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A M Dalin - One of the best experts on this subject based on the ideXlab platform.

  • effect of birth litter size birth parity number growth Rate backfat thickness and age at first mating of gilts on their reproductive performance as sows
    Animal Reproduction Science, 2001
    Co-Authors: P Tummaruk, N Lundeheim, S Einarsson, A M Dalin
    Abstract:

    The present study was performed to evaluate retrospectively the influence of birth litter size, birth parity number, performance test parameters (growth Rate from birth to 100 kg body weight and backfat thickness at 100 kg body weight) and age at first mating (AFM) of gilts on their reproductive performance as sows. Traits analysed included remating Rate in gilts (RRG), litter size, weaning-to-first-service interval (WSI), remating Rate in sows and Farrowing Rate (FR). Data were collected from 11 Swedish Landrace (L) and 8 Swedish Yorkshire (Y) nucleus herds and included 20 712 Farrowing records from sow parities 1–5. Sows that farrowed for the first time during 1993–1997, having complete records of performance test and AFM, were followed up to investigate their subsequent reproductive performance until their last Farrowing in 1999. Analysis of variance and multiple regression were applied to continuous data. Logistic regression was applied to categorical data. The analyses were based on the same animals and the records were split into six groups of females, i.e. gilts, primiparous sows, and sows in parities 2–5, respectively. Each additional piglet in the litter in which the gilt was born was associated with an increase of her own litter size of between 0.07 and 0.1 piglets per litter ( P< 0.001). Gilts born from sow parity 1 had a longer WSI as primiparous sows compared with gilts born from sow parity 4 (0.3 days; P< 0.05) or parity 5 (0.4 days; P< 0.01). Gilts with a higher growth Rate of up to 100 kg body weight had a larger litter size (all parities 1–5; P< 0.05), shorter WSI (all parities 1–5; P< 0.05) and higher

  • effect of birth litter size birth parity number growth Rate backfat thickness and age at first mating of gilts on their reproductive performance as sows
    Animal Reproduction Science, 2001
    Co-Authors: Padet Tummaruk, N Lundeheim, S Einarsson, A M Dalin
    Abstract:

    The present study was performed to evaluate retrospectively the influence of birth litter size, birth parity number, performance test parameters (growth Rate from birth to 100kg body weight and backfat thickness at 100kg body weight) and age at first mating (AFM) of gilts on their reproductive performance as sows. Traits analysed included remating Rate in gilts (RRG), litter size, weaning-to-first-service interval (WSI), remating Rate in sows and Farrowing Rate (FR). Data were collected from 11 Swedish Landrace (L) and 8 Swedish Yorkshire (Y) nucleus herds and included 20712 Farrowing records from sow parities 1-5. Sows that farrowed for the first time during 1993-1997, having complete records of performance test and AFM, were followed up to investigate their subsequent reproductive performance until their last Farrowing in 1999. Analysis of variance and multiple regression were applied to continuous data. Logistic regression was applied to categorical data. The analyses were based on the same animals and the records were split into six groups of females, i.e. gilts, primiparous sows, and sows in parities 2-5, respectively. Each additional piglet in the litter in which the gilt was born was associated with an increase of her own litter size of between 0.07 and 0.1 piglets per litter (P<0.001). Gilts born from sow parity 1 had a longer WSI as primiparous sows compared with gilts born from sow parity 4 (0.3 days; P<0.05) or parity 5 (0.4 days; P<0.01). Gilts with a higher growth Rate of up to 100kg body weight had a larger litter size (all parities 1-5; P<0.05), shorter WSI (all parities 1-5; P<0.05) and higher FR (parities 2 and 5; P<0.05) than gilts with a lower growth Rate. Gilts with a high backfat thickness at 100kg body weight had a shorter WSI as primiparous sows (P<0.001) compared with low backfat gilts, and 0.1 piglets per litter more as second parity sows (P<0.01). A 10 day increase in AFM resulted in an increase in litter size of about 0.1 piglet for primiparous sows (P<0.001) and a decrease (P<0.05) for sow parities 4 and 5.

  • effects of lactation length and weaning to service interval on subsequent Farrowing Rate and litter size in landrace and yorkshire sows in thailand
    Theriogenology, 2000
    Co-Authors: Wichai Tantasuparuk, N Lundeheim, A M Dalin, Annop Kunavongkrit, S Einarsson
    Abstract:

    Abstract The aim of the present study was to investigate the influence of lactation length (LL) on weaning-to-service interval (WSI), and the effect of LL and WSI on the subsequent Farrowing Rate and litter size among purebred Landrace and Yorkshire sows under tropical conditions. The variation in litter weight at weaning (LWW) was also studied. Data were analyzed from three purebred sow herds located in the central part of Thailand, including sows weaned during the period from January 1993 to December 1996. Data were analyzed with analysis of variance using SAS® software. The procedure MIXED was used for analysis of the continuous outcome variables (namely LL, LWW, WSI, number of total born and number of live born piglets). The GLIMMIX macro was used for analysis of the categorical outcome variable, Farrowing Rate (FR). In the statistical analyses, WSI was grouped into 7 groups, when it was an independent variable, as follows: 1 to 4, 5, 6, 7, 8, 9 to 10, and 11 to 21 days. Lactation length was grouped into 4 groups as follows: 17 to 24, 25 to 27, 28 to 30 and 31 to 35 days. Parities were grouped into 4 groups as follows: 1, 2, 3+4, and 5 to 8. Landrace sows had significantly higher LWW (P

