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1.

001-es BibID:BIBFORM136696
Első szerző:Osotsi, Joab Malanda (PhD Hallgató)
Cím:Investigating attributes for selecting nurse sows in swine herds of Minnesota, USA, using Best- Worst Scaling analysis / Joab Malanda Osotsi, Renata Knop, Samira Chatila, Pedro Urriola, Peter Balogh, Gabriella Novotni-Danko
Dátum:2026
ISSN:2451-943X
Megjegyzések:Nurse sow selection is aimed at ensuring ideal sows are chosen to manage surplus piglets in hyper prolific herds. This study investigated attributes farm managers preferred when choosing nurse sows. We evaluated seven attributes: Body Condition Score (BCS), Sows' Current Litter Size (SCLS), Sows' Current Litter Health (SCLH), Sow Behaviour (SB), Sow Teat Number (STN), Lactation Stage (LS), and Parity (P). Choice decisions of 51 managers were stratified into five subgroups: gender, age, pig-farming experience, education level, and herd size managed. We used Best Worst Scaling analysis to evaluate relative importance of attributes, while Conditional Logit Model assessed their utility importance, setting P as the baseline. Results showed that SCLH was the most important while P the least important. All six attributes were significantly preferred over the baseline. Female managers showed significant preferences for all attributes than male managers. Younger managers (18-40 years old) placed significant preference on sow physical qualities compared to older managers (> 40 years old). Managers with ?10 years' experience demonstrated wider significant preference profiles than those of >10 years. Managers with college degree preferred half of the attributes while those with professional degrees (BSc/MSc) gave significant relevance to almost all attributes. Managers managing herds of up to 5,000 sows viewed all attributes significant while those in charge of extra-large herds (>5,000 sows) gave no preference to SB and LS. This research provides new empirical evidence and nuanced analysis of nurse sow selection, placing SCLH as a priority proxy for selecting a nurse sow.
Tárgyszavak:Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Large litters
Nurse sow selection
Managers preferences
Discrete Choice Experiment
Conditional Logit Model
Megjelenés:Veterinary and Animal Science. - 32 (2026), p. 1-8. -
További szerzők:Knop Renáta (1983-) (állatorvos) Chatila, Samira Urriola, Pedro Balogh Péter (1970-) (agrármérnök) Novotniné Dankó Gabriella (1967-) (agrármérnök)
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2.

001-es BibID:BIBFORM135968
035-os BibID:(Scopus)105033572158 (WoS)001722617700001
Első szerző:Osotsi, Joab Malanda (PhD Hallgató)
Cím:The effect of nurse sow parity and extended lactation length on piglet weaning outcomes and subsequent prolificacy of nurse sow / Joab Malanda Osotsi, Mequanint Gashew, Peter Balogh, Gabriella Novotni-Danko
Dátum:2026
ISSN:1594-4077
Megjegyzések:Nurse sows are used for nursing surplus piglets in hyper prolific pig herds, thereby extending their lactation. We examined weaning outcomes and effects of extended lactation length (ELL) of nurse sows on subsequent (sub) prolificacy (live-born LB, still-born SB, and mummies Ms). A total of 18,107 nurse sows were analyzed. The data encompassed nurse sows of parities (P1-P6) and three ELL categories: 0-7 d, 8-14 d, and 15-21 d. General linear mixed-effects models were applied to the data. Nurse sows weaned 12.43 piglets during the 1st wean event (W1) and 10.82 piglets during the 2nd wean event (W2). Parity effects were detected (p<0.05) in both W1 and W2 piglets but not group effects. The highest (p<0.05) number of W1 piglets was recorded for P2 sows and the lowest for P6 sows. Parities 1-4 nurse sows weaned a higher (p<0.05) number of piglets during W2 than parities 5 and 6. Subsequent LB for nurse sow parity differed significantly (p<0.05), with the highest being recorded for parities 2-5. Parities 3-6 showed a significant number of Sub SB. Subsequent Ms were higher in parities 2-6. Extending lactation length for 15-21 days resulted in higher (p<0.05) Sub LB for parity 1 nurse sows. A similar ELL (15-21 days) resulted in significant (p<0.05) Sub Ms for P3 nurse sows. No effect (p>0.05) of any ELL on Sub SB was observed. An optimal balance between piglet weaning outcomes and future reproductive performance can be achieved by selecting younger sows and carefully managing extended lactation length.
Tárgyszavak:Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
large litters
nurse-sow system
weaning performance
subsequent prolificacy
USA
Megjelenés:Italian Journal Of Animal Science. - 25 : 1 (2026), p. 429-439. -
További szerzők:Achenef, Gashew Mequanint (1990-) (animal science) Balogh Péter (1970-) (agrármérnök) Novotniné Dankó Gabriella (1967-) (agrármérnök)
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3.

