scholarly journals Relationships between backfat thickness and reproductive efficiency of sows: A two-year trial involving two commercial herds fixing backfat thickness at breeding

2010 ◽  
Vol 90 (3) ◽  
pp. 429-436 ◽  
Author(s):  
A A Houde ◽  
S. Méthot ◽  
B D Murphy ◽  
V. Bordignon ◽  
M F Palin
Keyword(s):  
Key Words ◽  
Reproductive Cycle ◽  
Reproductive Performance ◽  
Marked Decrease ◽  
Backfat Thickness ◽  
Reproductive Efficiency ◽  
Fat Tissue ◽  
Time Period ◽  
Long Time

In this study, we established whether controlling backfat thickness at breeding over a long time period can result in optimized reproductive performance in sows. Two commercial herds were used: herd A (322 purebred Landrace sows) and herd B (337 cross-bred Yorkshire-Landrace sows). Backfat thickness at breeding and farrowing, along with reproductive data [live Born (LB), stillborn, mummified, piglets alive at 48 h (LB48) and the weaning-to-estrus interval (WEI)] were collected over nine parities. The herd B producer was more successful in maintaining a steady backfat thickness at breeding than was the herd A producer. At breeding, the backfat thickness of sows from herd A showed a marked decrease between parities 2 and 5. During their first parity, these sows gained the least backfat during gestation and lost the most backfat during lactation. Sows from herd B had more LB and LB48 than sows from herd A. In herd A, a longer WEI was found in first and second parity sows. Our results demonstrate that maintaining backfat thickness throughout the reproductive cycle is more important than fixing this parameter at breeding alone. This is particularly true for gilts, which are prone to mobilize fat tissue reserves, a condition associated with declining reproductive performance. Key words: Backfat thickness, reproductive performance, sow, weaning-to-estrus interval

The effects of catch-up (compensatory) growth on reproductive performance of beef heifers

1996 ◽  
Vol 76 (4) ◽  
pp. 523-529 ◽  
Author(s):  
Dinah Boadi ◽  
M. A. Price
Keyword(s):  
Key Words ◽  
Reproductive Performance ◽  
Compensatory Growth ◽  
Reproductive Efficiency ◽  
Feed Restriction ◽  
Early Weaning ◽  
Beef Heifers ◽  
Catch Up ◽  
Calving Performance

Fifty-four heifer calves were allocated to five feeding/weaning treatments at birth in April/May 1990: 1) VEW (n = 11) dams feed-restricted for 3 mo before and 2 mo after calving; calves weaned in June onto gram-supplemented pasture and then into a drylot in October; 2) EW1 (n = 10) dams not restricted; calves weaned in August (unsupplemented pasture) into drylot in October; 3) EW2 (n = 10) dams not feed-restricted; calves weaned directly into drylot in August; 4) LW1 (n = 12) dams feed restricted for 3 mo before, but not after calving; calves weaned directly into drylot in October, 5) LW2 (n = 11): dams not restricted; calves weaned directly into drylot in October. The very early (VEW) and early (EW1, EW2) weaned heifers grew significantly slower than the later-weaned ones (LW1, LW2) from birth to September, and were still significantly lighter at 12–13 mo of age (May 1991). Recovery of liveweight-for-age was achieved by EW2 heifers by 18 mo and VEW and EW1 by about 23 mo of age. Early weaning treatments delayed age but not weight at first estrus (P < 0.05) yet the number of heifers conceiving and calving, and all associated reproductive data, including rebreeding success were unaffected by treatment (P > 0.05). Despite a delay in first estrus, reproductive efficiency and calving performance were not impaired by early feed restriction in heifers conceiving at 15 mo of age. Key words: Beef heifers, feed restriction, fertility, reproduction, catch-up growth

Use of tilt sensing equipment for monitoring long-term bridge movement

1991 ◽  
Vol 18 (6) ◽  
pp. 1033-1046 ◽  
Author(s):  
Terry J. Wipf
Keyword(s):  
Key Words ◽  
Reference Point ◽  
Structural Engineering ◽  
Field Tests ◽  
Measurement Instruments ◽  
Time Period ◽  
Long Time ◽  
Time Periods ◽  
Tilt Sensors

Accurate monitoring of long-term movements in bridges can be difficult primarily because of the relatively long time period over which the movements occur and inadequate instrumentation and technique. A stable reference point for measurements is difficult to obtain over these long time periods. Two bridges were monitored for long-term structural movement; the results are presented here. Instrumentation including temperature transducers and tilt sensors placed on and near piers determined the pier movement. The results of the study indicate that a superstructure expansion pier on one of the bridges monitored actually behaved as a fixed pier. The equipment used in the study, including data acquisition components and tilt sensors, proved reliable and accurate. Key words: bridges, girder, field tests, foundations, measurement instruments, piers, structural engineering.

