Animal最新文献

{"title":"Effect of 25-hydroxycholecalciferol and high phytase doses on performance, vitamin D status, bone mineralization, and mechanistic target of rapamycin gene expression of broilers","authors":"L.S. Bassi ,&nbsp;C.C.S. Martins ,&nbsp;C.A. Lozano-Poveda ,&nbsp;I.C. Dias ,&nbsp;S.G. Oliveira ,&nbsp;A. Maiorka","doi":"10.1016/j.animal.2024.101353","DOIUrl":"10.1016/j.animal.2024.101353","url":null,"abstract":"<div><div>The use of exogenous phytase and vitamin D₃ metabolites such as 25-hydroxycholecalciferol (<strong>25-OH-D₃</strong>) for poultry is well consolidated, but the potential for additive effects when supplementing both requires further investigation. This study investigated possible interactions between supplementation of 25-OH-D₃ and high doses of phytase for broilers fed Ca− and P-deficient diets. A total of 1 200 one-d-old male broiler chicks were randomly allocated from one of four dietary treatments in a 2 × 2 factorial arrangement: 600 or 2 000 phytase units (<strong>FYT</strong>)/kg and with or without the inclusion of 25-OH-D₃ at 69 µg/kg, with 12 replicates of 25 broilers each. Two feeding phases were stablished (1-to-21 and 22-to-42 d) and all diets contained commercial levels of vitamin D₃ (100 µg/kg) with total Ca and available P respectively set to 0.6 and 0.3%. Supplementation with 25-OH-D₃ increased body weight gain (<strong>BWG</strong>) and reduced feed conversion ratio (<strong>FCR</strong>) from 1 to 21 d (<em>P</em> &lt; 0.05), as well as increased BWG from 1 to 42 d (<em>P</em> &lt; 0.05). Serum 25-OH-D₃ levels at 21 and 42 d were increased with 25-OH-D₃ (<em>P</em> &lt; 0.001). Phytase did not affect growth performance from 1 to 21 d, but a higher dose (2 000 FYT/kg) reduced feed intake and FCR from 22 to 42 d compared to 600 FYT/kg, also reducing FCR in the total period (<em>P</em> &lt; 0.05). The mRNA expression of mechanistic target of rapamycin in breast muscle assessed at 42 d was enhanced with 2 000 FYT/kg (<em>P</em> &lt; 0.001). Bone weight, bone contents of ash, Ca, and P, and bone breaking strength of tibia bone measured at 42 d were not affected by any dietary treatment. Although both additives are known to improve dietary Ca and P utilization, there were no detected additive or synergic effects. The results suggested that the inclusion of 25-OH-D₃ and phytase combined with regular vitamin D₃ levels can help minimize losses of performance and bone mineralization of broilers fed Ca- and P-deficient diets. Furthermore, vitamin D status is refined with dietary 25-OH-D₃ and potential improvements on breast meat yield can be obtained with a high phytase dose of 2 000 FYT/kg.</div></div>","PeriodicalId":50789,"journal":{"name":"Animal","volume":"19 2","pages":"Article 101353"},"PeriodicalIF":4.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142958334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Determinants of fertility in timed artificial insemination programs in beef cattle: predictive ability and risk factors from almost 2 million data points","authors":"R.E.F. Assis ,&nbsp;F. Baldi ,&nbsp;L.B. Temp ,&nbsp;R. Ungerfeld ,&nbsp;M.F. de Sá Filho","doi":"10.1016/j.animal.2024.101410","DOIUrl":"10.1016/j.animal.2024.101410","url":null,"abstract":"<div><div>Timed artificial insemination (<strong>TAI</strong>) is a technology widely used in cattle production based on controlling ovarian follicular growth. This study analyzed a large database aiming to determine the influence of several intrinsic and extrinsic female factors, as well as their interactions to determine risk factors and produce prediction ability in beef cattle. A total of 1 832 999 TAIs conducted on 2 002 farms across South American countries were considered for the analysis, including 15 main fixed effects or interactions in the statistical model, in addition to five random effects. The pregnancy/A.I. (<strong>P/AI</strong>) was affected by Order of service (1st TAI &gt; resynchronizations), body condition class (<strong>BCS</strong>) (high &gt; medium &gt; low), female genetic group [<em>Bos taurus</em> and crossbreds &gt; <em>Bos indicus</em>], breeding season (reduction of the P/AI every year), female category [Non-lactating multiparous &gt; Suckled multiparous &gt; Suckled primiparous &gt; Nulliparous heifers], period of year (July-September, October-December and January-March &gt; April-June) and climatic region as well as the interactions between Order of service and female category, BCS class and female genetic group (impact of BCS: <em>Bos taurus</em> or crossbreed animals &gt; <em>Bos indicus</em>), BCS and female category (impact of BC:S Suckling &gt; non-Suckling categories), female category and time of female availability, female category and female genetic group, female category and climatic region, and climatic region and period of the year. Farm, technician, and sire were