scholarly journals Short-term storage of semen samples in acidic extender increases the proportion of females in pigs

2021 ◽  
Vol 17 (1) ◽  
Author(s):  
Yoo-Jin Park ◽  
Dong-Ha Shin ◽  
Won-Ki Pang ◽  
Do-Yeal Ryu ◽  
Md Saidur Rahman ◽  
...  
Keyword(s):  
Litter Size ◽  
Production Efficiency ◽  
Economic Benefits ◽  
Functional Parameters ◽  
Male Ratio ◽  
Average Litter Size ◽  
Significant Difference ◽  
General Preference ◽  
Semen Extender ◽  
Farrowing Rate

Abstract Background Sex preselection is a desired goal of the animal industry to improve production efficiency, depending on industry demand. In the porcine industry, there is a general preference for pork from female and surgically castrated male pigs. Therefore, the birth of more females than males in a litter leads to economic benefits and improved animal welfare in the pig production industry. Our previous study suggested that the porcine semen extender (BTS) adjusted to pH 6.2 maximises the differences in viability between X-chromosome-bearing (X) spermatozoa and Y-chromosome-bearing (Y) spermatozoa without affecting sperm’s functional parameters. In this study we aimed to evaluate whether the pH 6.2 extender is applicable at the farm level for increasing the number of female piglets without a decline in spermatozoa fertility. Artificial insemination (AI) was carried out with spermatozoa stored at pH 6.2 and pH 7.2 (original BTS) at day 1 and day 2 of storage. Next, the functional parameters of the spermatozoa, litter size, farrowing rate, and female-to-male ratio of offspring were determined. Results Although sperm motility decreased significantly after 2 d of storage, the viability of spermatozoa was preserved at pH 6.2 for 3 d. There was no significant difference in the farrowing rate and average litter size between the group inseminated with the spermatozoa stored in (pH 7.2) and that inseminated with spermatozoa stored in acidic BTS. The percentage of female piglets was approximately 1.5-fold higher in sows inseminated on day 1 in the pH 6.2 than in the pH 7.2 group. Furthermore, although there was no significant difference in the female-to-male ratio, the percentage of female piglets born was slightly higher in the pH 6.2 group than in the pH 7.2 group on day 2. Conclusions The method optimised in our study is simple, economical, and may enhance the number of female births without any decline in spermatozoa fertility.

scholarly journals Population validation of reproductive gene mutation loci and association with the litter size in Nubian goat

2021 ◽  
Vol 64 (2) ◽  
pp. 375-386
Author(s):  
Sanbao Zhang ◽  
Xiaotong Gao ◽  
Yuhang Jiang ◽  
Yujian Shen ◽  
Hongyue Xie ◽  
...  
Keyword(s):  
Litter Size ◽  
Production Efficiency ◽  
Economic Benefits ◽  
Sequencing Technology ◽  
Component Trait ◽  
Haplotype Blocks ◽  
Average Litter Size ◽  
Goat Population ◽  
Candidate Loci ◽  
Molecular Indicators

Abstract. Litter size is an important component trait of doe reproduction. By improving it, production efficiency and economic benefits can be significantly provided. Genetic marker-assisted selection (MAS) based on proven molecular indicators could enhance the efficacy of goat selection, as well as litter size trait. Many molecular markers have been identified that they can be used to improve litter size in different goat breeds. However, the presence and value of these markers vary among goat breeds. In the present study, we used the reported loci on other breeds of goat as candidate loci to detect whether these loci appear in this Nubian goat population; then we proceed to genotype and detect surrounding loci (50 bp) by multiplex PCR and sequencing technology. As a result, 69 mutations (59 SNPs and 10 indels) were screened out from 23 candidate genes in Nubian goat population, 12 loci were significantly associated with the litter size of first-parity individuals; 5 loci were significantly associated with the litter size of second-parity individuals; 3 loci were significantly associated with the litter size of third-parity individuals. In addition, five loci were significantly associated with the average litter size. The additive effect value of KITLG: g.18047318 G>A in first parity, KITLG: g.18152042G>A in third parity, KISS-1: g.1341674 C>G in first parity, and GHR: g.32134187G>A in second parity exceed more than 0.40, and the preponderant alleles are G, C, A and G, respectively. Further, linkage disequilibrium analysis of 21 mutation loci shows that 3 haplotype blocks are formed, and the litter size of combination type AACC in KISS-1 gene and AAGG in KITLG gene are significantly lower than that of other combinations genotype in first parity (P<0.05). These findings can provide effective candidate DNA markers for selecting superior individuals in Nubian goat breeding.