  • reproductive performance of purebred swedish landrace and swedish yorkshire sows ii effect of mating type weaning to first service interval and lactation length
    Acta Agriculturae Scandinavica Section A-animal Science, 2000
    Co-Authors: Padet Tummaruk, N Lundeheim, S Einarsson, A M Dalin
    Abstract:

    The objective of this retrospective study was to investigate the effect of mating type [natural mating (NM) versus artificial insemination (AI)], weaning-to-first-service interval (WSI) and lactation length on some reproductive traits of purebred Swedish Landrace (L) and Swedish Yorkshire (Y) sows. Data analysed comprised Farrowings during the period 1994-1997 from 19 Swedish nucleus herds and included 20 275 litters from 6989 purebred sows (3598 L and 3391 Y). Analysis of variance was used for the statistical analysis of quantitative data. Logistic regression analysis was applied for binary data using the GLIMMIX macro in the SAS program. The response variables analysed were litter size, WSI, Farrowing Rate and remating Rate. Explanatory variables included in the analyses were mating type, lactation length, sow breed, boar breed, parity, herd-year combination within breed and month of the year. The effect of WSI on subsequent fertility performance (i.e. litter size, Farrowing Rate and remating Rate) was ...

Padet Tummaruk - One of the best experts on this subject based on the ideXlab platform.

  • conception Rate and litter size in multiparous sows after intrauterine insemination using frozen thawed boar semen in a commercial swine herd in thailand
    Journal of Veterinary Medical Science, 2014
    Co-Authors: Panida Chanapiwat, Emon Olanratmanee, Kampon Kaeoket, Padet Tummaruk
    Abstract:

    Nowadays, artificial insemination has been used in the swine industry worldwide. Most of the artificial insemination in pigs was performed by using extended fresh semen, while the use of frozen-thawed semen accounts for less than 1% of the artificial insemination worldwide [7]. In general, the extended fresh semen can be used immediately after being extended in the semen extender or storage at 18°C for 3–5 days depending on the type of semen extender. The main limitation of the extended fresh semen is the short timing of semen storage. Therefore, the semen cannot be transported for a long distance. This limits the chance of distributing a good genetic resource across countries. Furthermore, because the age of the boar is generally limited to 3–5 years, the use of semen from superior genetic boars is not efficient. The development of frozen semen is, therefore, established to keep the semen of superior genetic boars in the swine industry. Furthermore, the advantage of using frozen-thawed boar semen in the swine industry includes the preservation of good genetic boars that have passed the progeny test, the distribution of genetic material more rapidly than fresh semen, the increased possibility to transport semen across countries and the reduction in disease transmission among herds. These make the insemination management easier. The success of cryopreservation technology initiated after the discovery of glycerol as a cryo-protectant. However, the process of producing frozen-thawed boar semen is much more complicated than the extended fresh semen. Moreover, artificial insemination using frozen-thawed boar semen requires a higher number of sperm than the conventional artificial insemination. This is due to the fact that the sperm viability of the frozen-thawed semen is relatively low [2]. The loss of sperm was mainly due to cold shock. During the past decade, researchers are still investigating the optimal technique to increase the conception Rate and litter size of pigs using frozen-thawed boar semen [3, 4, 7, 8, 14, 22]. In practice, the intra-cervical artificial insemination in pigs with a high number (5 to 6 × 109 per dose) of frozen-thawed sperm often results in a decrease of 20 to 30% in Farrowing Rates and 2 to 3 in number of total piglets born per litter (TB) compared to extended fresh semen [8, 9]. Therefore, the use of frozen-thawed boar semen for artificial insemination in commercial swine herds is limited [3, 7]. In an attempt to obtain satisfactory fertility results using low numbers of sperm per dose, non-surgical deep insemination procedures to deposit semen into the uterine body (intra-uterine insemination) have been developed [15]. Using frozen-thawed semen, insemination outside of the optimal insemination-to-ovulation period (i.e., 4–6 hr before ovulation) significantly decreased the Farrowing Rate and TB [14]. In addition, intrauterine insemination is an insemination technique that has been developed to reduce the number of sperm per insemination dose [19]. It has been demonstRated that an approximately 3-fold reduction in the number of sperm for extended fresh semen can be used with intrauterine insemination without affecting the Farrowing Rate and TB, compared to conventional artificial insemination [19]. To our knowledge, no fertility data are available using fixed-time intrauterine insemination with frozen-thawed boar semen under field conditions in Thailand. The present study was performed to evaluate fertility results after fixed time intrauterine insemination with reduced numbers of frozen-thawed boar sperm in induced ovulating weaned sows.

  • influence of age at first estrus body weight and average daily gain of replacement gilts on their subsequent reproductive performance as sows
    Livestock Science, 2013
    Co-Authors: Atthaporn Roongsitthichai, P Cheuchuchart, S Chatwijitkul, O Chantarothai, Padet Tummaruk
    Abstract:

    The present study investigated the influence of age at first estrus, body weight, and average daily gain (ADG) of the replacement gilts on their subsequent reproductive performance as sows. In total, 4243 LandraceYorkshire F1 crossbred replacement gilts were included. They were classified according to age at first estrus, body weight at entering the breeding unit, and ADG. Reproductive performance data, including age at first insemination, age at first Farrowing, the number of total piglets born per litter (TB), the number of piglets born alive per litter (BA), Farrowing Rate, age and parity at removal, and reasons for removal were collected for 3 years. The gilts exhibited first standing estrus, entered the breeding house, and was first mated at 202.6717.7, 230.3715.0 and 236.5717.5 days of age, respectively. On average, body weight and ADG of the gilts were 139.176.0 kg and 601.7738.2 g/day, respectively. The gilts mated at r224 days of age were younger at first estrus (200.8 vs. 206.0 days, Po0.001) and had higher ADG (627.0 vs. 587.6 g/day, Po0.001) than those mated at 4 224 days of age. Gilts with a body weight 4150 kg at entering the breeding unit had a larger TB in the second parity than those with a body weight of 136-140 kg (P¼0.050). Gilts with ADG of 601-650 g/day had a larger TB in the second parity than those with ADG of 551-600 g/day (P¼0.012). The sows that were culled at parity 0 or 1 exhibited first estrus at 204.470.7 days of age, while those culled at parity Z5 exhibited first estrus at 198.97 2.1 days of age (P¼ 0.015). It could be concluded that age at first estrus, body weight, and ADG of the replacement gilts significantly influenced their subsequent reproductive performance as sows.