the variables with the highest predictive ability for P/AI. At the same time, breeding season, climatic region, and time of female availability were the variables with the lowest predictive ability. In conclusion, the main female intrinsic factors that affected fertility in commercial beef cattle A.I. programs were the Order of service, BCS class, female category, and female genetic group. The female extrinsic factors that most affected P/AI were the breeding season and the climatic region. Farm, A.I. technician, sire, and the interaction between the female category and BCS class were the variables with the highest predictive abilities on pregnancy per TAI. Conjunctural factors, which are more adjustable, have a higher impact on P/AI prediction ability than structural factors. Thus, farm management and structure, A.I. technician, bull semen, and female BCS should be the main factors of attention to obtain good results in applying this biotechnology in beef cattle. Despite the influence of each factor, this study demonstrated the usefulness of analyzing big databases, allowing to determine effects that cannot be studied with experimental approaches, providing a complementary approach to decide where to focus future studies to enhance TAI pregnancy rates in beef cattle.</div></div>","PeriodicalId":50789,"journal":{"name":"Animal","volume":"19 2","pages":"Article 101410"},"PeriodicalIF":4.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143041927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Review: A systematic review of dairy cow health, welfare, and behaviour in year-round loose range housing","authors":"W.J. Harvey ,&nbsp;L. Petrokofsky ,&nbsp;M.W. Jordon ,&nbsp;G. Arnott ,&nbsp;L.W. von Walter ,&nbsp;A. Malik ,&nbsp;T. Carter ,&nbsp;L.S. Wade ,&nbsp;G. Petrokofsky","doi":"10.1016/j.animal.2024.101411","DOIUrl":"10.1016/j.animal.2024.101411","url":null,"abstract":"<div><div>This systematic review compares the health, welfare, and behaviour of dairy cows in year-round loose housing systems against those kept in other housing systems in temperate regions. Year-round loose housing systems comprised housing where dairy cows had no access to the outdoors or only had access to a yard, pen or run. The comparator housing systems also comprised housing with and without outdoor access (including grazing). To contribute to evidence-informed policy, a systematic evidence evaluation was undertaken to assess the scientific evidence base for this question, and determine whether the evidence base is robust enough to determine any association between housing systems and health, welfare and natural behaviour in dairy cows. We assessed 11 181 references and reviewed 53 articles in detail following best practice guidance for systematic review. Seven different types of housing systems were compared and a total of 120 different Health, Welfare and Behaviour (<strong>HWB</strong>) outcomes were assessed, comprising 839 measurements for HWB. Results indicate both advantages and disadvantages of year-round loose-housing systems. These differences were not just between studies; there were also differences within-studies for individual HWB indicators. There was substantial heterogeneity in methods of collecting and measuring HWB outcomes across the studies; therefore, a robust statistical test (such as meta-analysis) of correlation between potential explanatory variables and HWB outcomes was not possible for any housing comparison or any individual HWB measurement. Assessing the evidence base systematically as a whole, there is only weak evidence that year-round loose-housing is either better or worse than housing systems with grazing for the health and welfare of dairy cows. There is also only weak evidence that year-round loose-housing is either better or worse than housing systems with any outdoor access, including but not limited to grazing, for the health and welfare of dairy cows. Variation in data reporting across studies is too great to allow robust statistical analysis of the direct effects of loose-housing systems and/or grazing on the health and welfare of dairy cows. Data are also often presented in an aggregated form that limits meaningful comparisons. For future research, data collected should be made freely available in a disaggregated form to enable robust meta-analysis to be conducted. In order to change policies and practices, based on evidence, more standardised primary research studies, measuring welfare indicators, including behaviour, are necessary.</div></div>","PeriodicalId":50789,"journal":{"name":"Animal","volume":"19 2","pages":"Article 101411"},"PeriodicalIF":4.