scholarly journals Production systems of swine in the rural areas of Rangamati and Khagrachari districts of Bangladesh

2012 ◽  
Vol 40 (1-2) ◽  
pp. 28-33
Author(s):  
ME Hossain ◽  
S Chakma ◽  
MM Khatun ◽  
M Hasanuzzaman ◽  
MY Miah ◽  
...  
Keyword(s):  
Birth Weight ◽  
Litter Size ◽  
Rural Areas ◽  
Economic Condition ◽  
Production Systems ◽  
Economic Benefits ◽  
Disease Prevalence ◽  
Pig Production ◽  
Average Litter Size ◽  
The Mean

The study was undertaken for a period of 60 days to investigate the production systems of swine in Rangamati and Khagrachari districts, Bangladesh. Production systems, particularly housing, feeding, breeding, disease prevalence, vaccination, bio-security, marketing, socio-economic condition and constraints of pig production were investigated during the study period. It was found that the propensity of rearing pig differed significantly (P<0.01) among the pig owners. Pigs were reared mostly by poor and landless peoples (54.7%) followed by marginal (32.1%), medium (9.4%) and large (3.8%). Rearing systems were also different (P<0.01) and the mean figures were 43.4% for free range, 24.5% for tin shed housing , 20.8% for fencing and 11.3% for girth tethering systems. The average litter size, birth weight, post-weaning weight and weaning period were 9.3, 1.72 kg, 9.0 kg and 40.8 days respectively. Prevalence of diseases differed (P<0.01) and most prevalent diseases were diarrhea (35.8%), coccidiosis (20.8%), pneumonia (17.0%) and hemorrhagic septicemia (13.2%). The economic benefits generated from farming were selling of piglets.DOI: http://dx.doi.org/10.3329/bjas.v40i1-2.10787Bang. J. Anim. Sci. 2011. 40 (1-2): 28-33

scholarly journals COMPARATIVE PERFORMANCE OF THE INDIGENOUS AND EXOTIC SOWS IN NIGERIA

2021 ◽  
Vol 6 ◽  
pp. 26-32
Author(s):  
O. A. Adebambo ◽  
A. E. Dettmers
Keyword(s):  
Body Weight ◽  
Litter Size ◽  
Milk Yield ◽  
Wet Season ◽  
Large White ◽  
Comparative Performance ◽  
Effi Ciency ◽  
Average Litter Size ◽  
Significant Difference ◽  
Positive Correlations

THE indigenous sow of Nigeria which is about half the size of the exotic large white, Landrace or crossbred pigs at maturity (60 vs 128-141kg) has an average milk yield of 75kg as compared to 130 148kg of the exotic breeds during an eight week lactation. Peak production was reached between the third and fifth weeks of lactation by the impor ted, while the native sow showed quite a slight peak but with greater persistency. For all geno types compared, milk yield was lower in the dry season (P< 0.05) than in the wet season (123 vs 134kg) and higher for sows (P < 0.05) than for gilts (135 vs 121kg). With an average litter size of 5-8 pigs, available milk per piglet was between 16kg in the Indigenous SOW and 28kg in the Landrace soWS (P < 0.05) and a significant difference (P < 0.05) in effi ciency of milk utilization by the piglets in the range of Crossbred, followed by the purebreds, the indigenous being the least efficient in relation to unit metabolic size Milk production did not differ among the genotypes. The high positive correlations (P < 0.05) between milk yield and body weight at farrow and the unit metablie size as well as between milk intake and litter size might serve as a useful tool in selection for the Nigerian Indigenous pigs as the higher body weight tend to be correlated to a higher milk yield and a correspondingly large litter size.

scholarly journals Sperm concentration on the intrauterine artificial insemination in swine

2009 ◽  
Vol 33 (6) ◽  
pp. 1671-1674
Author(s):  
Joana Miller ◽  
Ana Luísa Neves Alvarenga ◽  
Luis David Solis Murgas ◽  
Adriana Cristina da Silva ◽  
Ricardo Sales Araújo ◽  
...  
Keyword(s):  
Litter Size ◽  
Reproductive Performance ◽  
Artificial Insemination ◽  
Intrauterine Insemination ◽  
Sperm Concentration ◽  
Conception Rate ◽  
Cervical Canal ◽  
Significant Difference ◽  
Estrus Detection ◽  
Farrowing Rate