  • age body weight and backfat thickness at first observed oestrus in crossbred landrace yorkshire gilts seasonal variations and their influence on subsequence reproductive performance
    Animal Reproduction Science, 2007
    Co-Authors: Padet Tummaruk, Wichai Tantasuparuk, Mongkol Techakumphu, Annop Kunavongkrit
    Abstract:

    Abstract The objective of the present study was to investigate puberty attainment in crossbred Landrace×Yorkshire (LY) gilts reared under tropical conditions and their subsequent reproductive performance. This study was carried out in a 2400-sow herd over a 1-year period. A total of 696 crossbred LY replacement gilts were included. Faecal samples from 214 gilts were collected to determine the faecal progesterone profiles around the time of first oestrus. Solid-phase 125 I-radioimmunoassay was used to determine the progesterone concentrations in the faecal extract. The gilts entered the herd at an average age of 177.5±12.6 days, 95.7±10.2kg body weight (BW) and a backfat thickness (BF) of 12.0±2.9mm. On average, the gilts expressed first standing oestrus at 195 days of age, 106kg of BW and a BF of 13.0mm. The interval from entry to the gilt pool to the first observed oestrus (EOI) was 24.4±18.0 days (range 0–88 days). The hormonal profile indicated that the gilts that actually ovulated during the first observed oestrus was 34% (group A), the gilts that had ovulated before the first observed oestrus was 21% (group B) and the gilts that did not ovulate during the first observed oestrus was 45% (group C). During summer the proportion of group A gilts was significantly lower than during the winter and the rainy seasons ( P r =0.31, P r =0.47, P r =0.65, P r =0.33, P P =0.03) and between 201 and 220 days ( P =0.003). Gilts that showed first oestrus between 110.1 and 120.0kg had a larger TB and BA than gilts that showed first oestrus between 80.0 and 100.0kg ( P P P =0.02), while Farrowing Rate (FR) did not differ significantly among groups A, B and C (78.1, 76.9 and 77.6%, respectively). Gilts that farrowed in the summer had a larger TB and BA than gilts that farrowed in the winter (TB, P =0.03; BA, P =0.09) and the rainy season (TB, P =0.006; BA, P =0.003). In conclusion, LY gilts reared under tropical conditions expressed first standing oestrus at 195 days of age, 106kg BW and a BF of 13.0mm. Under field conditions, 21% of the gilts with an observed oestrus had ovulated. The proportion of gilts that showed first oestrus and ovulated normally was lowest during the summer. The age, BW and BF at first observed oestrus influenced subsequent reproductive performance over the first three parities. The mean litter size (TB and BA) in the first three parities were highest in gilts that had a first observed oestrus between 181 and 200 days with 110.1–120.0kg BW and 13.1–15.0mm BF.

  • effect of birth litter size birth parity number growth Rate backfat thickness and age at first mating of gilts on their reproductive performance as sows
    Animal Reproduction Science, 2001
    Co-Authors: Padet Tummaruk, N Lundeheim, S Einarsson, A M Dalin
    Abstract:

    The present study was performed to evaluate retrospectively the influence of birth litter size, birth parity number, performance test parameters (growth Rate from birth to 100kg body weight and backfat thickness at 100kg body weight) and age at first mating (AFM) of gilts on their reproductive performance as sows. Traits analysed included remating Rate in gilts (RRG), litter size, weaning-to-first-service interval (WSI), remating Rate in sows and Farrowing Rate (FR). Data were collected from 11 Swedish Landrace (L) and 8 Swedish Yorkshire (Y) nucleus herds and included 20712 Farrowing records from sow parities 1-5. Sows that farrowed for the first time during 1993-1997, having complete records of performance test and AFM, were followed up to investigate their subsequent reproductive performance until their last Farrowing in 1999. Analysis of variance and multiple regression were applied to continuous data. Logistic regression was applied to categorical data. The analyses were based on the same animals and the records were split into six groups of females, i.e. gilts, primiparous sows, and sows in parities 2-5, respectively. Each additional piglet in the litter in which the gilt was born was associated with an increase of her own litter size of between 0.07 and 0.1 piglets per litter (P<0.001). Gilts born from sow parity 1 had a longer WSI as primiparous sows compared with gilts born from sow parity 4 (0.3 days; P<0.05) or parity 5 (0.4 days; P<0.01). Gilts with a higher growth Rate of up to 100kg body weight had a larger litter size (all parities 1-5; P<0.05), shorter WSI (all parities 1-5; P<0.05) and higher FR (parities 2 and 5; P<0.05) than gilts with a lower growth Rate. Gilts with a high backfat thickness at 100kg body weight had a shorter WSI as primiparous sows (P<0.001) compared with low backfat gilts, and 0.1 piglets per litter more as second parity sows (P<0.01). A 10 day increase in AFM resulted in an increase in litter size of about 0.1 piglet for primiparous sows (P<0.001) and a decrease (P<0.05) for sow parities 4 and 5.

