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Dr. Katarina Arvidsson Segerkvist
Department of Animal Environment and Health, Swedish University of Agricultural Sciences (SLU)

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0 Beef Cattle
0 Lamb
0 Ruminant Nutrition
0 Meat quality
0 ruminant production

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Review
Published: 25 February 2021 in Sustainability
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Beef and lamb meat production is associated with important cultural, economic and environmental impacts in most countries worldwide. However, it is also related with sustainability challenges. To enable cattle and sheep farming to develop in line with sustainability, existing knowledge need to be implemented and identified knowledge gaps filled. The purpose of this article was to systematically map the scientific literature on environmental, economic and social sustainability at farm-level beef and lamb meat production to identify knowledge gaps and to point to important future actions and areas of research. Papers published January 2000–August 2020 with a geographical origin in Europe, Northern America, and Australia-New Zealand were included. The systematic literature search resulted in a total of 1355 hits; however, after removing papers which were considered out of the scope of the study, and duplicate papers, only 22 and 11 papers related to beef and sheep farming, respectively were retained for further analysis. Of these, only 11 in total included all three sustainability dimensions. Several papers only mentioned one or two of the sustainability dimensions or put them in relation to that/those main dimension covered, thus limiting the extent to which possible synergies or tradeoffs between different sustainability aspects actually can be studied. This indicates a need for a more comprehensive approach when studying farm-level sustainability. Future research would benefit from a more holistic approach and include all dimensions of sustainability within the same study. Further, focus should also be on how to measure and assess sustainability aspects in a standardized way.

ACS Style

Katarina Arvidsson Segerkvist; Helena Hansson; Ulf Sonesson; Stefan Gunnarsson. A Systematic Mapping of Current Literature on Sustainability at Farm-Level in Beef and Lamb Meat Production. Sustainability 2021, 13, 2488 .

AMA Style

Katarina Arvidsson Segerkvist, Helena Hansson, Ulf Sonesson, Stefan Gunnarsson. A Systematic Mapping of Current Literature on Sustainability at Farm-Level in Beef and Lamb Meat Production. Sustainability. 2021; 13 (5):2488.

Chicago/Turabian Style

Katarina Arvidsson Segerkvist; Helena Hansson; Ulf Sonesson; Stefan Gunnarsson. 2021. "A Systematic Mapping of Current Literature on Sustainability at Farm-Level in Beef and Lamb Meat Production." Sustainability 13, no. 5: 2488.

Research article
Published: 02 January 2021 in Acta Agriculturae Scandinavica, Section A - Animal Science
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The aim was to evaluate the effect of two different rearing systems, indoor small pens (S) and big pens with outdoor access (B), on meat quality and fatty acid (FA) composition of two slow growing broiler hybrids (Rowan Ranger [RR] and Hubbard CYJA57 [H]). In addition, changes in the phospholipid FA composition, due to the possibility of more movement, were investigated. The results regarding meat quality were exclusively influenced by genotype, where RR chickens had higher breast weight, higher Warner-Bratzler shear force and higher pH than H chickens. Differences in lipid composition were found both due to hybrid and to the rearing system. The H birds were slightly leaner and had, therefore, higher proportions of phospholipids. Rearing in a big pen resulted in lower concentrations of 16:0 and higher concentrations of both total n-3 and n-6 fatty acids and of individual long chain polyunsaturated FA.

ACS Style

S. Sampels; J. Pickova; S. Gatchell; A. Karlsson; J. Yngvesson; K. Arvidsson Segerkvist. Effect of genetic background, pen size and outdoor access on meat quality in two slow growing broiler hybrids. Acta Agriculturae Scandinavica, Section A - Animal Science 2021, 70, 13 -22.

AMA Style

S. Sampels, J. Pickova, S. Gatchell, A. Karlsson, J. Yngvesson, K. Arvidsson Segerkvist. Effect of genetic background, pen size and outdoor access on meat quality in two slow growing broiler hybrids. Acta Agriculturae Scandinavica, Section A - Animal Science. 2021; 70 (1):13-22.

Chicago/Turabian Style

S. Sampels; J. Pickova; S. Gatchell; A. Karlsson; J. Yngvesson; K. Arvidsson Segerkvist. 2021. "Effect of genetic background, pen size and outdoor access on meat quality in two slow growing broiler hybrids." Acta Agriculturae Scandinavica, Section A - Animal Science 70, no. 1: 13-22.

