scholarly journals Effects of increasing standardized ileal digestible lysine during gestation on reproductive performance of gilts and sows

animal ◽  
2021 ◽  
Vol 15 (7) ◽  
pp. 100221
Author(s):  
Lori L. Thomas ◽  
Lauren K. Herd ◽  
Robert D. Goodband ◽  
Mike D. Tokach ◽  
Jason C. Woodworth ◽  
...  
Keyword(s):  
Reproductive Performance ◽  
Standardized Ileal Digestible Lysine

scholarly journals Effect of Increasing Dietary Aminoacid Concentration in Late Gestation on Body Condition and Reproductive Performance of Hyperprolific Sows

Animals ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 99
Author(s):  
Senén Seoane ◽  
Pasquale De Palo ◽  
José Manuel Lorenzo ◽  
Aristide Maggiolino ◽  
Pablo González ◽  
...  
Keyword(s):  
Body Condition ◽  
Reproductive Performance ◽  
Control Diet ◽  
The Body ◽  
Late Gestation ◽  
Dietary Amino Acid ◽  
Ideal Protein ◽  
Performance Results ◽  
Standardized Ileal Digestible Lysine ◽  
The Ideal

A total of 62 highly prolific Danbred sows was used to evaluate the implications of increasing dietary amino acid (AA) concentration during late gestation (from day 77 to 107 of pregnancy) on body condition and reproductive performances. Sows were assigned to one of the two treatments (n = 31, with similar number of sows in the second-, third- and fourth-cycle); control diet (containing 6 g of standardized ileal digestible lysine -SID Lys-)/kg) and high AA level (containing 10 g SID Lys/kg and following the ideal protein concept for the remaining essential AA). On day 108 of pregnancy, animals were moved to the farrowing-lactating facilities where they spent until weaning receiving a common standard lactation diet. After farrowing, litters were standardized to 13 piglets each. At 107 d of gestation, backfat depth was thicker in sows fed high AA concentration than in those fed control diet (p < 0.0001) but these significant differences disappeared at weaning (p > 0.05). Additionally, at farrowing, the litter size (p = 0.043) and weight (p = 0.017) were higher in sows fed high AA level. It can be concluded that the increase in the AA content in the feed during the last month of gestation could improve the body condition of the sows and their performance results.

scholarly journals 373 Efficiency of standardized ileal digestible lysine utilization for whole body protein retention in pregnant gilts and sows during early and mid gestation

2019 ◽  
Vol 97 (Supplement_2) ◽  
pp. 104-105
Author(s):  
Christian D Ramirez-Camba ◽  
James L Dunn ◽  
John K Htoo ◽  
Kevin J Touchette ◽  
Ryan S Samuel ◽  
...  
Keyword(s):  
Reproductive Performance ◽  
Whole Body ◽  
Simple Linear Regression ◽  
Metabolic Demand ◽  
Body Protein ◽  
Early Gestation ◽  
Protein Retention ◽  
Total Urine ◽  
Standardized Ileal Digestible Lysine ◽  
Fecal Sampling

Abstract NRC (2012) gestating sow model assumes the efficiency of AA use is constant across gestation, which may not reflect changes in metabolic demand during gestation. Efficiency of utilization is determined as the slope of the response to graded levels of test AA. Previous work reported a lack of response to graded Lys [60–90% of NRC (2012) predicted requirement] in early and mid gestation. Therefore, a study was conducted to determine efficiency of SID Lys utilization for whole body protein retention in gilts and sows during early (d 48–52) and mid (d 75–79) gestation. Four isocaloric (3,373 kcal ME/kg) and isoproteic (12.75 % CP) diets containing 40, 50, 60, and 70% of NRC (2012) model-predicted daily SID Lys requirement (10.1 and 9.3 g/d in early and mid gestation, respectively) were randomly assigned to 50 females (PIC 1050; 12 gilts, 21 Parity 1, 17 Parity 2). Dietary indispensable AA contents were set to meet 100–200% of AA:Lys ratios. Whole body nitrogen (N) retention was based on N-balance studies in early and mid gestation (7-d diet adaptation and 5 d total urine collection and grab fecal sampling). Lysine efficiency was determined by simple linear regression using PROC GLM procedure of SAS. Reproductive performance data were analyzed using PROC MIXED procedure of SAS. Reproductive performance of sows (birth weight, born alive, stillborn, and mummies) was not different by parity or diet. Whole body N and SID Lys retention increased linearly (P < 0.0001) with increasing SID Lys intake in early and mid gestation. Efficiency of Lys utilization in early gestation was 0.60, 0.46, and 0.50, and in mid gestation 0.58, 0.44, and 0.48 for gilts, parity 1, and parity 2 sows, respectively. Parity may play a greater role in efficiency of AA use than stage of gestation.