  • reproductive performance of purebred swedish landrace and swedish yorkshire sows ii effect of mating type weaning to first service interval and lactation length
    Acta Agriculturae Scandinavica Section A-animal Science, 2000
    Co-Authors: Padet Tummaruk, N Lundeheim, S Einarsson, A M Dalin
    Abstract:

    The objective of this retrospective study was to investigate the effect of mating type [natural mating (NM) versus artificial insemination (AI)], weaning-to-first-service interval (WSI) and lactation length on some reproductive traits of purebred Swedish Landrace (L) and Swedish Yorkshire (Y) sows. Data analysed comprised Farrowings during the period 1994-1997 from 19 Swedish nucleus herds and included 20 275 litters from 6989 purebred sows (3598 L and 3391 Y). Analysis of variance was used for the statistical analysis of quantitative data. Logistic regression analysis was applied for binary data using the GLIMMIX macro in the SAS program. The response variables analysed were litter size, WSI, Farrowing Rate and remating Rate. Explanatory variables included in the analyses were mating type, lactation length, sow breed, boar breed, parity, herd-year combination within breed and month of the year. The effect of WSI on subsequent fertility performance (i.e. litter size, Farrowing Rate and remating Rate) was ...

S Einarsson - One of the best experts on this subject based on the ideXlab platform.

  • effect of birth litter size birth parity number growth Rate backfat thickness and age at first mating of gilts on their reproductive performance as sows
    Animal Reproduction Science, 2001
    Co-Authors: P Tummaruk, N Lundeheim, S Einarsson, A M Dalin
    Abstract:

    The present study was performed to evaluate retrospectively the influence of birth litter size, birth parity number, performance test parameters (growth Rate from birth to 100 kg body weight and backfat thickness at 100 kg body weight) and age at first mating (AFM) of gilts on their reproductive performance as sows. Traits analysed included remating Rate in gilts (RRG), litter size, weaning-to-first-service interval (WSI), remating Rate in sows and Farrowing Rate (FR). Data were collected from 11 Swedish Landrace (L) and 8 Swedish Yorkshire (Y) nucleus herds and included 20 712 Farrowing records from sow parities 1–5. Sows that farrowed for the first time during 1993–1997, having complete records of performance test and AFM, were followed up to investigate their subsequent reproductive performance until their last Farrowing in 1999. Analysis of variance and multiple regression were applied to continuous data. Logistic regression was applied to categorical data. The analyses were based on the same animals and the records were split into six groups of females, i.e. gilts, primiparous sows, and sows in parities 2–5, respectively. Each additional piglet in the litter in which the gilt was born was associated with an increase of her own litter size of between 0.07 and 0.1 piglets per litter ( P< 0.001). Gilts born from sow parity 1 had a longer WSI as primiparous sows compared with gilts born from sow parity 4 (0.3 days; P< 0.05) or parity 5 (0.4 days; P< 0.01). Gilts with a higher growth Rate of up to 100 kg body weight had a larger litter size (all parities 1–5; P< 0.05), shorter WSI (all parities 1–5; P< 0.05) and higher

  • effect of birth litter size birth parity number growth Rate backfat thickness and age at first mating of gilts on their reproductive performance as sows
    Animal Reproduction Science, 2001
    Co-Authors: Padet Tummaruk, N Lundeheim, S Einarsson, A M Dalin
    Abstract:

    The present study was performed to evaluate retrospectively the influence of birth litter size, birth parity number, performance test parameters (growth Rate from birth to 100kg body weight and backfat thickness at 100kg body weight) and age at first mating (AFM) of gilts on their reproductive performance as sows. Traits analysed included remating Rate in gilts (RRG), litter size, weaning-to-first-service interval (WSI), remating Rate in sows and Farrowing Rate (FR). Data were collected from 11 Swedish Landrace (L) and 8 Swedish Yorkshire (Y) nucleus herds and included 20712 Farrowing records from sow parities 1-5. Sows that farrowed for the first time during 1993-1997, having complete records of performance test and AFM, were followed up to investigate their subsequent reproductive performance until their last Farrowing in 1999. Analysis of variance and multiple regression were applied to continuous data. Logistic regression was applied to categorical data. The analyses were based on the same animals and the records were split into six groups of females, i.e. gilts, primiparous sows, and sows in parities 2-5, respectively. Each additional piglet in the litter in which the gilt was born was associated with an increase of her own litter size of between 0.07 and 0.1 piglets per litter (P<0.001). Gilts born from sow parity 1 had a longer WSI as primiparous sows compared with gilts born from sow parity 4 (0.3 days; P<0.05) or parity 5 (0.4 days; P<0.01). Gilts with a higher growth Rate of up to 100kg body weight had a larger litter size (all parities 1-5; P<0.05), shorter WSI (all parities 1-5; P<0.05) and higher FR (parities 2 and 5; P<0.05) than gilts with a lower growth Rate. Gilts with a high backfat thickness at 100kg body weight had a shorter WSI as primiparous sows (P<0.001) compared with low backfat gilts, and 0.1 piglets per litter more as second parity sows (P<0.01). A 10 day increase in AFM resulted in an increase in litter size of about 0.1 piglet for primiparous sows (P<0.001) and a decrease (P<0.05) for sow parities 4 and 5.

