health Organization (WHO) on a healthy diet by increasing consumption of fruits and vegetables. Good fruit consumed for pregnant women with diabetes mellitus (DM) type 2 is tomatoes (Solanum lycopersicum L). The purpose of this study was to determine the administration of tomato extract (Solanum lycopersicum L) and insulin can affect glucose levels, LDL levels, cholesterol levels and birth weight of white wistar galur (Rattus norvegicus) pregnant women with type 2 diabetes mellitus models. experimental design using the pre post test only control group design and post test only control group design. Termination was done on the 17th day of pregnancy and then followed by measurements of LDL levels, cholesterol and birth weight. Data analysis using the One Way Anova test and Kruskal Wallis then continued with the Post Hoc test using. The results showed that there were significant differences between glucose levels, LDL levels, cholesterol levels and BW born in the insulin treatment group and the tomato juice treatment (p value = 0.00 <α = 0.05). The conclusion of giving insulin and tomato juice affects a decrease in glucose levels, LDL levels, cholesterol levels and birth weight.

scholarly journals Effect of supplemental pig milk replacer on piglet weight gain and sow backfat thickness

2015 ◽  
pp. 43-47
Author(s):  
Zsolt Győri ◽  
Péter Balogh ◽  
László Huzsvai ◽  
Gabriella Novotniné Dankó
Keyword(s):  
Weight Gain ◽  
Birth Weight ◽  
Environmental Factors ◽  
Milk Production ◽  
Milk Replacer ◽  
Control Group ◽  
Suckling Period ◽  
Liquid Milk ◽  
Period Data ◽  
Experimental Group

Sow milk production is the major factor limiting pig growth to weaning. Although the milk production of the sows incremental many environmental factors affect the actual performances. The supplemental milk replacer can be an appropriate solution to ward off disparities and try to equalize the available milk quantity to the piglets according to their appetite, to enlarge the weight of pigs at weaning, ultimately. The aim of the present study was to investigate the effects of liquid milk supplement on weight development and litter performance of the piglets during the suckling period. Data were collected from 60 farrowings, the weight of 649 piglets in a total were measured at birth, 14 days old and at weaning (28 days), respectively. In the control group (n=319) the piglets were suckled and got prestarter feed from day 10. In the experimental group (n= 330) the piglets had got liquid milk replacer in 10.71% solution, from day 10 after birth together with suckling and prestarter feed, as well. Based on the Duncan's multiple range tests, there were no significant differences in birth weight between the control and experimental group but we found significant differences between the 14 days weight and the weaning weight, subsequently. Based on the CV% of weight the experimental group became more homogenous, in contrary to the weight of the control group at the end of suckling period. The milk supplementation can be an appropriate solution to ward off disparities and to equalize the available milk quantity to the piglets according to their appetite, to enlarge and uniform the weight of pigs at weaning, ultimately.

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