• Title, Summary, Keyword: Boar

Search Result 303, Processing Time 0.045 seconds

Effects of Dehairing Methods and Sex on Pork Quality and Boar Taint Compound Levels in Tissues

  • Choi, Y.M.;Yun, Y.K.;Ryu, Y.C.;Shin, H.G.;Choe, J.H.;Nam, Y.J.;Kim, B.C.
    • Asian-Australasian Journal of Animal Sciences
    • /
    • v.20 no.10
    • /
    • pp.1618-1623
    • /
    • 2007
  • The objective of this study was to investigate the effects of dehairing methods and sex on various traits of pork quality, as well as on tissue levels of the boar taint compounds androstenone and skatole. At the early postmortem period, dehided pigs showed higher muscle pH levels (p<0.05), lower temperatures (p<0.05) and lower drip loss (p<0.001) than scalded pigs. Thus, the dehairing method can affect the early postmortem glycolytic rate and water-holding capacity. Moreover, the differences in meat quality traits between the genders were small, and not considered to have practical importance. The scalding method had only a limited effect on the androstenone content. On the other hand, the scalded entire males exhibited a lower content of skatole than the dehided entire males (p<0.01). These results appear to indicate that the heating treatment from the scalding process influenced the reduction of skatole content for the scalded entire males.

Studies on the Separation of X and Y-Chromosome bearing Spermatozoa by Sedimentation in Boar Semen (침전에 의한 돼지의 X-와 Y-정자의 분이에 관한 연구)

  • 정용기;이용빈;임경순
    • Korean Journal of Animal Reproduction
    • /
    • v.5 no.2
    • /
    • pp.49-55
    • /
    • 1981
  • This experiment was conducted to investigate the effects of temperature and time of sedimentation and dilutor on the a, pp.arance of B-body in top and bottom fractions at separation of X and Y- chromosome bearing spermatozoa in boar semen. 1. The top fraction showed higher a, pp.arence rate of B-body than the bottom. 2. Sixty minutes at 5 and 15$^{\circ}C$ and 90 min, at 25$^{\circ}C$ showed highest difference of B-body a, pp.arence rate between top and bottom fractions. The highest difference was shown in the treatments of Sg at 5$^{\circ}C$, C at 15$^{\circ}C$ and P at 25$^{\circ}C$. 3. The highest difference was shown in the treatments of 25$^{\circ}C$ and Sg for 30 min, 15$^{\circ}C$ and P for 60 min. and 25$^{\circ}C$ and P for 90 min. 4. Sixty minutes in C, P, S and Sg dilutors showed the highest difference. 5. 25$^{\circ}C$ of the temperature levels, 60 min of the time levels and P of the dilutor levels showed the highest difference. 6. The difference was given due to the individual boar.

  • PDF

EVALUATION OF BEST SEX AND ECONOMIC SLAUGHTER WEIGHT ON STANDARD FEEDING IN LARGE WHITE PIGS UNDER INDIAN CONDITIONS

  • Kumar, A.;Barsaul, C.S.
    • Asian-Australasian Journal of Animal Sciences
    • /
    • v.4 no.3
    • /
    • pp.227-230
    • /
    • 1991
  • A comparative study was conducted in total thirty six large while weaner pigs of about 15 kg body weight namely boars, barrows and gilts to evaluate best sex and economic slaughter weight with one standard ration. In 159 days study period feed consumption, growth, feed conversion ratio and carcass quality were judged in all sexes of pigs at 50, 70 and 90 kg body weight. It was noted that upto 70 kg body weight the growth in boars and gills 46.0 and 49.0 kg and feed conversion ratio 4.83 and 4.81 were superior and economical over the barrows, which were 45.5 kg and 4.95. Later on there were too many fluctuations in growth and feed conversion ratio in all sexes of pigs, which would be uneconomical. Carcass quality was also better in boars and gilts than barrows, No boar taint was noted in most of the boar carcasses. Hence it is concluded that boars and gilts can be raised upto the 70 kg body weight for economic pork production.