  • effects of lactation length and weaning to service interval on subsequent Farrowing Rate and litter size in landrace and yorkshire sows in thailand
    Theriogenology, 2000
    Co-Authors: Wichai Tantasuparuk, N Lundeheim, A M Dalin, Annop Kunavongkrit, S Einarsson
    Abstract:

    Abstract The aim of the present study was to investigate the influence of lactation length (LL) on weaning-to-service interval (WSI), and the effect of LL and WSI on the subsequent Farrowing Rate and litter size among purebred Landrace and Yorkshire sows under tropical conditions. The variation in litter weight at weaning (LWW) was also studied. Data were analyzed from three purebred sow herds located in the central part of Thailand, including sows weaned during the period from January 1993 to December 1996. Data were analyzed with analysis of variance using SAS® software. The procedure MIXED was used for analysis of the continuous outcome variables (namely LL, LWW, WSI, number of total born and number of live born piglets). The GLIMMIX macro was used for analysis of the categorical outcome variable, Farrowing Rate (FR). In the statistical analyses, WSI was grouped into 7 groups, when it was an independent variable, as follows: 1 to 4, 5, 6, 7, 8, 9 to 10, and 11 to 21 days. Lactation length was grouped into 4 groups as follows: 17 to 24, 25 to 27, 28 to 30 and 31 to 35 days. Parities were grouped into 4 groups as follows: 1, 2, 3+4, and 5 to 8. Landrace sows had significantly higher LWW (P

  • reproductive performance of purebred swedish landrace and swedish yorkshire sows ii effect of mating type weaning to first service interval and lactation length
    Acta Agriculturae Scandinavica Section A-animal Science, 2000
    Co-Authors: Padet Tummaruk, N Lundeheim, S Einarsson, A M Dalin
    Abstract:

    The objective of this retrospective study was to investigate the effect of mating type [natural mating (NM) versus artificial insemination (AI)], weaning-to-first-service interval (WSI) and lactation length on some reproductive traits of purebred Swedish Landrace (L) and Swedish Yorkshire (Y) sows. Data analysed comprised Farrowings during the period 1994-1997 from 19 Swedish nucleus herds and included 20 275 litters from 6989 purebred sows (3598 L and 3391 Y). Analysis of variance was used for the statistical analysis of quantitative data. Logistic regression analysis was applied for binary data using the GLIMMIX macro in the SAS program. The response variables analysed were litter size, WSI, Farrowing Rate and remating Rate. Explanatory variables included in the analyses were mating type, lactation length, sow breed, boar breed, parity, herd-year combination within breed and month of the year. The effect of WSI on subsequent fertility performance (i.e. litter size, Farrowing Rate and remating Rate) was ...

  • reproductive performance of purebred landrace and yorkshire sows in thailand with special reference to seasonal influence and parity number
    Theriogenology, 2000
    Co-Authors: Wichai Tantasuparuk, N Lundeheim, Annop Kunavongkrit, Annemarie Dalin, S Einarsson
    Abstract:

    Abstract The purpose of this study was to analyze reproductive performance in purebred Landrace and Yorkshire sows with special reference to seasonal influence and parity number, under tropical conditions where day length is almost constant throughout the year Data from three purebred sow herds in Thailand during the period from 1993 to 1996 were analyzed The two breeds were present in all three herds The analysis comprised records of 3848 Landrace sow litters and 2033 Yorkshire sow litters The statistical models included the fixed effects of month, year, parity, breed of the sow, herd, and two-way interactions of breed-parity, breed-herd, breed-month, breed-year, parity-month, month-herd, year-herd and month-year The random effect of sow within breed was included in all models Analysis of covariance was performed to analyze the effect of temperature, humidity and heat index on number of total bora per litter (NTB), weaning to first service interval (WSI) and Farrowing Rate (FR) Landrace sows had significantly higher NTB (0 6 piglets), number of live born per litter (0 5 piglets), and average birth weight (0 13 kg) than Yorkshire sows (P

N Lundeheim - One of the best experts on this subject based on the ideXlab platform.

  • effect of birth litter size birth parity number growth Rate backfat thickness and age at first mating of gilts on their reproductive performance as sows
    Animal Reproduction Science, 2001
    Co-Authors: P Tummaruk, N Lundeheim, S Einarsson, A M Dalin
    Abstract:

    The present study was performed to evaluate retrospectively the influence of birth litter size, birth parity number, performance test parameters (growth Rate from birth to 100 kg body weight and backfat thickness at 100 kg body weight) and age at first mating (AFM) of gilts on their reproductive performance as sows. Traits analysed included remating Rate in gilts (RRG), litter size, weaning-to-first-service interval (WSI), remating Rate in sows and Farrowing Rate (FR). Data were collected from 11 Swedish Landrace (L) and 8 Swedish Yorkshire (Y) nucleus herds and included 20 712 Farrowing records from sow parities 1–5. Sows that farrowed for the first time during 1993–1997, having complete records of performance test and AFM, were followed up to investigate their subsequent reproductive performance until their last Farrowing in 1999. Analysis of variance and multiple regression were applied to continuous data. Logistic regression was applied to categorical data. The analyses were based on the same animals and the records were split into six groups of females, i.e. gilts, primiparous sows, and sows in parities 2–5, respectively. Each additional piglet in the litter in which the gilt was born was associated with an increase of her own litter size of between 0.07 and 0.1 piglets per litter ( P< 0.001). Gilts born from sow parity 1 had a longer WSI as primiparous sows compared with gilts born from sow parity 4 (0.3 days; P< 0.05) or parity 5 (0.4 days; P< 0.01). Gilts with a higher growth Rate of up to 100 kg body weight had a larger litter size (all parities 1–5; P< 0.05), shorter WSI (all parities 1–5; P< 0.05) and higher