001-es BibID:BIBFORM133093
Első szerző:Osotsi, Joab Malanda (PhD Hallgató)
Cím:Shunt fostering on a large-scale commercial pig farm in Hungary: Interplay between backfat thickness and piglet weaning performance / Joab Malanda Osotsi; Putri Kusuma Astuti; Yogi Sidik Prasoj; Peter Balogh; Gabriella Novotni-Danko
Dátum:2025
Megjegyzések:Shunt fostering, also known as fall-behind management, is a unique piglet management strategy in commercial pig farming. We investigated the effects of shunt fostering on sow backfat thickness and piglet weaning. Seventeen sows were prospectively used for shunt fostering. Backfat thickness was measured at farrowing, early weaning (EW), and final weaning (FW). The results showed that the mean parity of sows utilized for shunt fostering was 3.4 ? 0.7. At farrowing, EW and FW, the mean backfat was 14.52 mm ? 2.7, 11.65 mm ? 2.23, and 10.06 mm ? 2.14, respectively. Backfat thickness differed (p<0.05) from farrowing to weaning; however, there was no difference (p>0.05) in backfat changes during weaning times. Sows used in shunt fostering lost 13.7% of their backfat within that period and 33.5% during the entire lactation period. There was a difference (p < 0.05) in the number of weaned piglets during EW (13.18) and FW (12.41). Spearman's correlation established a positive but non-significant relationship between backfat thickness at farrowing and number of live born (?=0.336, p>0.05). In conclusion, shunt fostering is meant to increase piglet survival, and these findings underscore the importance of focusing on aspects of management that could improve the efficiency of shunt fostering.
Tárgyszavak:Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Large litter, fostering, batch farrowing system, backfat measurement, pigs weaned
Megjelenés:BIO Web of Conferences. - 192 (2025), p. 1-6. -
További szerzők:Astuti, Putri Kusuma (1994-) (állattenyésztési genetikus) Prasojo, Yogi Sidik Balogh Péter (1970-) (agrármérnök) Novotniné Dankó Gabriella (1967-) (agrármérnök)
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4.

001-es BibID:BIBFORM132744
Első szerző:Osotsi, Joab Malanda (PhD Hallgató)
Cím:Investigating relationship between sow body condition at farrowing with colostrum IgG, live-born piglets, and assessment of early neonatal mortality in pig production. / Joab Malanda Osotsi, Peter Balogh, Gabriella Novotni-Danko
Dátum:2025
Megjegyzések:Colostrum quality and litter performance may be affected by differences in the body condition of sows during farrowing. This study assessed the relationship between the number of live-born piglets, colostrum immunoglobulin G (IgG) concentrations, and sow body condition. Additionally, the main causes of early piglet mortality were examined during the first three days. A total of 88 sows were evaluated for body condition at farrowing using a sow caliper. Colostrum samples were collected by manual hand milking during farrowing (within the first hour without the use of oxytocin) and promptly assessed for IgG concentration using an on-farm Brix refractometer. Liveborn piglets recorded for each litter and piglet mortality recorded for each sow. Body caliper score, Brix IgG values and live-born counts were compared using one-way ANOVA. The relationships between variables were examined using Spearman's correlation. Sow body caliper score did not differ statistically for Brix IgG concentrations (p = 0.965) and live-born piglets (p = 0.21). Caliper score and Brix IgG concentration had a negative non-significant relationship (r = -0.333, p = 0.763), as did Brix IgG and live-born piglets (r = -0.048, p = 0.660). Caliper score and live-born piglets had a positive but non-significant correlation (r = 0.153, p = 0.155). Crushing was the most common cause of early neonatal piglet death (p < 0.05), followed by euthanasia and starvation during the first three days. Crushing is the leading cause of early neonatal mortality, which remains a serious problem. These findings highlight the necessity of targeted management interventions that address early postnatal care to reduce crushing and increase early piglet survival.
Tárgyszavak:Agrártudományok Állattenyésztési tudományok előadáskivonat
könyvrészlet
Body condition
colostrum
Brix assessment
piglet mortality
Megjelenés:21st International Workshop In Research In Pig Breeding. - p. 23. -
További szerzők:Balogh Péter (1970-) (agrármérnök) Novotniné Dankó Gabriella (1967-) (agrármérnök)
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5.