Effect of Antioxidant Supplementation in Freezing Extender on Porcine Sperm Viability, Motility and Reactive Oxygen Species

  • Park, Sang-Hyoun;Yu, Il-Jeoung
    • Journal of Embryo Transfer
    • /
    • v.32 no.1
    • /
    • pp.9-15
    • /
    • 2017
  • The present study was aimed to determine the effect of green tea extract (GTE) and beta-mercaptoethanol (${\beta}$-ME) supplementation in boar sperm freezing extender on sperm motility, viability and reactive oxygen species (ROS) level. Experimental groups were allocated into Lactose-egg yolk (LEY) without antioxidant (control), GTE (1,000 mg/L GTE in LEY) and ${\beta}$-ME ($50{\mu}M$ ${\beta}$-ME in LEY). Spermatozoa extended with LEY were cooled to $5^{\circ}C$ for 3 h and then kept at $5^{\circ}C$ for 30 min following dilution with LEY containing 9% glycerol and 1.5% Equex STM (final sperm concentration: $1{\times}10^8/mL$). Spermatozoa were loaded into straws and frozen in nitrogen vapor for 20 min. Following thawing at $37^{\circ}C$ for 25 sec, sperm viability and ROS level were measured using fluorescent double stain Fertility(R) and cytometry, respectively. Motility and viability of GTE supplemented-group were higher than those of control and ${\beta}$-ME without significance. ROS level in GTE group showed significantly lower than control (P < 0.05). In conclusion, GTE supplementation in boar sperm freezing extender can reduce ROS generation during freezing.

Effects of Streptozotocin, Bisphenol A and Diethylstilbestrol on Production of Reactive Oxygen Species and Lipid Peroxidation in the Boar Sperm

  • Lee, A-Sung;Lee, Sang-Hee;Lee, Seunghyung;Yang, Boo-Keun
    • Biomedical Science Letters
    • /
    • v.23 no.2
    • /
    • pp.128-132
    • /
    • 2017
  • Streptozotocin (STZ), bisphenol A (BPA), and diethylstilbestrol (DES) are known as endocrine disruptors, occurs oxidative stress in animal cells. Generally, oxidative stress induces reactive oxygen species (ROS) and lipid peroxidation of sperm and lead to decreased viability and fertility in pigs. Therefore, we investigated the influence of STZ, BPA and DES on ROS production and lipid peroxidation on boar sperm. Collected sperm were incubated with semen extender containing $10{\mu}M\;STZ$, $10{\mu}M\;BPA$ and $20{\mu}M\;DES$ for 3, 6 and 9 hours. Intracellular ROS and lipid peroxidation of sperm were analyzed by 2', 7'-dichlorofluorescein diacetate and malondialdehyde methods. The results show that, intracellular ROS was not significantly different among the all treatments, but lipid peroxidation was significantly increased in STZ group at 3 hour after incubation with boar sperm (P<0.05). These results suggest that STZ stimulates lipid peroxidation more than ROS production and may exert a negative effect on sperm fertility.

Development of Habitat Suitability Analysis Models for Wild Boar(Sus Scrofa) : A Case Study of Mt. Sulak and Mt. Jumbong (멧돼지 서식지 적합성 분석 모형 개발 -점봉산, 설악산 지역을 대상으로-)

  • 김원주;박종화;김원명
    • Spatial Information Research
    • /
    • v.6 no.2
    • /
    • pp.247-256
    • /
    • 1998
  • The objective of this research was to develop habitat suitability models for wild boar (Sus Scrafa) in Mt. Sulak National Park and Mt. Jumbong Natural Forest Reserve. The study area is covered-with climax temperate hardwood forests ot'mainly Mongolian oak ($\textit{Quercus mongolica}$), and has diverse wildlife species including wild boars. Three suitability models - summer, fall, and annual models - were developed. These models were based on slope, aspect, forest types, forest year classes, distance from streams and trails. Habitat data collected through telemetry were used for the models. The accuracy of the models was tested by comparing observed traces of wild boar in Mt. Jurnbong, and most traces were on suitable areas on the suitability maps.

  • PDF

Docking and Virtual Screening Studies for New Leads of Boar Salivary Lipocalin

  • Sung, Nack-Do;Park, Chang-Sik;Park, Hyung-Yeon;Kim, Chan-Kyung
    • Bulletin of the Korean Chemical Society
    • /
    • v.29 no.5
    • /
    • pp.959-962
    • /
    • 2008
  • We have performed FlexX docking experiments to predict the best docking poses of 5-androst-16-en-3-ol or 5-androst-16-en-3-one to Boar salivary lipocalin (SAL). Since no steroids were found inside of the binding pocket of the X-ray structure of 1GM6, we tried to find docking structures after opening the pocket using the random tweak option implemented in SYBYL. This operation allowed the ligand to enter the pocket. The best poses generated from FlexX were different from the structures reported earlier, which calculated docking poses by manual docking followed by minimization. Analysis of docking poses allowed us to identify pharmacophores. From this information, virtual screening experiments using UNITY were performed. Among six candidates, 3-(3,7-dimethyloct-6-enylamino)propane-1,2-diol (Leadquest code name: 5755) was chosen for further development. Future work will involve synthesis of some derivatives of 5755 and biological experiments if any derivatives can control the biostimulation and improve reproductive efficiency in pigs.