Journal article
Published: 30 December 2020 in Agricultural and Food Science
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This study evaluated the effects of different lamb production systems on live weight gain (LWG), carcass quality and meat quality. Four production systems for weaned intact male lambs were examined: indoor feeding with grass silage and concentrate (group 1), grazing on cultivated pasture with (group 2) or without (group 3) concentrate, and grazing on semi-natural pasture (group 4). Live weight, carcass weight, dressing percentage, carcass conformation, fatness and pH decline were recorded at slaughter, and M. longissimus thoracis et lumborum was analysed for colour, thawing and cooking loss, pH after 24 hours and 6 days, and Warner-Bratzler shear force. LWG was strongly affected by production system, being highest for group 1 and lowest for group 4 (p

ACS Style

Elin Stenberg; Anders Karlsson; Camilla Öghren; Katarina Arvidsson Segerkvist. Carcass characteristics and meat quality attributes in lambs reared indoors, on cultivated pasture, or on semi-natural pasture. Agricultural and Food Science 2020, 29, 432–441 -432–441.

AMA Style

Elin Stenberg, Anders Karlsson, Camilla Öghren, Katarina Arvidsson Segerkvist. Carcass characteristics and meat quality attributes in lambs reared indoors, on cultivated pasture, or on semi-natural pasture. Agricultural and Food Science. 2020; 29 (5):432–441-432–441.

Chicago/Turabian Style

Elin Stenberg; Anders Karlsson; Camilla Öghren; Katarina Arvidsson Segerkvist. 2020. "Carcass characteristics and meat quality attributes in lambs reared indoors, on cultivated pasture, or on semi-natural pasture." Agricultural and Food Science 29, no. 5: 432–441-432–441.

Review
Published: 29 November 2020 in Sustainability
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The sustainability of future finfish aquaculture needs to be improved to meet global environmental challenges. Global fish aquaculture production has expanded significantly recently, due to the increased demand for fish for human consumption. Therefore, it is important to mitigate challenges to the sustainability of the sector, such as pollution and depletion of natural resources. In this study, we systematically mapped the scientific literature on farm-level sustainability in fish aquaculture. The concept of sustainability was considered holistically, covering its economic, environmental and social dimensions, each consisting of a range of different aspects that may contradict or reinforce each other. Literature published between January 2000 and August 2020 with the geographical focus on Europe, Northern America and Australia–New Zealand was included. The search resulted in a total of 287 hits, but after the exclusion of articles that did not match the scope, only 17 papers remained for the systematic mapping. Of these, five papers covered all three dimensions of sustainability. Economic sustainability was addressed in 10 papers, environmental sustainability in 13 papers and social sustainability in 12 papers. This systematic mapping provides an important foundation for discussions and prioritisations of future actions to increase knowledge on farm-level sustainability in finfish aquaculture.

ACS Style

Stefan Gunnarsson; Katarina Segerkvist; Torun Wallgren; Per Hjelmstedt; Ulf Sonesson; Helena Hansson. Systematic Mapping of Research on Farm-Level Sustainability in Finfish Aquaculture. Sustainability 2020, 12, 9985 .

AMA Style

Stefan Gunnarsson, Katarina Segerkvist, Torun Wallgren, Per Hjelmstedt, Ulf Sonesson, Helena Hansson. Systematic Mapping of Research on Farm-Level Sustainability in Finfish Aquaculture. Sustainability. 2020; 12 (23):9985.

Chicago/Turabian Style

Stefan Gunnarsson; Katarina Segerkvist; Torun Wallgren; Per Hjelmstedt; Ulf Sonesson; Helena Hansson. 2020. "Systematic Mapping of Research on Farm-Level Sustainability in Finfish Aquaculture." Sustainability 12, no. 23: 9985.

Review
Published: 08 July 2020 in Sustainability
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Dairy cows are able to convert fibrous materials, such as grass, roughage, and by-products from the food industry, into milk and meat, which justifies their role in food production. However, modern dairy farming is associated with major sustainability challenges, including greenhouse gas emissions. In order to develop sustainable future production, it is important to implement existing knowledge and fill knowledge gaps. The aim of this study was to systematically map the scientific literature on environmental, economic, and social sustainability at farm level in dairy farming. Literature published between January 2000 and March 2020 and with the geographical focus on Europe, North America, and Australia–New Zealand was included. In total, the literature search resulted in 169 hits, but after removing duplicates and papers outside the study scope only 35 papers remained. Of these, only 11 dealt with the three dimensions of sustainability, and several of these only mentioned one or two of the dimensions or set them in relation to that/those actually studied. Overall, the selected literature did not clearly explain how aspects of sustainability are interlinked, so possible negative or positive interactions between different aspects of sustainability dimensions remain unidentified.

ACS Style

Katarina Arvidsson Segerkvist; Helena Hansson; Ulf Sonesson; Stefan Gunnarsson. Research on Environmental, Economic, and Social Sustainability in Dairy Farming: A Systematic Mapping of Current Literature. Sustainability 2020, 12, 5502 .