001-es BibID:BIBFORM129899
Első szerző:Osotsi, Joab Malanda (PhD Hallgató)
Cím:Sow Backfat Thickness Changes During Lactation, their Total born and Weaning Performance: Implications of Sow Parity Number / Joab Malanda Osotsi ; Peter Balogh ; Gabriella Novotni-Danko
Dátum:2025
Megjegyzések:This study aimed to assess the backfat thickness (BFT) of sows and its relationship with weaning performance in one sow farm in Eastern Hungary. A total of 196 sows of different parities (P) 1-7 were investigated. Variables analyzed included BFT D109 of gestation, total born (liveborn LB, stillborn SB and mummies M), BFT D28 (at weaning), and number of piglets weaned (NwP). Test for normality was performed using One-Sample Kolmogorov-Smirnov (KS) test. Data were analyzed using Kruskal-Wallis (KW) H-test to determine if there were significant differences across parities followed by Post-hoc pairwise multiple comparisons where significance was detected. Spearman's correlation was used to assess the relationship between BFT D28 and NwP. With a degree of freedom of 6, the results showed that parity significantly differed for BFT D109 (KW=24.114, p<0.001) and for NwP (KW=42.843, p<0.001). There were no parity differences in the LB, SB, M and BFT D28 (KW=8.642, p=0.195, KW=10.137, p=0.119, KW =14.465, p=0.025, and KW=15.371, p=0.018) respectively. Post-hoc pairwise comparisons revealed that P1 sows had a higher (p<0.001) BFT D109 than P3 and P4 sows. Sows lost 4.24mm of backfat thickness at weaning. The NwP did not differ by parity (p>0.001). Spearman correlation indicated a non-significant (p>0.05) relationship between NwP and BFT D28. The coefficient of determinant (R2=0.0437) indicated that 4.37% of variation in backfat loss during lactation can be attributed to number of weaned piglets. In conclusion, regular monitoring of backfat makes it possible to guide sow management. It could enhance sow health, fertility and productivity.
Tárgyszavak:Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Backfat measurement
AnyScan BF device
Hypor sow
Large-scale pig farm
Hungary
Megjelenés:International Journal of Veterinary Science. - 14 : 6 (2025), p. 1183-1189. -
További szerzők:Balogh Péter (1970-) (agrármérnök) Novotniné Dankó Gabriella (1967-) (agrármérnök)
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6.

001-es BibID:BIBFORM128891
Első szerző:Osotsi, Joab Malanda (PhD Hallgató)
Cím:Sow and piglet behaviour during lactation: A review focusing on selected behaviour manifested by foster sows and their fostered piglets / Joab Malanda Osotsi, Yogi Sidik Prasojo, Putri Kusuma Astuti, Mequanint Gashew, Peter Balogh, Jozsef Ratky, Gabriella Novotni-Danko
Dátum:2025
Megjegyzések:Foster (F) sows are used to nurse piglets from other sows. Nurse (N) sows are used to nurse other piglets after weaning their own piglets during lactation. Sows nursing non-biological piglets can reject or attack unfamiliar piglets. Similarly, N/F sows could fail to recognize the adopted piglets, which may result in delayed or denied suckling. Behaviours such as rejection, aggression, and failure to suckle pose both physical and nutritional challenges to the fostered piglets. Therefore, after collating the literature, this review was able to establish the following: nurse or foster sows showed antagonistic behaviour towards adopted piglets through aggression and discrimination. Similarly, N/F sows terminated nursing bouts more frequently than non-N/non-F sows. Most N/F piglets upon encountering N/F sows showed wandering squealing syndrome with escape attempts. Nurse/foster piglets exhibited more post-teat massage behaviour, a sign of ♭begging for more milk.' Resident piglets frequently attacked fostered piglets through fighting. Management of large litters in pig production entails the use of N/F sows, and the knowledge in this review could help in improving N/F sow production systems, especially on lactational behaviour. Explanations of possible interventions that are likely to reduce negative behaviours among foster sows and their piglets has been given.
Tárgyszavak:Agrártudományok Állattenyésztési tudományok konferenciacikk
folyóiratcikk
Nursing
behaviour
sow
piglet
Megjelenés:BIO Web of Conferences. - 167 (2025), p. 1-12. -
További szerzők:Prasojo, Yogi Sidik Astuti, Putri Kusuma (1994-) (állattenyésztési genetikus) Achenef, Gashew Mequanint (1990-) (animal science) Balogh Péter (1970-) (agrármérnök) Rátky József (1960-) (állattenyésztés) Novotniné Dankó Gabriella (1967-) (agrármérnök)
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7.