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143061044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Short communication: Genomic prediction based on unbiased estimation of the genomic relationship matrix in pigs","authors":"M.Y. Li ,&nbsp;L.Y. Shi ,&nbsp;D.E. MacHugh ,&nbsp;X.Q. Wang ,&nbsp;J.J. Tian ,&nbsp;L.G. Wang ,&nbsp;Y.J. Deng ,&nbsp;L.X. Wang ,&nbsp;F.P. Zhao","doi":"10.1016/j.animal.2024.101402","DOIUrl":"10.1016/j.animal.2024.101402","url":null,"abstract":"<div><div>The traditional genomic relationship matrix (<strong>GRM</strong>) has shown to be a biased estimation of true kinship, which can affect subsequent genetic analyses. In this study, we employed an unbiased kinship (<strong>UKin</strong>) estimation method within the genomic best linear unbiased prediction framework to evaluate its prediction performance on both a simulated dataset and a Large White pig dataset. The simulated dataset encompasses six traits, 900 quantitative trait loci, and 36 000 single nucleotide polymorphisms (<strong>SNPs</strong>). Two scenarios (small effect genes; major genes and small effect genes) and three heritabilities (0.1, 0.3 and 0.5) were considered. The Large White pig dataset includes two traits, 3 290 animals and 35 172 SNPs. The prediction performance of the Ukin method was compared with several other GRM construction methods, including VanRaden1 and 2 methods, Goudet method, and the runs of homozygosity (<strong>ROH</strong>) method. In the simulated dataset, VanRaden2 method and the UKin+VanRaden1 method achieved relatively higher prediction accuracies, averaging 0.561 and 0.558 for the six traits, respectively. Apart from the ROH method, all methods demonstrated similar levels of unbiasedness, around 1.10. In the Large White pig dataset, the accuracy of two traits hovered around 0.780, and the unbiasedness around 0.99, again with the ROH method as an exception. This study underscores the potential of the unbiased kinship estimation method in animal breeding.</div></div>","PeriodicalId":50789,"journal":{"name":"Animal","volume":"19 2","pages":"Article 101402"},"PeriodicalIF":4.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143015043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Environmental trade-offs of meeting nutritional requirements with a lower share of animal protein for adult subpopulations","authors":"J. Aubin ,&nbsp;F. Vieux ,&nbsp;S. Le Féon ,&nbsp;M. Tharrey ,&nbsp;J.L. Peyraud ,&nbsp;N. Darmon","doi":"10.1016/j.animal.2024.101182","DOIUrl":"10.1016/j.animal.2024.101182","url":null,"abstract":"<div><div>Decreasing the share of protein contributed by animal-based foods is recommended to move towards more sustainable and healthier diets. This study aimed to assess the potential environmental impacts of diets with a lower share of animal protein. The diets were modeled to include the minimum share of animal protein in total protein that met nutrient requirements and did not increase costs. The new diets also minimized the difference in the quantity of food from those of observed (<strong>OBS</strong>) diets. They were modeled for five adult subpopulations (defined by sex and age) using mathematical optimization. The model was created by combining the INCA2 database (to model OBS diets in the French population) and a database of 207 food items to adjust nutritional and price parameters. All modeled diets satisfied nutritional and cost constraints. A low-animal-protein (<strong>LAP</strong>) diet was identified for each subpopulation by progressively decreasing the share of animal protein by steps of 5% until the recommended quantity of protein and/or consumption constraints were no longer satisfied. Potential environmental impacts of the LAP diets in eight impact categories were calculated using life cycle assessment and life cycle inventories from Agribalyse® 3.0. A LAP diet for the entire population was calculated as a weighted mean of the subpopulations’ LAP diets. The share of animal protein decreased from 70% in the OBS diet to 50% in the LAP diet. Compared to the OBS diet, the LAP diet decreased five environmental impacts: climate change (greenhouse gas emissions), acidification (emissions of acidifying compounds) and land occupation (all by more than 30%), cumulative energy demand (by 23%) and marine eutrophication (by 13%). Conversely, it increased three environmental impacts: freshwater eutrophication and water use (both by ca. 40%) and biodiversity damage potential (potential loss of species associated with land use) (by 66%). These results suggest that decreasing the share of animal protein to 50% is compatible with nutritional requirements, affordability and consumption constraints, but would have mixed effects on the environment.</div></div>","PeriodicalId":50789,"journal":{"name":"Animal","volume":"19 ","pages":"Article 101182"},"PeriodicalIF":4.