AMA Style

Katarina Arvidsson Segerkvist, Helena Hansson, Ulf Sonesson, Stefan Gunnarsson. Research on Environmental, Economic, and Social Sustainability in Dairy Farming: A Systematic Mapping of Current Literature. Sustainability. 2020; 12 (14):5502.

Chicago/Turabian Style

Katarina Arvidsson Segerkvist; Helena Hansson; Ulf Sonesson; Stefan Gunnarsson. 2020. "Research on Environmental, Economic, and Social Sustainability in Dairy Farming: A Systematic Mapping of Current Literature." Sustainability 12, no. 14: 5502.

Short communication
Published: 30 June 2020 in Livestock Science
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This project aimed to evaluate a novel method for monitoring the health of grazing cattle. The method studied in this paper is based on an unmanned, automatic precision weighing system that can be used on pasture, and which will alarm farmers when animals show abnormal weight gain curves. The project focused primarily on the detection of pasture-borne nematode parasite infections, which clearly reduce the weight gain of calves, but the method could be further developed to include other diseases that impair animal performance. The early detection of nematode infections would both improve animal welfare and minimize the use of anthelmintics. This study included a total of 63 first season grazing steers born from dairy cows that were allocated to one of two permanent semi-natural pasture enclosures for 20 weeks. Both enclosures had two identical scales except that one scale was powered with line current and one scale was equipped with solar panels. The automatic weighing stations were situated in close proximity to a source of water, salt and minerals so that animals would voluntarily pass through them on a regular basis. LiveStock Planner® software was used to identify usable data. The number of usable recordings per animal throughout the grazing season varied from 547 to 2677 among the four weighing stations, with an average of five usable recordings per animal obtained each week. The herds were guided to the weighing area on a daily basis during the first eight weeks of the grazing period to ensure that the steers received enough water. After this period, manual observations were used to verify that all animals entered the watering area without problems. The findings showed that the weighing technique worked well; hence, the developed method demonstrates great potential as an automatic supervision tool for grazing cattle. However, even though the summer of 2016 was quite dry, there was still water available in ditches and puddles. Accordingly, water alone was not a strong enough motivation to get cattle to pass through the weighing station into the watering area. Hence, in grazing areas with natural water sources, a reward more attractive than the water, salt and minerals used in this study is needed to ensure frequent voluntary passage of cattle through the scales.

ACS Style

Katarina Arvidsson Segerkvist; Johan Höglund; Henrik Österlund; Christer Wik; Niclas Högberg; Anna Hessle. Automatic weighing as an animal health monitoring tool on pasture. Livestock Science 2020, 240, 104157 .

AMA Style

Katarina Arvidsson Segerkvist, Johan Höglund, Henrik Österlund, Christer Wik, Niclas Högberg, Anna Hessle. Automatic weighing as an animal health monitoring tool on pasture. Livestock Science. 2020; 240 ():104157.

Chicago/Turabian Style

Katarina Arvidsson Segerkvist; Johan Höglund; Henrik Österlund; Christer Wik; Niclas Högberg; Anna Hessle. 2020. "Automatic weighing as an animal health monitoring tool on pasture." Livestock Science 240, no. : 104157.

Review
Published: 26 May 2020 in Sustainability
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We systematically mapped the scientific literature on the sustainability of pig production at farm-level. Sustainability was considered holistically, covering its economic, environmental, and social dimensions, each consisting of a broad range of different aspects that may contradict or reinforce each other. Literature published between January 2000 and March 2020 with a geographical focus on Europe, North America, Australia, and New Zealand was included. A standard template with predefined keywords was used to summarise aspects of each sustainability dimension covered in identified papers. We found that papers analysing environmental sustainability were more frequent than papers analysing economic or social sustainability. However, there are many different aspects within each dimension of sustainability, hampering comparisons between studies. In addition, each dimension of sustainability has many sides, making it difficult to compare different studies, and different dimensions and aspects may have complex interrelations. Our systematic literature review revealed that these interrelations are not well understood and that possible trade-offs or synergies between different aspects of sustainability dimensions remain unidentified. This systematic mapping of the current literature on farm-level sustainability in pig production can support a more informed discussion on knowledge gaps and help prioritise future research at farm-level to enhance sustainability in pig production.

ACS Style

Stefan Gunnarsson; Katarina Arvidsson Segerkvist; Torun Wallgren; Helena Hansson; Ulf Sonesson. A Systematic Mapping of Research on Sustainability Dimensions at Farm-level in Pig Production. Sustainability 2020, 12, 4352 .

AMA Style

Stefan Gunnarsson, Katarina Arvidsson Segerkvist, Torun Wallgren, Helena Hansson, Ulf Sonesson. A Systematic Mapping of Research on Sustainability Dimensions at Farm-level in Pig Production. Sustainability. 2020; 12 (11):4352.