LIMITED NURSING EFFECTS ON REPRODUCTIVE PERFORMANCE OF PRIMIPAROUS AND MULTIPAROUS COWS AND PREWEANING CALF PERFORMANCE

1987 ◽  
Vol 67 (3) ◽  
pp. 615-622 ◽  
Author(s):  
G. M. HILL ◽  
R. A. GODKE
Keyword(s):  
Key Words ◽  
Treatment Period ◽  
Reproductive Performance ◽  
Pregnancy Rates ◽  
Reproductive Efficiency ◽  
Once Daily ◽  
Beef Cow ◽  
Calf Performance ◽  
Potential Improvement ◽  
Fall Calving

Effects of limited nursing and parity of the dam on cow reproductive and calf gain performance were determined in two experiments involving 97 beef cow-calf pairs. Fall-calving (exp. 1) and spring-calving (exp. 2) primiparous (P) and multiparous (M) cows were assigned to control (C) or limited nursing (L) treatments at 21–28 d postpartum. Cows and calves continued on nursing treatments until first estrus was detected, or until 42 d had elapsed. Nursing treatment and parity of the dam influenced estrous activity in exp. 1. Higher (P < 0.05) percentages of multiparous dams and of L treatment cows were observed in estrus during the treatment period. A 5.6-d reduction (P < 0.10) in postpartum interval to first estrus (PPI) was observed for L cows observed in estrus during treatment periods, and a 16.2-d reduction (P < 0.01) occurred for L cows when all cows observed in estrus during or after the nursing treatment periods were compared to control cows in exp. 1. In exp. 2, nursing treatment and parity of the dam did not significantly affect PPI. Nursing treatments did not affect pregnancy rates in exp. 1, but M cows had higher (P < 0.01) pregnancy rates than P cows. Average daily gains (ADG) were lower (P < 0.10, exp. 1; P < 0.01, exp. 2) for L calves compared with C calves during treatment periods. The L calves did not overcome ADG reductions suffered while on the L treatment by weaning time, and 205-d adjusted weights of L calves were 25 kg lower (P < 0.05) than C calves in exp. 1. Potential improvement in reproductive efficiency resulting from limited nursing must be evaluated with regard to reduced preweaning calf performance. Key words: Cattle (beef), postpartum interval, estrus, once-daily nursing, weaning weight, first estrus

A triple Cranial Vault lesion of Hyperostosis Frontalis Interna, Osteoma and Meningioma in a Cadaveric Skull

2021 ◽  
Vol 9 (4) ◽  
pp. 8173-8178
Author(s):  
Tsoucalas G ◽  
◽  
Siozopoulos A ◽  
Vasilopoulos A ◽  
Thomaidis V ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Key Words ◽  
Cranial Vault ◽  
Northern Greece ◽  
Time Period ◽  
Long Time ◽  
Dry Bone

Cranial vault lesions are rare and may alter skull figure. Among them, osteomas are the most frequent entities found on burial remains. We present a skull (dry bone) which was unearth in the cemetery of Serres city in Northern Greece and was then donated to the Anatomy Department of the Democritus University of Thrace. The specimen presents a triple lesion and an odd figure, a reason which may explain why it was neglected for a long time period as an unwanted remain of a probably stigmatized person. Radiology (computed tomography) revealed a peculiar combination of a meningioma, an osteoma and a hyperostosis frontalis interna. KEY WORDS: Cranial Radiology, Meningioma en plaque, Hyperostosis.

scholarly journals Internet page content analysis of north European Sea ports

2020 ◽  
Vol 5 (1) ◽  
Author(s):  
Olli-Pekka Hilmola ◽  
Andres Tolli ◽  
Ain Kiisler
Keyword(s):  
Content Analysis ◽  
Environmental Issues ◽  
Basic Design ◽  
Time Period ◽  
Long Time ◽  
Sea Ports ◽  
Selection Of

Abstract This study analyses 98 Internet pages of sea ports located in Sweden, Finland and Estonia during years 2017–2019. Aim of the study is to find, how website basic design is completed (colours and languages), how slogans, environmental issues, statistics and hinterland transports are reported. Based on the analysis, it appears as rather common that sea ports follow conservative selection of colours in their websites, where blue and white are clearly most popular. Typically, English and Swedish are as the most common used language, followed by Finnish, Russian and Estonian. In some rare cases, websites are offered in Chinese or German. Larger sea ports do have clear “slogans”, where smaller ones are just having lengthy justification for their existence. Environmental issues are increasing concern among sea ports, and these are mostly mentioned in details within Swedish actors. Providing statistics varies among companies, and in some sea ports these are provided from very long time period, where in others from just previous years or then only from last year (or even at all). It is common for companies to report that they have sustainable hinterland access, railway available.

