• Asian-Australasian Journal of Animal Sciences
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• 제14권2호
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• pp.280-287
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• 2001

These studies aimed to determine how lighting might be used to improve feed intake and reduce aggressive behavior in newly weaned pigs. To examine whether this objective could be achieved an experiment was conducted to compare performance, behavior and body condition of weaners over 17-45 days, provided similar lighting quality (i.e. color temperature, color rendering index and lighting distribution) after weaning that piglets experienced prior to weaning. Triphosphor (TP) lighting to simulate daylight was provided during the day while at night, Pascal red (PR) lighting was provided to simulate the night-light piglets previously had received from infrared heating lamps. This treatment was compared to weaners provided conventional cool-white fluorescent light during the day only. Weaners on treatment lighting from 17-45 days of age showed no improvement in body weight or feed conversion at 24, 31, 38 and 45 days compared to the controls. There was, however, a significant improvement (p<0.05) in feed intake in the first week of weaning for weaners provided TP/PR lighting. Over the first 3 days of weaning, pigs on TP/PR lighting showed an increase (p<0.05) in the incidence of ear chewing but reduced (p<0.05) levels of nosing the abdomen of other pigs and reduced (p<0.05) occurrences of being stood on by other pigs. Females exhibited more (p<0.05) mounting and nosing behaviors and rubbing the heads of other pigs than males. On the other hand, males engaged in more (p<0.05) fighting, nipping, ear chewing and standing on other pigs compared to females. Pigs provided PR lighting on the first night of weaning engaged in higher (p<0.05) incidences of nosing and tail sucking behaviors, more (p<0.05) head thrusting, fighting and ear chewing compared to control pigs. The body condition of weaners provided the TP/PR lighting treatment was significantly poorer (p<0.05) compared to weaners on control lighting. In conclusion there was no improvement in production performance of weaners provided new technology lighting apart from the improvement in feed intake in the first week weaners were exposed to the TP/PR lighting.

• Asian-Australasian Journal of Animal Sciences
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• 제20권10호
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• pp.1594-1599
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• 2007

Plasma membrane proteins from pig adipocytes, brain, heart, kidney, liver and spleen were isolated using a 32% sucrose gradient. An adult male sheep was immunized three times at 3-wk intervals with the purified pig adipocyte plasma membrane (APM) proteins. Blood samples were taken from the immunized sheep 12 d after the third immunization. Antiserum showed strong reactivity with APM proteins determined by ELISA, and the reactivity could be detected at dilutions in excess of 1:128,000. Antiserum showed very low binding affinity with proteins isolated from brain, heart, kidney, liver or spleen. Ninety weanling pigs were allocated randomly to three treatment groups and were injected i.p. with 40 ml of antiserum (n = 30) or 20 ml of lyophilized antiserum (21.5 mg/ml; n = 30). A control group (n = 30) received 40 ml of saline, and all pigs were slaughtered at 24 wk of age. The polyclonal antiserum did not change BW or ADG. Carcass percentage of pigs was numerically increased by the antiserum treatment compared with control. Both antiserum treatments did not significantly (p>0.05) affect body composition, including body fat content, relative to the control group.

• Asian-Australasian Journal of Animal Sciences
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• 제12권2호
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• pp.287-294
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• 1999

Vitamin and mineral deletion from swine diets can result in reduced growth if done during the period wher muscle and bone development is occurring. Several of the vitamins and minerals decline in the serum during the starter period, suggesting a higher dietary inclusion may be necessary postweaning. Vitamin research with grower-finisher pigs is limited, but results suggest that rapidly growing lean pigs may have a higher dietary requirement for the B vitamins. Several studies have suggested that early weaning and pigs of a lean genotype may have a dietary requirement for vitamin C, CI and Cr. High dietary vitamin E levels are fortified in the diet and seems to be effective in preventing mulberry heart problems in weanling and grower pigs. Organic Se is more effectively retained in muscle tissue than inorganic Se, approximately 20% less is excreted, but the bioavailability of organic Se for glutathione peroxidase activity is only 80 to 90% to that of sodium selenite. The active form of thyroxine (T4) is dependent upon a Se containing enzyme. Withdrawal of vitamins and minerals during the latter part of the finisher period has not affected pig performance responses, but studies with poultry suggest that the vitamin content of the meat may be reduced if the vitamins are withdrawn prior to marketing. High levels of vitamin E have been shown to improve pork quality, by reducing drip loss. Studies with vitamin C and Se have suggested that they may also be involved in pork quality.