001-es BibID:BIBFORM125938
Első szerző:Osotsi, Joab Malanda (PhD Hallgató)
Cím:Sow and piglet behaviour during lactation: A review focusing on selected behaviour manifested by foster sows and their fostered piglets / Joab Malanda Osotsi ; Yogi Sidik Prasojo ; Putri Kusuma Astuti ; Mequanint Gashew ; Peter Balogh ; Jozsef Ratky ; Gabriella Novotni-Danko
Dátum:2024
Megjegyzések:5th International Conference on Smart and Innovative Agriculture (ICoSIA 2024) (23-24 October 2024 Universitas Gadjah Mada, Yogyakarta, Indonesia)
Foster (F) sows are used to nurse piglets from other sows. Nurse (N) sows are used to nurse other piglets after weaning their own piglets during lactation. Sows nursing non-biological piglets can reject or attack unfamiliar piglets. Similarly, N/F sows could fail to recognize the adopted piglets, which may result in delayed or denied suckling. Behaviours such as rejection, aggression, and failure to suckle pose both physical and nutritional challenges to the fostered piglets. Therefore, after collating the literature, this review was able to establish the following: nurse or foster sows showed antagonistic behaviour towards adopted piglets through aggression and discrimination. Similarly, N/F sows terminated nursing bouts more frequently than non-N/non-F sows. Most N/F piglets upon encountering N/F sows showed wandering squealing syndrome with escape attempts. Nurse/foster piglets exhibited more post-teat massage behaviour, a sign of ♭begging for more milk.' Resident piglets frequently attacked fostered piglets through fighting. Management of large litters in pig production entails the use of N/F sows, and the knowledge in this review could help in improving N/F sow production systems, especially on lactational behaviour. Explanations of possible interventions that are likely to reduce negative behaviours among foster sows and their piglets has been given.
Tárgyszavak:Agrártudományok Állattenyésztési tudományok nem besorolt
egyéb
suckling behaviour
teat order
sow aggression
piglet fighting
További szerzők:Prasojo, Yogi Sidik Astuti, Putri Kusuma (1994-) (állattenyésztési genetikus) Achenef, Gashew Mequanint (1990-) (animal science) Balogh Péter (1970-) (agrármérnök) Rátky József (1960-) (állattenyésztés) Novotniné Dankó Gabriella (1967-) (agrármérnök)
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8.

001-es BibID:BIBFORM125935
Első szerző:Osotsi, Joab Malanda (PhD Hallgató)
Cím:Impacts of extended lactation length of nurse sows on their risk of removal due to failure to express estrus and conception / Joab Malanda Osotsi; Peter Balogh; Gabriella Novotnine-Danko
Dátum:2024
Megjegyzések:Nurse sows in most commercial pig production systems wean their litter, and they are used to nurse an additional second litter until weaning, thereby extending their lactation period. Extended Lactation Length (ELL) of nurse sows is associated with poor reproduction thereafter. Therefore, the aim of this study was to examine the risk associated with ELL, which resulted in the removal of a nurse sow from the herd. Records of 19739 removed nurse sows through failure to express heat and did not conceive were analyzed in SPSS statistics, and Chi-square test was used to test for group differences. Three groups of ELL in days were created based on available literature recommendations. The groups comprised of 0-7d n = 3306, 8-14d n = 9293, and 15-21d n = 7140. Results showed that when parity 2 and parity 6 nurse sows were extended for 0?7 days, they faced a high risk (?2 =13.312, P = 0.021) of removal due to conception failure and failure to return to estrus, respectively. When parity 2 and parity 5 nurse sows were extended for 8?14 days, they were at high risk (?2 =59.847, P<0.001) of removal because they failed to conceive and failed to show heat, respectively. Finally, when ELL was at 15?21 days, parity 4 and parity 5 nurse sows experienced a high risk (?2 =41.751, P<0.001) of removal due to failure to express estrus, whereas at the same period of time, parity 2 and parity 3 nurse sows were at a high risk (?2 =41.751, P<0.001) of removal due to failing to conceive. Return to estrus is considered the most important indicator of the reproductive soundness of any weaned sow. Failure to return to estrus risks the herd experiencing prolonged Non Productive Days (NPDs), which are costly, and subsequently risking the sow's stayability in the herd. Producers can use this information to make adjustments to nurse sow systems.
ISBN:978-615-6457-52-3
Tárgyszavak:Agrártudományok Állattenyésztési tudományok előadáskivonat
könyvrészlet
Pig production
parity
no heat
did not conceive
culling
Megjelenés:XXVII. Tavaszi Szél Konferencia 2024 - Absztrakt kötet / szerk. Hajdú Péter. - p. 55. -
További szerzők:Balogh Péter (1970-) (agrármérnök) Novotniné Dankó Gabriella (1967-) (agrármérnök)
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9.