Isolation of Bacillus atrophaeus MPL-01 from A Wild Boar and Characterization of Its Antifungal Activity (멧돼지 대장으로부터 Bacillus atrophaeus MPL-01의 분리 및 항진균 활성의 특성)

  • Yun, Sung-Jo;Rho, Jae-Young
    • Korean Journal of Microbiology
    • /
    • v.49 no.2
    • /
    • pp.195-199
    • /
    • 2013
  • A bacterial strain MPL-01 was isolated from the large intestine of a wild boar. The strain was shown to have morphological, physiological and biochemical characteristics, fatty acids composition typical of Bacillus. The 16S rRNA gene sequence showed that the isolate formed distinct phyletic line that was most closely related to this of Bacillus atrophaeus (99.99%). It was proposed that the strain is classified as B. atrophaeus MPL-01. The strain MPL-01 exhibited the strongest antifungal activity against Colletotrichum acutatum, the pathogen of anthracnose of chili peppers. The ethyl acetate extract of culture filtrate possessed not only the antifungal activity but also the bio-surfactant activity. Therefore, the strain MPL-01 could be a useful bacterium in the development of bio-control process against the pathogenic fungi.

Effects of Breeds, Insemination Time, Breeding Season, Sperm Concentration on Reproductive Performance of Sows Inseminated by Liquid Boar Semen (액상정액을 이용한 인공수정시 품종, 계절, 인공수정 횟수 및 정자농도가 번식성적에 미치는 영향)

  • Kim, In-Cheul;Park, Chang-Sik;Lee, Kyu-Seung;Seo, Kil-Woong;Han, Sung-Wook
    • Korean Journal of Agricultural Science
    • /
    • v.28 no.2
    • /
    • pp.85-91
    • /
    • 2001
  • This study was carried out to investigate the effects of liquid boar semen on reproductive performance in swine artificial insemination. Many factors, which were breeds, time of insemination, breeding season, sperm per dose etc, have been tried to improve reproductive efficiency. Boars were raised at Swine Artificial Insemination Center in National Livestock Research Institute, Sunghwan, Chungnam, Korea. This experiment was carried out from 1995 to 2000. There were no differences in the fertility results compared with 3 breeds (Landrace, Yorkshire and Duroc), frequencies of artificial insemination (double and triple) per estrus cycle and different seasons by using liquid boar semen. There were no significant differences in conception rate, farrowing rate and litter size using 4 trials of 3.0, 2.5, 2.0 and $1.5{\times}10^9/80ml$ in liquid boar semen with 70% of motile sperm cells. We confirmed that the sperm number per dose of $1.5{\times}10^9/80ml$ could be used for commercial artificial insemination.

  • PDF

Effect of Packing Materials of Frozen Boar Semen on Sperm Characteristics and Reproductive Performance (동결정액 포장방법이 돼지정액의 성상 및 번식성적에 미치는 영향)

  • 김인철;이장희;김현종;이성호;박창식
    • Korean Journal of Animal Reproduction
    • /
    • v.26 no.2
    • /
    • pp.119-124
    • /
    • 2002
  • This study was carried out to investigate the effects of packing materials of frozen boar semen to improve reproductive performance efficiency in pig. Boars were raised at Swine Artificial Insemination Center in National Livestock Research Institute, Sunghwan, Chungnam, Korea. We compared packing protocols for frozen boar semen among 5$m\ell$ maxi-straw, 5$m\ell$ cryogenic-vial, and aluminum-pack. Cryogenic-vial packing material showed similar sperm characteristics compared with maxi-straw packing material when the sperm was frozen above 15cm from liquid nitrogen and thawed at 52$^{\circ}C$ for 190 seconds. We investigated different thawing times to find out the optimal condition of freezing and thawing protocol with cryogenic-vial. Freezing above 15cm from liquid nitrogen and thawing at 52$^{\circ}C$ for 190 seconds were the optimal protocol compared with 120 and 150 seconds. However, normal acrosome rates did not show any differences among thawing times. Post-thawing results of maxi-straw in water at 52$^{\circ}C$ for 45 seconds had better total motility and curve linear velocity than those of cryogenic-vial in water 52$^{\circ}C$ for 190 seconds. However, there were no differences on straightness and normal apical ridge of sperm between maxi-straw and cryogenic vial. Non-return rate, farrowing rate and litter size of sows inseminated with frozen boar semen of commercial farms were higher in the maxi-straw than cryogenic-vial, but there were no significant differences between maxi-straw and cryogenic-vial. In conclusion, there were no significant differences between maxi-straw and cryogenic-vial and so, we may replace cryogenic-vial packing method instead of maxi-straw packing method by improvement of freezing and thawing rate.