Feeding level and dietary energy source have no effect on embryo survival in gilts, despite changes in systemic progesterone levels

2013 ◽  
Vol 53 (1) ◽  
pp. 30 ◽  
Author(s):  
R. Z. Athorn ◽  
P. Stott ◽  
E. G. Bouwman ◽  
A. C. Edwards ◽  
M. A. Blackberry ◽  
...  
Keyword(s):  
Energy Source ◽  
Dietary Energy ◽  
Embryo Survival ◽  
Luteal Function ◽  
Early Gestation ◽  
Feeding Level ◽  
Fibre Diet ◽  
Significant Difference ◽  
Effect Of Feeding ◽  
Starch Diet

This study was designed to assess the effect of feeding level and dietary energy source on luteal function, systemic progesterone concentration and embryo survival in gilts during early gestation. At Day 0 of pregnancy, 104 gilts were allocated to one of four experimental diets (LStarch: 1.2 × maintenance requirement (M) Starch diet (43.3% starch), n = 31; HStarch: 2.4 × M Starch diet (43.3% starch), n = 21; HFat: 2.4 × M Fat diet (13.5% fat), n = 23; and HFibre: 2.4 × M Fibre diet (7.2% fibre), n = 23). On Day 5 of gestation, no significant difference in circulating concentration of systemic progesterone was seen among the treatments. However, on Day 15 of pregnancy, gilts on the HStarch diet had a significantly lower concentration of systemic progesterone than did gilts on both the LStarch and HFat diets (P < 0.05; 24.8 ± 2.4 v. 32.7 ± 2.4 and 36.1 ± 2.1 ng/mL, respectively). At Day 35 of gestation, there was also a tendency for gilts on the HStarch and HFat diets to have a higher total luteal weight than for gilts on the LStarch diets (7.2 ± 0.2 and 7.1 ± 0.2 v. 6.7 ± 0.2 g (P < 0.05)). No difference in embryo survival was seen among the treatments. From the present study, we can conclude that altering feeding level and dietary energy source did not affect embryo survival, despite the fact that systemic progesterone concentrations were affected on Day 15 of gestation. Also, luteal weight was greater for those gilts on the high feeding level than for those on the low feeding level when fed the same energy source.

Effect of feeding level on luteal function and progesterone concentration in the vena cava during early pregnancy in gilts

2013 ◽  
Vol 25 (3) ◽  
pp. 531 ◽  
Author(s):  
R. Z. Athorn ◽  
P. Stott ◽  
E. G. Bouwman ◽  
T. Y. Chen ◽  
D. J. Kennaway ◽  
...  
Keyword(s):  
Early Pregnancy ◽  
Vena Cava ◽  
Progesterone Concentration ◽  
Embryo Survival ◽  
Luteal Function ◽  
Feeding Level ◽  
Survival And Development ◽  
Luteal Tissue ◽  
Effect Of Feeding

This study assessed the effect of feeding level on progesterone concentration in the caudal vena cava during early pregnancy in gilts. Twenty-four Landrace gilts were allocated to either a high (2.8±0.02) or a low (1.5±0.01kg day–1) feeding level at Day 0 of pregnancy. Serial blood samples were collected every 15min for 3h before and 3h after feeding on Days 6 and 9 of pregnancy. Embryo survival and development as well as in vitro luteal progesterone production were assessed at Day 10 of pregnancy. Progesterone concentration in the vena cava was pulsatile with gilts on the high feeding level having more pulses compared with Low gilts on Day 9 of pregnancy (P&lt;0.05). On Day 6 the number of pulses did not differ significantly between treatments; however, the average progesterone concentration in the vena cava tended to be higher in the gilts on the high feeding level (P&lt;0.10). Embryo survival at Day 10 was 92±3% for High gilts compared with 77±3% for Low gilts (P&lt;0.05). No difference in embryo development between the treatments was seen. There was no difference between treatments in in vitro secretion of progesterone by luteal tissue. In conclusion, a high plane of nutrition positively affects progesterone secretion by the ovaries in early pregnancy.

The effect of feeding level during a 12-day progesterone-priming period on the viability of embryos collected from superovulated ewes.