  • effect of birth litter size birth parity number growth Rate backfat thickness and age at first mating of gilts on their reproductive performance as sows
    Animal Reproduction Science, 2001
    Co-Authors: Padet Tummaruk, N Lundeheim, S Einarsson, A M Dalin
    Abstract:

    The present study was performed to evaluate retrospectively the influence of birth litter size, birth parity number, performance test parameters (growth Rate from birth to 100kg body weight and backfat thickness at 100kg body weight) and age at first mating (AFM) of gilts on their reproductive performance as sows. Traits analysed included remating Rate in gilts (RRG), litter size, weaning-to-first-service interval (WSI), remating Rate in sows and Farrowing Rate (FR). Data were collected from 11 Swedish Landrace (L) and 8 Swedish Yorkshire (Y) nucleus herds and included 20712 Farrowing records from sow parities 1-5. Sows that farrowed for the first time during 1993-1997, having complete records of performance test and AFM, were followed up to investigate their subsequent reproductive performance until their last Farrowing in 1999. Analysis of variance and multiple regression were applied to continuous data. Logistic regression was applied to categorical data. The analyses were based on the same animals and the records were split into six groups of females, i.e. gilts, primiparous sows, and sows in parities 2-5, respectively. Each additional piglet in the litter in which the gilt was born was associated with an increase of her own litter size of between 0.07 and 0.1 piglets per litter (P<0.001). Gilts born from sow parity 1 had a longer WSI as primiparous sows compared with gilts born from sow parity 4 (0.3 days; P<0.05) or parity 5 (0.4 days; P<0.01). Gilts with a higher growth Rate of up to 100kg body weight had a larger litter size (all parities 1-5; P<0.05), shorter WSI (all parities 1-5; P<0.05) and higher FR (parities 2 and 5; P<0.05) than gilts with a lower growth Rate. Gilts with a high backfat thickness at 100kg body weight had a shorter WSI as primiparous sows (P<0.001) compared with low backfat gilts, and 0.1 piglets per litter more as second parity sows (P<0.01). A 10 day increase in AFM resulted in an increase in litter size of about 0.1 piglet for primiparous sows (P<0.001) and a decrease (P<0.05) for sow parities 4 and 5.

  • effects of lactation length and weaning to service interval on subsequent Farrowing Rate and litter size in landrace and yorkshire sows in thailand
    Theriogenology, 2000
    Co-Authors: Wichai Tantasuparuk, N Lundeheim, A M Dalin, Annop Kunavongkrit, S Einarsson
    Abstract:

    Abstract The aim of the present study was to investigate the influence of lactation length (LL) on weaning-to-service interval (WSI), and the effect of LL and WSI on the subsequent Farrowing Rate and litter size among purebred Landrace and Yorkshire sows under tropical conditions. The variation in litter weight at weaning (LWW) was also studied. Data were analyzed from three purebred sow herds located in the central part of Thailand, including sows weaned during the period from January 1993 to December 1996. Data were analyzed with analysis of variance using SAS® software. The procedure MIXED was used for analysis of the continuous outcome variables (namely LL, LWW, WSI, number of total born and number of live born piglets). The GLIMMIX macro was used for analysis of the categorical outcome variable, Farrowing Rate (FR). In the statistical analyses, WSI was grouped into 7 groups, when it was an independent variable, as follows: 1 to 4, 5, 6, 7, 8, 9 to 10, and 11 to 21 days. Lactation length was grouped into 4 groups as follows: 17 to 24, 25 to 27, 28 to 30 and 31 to 35 days. Parities were grouped into 4 groups as follows: 1, 2, 3+4, and 5 to 8. Landrace sows had significantly higher LWW (P

  • reproductive performance of purebred swedish landrace and swedish yorkshire sows ii effect of mating type weaning to first service interval and lactation length
    Acta Agriculturae Scandinavica Section A-animal Science, 2000
    Co-Authors: Padet Tummaruk, N Lundeheim, S Einarsson, A M Dalin
    Abstract:

    The objective of this retrospective study was to investigate the effect of mating type [natural mating (NM) versus artificial insemination (AI)], weaning-to-first-service interval (WSI) and lactation length on some reproductive traits of purebred Swedish Landrace (L) and Swedish Yorkshire (Y) sows. Data analysed comprised Farrowings during the period 1994-1997 from 19 Swedish nucleus herds and included 20 275 litters from 6989 purebred sows (3598 L and 3391 Y). Analysis of variance was used for the statistical analysis of quantitative data. Logistic regression analysis was applied for binary data using the GLIMMIX macro in the SAS program. The response variables analysed were litter size, WSI, Farrowing Rate and remating Rate. Explanatory variables included in the analyses were mating type, lactation length, sow breed, boar breed, parity, herd-year combination within breed and month of the year. The effect of WSI on subsequent fertility performance (i.e. litter size, Farrowing Rate and remating Rate) was ...