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141027170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Review: Will “cultured meat” transform our food system towards more sustainability?","authors":"Jean-François Hocquette ,&nbsp;Sghaier Chriki ,&nbsp;Dominique Fournier ,&nbsp;Marie-Pierre Ellies-Oury","doi":"10.1016/j.animal.2024.101145","DOIUrl":"10.1016/j.animal.2024.101145","url":null,"abstract":"<div><div>Our agri-food system today should provide enough healthy food of good quality for the growing human population. However, it should also preserve natural resources and better protect livestock. In this context, some <em>FoodTech</em> companies are developing a disruptive approach: cell culture for <em>in vitro</em> food production of “meat” but this technology is still at the research and development stage. This article will highlight its development, the technologies used and the stakeholders involved (Part 1), its potential environmental impacts (Part 2) but also regulatory, social and ethical issues (Part 3). This article aims to shed light throughout the manuscript on two major controversies related to “cultured meat”. The first controversy is related to its ethical aspects, which includes different points: its potential to reduce animal suffering and therefore to improve animal welfare, the future values of our society, and a trend towards food artificialisation. The second controversy includes environmental, health and nutritional issues, in relation to the characteristics and quality of “cultured meat” with an important question: should we call it meat? These two controversies act in interaction in association with related societal, legal and consequently political issues. Answers to the various questions depend on the different visions of the World by stakeholders, consumers and citizens. Some of them argue for a moderate or a strong reduction in livestock farming, or even the abolition of livestock farming perceived as an exploitation of farm animals. Others just want a reduction of the current much criticised intensive/industrial model. Compared with other potential sustainable solutions to be implemented such as reduction of food losses and waste, new food consumption habits with less proteins of animal sources, sustainable intensification, development of agroecological livestock production, or the development of the market for other meat substitutes (proteins from plants, mycoproteins, algae, insects, etc.), “cultured meat” has an uncertain future.</div></div>","PeriodicalId":50789,"journal":{"name":"Animal","volume":"19 ","pages":"Article 101145"},"PeriodicalIF":4.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140403935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Review: Livestock cell types with myogenic differentiation potential: Considerations for the development of cultured meat","authors":"M. Olenic ,&nbsp;C. Deelkens ,&nbsp;E. Heyman ,&nbsp;E. De Vlieghere ,&nbsp;X. Zheng ,&nbsp;J. van Hengel ,&nbsp;C. De Schauwer ,&nbsp;B. Devriendt ,&nbsp;S. De Smet ,&nbsp;L. Thorrez","doi":"10.1016/j.animal.2024.101242","DOIUrl":"10.1016/j.animal.2024.101242","url":null,"abstract":"<div><div>With the current environmental impact of large-scale animal production and societal concerns about the welfare of farm animals, researchers are questioning whether we can cultivate animal cells for the purpose of food production. This review focuses on a pivotal aspect of the cellular agriculture domain: cells. We summarised information on the various cell types from farm animals currently used for the development of cultured meat, including mesenchymal stromal cells, myoblasts, and pluripotent stem cells. The review delves into the advantages and limitations of each cell type and considers factors like the selection of the appropriate cell source, as well as cell culture conditions that influence cell performance. As current research in cultured meat seeks to create muscle fibers to mimic the texture and nutritional profile of meat, we focused on the myogenic differentiation capacity of the cells. The most commonly used cell type for this purpose are myoblasts or satellite cells, but given their limited proliferation capacity, efforts are underway to formulate myogenic differentiation protocols for mesenchymal stromal cells and pluripotent stem cells. The multipotent character of the latter cell types might enable the creation of other tissues found in meat, such as adipose and connective tissues. This review can help guiding the selection of a cell type or culture conditions in the context of cultured meat development.</div></div>","PeriodicalId":50789,"journal":{"name":"Animal","volume":"19 ","pages":"Article 101242"},"PeriodicalIF":4.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141693019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Aims and Scope","authors":"","doi":"10.1016/S1751-7311(25)00021-7","DOIUrl":"10.1016/S1751-7311(25)00021-7","url":null,"abstract":"","PeriodicalId":50789,"journal":{"name":"Animal","volume":"19 ","pages":"Article 101438"},"PeriodicalIF":4.