The aim of this work was to evaluate the efficiency of the intrauterine insemination (IUI) in swine, considering the conception rate, farrowing rate, litter size (alive born pigs). For the IUI, the females had been insemination at 24 and 48 hours after the estrus detection, and the inseminating doses of 500 million, 1 billion, 1.5 billion and 2 billion spermatozoa in 20 mL extender had been used. The procedure of catheter insertion through the cervical canal was successfully performed in 97.9% of the females. The conception rate was 6.3% in the IUI. The farrowing rate in IUI was 87.2% but the farrowing rate was 100% for the sperm concentration of 500 million. Regarding the number of born pigs and alive born pigs observed in females inseminated with IUI, no significant difference was observed (p > 0.05). The concentration of 500 x 10(6) spermatozoa in 20 mL extender in the intrauterine insemination resulted in an optimal reproductive performance.

scholarly journals The impact of oestrus synchronization by hormone medication and varying numbers of artificial insemination sessions, determined by sow reproductive indices

2021 ◽  
Vol 52 (5) ◽  
Author(s):  
Jani Mavromati ◽  
Luigj Turmalaj
Keyword(s):  
Uniform Distribution ◽  
Litter Size ◽  
Artificial Insemination ◽  
Average Litter Size ◽  
Pig Farm ◽  
Synchronization Scheme ◽  
The Impact ◽  
Farrowing Rate ◽  
Reproductive Indices

This study was conducted on a central Albanian pig farm with a capacity of 80 sows. A uniform distribution of piglets born and the number of reared piglets sold every week and month was the target. To achieve this goal, a hormone-based synchronization scheme was used, combined with the use of one, two, or three artificial insemination sessions during the same oestrus. The main reproduction indices of sows were monitored, and the results indicated that the farrowing rate after the first insemination was 78.57%, 83.64% and 83.33% for the three groups in which one, two and three artificial insemination sessions were used during the same oestrus, obtained by inoculation with the hormone Sergon PG 400/200 IU. Average litter size (the number of live born piglets) per farrowing sow was 10.22 ± 0.33, 10.8 ± 0.2 and 10.6 ± 0.3 in the three groups, respectively. The fecundity index (FI) was 803, 905.8 and 883.3 in the three experimental groups of sows, respectively. A total of 1436 piglets from 136 farrowing sows were sold during 2018, achieving uniform sales of over 100 pigs per month with a weight over 90 kg. Therefore, it can be concluded that oestrus synchronization of sows with the Sergon PG 400/200 hormone can achieve a uniform distribution of piglets born and consequently a uniform distribution of piglets sales per week or month, regardless of the fact that this should be achieved at a larger scale. The best result as seen in the reproductive indicators was achieved by the use of artificial insemination with two sperm inoculations at a 12-hour interval during the same oestrus, synchronized by the Sergon PG 400/200 hormone.

Ecology of the western barred bandicoot (Perameles bougainville) (Marsupialia: Peramelidae) on Dorre and Bernier Islands, Western Australia

1998 ◽  
Vol 25 (6) ◽  
pp. 567 ◽  
Author(s):  
Jeff Short ◽  
J. D. Richards ◽  
Bruce Turner
Keyword(s):  
Sex Ratio ◽  
Litter Size ◽  
Substantial Reduction ◽  
Female Dominance ◽  
Home Ranges ◽  
Island Populations ◽  
Median Distance ◽  
Average Litter Size ◽  
Significant Difference ◽  
System Body