  • reproductive performance of purebred landrace and yorkshire sows in thailand with special reference to seasonal influence and parity number
    Theriogenology, 2000
    Co-Authors: Wichai Tantasuparuk, N Lundeheim, Annop Kunavongkrit, Annemarie Dalin, S Einarsson
    Abstract:

    Abstract The purpose of this study was to analyze reproductive performance in purebred Landrace and Yorkshire sows with special reference to seasonal influence and parity number, under tropical conditions where day length is almost constant throughout the year Data from three purebred sow herds in Thailand during the period from 1993 to 1996 were analyzed The two breeds were present in all three herds The analysis comprised records of 3848 Landrace sow litters and 2033 Yorkshire sow litters The statistical models included the fixed effects of month, year, parity, breed of the sow, herd, and two-way interactions of breed-parity, breed-herd, breed-month, breed-year, parity-month, month-herd, year-herd and month-year The random effect of sow within breed was included in all models Analysis of covariance was performed to analyze the effect of temperature, humidity and heat index on number of total bora per litter (NTB), weaning to first service interval (WSI) and Farrowing Rate (FR) Landrace sows had significantly higher NTB (0 6 piglets), number of live born per litter (0 5 piglets), and average birth weight (0 13 kg) than Yorkshire sows (P

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  • induction of an lh surge and ovulation by buserelin as receptal allows breeding of weaned sows with a single fixed time insemination
    Theriogenology, 2013
    Co-Authors: M A Driancourt, B Kemp, P Cox, S Rubion, G Harnoismilon, N M Soede
    Abstract:

    The aim of this study was to demonstRate successful breeding of sows with a single fixed-time insemination following ovulation induction by buserelin, a GnRH analogue. In a first step, the optimal dose of buserelin (6, 10, or 16 μg) injected at 77 hours after weaning was determined in weaned sows (N = 15, 11, and 12, respectively) using its ability to induce an LH surge of similar magnitude as in control sows (N = 15) and induce ovulation. In 29/38 treated sows (76%), ovulation was induced and synchronized between 32 and 44 hours after injection, and the proportion of females ovulating during this time window was similar between groups at 73%, 73%, and 83% (6, 10, or 16 μg, respectively). Interestingly, whereas ovulation of 100% multiparous sows was induced and synchronized in the 32 to 44 hours posttreatment time window, successful induction was achieved in a lower proportion of primiparous sows (50%, 50%, and 67% following 6, 10, or 16 μg, respectively), the dose effect being nonsignificant. The magnitude of the LH surge was similar between control and treated sows, irrespective of the buserelin dose injected. Neither ovulation Rate nor the number of good embryos on Day 5 postovulation differed between groups. Interestingly, the frequency of follicular cysts at slaughter was significantly affected by treatment (P < 0.05), being minimal and maximal in sows treated with 10 or 6 μg buserelin, respectively. In a second step, 419 sows from commercial herds in Spain, Germany, and France were randomly allocated to a control or treated group. The control sows were inseminated twice 12 ± 4 hours apart once estrus was detected. Treated sows received 10 μg buserelin at 86 ± 3 hours after weaning and were inseminated once 30 to 33 hours later. Farrowing Rate of treated sows (87%, 166/192) was similar to that of control sows (84.5%, 169/200). Litter size was also similar between treated and control sows (13.6 ± 3.8 vs. 13.7 ± 3.2). In multiparous sows, neither duration of lactation nor magnitude of the fat loss during lactation significantly affected treatment effects. It is concluded that ovulation of weaned multiparous sows can be tightly synchronized by buserelin (10 μg) administration at 86 hours postweaning. This allows breeding once at a fixed time following buserelin injection while maintaining reproductive performance at a level similar to that of sows bred twice during estrus.

  • progestagen supplementation during early pregnancy does not improve embryo survival in pigs
    Reproduction in Domestic Animals, 2012
    Co-Authors: N M Soede, E G Bouwman, P Langendijk, J Jourquin, I Van Der Laan, W Hazeleger, B Kemp
    Abstract:

    Progesterone supplementation during early pregnancy may increase embryo survival in pigs. The current study evaluated whether oral supplementation with an analogue of progesterone, altrenogest (ALT), affects embryo survival. A first experiment evaluated the effect of a daily 20-mg dosage of ALT during days 1–4 or 2–4 after onset of oestrus on embryo survival at day 42 of pregnancy. A control group (CTR1) was not treated. The time of ovulation was estimated by transrectal ultrasound at 12-h intervals. Altrenogest treatment significantly reduced pregnancy Rate when start of treatment was before or at ovulation: 25% (5/20) compared to later start of treatment [85% (28/33)] and non-treated CTR1 [100% (23/23)]. Altrenogest treatment also reduced (p <0.05) number of foetuses, from 14.6 ± 2.6 in CTR1 to 12.5 ± 2.5 when ALT started 1–1.5 days from ovulation and 10.7 ± 2.9 when ALT started 0–0.5 days from ovulation. In a second experiment, sows with a weaning-to-oestrous interval (WOI) of 6, 7 or 8–14 days were given ALT [either 20 mg (ALT20; n = 49) or 10 mg (ALT10; n = 48)] at day 4 and day 6 after onset of oestrus or were not treated (CTR2; n = 49), and Farrowing Rate and litter size were evaluated. Weaning-to-oestrous interval did not affect Farrowing Rate or litter size. ALT did not affect Farrowing Rate (86% vs 90% in CTR2), but ALT20 tended to have a lower litter size compared with CTR2 (11.7 ± 4.1 vs 13.3 ± 3.1; p = 0.07) and ALT10 was intermediate (12.3 ± 2.9). In conclusion, altrenogest supplementation too soon after ovulation reduces fertilization Rate and embryo survival Rate and altrenogest supplementation at 4–6 days of pregnancy reduces litter size. As a consequence, altrenogest supplementation during early pregnancy may reduce both Farrowing Rate and litter size and cannot be applied at this stage in practice as a remedy against low litter size.