РОДСТВЕННЫЕ ГРУППЫ РЕДКИХ ПОРОД ГУСЕЙ

2019 ◽  
Keyword(s):  
Reproductive Performance ◽  
Gene Pool

ЖАРКОВА И.П., ГРИШИНА Д. С. Федеральный научный центр «Всероссийский научно-исследовательский и технологический институт птицеводства» Российской академии наук Аннотация: Авторами изучены генетические параметры хозяйственно-полезных признаков гусей (сохранность, яйценоскость, масса яиц, оплодотворенность и выводимость яиц, вывод гусят) в зависимости от их происхождения. Новизна работы заключается в том, что впервые проведен анализ закономерностей проявления репродуктивных качеств у родственных групп гусей. При сравнительном изучении 21 породы гусей установлено, что группа пород гусей, родственных между собой по общему селекционному предку, а именно китайской серой породе (1-я родословная), имеет более высокие воспроизводительные способности по сравнению с другими породами и группами пород. Полученные данные будут применяться в дальнейшей работе с целью совершенствования приемов сохранения генофонда малочисленных пород гусей. Ключевые слова: ГЕНОФОНД ПОРОД ГУСЕЙ, РОДСТВЕННЫЕ ГРУППЫ, РЕПРОДУКТИВНЫЕ КАЧЕСТВА, GENE POOL OF GEESE BREEDS, BIOGENETICALLY RELATED GROUPS OF BREEDS, REPRODUCTIVE PERFORMANCE

ПРЕРЫВИСТОЕ ОСВЕЩЕНИЕ ПОВЫШАЕТ ЭФФЕКТИВНОСТЬ ИСКУССТВЕННОГО ОСЕМЕНЕНИЯ КУР В КЛЕТКАХ

2019 ◽  
Keyword(s):  
Reproductive Performance ◽  
Artificial Insemination ◽  
Egg Production ◽  
Laying Hens ◽  
Electric Energy ◽  
Productive Performance ◽  
Feed Conversion ◽  
Scientific Center ◽  
Academy Of Sciences ◽  
Egg Fertility

Intermittent Lighting Improves the Efficiency of Artificial Insemination in Cage Housed Laying Hens Kavtarashvili A.Sh., Kolokolnikova T.N. Federal Scientific Center “All-Russian Research and Technological Poultry Institute” of Russian Academy of Sciences Omsk Agrarian Scientific Center Summary: The effects of different lighting regimes on the oviposition schedule, productive performance, and reproductive efficiency in cage housed laying hens of layer parental flock (Hisex White-R) were studied; the reasonable regime of artificial insemination (AI) under intermittent lighting is proposed. It was found that intermittent lighting regime 1L:4D:4L:1D:4L:10D compared to the constant lighting significantly alters oviposition schedule: under this regime 82.3% of all daily eggs were laid until 9 am (vs. 66.6% in control). This regime and AI at 10 am improved the productive and reproductive performance compared to control (constant lighting 16L:8D and AI at 12 am): mortality by 1.9%, egg production per initial hen by 3.8%, egg weight by 1.1%, percentage of eggs suitable for incubation by 1.9%, egg fertility by 0.9%, hatchability by 2.3%, hatch of chicks by 2.9%, feed conversion ratio (kg of feed per 10 eggs) by 5.3%, the expenses of electric energy for lighting (per 1000 eggs suitable for incubation) by 54.5%. Key words: INTERMITTENT LIGHTING, CAGE HOUSED LAYERS, ARTIFICIAL INSEMINATION (AI), OVIPOSITION SCHEDULE, AI TIMING, PRODUCTIVE PERFORMANCE, REPRODUCTIVE PERFORMANCE

REPRODUCTIVE PERFORMANCE OF HAMSTERS WITH POLYACRYLAMIDE IMPLANTS CONTAINING ETHINYLOESTRADIOL

1972 ◽  
Vol 70 (2) ◽  
pp. 385-395 ◽  
Author(s):  
B. K. Davis ◽  
I. Noske ◽  
M. C. Chang
Keyword(s):  
Reproductive Performance ◽  
Mature Female ◽  
Pregnancy Rates ◽  
List Type ◽  
Pathological Changes ◽  
Apparent Effect ◽  
Tissue Sections ◽  
Main Target

ABSTRACT Mature female hamsters bearing subcutaneous polyacrylamide (PAA) implants, with ethinyloestradiol (EO), for at least 10 days prior to mating revealed: 0.5 and 2.5 mg EO in 7% PAA significantly disturb the timing of oestrus and mating, but have no apparent effect on rate of pregnancy, ovulation and implantation. 2.5 mg EO in 20 and 40% PAA conspicuously reduces the likelihood of pregnancy, although the occurrence of oestrus and mating are affected only slightly. Fertility in these hamsters was virtually restored, judging from pregnancy rates, when they were remated 11 days, or more, following removal of their implants (37 days after implantation), but significantly more foetuses were resorbed in these litters. From tissue sections of skin and muscle at the implant site, ovary, uterus, pituitary, adrenals and liver, PAA implants, without EO, cause no overt pathological changes in the bearer. Effects characteristic of oestrogen are present when these implants contain EO, and these include a conspicuous thickening of the epidermis and dermis; haemorrhagic lesions were also noted in the maternal placenta of animals with EO implants. There is an association between reproductive performance and the rate of EO release by an implant. A 7% PAA implant with 2.5 mg EO can release most of it within 2 days, and principally influences events (oestrus and mating) that precede the main target (pregnancy) of a 20% PAA implant, which releases the steroid over the longer interval of 7 days.

Proceedings: The effect of genotype and nutrition before mating on the reproductive performance of mice

Reproduction ◽  
1974 ◽  
Vol 36 (2) ◽  
pp. 467-468 ◽  
Author(s):  
T. Truscott ◽  
M Wodzicka-Tomaszewska ◽  
S. Stephenson
Keyword(s):  
Reproductive Performance
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