Population structure, reproduction, condition, movements and habitat preference were assessed for western barred bandicoots (Perameles bougainville) on Dorre and Bernier Islands over seven trapping sessions between 1988 and 1995. Data comes from 372 captures of bandicoots in 2535 trap-nights (an average of 14·7 captures per 100 trap-nights). Trap success was 5.7–25.8% on Dorre and 5.7–7.6% on Bernier. Recaptures within a trip made up 29% of bandicoot captures. The overall sex ratio (excluding recaptures) was skewed heavily towards males at 1.7: 1 for trapped animals, but varied between male and female dominance at any time according to reproductive status of females. Sex ratio of pouch young was 1.2: 1. Production of young was concentrated in the wetter winter months. The smallest western barred bandicoot with pouch young weighed 175 g. Bandicoots showed a pattern of increasing litter size with size of mother. Females with young had an average litter size of 1.8, with young reaching independence at about 100 g body weight. Large testes size relative to body size in males suggested a promiscuous mating system. Body condition could be predicted by sex (females were typically in better condition than males) and by rainfall over the previous 2 months. Some sexual dimorphism was evident, with females having longer heads and typically being heavier than males. There was no detected dimorphism between island populations. Movements of bandicoots appeared limited, with the median distance moved by animals captured more than once within a 9–11-day trapping session being 154 m. There was no significant difference in movements between the sexes, with males moving a median distance of 160 m and females 138 m within trapping sessions. The greatest movement by a male was 1020 m while the greatest distance moved by a female was 490 m. Only 13% of recorded movements were greater than 400 m. Home ranges overlapped, with 51% of traps catching more than one individual and as many as five males being caught at the same trap site. Bandicoots were widely dispersed through all habitats surveyed. Bandicoots appeared to suffer a substantial reduction in numbers on Dorre Island in a prolonged drought extending from October 1986 to April 1989, reducing overall trap success to less than 6% in the 1988 survey.

Intrauterine insemination in sows with reduced sperm number

2000 ◽  
Vol 12 (2) ◽  
pp. 113 ◽  
Author(s):  
C. Krueger ◽  
D. Rath
Keyword(s):  
Pregnancy Rate ◽  
Litter Size ◽  
Intrauterine Insemination ◽  
Uterine Horn ◽  
Sperm Cells ◽  
Sperm Number ◽  
Control Groups ◽  
Significant Difference ◽  
The Mean ◽  
Farrowing Rate

Usually 2–3 x 109 sperm per insemination are used in pigs. In other species it has been shown that changing the site of insemination allows a reduction in the amount of sperm per insemination dose. The goal of this study was to determine the minimal number of sperm that can be used, without a reduction in either the pregnancy rate or the mean litter size, using surgical deep intrauterine insemination in sows after weaning. Three different sperm concentrations (5 x 108, 1 x 108 and 1 x 107 sperm cells extended in 0.5 mL AndrohepTM) were inseminated into the tip of each uterine horn. In addition two groups of control sows were inseminated once intracervically 24–32 h after the first signs of oestrus with 1 x 109 and 3 x 109 sperm in 80 mL AndrohepTM extender. Animals that became pregnant were allowed to farrow normally. No significant differences were observed between groups inseminated surgically with the three different sperm dosages with respect to pregnancy or farrowing rate. There was also no significant difference between the results of these groups and the results obtained from the non-surgically inseminated control groups. Neither the mean number of live-born nor stillborn piglets was significantly different between the surgically inseminated groups and the control groups. The total number of piglets born in each group was also not statistically different. The data show that the sperm number to be used for surgical insemination can be lowered without loss of the fertilization potential and may be used in the field as soon as a suitable insemination device is available.

scholarly journals Freezing of rabbit semen after the addition of glycerol and dimethylsulfoxide in the extender

2018 ◽  
Vol 52 (4) ◽  
pp. 299 ◽  
Author(s):  
S. SAMOUILIDIS (Σ. ΣΑΜΟΥΗΛΙΔΗΣ) ◽  
K. SAOULIDIS (Κ. ΣΑΟΥΛΙΔΗΣ) ◽  
A. FOUKOS (Α. ΦΟΥΚΟΣ) ◽  
P. YPSILANTIS (Π. ΥΨΗΛΑΝΤΗΣ) ◽  
A. DEMERTZIS (Α. ΔΕΜΕΡΤΖΗΣ) ◽  
...  
Keyword(s):  
Litter Size ◽  
Sperm Motility ◽  
Egg Yolk ◽  
Tris Buffer ◽  
Cryoprotective Agents ◽  
Group I ◽  
Average Litter Size ◽  
Significant Difference ◽  
Group Ii ◽  
Fresh Semen