  • an increased feed intake during early pregnancy improves sow body weight recovery and increases litter size in young sows
    Journal of Animal Science, 2011
    Co-Authors: L L Hoving, N M Soede, E A M Graat, H Feitsma, C M C Van Der Peetschwering, B Kemp
    Abstract:

    This study evaluated the effect of feeding level and protein content in feed in first- and second-parity sows during the first month of gestation on sow BW recovery, Farrowing Rate, and litter size during the first month of gestation. From d 3 to d 32 after first insemination, sows were fed either 2.5 kg/d of a standard gestation diet (Control, n = 49), or 3.25 kg/d (+ 30%) of a standard gestation diet (Plus Feed, n = 47), or 2.5 kg/d of a gestation diet with 30% greater level of ileal digestible AA (Plus Protein, n = 49). Feed intake during the experimental period was 29% greater for Plus Feed sows compared with Control and Plus Protein sows (93 vs. 72 kg, P <0.05). Plus feed sows gained 10 kg more BW during the experimental period compared with Control and Plus Protein sows (24.2 ± 1.2 vs. 15.5 ± 1.2 and 16.9 ± 1.2 kg, respectively, P <0.001). Backfat gain and loin muscle depth gain were not affected by treatment (P = 0.56 and P = 0.37, respectively). Farrowing Rate was lesser, though not significantly, for Plus Feed sows compared with Control and Plus Protein sows (76.6% vs. 89.8% and 89.8%, respectively, P = 0.16). Litter size, however, was larger for the Plus Feed sows (15.2 ± 0.5 total born) compared with the Control and Plus Protein sows (13.2 ± 0.4 and 13.6 ± 0.4 total born, respectively, P = 0.006). Piglet birth weight was not different among treatments (P = 0.65). For both first- and second-parity sows, the Plus Feed treatment showed similar effects on BW gain, Farrowing Rate, and litter size. In conclusion, an increased feed intake (+ 30%) during the first month of gestation improved sow BW recovery and increased litter size but did not significantly affect Farrowing Rate in the subsequent parity. Feeding a 30% greater level of ileal digestible AA during the same period did not improve sow recovery or reproductive performance in subsequent parity

  • reproductive performance of second parity sows relations with subsequent reproduction
    Livestock Science, 2011
    Co-Authors: L L Hoving, N M Soede, E A M Graat, H Feitsma, B Kemp
    Abstract:

    Abstract The objective of this study was to determine relations between reproductive performance, i.e. being a repeat breeder and litter size, in 2nd parity and reproductive performance in later parities. In addition, relations between the 1st and 2nd parity litter size and litter size in later parities were determined. First, 184,135 records from 46,571 sows were used to analyze the effect of being a repeat breeder in 2nd parity on subsequent Farrowing Rate, litter size and parity number at culling. Second, 161,521 records of 39,654 sows were used to analyze the effect of litter size from 1st insemination in 2nd parity, being either low (≤ 10 piglets total born), medium (11–13) or high (≥ 14), on subsequent litter size, Farrowing Rate and parity number at culling, with litter size in 1st parity included in the model as well. In total 15.7% of the sows inseminated in 2nd parity were a repeat breeder in 2nd parity. Being a repeat breeder in 2nd parity did not affect litter size in subsequent parities, however it decreased Farrowing Rate in parity 3 (4.1%) and 4 (3.4%), but not in later parities (P

  • effects of altrenogest treatments before and after weaning on follicular development Farrowing Rate and litter size in sows
    Journal of Animal Science, 2011
    Co-Authors: J J J Van Leeuwen, B Kemp, M R T M Martens, J Jourquin, M A Driancourt, N M Soede
    Abstract:

    In a previous study, we showed that follicle size at weaning affects a sow’s response to a short altrenogest treatment after weaning. In this study, an attempt was made to prevent growth of follicles into larger size categories before weaning using different altrenogest treatments before weaning to improve reproductive performance after postweaning altrenogest treatments. Sows (87 primiparous and 130 multiparous) were assigned to: control (no altrenogest treatment; n = 59), RU0-20 (20 mg altrenogest, d -1 to d 6; weaning = d 0; n = 53), RU40-20 (40 mg altrenogest, d -3 to d 0 and 20 mg altrenogest d 1 to d 6; n = 53), and RU20-20 (20 mg altrenogest, d -3 to d 6; n = 52). Follicle size was assessed daily with trans-abdominal ultrasound. Follicle size on d -3 (3.6 ± 0.7 mm) and at weaning (4.0 ± 0.7 mm) was similar for all treatments. Altrenogest-treated sows had larger follicles at the start of the follicular phase than control sows (5.4 ± 0.1 and 3.8 ± 0.2 mm, LS Means, respectively; P <0.0001) and on d 4 of the follicular phase (8.0 ± 0.1 and 6.7 ± 0.2 mm, LS Means, respectively; P <0.0001). Multiparous sows had larger follicles than primiparous sows at the start of the follicular phase (5.3 ± 0.1 and 4.7 ± 0.1 mm, LS Means, respectively; P <0.01) and on d 4 of the follicular phase (8.0 ± 0.1 and 7.0 ± 0.1 mm, LS Means, respectively; P <0.0001). Farrowing Rate and litter size (born alive + dead) were not affected by treatment or parity. However, in primiparous sows, when mummies were included in litter size, altrenogest sows had larger litters than control sows (13.4 ± 0.5 and 11.9 ± 0.7 piglets, respectively; P = 0.02). In primiparous control sows, backfat depth at weaning and litter size were positively related (slope of the regression line = 0.82; P <0.05), which was not the case in primiparous altrenogest sows. In conclusion, the different altrenogest treatments before weaning did not prevent growth of follicles before weaning and similarly affected subsequent follicle development and fertility. In primiparous sows, altrenogest treatment after weaning increased the number of fetuses during pregnancy but positive effects seemed limited by uterine capacity. Altrenogest treatment after weaning improved litter size in primiparous sows with low backfat depth at weaning, which suggests a specific positive effect of a recovery period after weaning in sows with low body condition scores at weaning