• 한국식품영양과학회지
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• 제33권10호
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• pp.1606-1610
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• 2004

본 실험은 자돈식이내 $\delta$-아미노레불린산의 첨가가 이유자돈의 성장능력 및 혈액성상에 미치는 영향을 조사하기 위하여 실시하였다. 사양시험은 3원 교잡종 자돈 75두(평균체중 7.21$\pm$0.02 kg)를 공시하였다. 시 험 설계는 1) NC(negative control; 무항생제 기초식이), 2) PC(positive control; NC diet+0.1% Apramycin+0.1% Oxytetracycline),3) ALA0.1 (NC diet+0.1% $\delta$-아미노레불린산), 4) ALA0.2(NC diet+0.2% $\delta$-아미노레불린산),5) ALA + AB (PC diet+0.2% $\delta$-아미노레불린산)의 5개 처리를 하였다. 총 사양시험기간동안, 일당증체 량은 ALA+AB 처리구가 NC 처리구와 비교하여 유의적으로 높게 평가되었으나(p<0.05), PC, ALA0.1 그리고 ALA0.2처리구와는 통계적인 차이는 보이지 않았다. 일당식 이섭취량과 식이효율에 있어서는 처리구간의 유의적 차이가 없었다. 시험 개시 후 20일령 에 측정한 영양소 소화율에 있어서는 건물과 질소 소화율에 있어서 ALA+AB처리구가 NC 처리구 및 ALA0.1 처리구와 비교하여 높게 평가되었다(p<0.05). 또한, 혈청내 total protein의 농도에 있어서는 ALA+AB처리구가 NC 처리구 및 PC 처리구와 비교하여 높게 평가되었다(p<0.05). 혈청내 iron의 농도는 $\delta$-아미노레불린산을 첨가한 처리구가 NC 및 PC 처리구에 비하여 유의적으로 높게 평가되었다(p<0.05). 혈청내 TIBC에 있어서는 ALA+AB 처리구가 NC, PC 그리고 ALA0.1 처리구와 비교하여 통계적으로 높게 평가되었다(p<0.05). 혈액내 Hb 및 HCT의 농도는 ALA0.2 처리구와 ALA+AB 처리구가 NC 처리구와 PC 처리구와 비교하여 유의적으로 높게 평가되었다(p<0.05). 혈액내 RBC와 WBC의 농도는 ALA0.2 처리구와 ALA +AB 처리구가 NC 처리구와 비교하여 유의적으로 높게 평가되었다(P<0.05). 혈액내 lymphocyte는 $\delta$-아미노레불린산 처리구가 NC 처리구와 비교하여 유의적으로 증가하였다(p<0,05). 결론적으로, 자돈식 이내 $\delta$-아미노레불린산의 첨가는 자돈의 성장 및 소화율을 향상시키며, 혈액 내 total protein, iron, hemoglobin, lymphocyte의 수준을 증가시켰다. 또한, $\delta$-아미노레불린산과 항생제의 혼합급여는 자돈의 성장 능력에 있어 상승효과를 갖는 것으로 사료된다.

• Asian-Australasian Journal of Animal Sciences
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• 제8권2호
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• pp.129-133
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• 1995

A feeding trial was conducted to evaluate the effects of crude protein concentration (44% vs 48%) and extrusion processing of soybean meal (SBM) on the performance of weanling and growing pigs. One hundred and ninety two (96 pigs of each sex) 3 way crossed (Landrace ${\times}$ Hampshire ${\times}$ Duroc) weaned pigs were allotted to 12 pens each of 16 pigs (8 pigs of each sex). Three pens were assigned to each of the 4 treatment; $T_1$; 44% SBM diet, $T_2$; extruded 44% SBM diet, $T_3$; 48% SBM diet and $T_4$; extruded 48% SBM diet. The 44% SBM diet was formulated to have 18% CP for the starter phase (5-10 wk of age) and 15% CP for the grower phase (10-15 wk of age). The other treatments used equivalent amount of each SBM, replacing the 44% SBM. Chemical assay showed that extrusion processing generally decreased amino acid content especially total lysine and available lysine. Extrusion increased Hunterlab color +a value and decreased the urease activity index. The body weight gains for the $T_3$ and $T_4$ pigs were significantly(p < 0.05) greater than for those on $T_1$ and $T_2$ for the starter phase, but not the grower phase. Extrusion processing did not improve weight gain. Feed intake for the overall period was significantly(p < 0.05) different among treatments. The feed conversion ratios were not significantly different among treatments. An economic analysis showed that the high protein (48%) SBM diet was more cost effective than the low protein(44%) SBM diet, for the starter phase.