001-es BibID:BIBFORM125322
Első szerző:Osotsi, Joab Malanda (PhD Hallgató)
Cím:Impacts of selected parity and extended lactation length of nurse sows on their subsequent reproductive performance / Joab Malanda Osotsi, Peter Balogh, Gabriella Novotni-Danko
Dátum:2024
Megjegyzések:The aim of this study was to assess the effect of parity and extended lactation length on selected aspects of the subsequent reproductive performance of nurse sows. Data in this study was collected from 2016 to 2022 from 53 farrow-wean swine farms managed by a pig production company in the Mid-West region of the United States. The herds were selected due to utilizing nurse sow system as a method of handling large litters. A total of 105,364 nurse sows were used in this analysis. Nurse sow reproductive performance comprised the total number of piglets weaned in lactation, subsequent total piglets born TB consisting of live-born LB, still-born SB, and mummies. Extended lactation length was divided into three groups; 0-7d, 8-14d and 15-21d. Generalized linear models were applied to the data. During the same lactation period, nurse sows weaned on average 7.27% less piglets in the subsequent wean than in their first wean. P2 nurse sows weaned a significant number of piglets in their first wean event (?2 = 48.262, P < 0.001) compared to all other parities. Subsequent reproductive performance showed that live-born piglets decreased with increasing parity, whereas stillborns and mummies increased with increasing parity. Significant ?2=6867.282, P <0.001 live-born piglets were experienced among P1, 2, 3 nurse sows. Both stillborns and mummies were significant ?2=6867.282 P <0.001 among P 4, 5 and 6 nurse sows. Nurse sows that had an extended lactation length of 0-7d one week appeared to have a higher subsequent liveborn ?2=23.827, P< 0.001. Analyzing farm data helps producers gain more information on their farming systems and provide opportunities to improve nurse sow farm practices.
Tárgyszavak:Agrártudományok Állattenyésztési tudományok előadáskivonat
könyvrészlet
Nurse-sow system
large litters
extended lactation
total born piglets
Megjelenés:2024 Allen D. Leman Swine Conference- Book of abstracts. - p. 100. -
További szerzők:Balogh Péter (1970-) (agrármérnök) Novotniné Dankó Gabriella (1967-) (agrármérnök)
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10.

001-es BibID:BIBFORM125321
Első szerző:Osotsi, Joab Malanda (PhD Hallgató)
Cím:A survey description of pig production systems in smallholder farms in Kenya / Joab Malanda Osotsi, Peter Balogh, Gabriella Novotniné Danko
Dátum:2024
Megjegyzések:Kenya's pig farming sector is characterized by the existence of a limited number of large-scale producers and numerous small-scale pig farmers who sell young and adult pigs for a living. In large-scale commercial systems improved genotypes and commercial feeds are used, with appropriate animal housing and good biosecurity measures. On the other hand, reduced herd sizes coupled with relatively low nutrition levels in small-scale production systems, translate into comparatively lower productive performance. An integrated livestock system is used in small-scale pig production systems incorporating crops and other livestock species. Farmers in the small-scale systems manage their pigs with family labor, and low input investments. Small-scale farmers in Kenya raise mostly Large-White and Landrace crossbreds in semi intensive conditions. Because feeds represents 70?85% of the pigs production costs, farmers in Kenya feed their pigs with a combination of on-farm ingredients or cultures and purchased balanced commercial feeds. In addition to feed expense, a farmer's profit margin from raising pigs is influenced by the price they get paid for the animals at the market. It was intended for the survey to ascertain pig production system as well as the production constraints. The survey played a critical role in revealing information that lay the groundwork for stakeholder engagement to close the knowledge and practice gap by encouraging farmers to increase their level of husbandry practices in local pig production systems.
Tárgyszavak:Agrártudományok Állattenyésztési tudományok előadáskivonat
könyvrészlet
pig production
production systems
smallholder farms
Kenya
Megjelenés:7th Fatty pig and 12th Mediterranean pig meeting : Book of abstracts. - p. 20. -
További szerzők:Balogh Péter (1970-) (agrármérnök) Novotniné Dankó Gabriella (1967-) (agrármérnök)
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11.