1993 ◽  
Vol 1993 ◽  
pp. 57-57
Author(s):  
T.G. McEvoy ◽  
J.J. Robinson ◽  
R.P. Aitken ◽  
C.E. Kyle ◽  
I.S. Robertson
Keyword(s):  
Plasma Concentration ◽  
Food Intake ◽  
Feed Intake ◽  
Inverse Relationship ◽  
Embryo Survival ◽  
Feeding Level ◽  
Priming Phase ◽  
Effect Of Feeding

Several studies have shown that the level of peri- and post-ovulatory progesterone in ewes can critically influence embryo survival (Ashworth, Sales & Wilmut, 1989; Parr, 1992). However, the effect of altering pre-ovulatory progesterone concentrations in superovulated sheep has not been fully investigated. In view of the inverse relationship between the plasma concentration of progesterone and food intake (McKelvey & Robinson, 1986; Parr, 1992), the present study was carried out to determine the effect of altering feed intake on progesterone concentrations during the pre-ovulatory priming phase and on the subsequent viability of ova collected from superovulated ewes.

Energy balance of lactating primiparous sows as affected by feeding level and dietary energy source.

2000 ◽  
Vol 78 (6) ◽  
pp. 1520 ◽  
Author(s):  
H van den Brand ◽  
M J Heetkamp ◽  
N M Soede ◽  
J W Schrama ◽  
B Kemp
Keyword(s):  
Energy Source ◽  
Energy Balance ◽  
Dietary Energy ◽  
Feeding Level

scholarly journals Latest Advances in Sow Nutrition during Early Gestation

Animals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1720
Author(s):  
Pieter Langendijk
Keyword(s):  
Feed Intake ◽  
Systemic Circulation ◽  
Embryo Survival ◽  
Luteal Function ◽  
Early Gestation ◽  
Progesterone Secretion ◽  
Luteal Tissue ◽  
High Feed ◽  
Sow Nutrition ◽  
Seasonal Infertility

In the pig, the establishment and maintenance of luteal function in early gestation is crucial to endometrial function, embryo development, and survival. The level of feed intake has a positive effect on formation of luteal tissue and progesterone secretion by the ovaries in the pre-implantation period, which is important for endometrial remodeling and secretion. These effects are independent of luteinising hormone (LH) and probably driven by metabolic cues, such as insulin and insulin-like growth factor (IGF-1), and seem to support progesterone secretion and delivery to the endometrium, the latter which occurs directly, bypassing the systemic circulation. Even after implantation, a high feed intake seems to improve embryo survival and the maintenance of pregnancy. In this stage, luteal function is LH-dependent, although normal variations in energy intake may not result in pregnancy failure, but may contribute to nutrient supply to the embryos, since in this phase uterine capacity becomes limiting. Feed incidents, however, such as unintended fasting of animals or severe competition for feed, may result in embryo or even pregnancy loss, especially in periods of seasonal infertility. Specific nutrients such as arginine have a role in the vascularisation of the placenta and can improve the uterine capacity in the period after implantation.

Temporary undernutrition during early gestation, corpora lutea morphometrics, ovarian progesterone secretion and embryo survival in gilts

2017 ◽  
Vol 29 (7) ◽  
pp. 1349 ◽  
Author(s):  
P. Langendijk ◽  
E. G. Bouwman ◽  
T. Y. Chen ◽  
R. E. Koopmanschap ◽  
N. M. Soede
Keyword(s):  
Blood Vessels ◽  
Ovarian Function ◽  
Corpora Lutea ◽  
Embryo Survival ◽  
Embryonic Survival ◽  
Luteal Function ◽  
Early Gestation ◽  
Pulsatile Secretion ◽  
Progesterone Secretion ◽  
Lh Secretion

The present study reports effects of severe undernutrition on luteal function and pregnancy in pigs. Gilts were inseminated and either fasted on Day 10 and 11 after conception (n = 11) or fully fed throughout (n = 10). Fasting did not affect LH or progesterone pulsatile secretion pattern on Day 11 in samples taken from blood vessels draining an ovary. Ultrasonographic measurements of the size of the corpora lutea did not show any effect of fasting either. However, fasted gilts had 10 to 30 % lower systemic progesterone from Day 12 through Day 15 after conception (P < 0.05). All gilts farrowed, but fasted gilts had fewer born piglets than fully fed gilts (8.8 ± 0.8 vs 10.9 ± 0.5 respectively; P < 0.05). In conclusion, fasting during embryo elongation can compromise embryonic survival by affecting ovarian function in the days after fasting, without having an immediate effect on LH secretion and progesterone output by the ovaries.