scholarly journals Effects on Synchronization and Reproductive Efficiency of Delaying the Removal of the Intravaginal Progesterone Device by 24 h in the 5d Co-synch Protocol in Heifers

Animals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 849
Author(s):  
Aitor Fernandez-Novo ◽  
Sergio Santos-Lopez ◽  
Jose Luis Pesantez-Pacheco ◽  
Natividad Pérez-Villalobos ◽  
Ana Heras-Molina ◽  
...  
Keyword(s):  
Animal Welfare ◽  
Reproductive Performance ◽  
Artificial Insemination ◽  
Fixed Time ◽  
Reproductive Efficiency ◽  
Beef Heifers ◽  
Animal Management ◽  
Commercial Farms ◽  
Beef Herds ◽  
Farm Economics

In beef herds, increasing animal welfare, improving reproductive performance and easing animal management are key goals in farm economics. We explored whether delaying the removal of the intravaginal progesterone device by 24 h in heifers synchronized with a 5d Co-synch 72-h protocol could improve reproductive efficiency of fixed-time artificial insemination (FTAI). In experiment 1, we examined the total synchronization rate (TSR) in cycling Holstein heifers. Heifers (13.4 ± 0.69 mo.) were randomly assigned to the standard 5d Co-synch 56-h protocol (5dCo56; n = 10), 5d Co-synch 72-h (5dCo72; n = 17), or the modified 5d Co-synch 72-h protocol, in which removal of the progesterone device was delayed by 24 h (6dCo48; n = 19). In experiment 2, 309 cycling beef heifers on 18 commercial farms were subjected to the 5d Co-synch 72-h or 6-d Co-synch 48-h protocol and conception rate (CR) studied. In experiment 1, the three protocols led no differences on TSRs of 80.0% (5dCo56), 88.2% (5dCo72), and 89.5% (6dCo48). In experiment 2, the CR from the beef heifers, observed during two consecutive reproductive seasons did not differ: 59.7% for 5dCo72 and 62.0% for 6dCo48 (p = 0.907). Therefore, delaying removal by 24 h provides satisfactory results without reducing reproductive efficiency of heifers.

Gonad morphology and gametogenesis in the deep-sea jellyfish Atolla wyvillei and Periphylla periphylla (Scyphozoa: Coronatae) collected from Cape Hatteras and the Gulf of Mexico

2009 ◽  
Vol 90 (6) ◽  
pp. 1095-1104 ◽  
Author(s):  
Cathy H. Lucas ◽  
Adam J. Reed
Keyword(s):  
Gulf Of Mexico ◽  
Gonad Development ◽  
Bell Diameter ◽  
Western Atlantic ◽  
Gonad Morphology ◽  
Time Period ◽  
Cape Hatteras ◽  
Literature Evidence ◽  
Long Time ◽  
North Western

Observations on gonad morphology and the structure of ovaries and testes of the coronate scyphozoans Atolla wyvillei and Periphylla periphylla are described based on samples collected from the Gulf of Mexico and Cape Hatteras (north-western Atlantic). In A. wyvillei, gonads of distinguishable sex were observed in medusae as small as 17 mm bell diameter (BD). Spermatogenesis occurred within follicles (average 366 × 254 μm) that were evenly distributed throughout the gonad. Oocytes in different stages of development were observed in all the females with gonads. Oocytes arise from the gastrodermis and migrate into the mesoglea to develop from early-mid to late vitellogenic oocytes characterized by a large nucleus and granular (organic-rich) cytoplasm. The largest oocytes measured were 543 μm and 263 μm from the Gulf of Mexico and Cape Hatteras respectively. Possible reasons for this difference are discussed. In P. periphylla gonads were also initially observed in medusae 17 mm BD, although not all larger medusae had obvious gonads. Unlike A. wyvillei sperm follicles were arranged in long convoluted rows normally only one follicle thick. The organization of ooytes in female P. periphylla was very similar to A. wyvillei, although the gonads were small and the number of oocytes present in each gonad very low (<22). The largest oocyte measured was 777 μm in a 53 mm BD medusa. Although medusae were collected from one time period only (September) in this study, our findings appear to be in agreement with literature evidence indicating that coronate jellyfish produce few eggs continuously over a long time period. Aspects of gonad development and gametogenesis are discussed with respect to potential differences in site productivity and species identification.

scholarly journals Development of COVID-19 vaccines utilizing gene therapy technology

2021 ◽  
Author(s):  
Hironori Nakagami
Keyword(s):  
Viral Vectors ◽  
High Efficiency ◽  
Genetic Disorders ◽  
Rapid Development ◽  
Adenovirus Vector ◽  
Phase 3 ◽  
Double Blind ◽  
Time Period ◽  
Short Period ◽  
Long Time