In this study, semen from 10 rabbits was frozen after it was diluted in two different extenders, A and B. Extender A consisted of Tris-buffer in which 20% of egg yolk and 3% of glycerol were added, while extender Β had the same composition, plus 3% of dimethylsulfoxide (DMSO). The semen of the buck exhibiting the best post-thaw motility in the two extenders, was used for the insemination of two corresponding groups (I and II) of 20 does each. The average sperm motility of fresh semen (77%) was significantly reduced (P<0.05) after it was frozen in the extender A (47%) and Β (54%). The post-thaw sperm motility in extender Β was significantly higher (P<0.05) than that in extender A. The percentage of the animals that gave birth in group II (60%) was increased compared to that of the animals in group I (50%), but not significantly (P>0.05). Also, no significant difference (P>0.05) was observed between the average litter size of group I (6,8±1,7) and group II (7,0±1,9). Thereafter, it is concluded that freezing rabbit semen in an extender that contains a combination of the cryoprotective agents glycerol and DMSO, in the proportion of 3% and 3%, respectively, results in a significant improvement of post-thaw sperm motility, while it doesn't affect significantly its fertility value neither the size of the litters.

scholarly journals Breeding and production performance profile of Black Bengal goats in rural areas of Mymensingh in Bangladesh

2016 ◽  
Vol 45 (2) ◽  
pp. 46-51 ◽  
Author(s):  
AFMF Islam ◽  
S Nahar ◽  
TSJ Tanni ◽  
MA Hoque ◽  
AKFH Bhuiyan
Keyword(s):  
Litter Size ◽  
Rural Areas ◽  
Color Pattern ◽  
Production Performance ◽  
Average Litter Size ◽  
Significant Difference ◽  
And Performance ◽  
Almost All ◽  
Significant Distance ◽  
Black Bengal Goat

The present study was conducted to know the breeding and performance profile of Black Bengal goat in 4 upazila (Mymensingh Sadar, Fulbaria, Trishal and Muktagacha) of Mymensingh district. The data were collected using a pre-tested questionnaire from 100 goat rearers. The questionnaire included primary information about goat owners, total number of goats, color pattern, birth information, fate of male kids, weight of kids, breeding system and source of breeding males, breeding cost, litter size, kid mortality, some management parameters on goat and goat rearing system under rural condition. On an average, goat per family at Mymensingh district was found to be 3.56 ±1.77 where the percentage of does and bucks were 90.61% and 9.39% respectively. Most of the farmers were found not to keep male kid for bad odor and difficult management and hence castrate them. Almost all farmers depend on natural mating to serve their does by passing a significant distance. The average service charge was found BDT 70.90±1.77, which differs significantly (P< 0.05) among four upazilas. No significant difference was found in performance of goats among four upazilas. The average body weight at 3 and 6 months of age of female goats were 4.67 ± 0.15 and 7.12±0.14 kg respectively. The average litter size was found 1.76±0.75 and the average kid mortality rate was 12.88% in Mymensingh district. From this study, it became evident that acute shortage of Black Bengal breeding bucks exists in the rural areas which may represent the overall situation of the country.Bang. J. Anim. Sci. 2016. 45 (2): 46-51

OPTIMAL ANALYSIS OF FARM AGRICULTURAL MACHINERY EQUIPMENT BASED ON MATHEMATICAL MODELLING

2020 ◽  
pp. 333-340
Keyword(s):  
Mathematical Modelling ◽  
Production Efficiency ◽  
Programming Model ◽  
Constraint Equation ◽  
Economic Benefits ◽  
Agricultural Machinery ◽  
Optimization Analysis ◽  
Agricultural Modernization ◽  
Actual Equipment ◽  
Optimal Allocations

With the development of science and technology, the degree of agricultural mechanization is getting higher and higher. Agricultural machinery is an important support for the development of agricultural modernization. Optimizing the allocation of agricultural machinery is conducive to improving agricultural production efficiency and economic benefits. In this paper, mathematical modelling method is mainly used in the analysis and optimization of agricultural machinery configuration. By determining the objective function and constraint equation, combined with the actual situation of Xinjiang Production and Construction Corps, the linear programming model and workload model of agricultural machinery and equipment optimization are established. Finally, the actual number of agricultural machinery and equipment and the number of optimal allocations of Xinjiang Production and Construction Corps farm were compared. The effectiveness of the optimization model is verified by comparing the optimized agricultural machinery equipment with the actual equipment. The results show that the optimized equipment model has good optimization effect. On the basis of reducing the number of agricultural machinery and equipment, the matching rate of agricultural machinery is improved, and the operation cost of agricultural machinery is effectively reduced. It is hoped that this study can provide certain reference and reference for the optimization analysis of agricultural machinery and equipment based on mathematical modelling.

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