• Asian-Australasian Journal of Animal Sciences
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• 제21권5호
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• pp.707-714
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• 2008

The experiment was conducted to evaluate the effect of ${\beta}$-1,3/1,6-glucan on growth performance, immunity and endocrine responses of weanling piglets. One hundred and eighty weanling piglets (Landrace$\times$Large White, $7.20{\pm}0.25kg$ BW and $28{\pm}2$ d of age) were randomly fed 1 of 5 treatment diets containing dietary ${\beta}$-1,3/1,6-glucan supplemented at 0, 25, 50, 100 and 200 mg/kg for 4 wks. Each treatment was replicated in 6 pens containing 6 pigs per pen. On d 14 and 28, body weight gain, feed consumption and feed efficiency were recorded as measures of growth performance. Peripheral blood lymphocyte proliferation and serum immunoglobulin G (IgG) were measured to study the effect of dietary ${\beta}$-1,3/1,6-glucan supplementation on immune function. Plasma prostaglandin E2 (PGE2), growth hormone (GH) and ghrelin were measured to investigate endocrine response to ${\beta}$-1,3/1,6-glucan supplementation. Our results suggest that average daily gain (ADG) and feed efficiency had a quadratic increase trend with dietary ${\beta}$-1,3/1,6-glucan supplementation from d 14 to 28, whereas it had no significant effect on average daily feed intake (ADFI). The treatment group fed with 50 mg/kg dietary ${\beta}$-1,3/1,6-glucan supplementation showed a numerical increase in ghrelin, a similar change trend with ADG and no significant effect on GH. Lymphocyte proliferation indices, serum IgG and plasma PGE2 concentrations varied linearly with dietary supplementation levels of ${\beta}$-1,3/1,6-glucan on d 14. Higher levels of ${\beta}$-1,3/1,6-glucan may have a transient immuno-enhancing effect on the cellular and humoral immune function of weanling piglets via decreased PGE2. Taking into account both immune response and growth performance, the most suitable dietary supplementation level of ${\beta}$-1,3/1,6-glucan is 50 mg/kg for weanling piglets.

• Asian-Australasian Journal of Animal Sciences
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• 제12권8호
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• pp.1263-1272
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• 1999

The effects of carnitine in diets with or without added fat (5% lard or soybean oil) were evaluated in 72 Large White ${\times}$ Landrace ${\times}$ Duroc pigs weaned at 35 days of age. Pigs were fed a 1.30% lysine corn-soybean basal diet+15% dried whey+4% fish meal with carnitine at 0 or 50 mg/kg and either 0% added fat, 5% soybean oil or 5% lard for 6 weeks in a $2{\times}3$ factorial trial (6 treatments, 3 pens per treatment, 4 pigs per pen). Addition of carnitine increased average daily gain (ADG) and average daily feed intake (ADFI) in the second two weeks of the six-week trial and overall, but had no significant effect on feed per gain (F/G). Lard alone depressed ADG (p<0.05) in the last two weeks of the trial and overall, but the ADG for pigs fed lard+carnitine was similar to the control. Lard reduced feed intake in the first two weeks of the trial (p<0.05). Carnitine reduced the percentage of pigs with poor (ADG<375 g/d) growth (15 vs 40%; p<0.05). The greater uniformity of growth was most evident in low-weaning-weight pigs in the second period (16 vs 62%, p<0.005). Addition of fat did not produce any positive effect on uniformity and had no interaction with carnitine on uniformity. Carnitine addition increased serum total carnitione and short-chain acyl-carnitine levels (p<0.05), but did not modify free carnitine levels. Serum carnitine levels were lower at weaning than at 14, 28, or 39 days after weaning (p<0.05). Carnitine increased serum protein levels on day 14 (p<0.05). Addition of fat in the form of soybean oil or lard did not improve piglet growth performance. Addition of 50 mg/kg of carnitine to the diet of weanling pigs enhanced postweaning performance.

• IMMUNE NETWORK
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• 제16권3호
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• pp.195-199
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• 2016

Fecal samples obtained from wild boar habitats are useful for the surveillance of diseases in wild boar populations; however, it is difficult to determine the species of origin of feces collected in natural habitats. In this study, a fecal IgA ELISA was evaluated as a method for identifying the porcine species from fecal samples. Both domestic pigs (Sus scrofa domestica) and wild boars (Sus scrofa coreanus) showed significantly higher levels of fecal IgA than other animal species. Additionally, age dependent changes in the level of Ig A in wild boars and domestic pigs were identified; Titers of Ig A were highest in suckling period and lowest in weanling period.