Abstract There is currently an outbreak of respiratory disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Coronavirus disease 2019 (COVID-19) is caused by infection with SARS-CoV-2. Individuals with COVID-19 have symptoms that are usually asymptomatic or mild in most initial cases. However, in some cases, moderate and severe symptoms have been observed with pneumonia. Many companies are developing COVID-19 vaccine candidates using different technologies that are classified into four groups (intact target viruses, proteins, viral vectors and nucleic acids). For rapid development, RNA vaccines and adenovirus vector vaccines have been urgently approved, and their injection has already started across the world. These types of vaccine technologies have been developed over more than 20 years using translational research for use against cancer or diseases caused by genetic disorders but the COVID-19 vaccines are the first licensed drugs to prevent infectious diseases using RNA vaccine technology. Although these vaccines are highly effective in preventing COVID-19 for a short period, safety and efficiency evaluations should be continuously monitored over a long time period. As the time of writing, more than 10 projects are now in phase 3 to evaluate the prevention of infection in double-blind studies. Hopefully, several projects may be approved to ensure high-efficiency and safe vaccines.

Motivation factors behind secession in the Arab states

2021 ◽  
Vol 28 ◽  
Keyword(s):  
Key Words ◽  
Ethnic Minorities ◽  
International Support ◽  
Motivation Factors ◽  
The Future ◽  
Long Time ◽  
Arab States ◽  
Political Economic

Some countries might witness movements that call for secession from the main homeland ,some had succeeded in their endeavors and others are hoping to accomplish them in the future .There are such movements in the Arab homeland which varied according to the motivations behind their wishes to disengage and the means that they used to accomplish them ,whether peaceful or by resort to violence ,which might take long time . These motives might be political, ethnical ,religious, or else . Usually there might be more than one motive behind such moves towards disengagement and secession, but the international support is the most conclusive factor in achieving such an aim , and this is what we are trying to discuss here. Key words : secession ,political, economic ,ethnic, minorities

THE ACCUMULATIVE EFFECT OF FINNSHEEP BREEDING IN CROSSBREEDING SCHEMES: REPRODUCTIVE PERFORMANCE

1988 ◽  
Vol 68 (1) ◽  
pp. 69-81 ◽  
Author(s):  
MOHAMED H. FAHMY ◽  
JACQUES J. DUFOUR
Keyword(s):  
Body Weight ◽  
Mortality Rate ◽  
Key Words ◽  
Litter Size ◽  
Reproductive Performance ◽  
Conception Rate ◽  
Ovulation Rate ◽  
Genetic Groups ◽  
Linear Regressions ◽  
Size At Birth

Reproductive performance and body weight were studied on 361 ewes, representing Finnsheep (F), DLS (a population of 1/2 Dorset, 1/4 Leicester, 1/4 Suffolk) and seven combinations ranging from 1/8 to 7/8 Finnsheep breeding. Conception rate in yearlings was 61.5% for DLS compared to 89.0% for F with the crosses being intermediate. Conception rate in older ewes was similar in the different genetic groups (avg. 94%). Ovulation rate and litter size at birth of DLS ewes were 1.72 and 1.44 lambs, which was less than half those of F ewes (3.51 and 2.86 lambs, respectively). Both traits increased progressively with an increase in F breeding in crosses and with advances in age. DLS ewes weaned 1.22 lambs compared to 2.03 lambs for F ewes and 1.84 lambs for 4/8 F ewes. The heaviest litters at weaning (31.7 kg) were raised by 4/8 F ewes, followed by 7/8 F (30.8 kg) while those raised by DLS ewes weighed 23.0 kg and F ewes 29.1 kg. Percentage of ova lost per ewe mated averaged 24% and ranged between 18% (DLS and 1/8 F) and 29% (6/8 F). About 3.6% of lambs were born dead and a further 13.8% died before weaning. Preweaning mortality rate was highest in F (22.9%) and lowest in 3/8 F (9.4%). Average kilograms of lambs weaned per ewe exposed was highest in 4/8 F (27.6 kg) followed by F (26.0 kg), whereas that of DLS was the lowest at 18.1 kg. The 4/8 F cross showed 25% heterosis in kg of lambs weaned per ewe exposed and 52.5% increase over DLS. Significant positive linear regressions were calculated for ovulation rate, litter size and preweaning mortality rate on proportion of Finnsheep breeding in crosses. The relation was quadratic for percent ova lost and lamb mortality at weaning. Yearling DLS females weighted 36 kg compared to 44 kg for F yearlings. However, at 5 yr of age DLS ewes weighed 62 kg, 5 kg heavier than F ewes. The heaviest ewes at all ages were the 4/8 F (45 kg at 1 yr, 65 kg at 5 yr). Key words: Reproduction, DLS sheep, Finnsheep, crossbreeding, heterosis, repeatabilities

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