Effect of feeding level during rearing and mating strategy on performance of Swedish Yorkshire sows. 1. Growth, puberty and conception rate

1999 ◽  
Vol 68 (3) ◽  
pp. 355-363 ◽  
Author(s):  
Y. Le Cozier ◽  
E. Ringmar-Cederberg ◽  
S. Johansen ◽  
J. Y. Dourmad ◽  
M. Neil ◽  
...  
Keyword(s):  
Live Weight ◽  
The Body ◽  
Conception Rate ◽  
Backfat Thickness ◽  
Body Fatness ◽  
Feeding Level ◽  
The Third ◽  
Complete Diet ◽  
Ad Libitum ◽  
Effect Of Feeding

AbstractFrom 74 to 180 days of age, a complete diet was offered either ad libitum (AL) or at proportionately 0·8 of the observed consumption (R) to two groups of purebred Yorkshire gilts, comprising 128 and 127 animals, respectively. Half of the animals in each group was served at the first detected oestrus, and the other half at the third detected oestrus, according to a plan defined at the start of the experiment. Animals which failed to show oestrus before 240 days of age were culled.At 100 kg live weight (LW), AL gilts were younger (-20 days) and had thicker backfat (+2.3 mm) than R gilts. At the first detected oestrus, AL females were also younger (198 v. 203 days), heavier (127 v. 117 kg LW) and fatter (17·8 v. 14·7 mm backfat thickness) than R gilts. No difference between feeding treatments during rearing was observed in the percentage of females detected on heat before day 240. Seventy-three animals were culled from the start of the experiment until service, half of them (54%) failing to show oestrus. At service, LW and backfat thickness in the four treatments ranged from 117 to 148 kg LW and 14·9 to 19·7 mm, respectively. The body fatness, estimated from the ratio of backfat to LW, was higher in AL than in R gilts (0·14 and 0·12 , respectively), whereas no difference was observed between E1 and E3 gilts (0·13 on average). After the first service 15% of the gilts came back into heat but the conception rate was not affected by feeding treatment during rearing.

scholarly journals Effect of Air Heat Pump Cooling System as a Greener Energy Source on the Air Quality, Housing Environment and Growth Performance in Pig House

Atmosphere ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1474
Author(s):  
Dhanushka Rathnayake ◽  
Hong-Seok Mun ◽  
Muhammad Ammar Dilawar ◽  
Il-Byung Chung ◽  
Kwang-Woo Park ◽  
...  
Keyword(s):  
Energy Source ◽  
Air Quality ◽  
Growth Performance ◽  
Heat Pump ◽  
Cooling System ◽  
Electricity Consumption ◽  
Housing Environment ◽  
Significant Difference ◽  
Cooling Effects ◽  
Carbon Dioxide Co2

The present study examined the cooling effects of an air heat pump (AHP) system. An AHP system was installed in a pig house to compare the effects with a traditional cooling system on the growth performance, noxious gas emission, housing environment and consumption of electricity. During the 19-week experimental trial, the internal temperature in the AHP cooling system-connected pig house was significantly decreased (p < 0.05) than the conventional house. Similarly, the temperature–humidity index (THI) was significantly reduced (p < 0.05) in the growing and late finishing period. The carbon dioxide (CO2) and electricity consumption were also reduced significantly in the AHP cooling system relative to the control. The concentration of ammonia (NH3) during the weaning and finishing phase and the concentration of hydrogen sulfide (H2S) during all periods were lower in the AHP-installed pig house (p < 0.05). From 0–19 weeks, there was no significant difference was observed (p > 0.05) in terms of the growth performance of pigs in both houses. These results show that the AHP cooling system can be implemented as an environmentally friendly renewable energy source in swine farms for sustainable pig production and better air quality without adversely affecting productivity parameters.

scholarly journals Plasma proteins of young African catfish (Clarias gariepinus, Burchell 1822).

1987 ◽  
Vol 35 (4) ◽  
pp. 521-524
Author(s):  
J.H. Boon ◽  
J.M. Smits ◽  
T. Wensing ◽  
E. Lo
Keyword(s):  
Health Status ◽  
Water Supply ◽  
Plasma Protein ◽  
Negative Correlation ◽  
Plasma Proteins ◽  
Clarias Gariepinus ◽  
Total Content ◽  
African Catfish ◽  
Feeding Level ◽  
Effect Of Feeding

The effect of feeding level and water supply on the total content of plasma protein (TPP) and fractions of these proteins (PPF) of young African catfish was studied. It was found that TPP can be divided into 4 fractions (PPF I-IV), of which PPF I is predominant. Analysis of the results showed a strong effect of feeding level on TPP and PPF I-IV. There was a positive correlation between TPP and the weights of PPF I-IV, and a negative correlation between PPF I and PPF II. The PPF I fraction might be usable as an indicator for the health status of young catfishes. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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