• Asian-Australasian Journal of Animal Sciences
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• 제19권1호
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• pp.80-85
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• 2006

Ninety six crossbred pigs (Landrace${\times}$Yorkshire${\times}$Duroc) were used to determine the effects of essential oils (Fresta F $Conc^{(R)}$) supplementation on growth performance, immune response and fecal noxious gas of weaned pigs. Treatments were 1) NC (negative control; basal diet without antibiotics), 2) PC [positive control; basal diet+CSP (CTC+Sulfathiazole+Penicillin) 0.1%], 3) NCF (basal diet+Fresta F $Conc^{(R)}$ 0.03%) and 4) PCF [basal diet+CSP (CTC+Sulfathiazole+Penicillin) 0.1%+Fresta F $Conc^{(R)}$ 0.02%]. From d 0 to 14, ADFI was increased in pigs fed PCF diet (p<0.05). From d 14 to 28, pigs fed PCF diet had greater ADG and ADFI than pigs fed NC diet (p<0.05). From d 28 to 49, ADG and ADFI in pigs fed PCF diet were higher than in pigs fed NC diet (p<0.05). Through the entire experimental period, ADG and ADFI in pigs fed PCF diet were the highest compared to pigs fed NC and PC diets (p<0.05). There was no significant difference in fecal consistency score among the treatments (p>0.05). No statistical differences (p>0.05) were found in red blood cells (RBC) counts, white blood cells (WBC) counts, lymphocyte counts, total protein and albumin. Serum IgG concentration of PCF treatment was greater than that of other treatments (p<0.05). From d 0 to 14, there was no significant difference in digestibility of dry matter and nitrogen among the treatments (p>0.05). From d 14 to 28, digestibility of dry matter in pigs fed PC, NCF and PCF diets was higher than that of pigs fed NC diet (p<0.05) and treatments with added essential oils were higher than other diets on digestibility of nitrogen (p<0.05). Also, from d 28 to 49, digestibility of nitrogen in pigs fed PCF diet was the highest among others (p<0.05). On d 14 and 28, no statistical differences (p>0.05) were found in volatile fatty acid (VFA), ammonia nitrogen ($NH_3$-N) and hydrogen sulfide ($H_2S$) concentrations among treatments. On d 49, there was no significant difference in VFA concentration among the treatments (p>0.05). $NH_3$-N concentration in pigs fed PCF diet was lower than in pigs fed other diets (p<0.05). $H_2S$ concentration in pigs fed diets with added essential oils was lower than others. In conclusion, the results suggest that the dietary addition of essential oils and antibiotics into diets for weanling pigs improved growth performance, IgG concentration and nitrogen digestibility and decreased noxious gas concentration. Essential oils can be used to partly replace antibiotics in diets for weaned pigs without negative affects on growth performance.

• Asian-Australasian Journal of Animal Sciences
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• 제18권3호
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• pp.403-408
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• 2005

This study investigated the effects of chromium propionate on growth performance, serum traits and immune response in weaned pigs. Twenty-four 4 wk-old crossbred weanling pigs (initial body weight about 9.52${\pm}$0.48 kg) were randomly allotted into one of two groups, a control group (basal diet), chromium propionate group (diet supplemented with 200 ${\mu}g$ $kg^{-1}$ (ppb) of chromium propionate). This experiment was conducted over nine weeks. Escherichia coli lipopolysaccharide (LPS) 100 ${\mu}g$ $kg^{-1}$ BW was used as the stress-inducing agent in the middle (4 wks) and final (8 wks) periods. The experimental results indicated that chromium propionate had no effect on growth performance (p>0.05). Chromium propionate supplementation reduced the percentage of LDL+VLDL (low and very low-density lipoprotein) and increased HDL (high-density lipoprotein), but did not affect other serum traits. Pigs supplemented with chromium propionate had higher antibody titers specific for sheep red blood cells (SRBC) and serum total globulin relative to the control during the final period (p<0.05). A challenge with LPS increased white blood cells in the chromium propionate group in both experimental periods (p<0.05). The chromium propionate group exhibited higher IgG and $\gamma$-globulin than the control during the middle experimental period (p<0.05). Moreover, the PHA (phytohemagglutinin) challenge result in the chromium propionate group was better than the control group (p=0.056). Greater neutrophil activity was displayed than in the control (p<0.05). This suggests that chromium propionate supplementation benefited the weaned pigs in lipoprotein and immune response.