001-es BibID:BIBFORM121686
Első szerző:Osotsi, Joab Malanda (PhD Hallgató)
Cím:Awareness and adoption of a nurse sow management system among small-scale pig farmers in Nakuru County, Kenya / Joab Malanda Osotsi, Mequanint Gashew, Péter Balogh, Gabriella Novotni-Dankó
Dátum:2024
ISSN:2416-1640 1587-1282
Megjegyzések:This study aimed to assess the level of awareness and adoption of nurse sow management strategies among small-scale pig farmers in Nakuru County, Kenya. The research included a survey of pig farmers who visited the Nakuru Agricultural Show in July 2023. A total of 139 farmers were interviewed within 5 days of the show. The corresponding author interviewed the respondents in a face-to-face engagement, where questions on nurse sow management were initially drafted in English and translated into Kiswahili, i.e. the second language in Kenya. The obtained results indicated that farmers came from two main regions of the county: the northern part (54.7%, 76/139) and the southern part (45.3%, 63/139). Levels of awareness and adoption were insignificant between the two groups (?2, p<0.05). A major obstacle to the adoption of this strategy was identified as feed challenge at 77.7%; (108/139) and market issue at 59.7%; (83/139). This study identified important aspects and limitations that should be considered when developing sustainable productivity development strategies for Kenyan pig farmers.To assist the sustainable growth of small-scale pig production, the authors suggest government measures that shield farmers against exploitation of feed and marketing components, as well as advocating for effective breeding to increase live born
Tárgyszavak:Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
pig production
small scale
challenges
Kenya
Megjelenés:Acta agraria Debreceniensis. - 2024 : 1 (2024), p. 113-120. -
További szerzők:Achenef, Gashew Mequanint (1990-) (animal science) Balogh Péter (1970-) (agrármérnök) Novotniné Dankó Gabriella (1967-) (agrármérnök)
Pályázati támogatás:Stipendium Hungaricum Scholarship Program
Egyéb
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12.

001-es BibID:BIBFORM121480
035-os BibID:(Scopus)85195889806 (WOS)001249452800001
Első szerző:Osotsi, Joab Malanda (PhD Hallgató)
Cím:Characterization of Removal Reasons for Nurse Sows and the associated Removal due to their Extended Lactation Length in Hyperprolific Farrow-Wean Herds / Joab Malanda Osotsi; Peter Balogh; Gabriella Novotni-Danko
Dátum:2024
ISSN:2076-2615
Megjegyzések:This study aimed to characterize and quantify reasons for removal of nurse sows and identify the removal associated with their extended lactation length (ELL). A total of 100,756 removed nurse sows within a period of 2016-2022 from sow herds in Midwest USA were analysed. Reproductive failure was the most common removal reason (?2=8748.421, P<0.001) affecting P 1, P2 and P3 nurse sows. Failure to conceive and absence of estrus were main causes of reproductive failure, (?2 32 =352.480, P<0.001) affecting P1 and P2 nurse sows and P1 and P5 nurse sows respectively. When P2 and P6 nurse sows had an ELL of 0-7d, they faced a high chance (?2 33 =13.312, P = 0.021) of removal due to conception failure and failure to return to heat, respectively. When P2 and P5 nurse sows had an ELL of 8-14d, they were highly vulnerable (?2 35 =59.847, P<0.001) to removal due to failure to conceive and showing heat respectively. Finally, when ELL was at 15-21 days, P4 and P5 nurse sows were more likely (?2 37 =41.751, P<0.001) removed due to failure to express heat, whereas at the same time, P2 and P3 nurse sows experienced same removal threat due to failing to conceive. These results could help producers managing nurse-sow systems.
Tárgyszavak:Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Pig production
nurse sow parity
reproductive failure
heat
did not conceive
Megjelenés:Animals. - 14 : 11 (2024), p. 1-10. -
További szerzők:Balogh Péter (1970-) (agrármérnök) Novotniné Dankó Gabriella (1967-) (agrármérnök)
Internet cím:Intézményi repozitóriumban (DEA) tárolt változat
Szerző által megadott URL 856 41
DOI
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