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143172454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nose-clip use in semi-free ranging pigs reduces rooting without disrupting affiliative behaviour or causing prolonged stress","authors":"E. Collarini ,&nbsp;O. Dal Monte ,&nbsp;M. Traversa ,&nbsp;E. Mecarelli ,&nbsp;C. Medana ,&nbsp;S. Visentin ,&nbsp;G. Cordoni ,&nbsp;I. Norscia","doi":"10.1016/j.animal.2024.101404","DOIUrl":"10.1016/j.animal.2024.101404","url":null,"abstract":"<div><div>Domestic pigs (<em>Sus scrofa</em>) raised under natural conditions can show their complete behavioural repertoire. However, rooting behaviour can have a great impact on the environment. In the context of the promotion of farm animal welfare and environmental concerns, this study investigated the potential of nose-clips as a less invasive alternative to nose-rings for the management of rooting behaviour of free-ranging pigs. We collected behavioural data and salivary cortisol levels on two groups: an experimental group (n = 17) with nose-clips and a control group (n = 17) without nose-clips. After the nose-clipping, we observed a temporary increase in anxiety-related behaviour and cortisol levels during the 1st week, followed by a return to pre-application levels in the following weeks. We found a temporary decrease in affiliative interactions involving the nose during the 1st week after the application of nose-clips, whereas no differences in affiliative interactions without nose contact and aggression levels were observed. Moreover, nose-clips effectively reduced destructive excavation behaviours, without leading to a simultaneous increase in other exploratory behaviours. In conclusion, our findings show that nose-clips could be a solution that mitigates destructive rooting while preserving social interactions and animal welfare. Further research is essential to consolidate these findings and assess the long-term implications of this approach.</div></div>","PeriodicalId":50789,"journal":{"name":"Animal","volume":"19 2","pages":"Article 101404"},"PeriodicalIF":4.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143014919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Short communication: The importance of random effects in detecting purging of inbreeding depression: A model comparison in Pannon White rabbits","authors":"I. Nagy ,&nbsp;I. Curik ,&nbsp;A.T. Nguyen ,&nbsp;J. Farkas ,&nbsp;Gy. Kövér","doi":"10.1016/j.animal.2024.101412","DOIUrl":"10.1016/j.animal.2024.101412","url":null,"abstract":"<div><div>Inbreeding depression (<strong>ID</strong>) is a well-documented phenomenon associated with reduced fitness and possible extinction. However, ID can be mitigated or even eliminated through the interplay of inbreeding and selection, a process known as purging. The aim of this study was to compare the predictive power of two commonly used approaches in models with and without random dam effects to detect purging (full and reduced models). Specifically, we compared the full and reduced models based on the Kalinowski ancestral inbreeding coefficient (<strong>KAL</strong>) with the full and reduced inbreeding-purging (<strong>IP</strong>) models based on the purged inbreeding coefficient. Our analysis utilised kindling records from 1 379 Pannon rabbits born between 1992 and 1997. We modelled the effects of dam and litter inbreeding on kit survival at birth (zero/one), an important fitness trait, along with the effects of parity and the effects of kindling season. Random dam effects were only considered in the full KAL and IP models. We assessed the classification abilities (predictive power) of these models using Receiver Operating Characteristic (<strong>ROC</strong>) and Precision-Recall (<strong>PR</strong>) curves, where larger areas under the curve (<strong>AUC</strong>) indicate better classification performance. The full KAL model (AUC-ROC = 0.8156, AUC-PR = 0.9861) and the full IP model (AUC-ROC = 0.8152, AUC-PR = 0.9860), both of which include random dam effects, demonstrated high predictive power based on both methods. In contrast, the reduced KAL model (AUC-ROC = 0.5730, AUC-PR = 0.9553) and the reduced IP model (AUC-ROC = 0.5686, AUC-PR = 0.9546), which did not include random dam effects, had significantly lower AUC values. Based on our empirical results using the receiver ROC and PR curves, it could be concluded that the inclusion of random dam effects significantly increased the predictive power of the KAL and IP approaches. This finding has high importance as the inclusion of ’polygenic’ random effects is not standard - and possibly never applied - in the IP models, unlike in KAL models where their use is more common.</div></div>","PeriodicalId":50789,"journal":{"name":"Animal","volume":"19 2","pages":"Article 101412"},"PeriodicalIF":4.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143025657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}