Chicago/Turabian Style

Stefan Gunnarsson; Katarina Arvidsson Segerkvist; Torun Wallgren; Helena Hansson; Ulf Sonesson. 2020. "A Systematic Mapping of Research on Sustainability Dimensions at Farm-level in Pig Production." Sustainability 12, no. 11: 4352.

Review
Published: 10 April 2020 in Sustainability
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The sustainability of future poultry production needs to be improved in order to meet global challenges. The global chicken population has expanded significantly in recent decades, due to increased human demand for eggs and chicken meat. Therefore, it is critically important to mitigate challenges to the sustainability of modern poultry production, such as pollution, the depletion of finite natural resources and animal welfare issues. This study systematically mapped the scientific literature on farm-level sustainability in egg and chicken meat production. The concept of sustainability was considered holistically, covering its economic, environmental and social dimensions, each consisting of a broad range of different aspects that may contradict or reinforce each other. The literature published between January 2000 and March 2020 with a geographical focus on Europe, North America and Australia–New Zealand, were included. The literature search resulted in a total of 428 hits, but after the exclusion of articles that did not match the scope of the study, only 26 papers remained for the systematic mapping. Of these, only three papers covered all three dimensions of sustainability. Aspects of economic sustainability were addressed in 10 papers, aspects of environmental sustainability in 18 papers, and aspects of social sustainability in 23 papers. The findings in this study are an important foundation for the discussion and prioritisation of future actions to increase knowledge of farm-level sustainability in egg and chicken meat production.

ACS Style

Stefan Gunnarsson; Katarina Arvidsson Segerkvist; Lina Göransson; Helena Hansson; Ulf Sonesson. Systematic Mapping of Research on Farm-Level Sustainability in Egg and Chicken Meat Production. Sustainability 2020, 12, 3033 .

AMA Style

Stefan Gunnarsson, Katarina Arvidsson Segerkvist, Lina Göransson, Helena Hansson, Ulf Sonesson. Systematic Mapping of Research on Farm-Level Sustainability in Egg and Chicken Meat Production. Sustainability. 2020; 12 (7):3033.

Chicago/Turabian Style

Stefan Gunnarsson; Katarina Arvidsson Segerkvist; Lina Göransson; Helena Hansson; Ulf Sonesson. 2020. "Systematic Mapping of Research on Farm-Level Sustainability in Egg and Chicken Meat Production." Sustainability 12, no. 7: 3033.

Journal article
Published: 16 March 2020 in Preventive Veterinary Medicine
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By avoiding animal transportation, mobile slaughter may have the potential to reduce animal stress. In a cross-sectional study with elements of cohort design, we investigated relationships between animal handling and stress-related animal behaviours in connection with slaughter at two Swedish slaughter plants: a newly started small-scale on-farm mobile abattoir and a relatively large-scale stationary slaughterhouse. To the stationary plant, the animals were transported on average 99 km from farms, and one third of these animals spent one night in lairage before slaughter. Data were collected during processing of 298 animals at both plants during one year. Stockperson actions and animal behaviours were observed in the driveways (2.4-7.3 m long) to the stun box. Data on season, hour of day, air temperature, animal breed, animal category, animal age, carcass weight and stockperson category (plant or farm) were also collected. We used Spearman rank correlation, principal-component analysis and confirmatory factor analysis to develop a final generalised structural equation model, which contained six variables that represented observed animal backing; turning; slipping; eliminating; vocalising; and violent behaviour, regressed on a latent variable representing animal stress level. Stress level and animal behaviours were also regressed on five variables representing observed stockperson actions (touching, patting or hitting with hand; touching, patting or hitting with a tool; pushing; tail-twisting; and prodding with an electric goad) and on background variables including plant identity. The animal behaviours were modelled as counts per driveway length, clustered on farm identity. Marginal effects of stockperson actions and predictive margins of plants were calculated. The animals displayed backing and violent behaviour (kicking, goring or violent fighting) at significantly lower frequencies at the mobile plant than at the stationary one. In general, stockperson actions were significantly positively associated with animal behaviours, i.e. increased actions were associated with more frequent behaviours. Stockperson moving with tool, pushing and using electric goad were indirectly significantly associated with all animal behaviours via animal stress level. This study shows the importance of adequate cattle handling to limit pre-slaughter stress.

ACS Style

Jan Hultgren; Katarina Arvidsson Segerkvist; Charlotte Berg; Anders H. Karlsson; Bo Algers. Animal handling and stress-related behaviour at mobile slaughter of cattle. Preventive Veterinary Medicine 2020, 177, 104959 .

AMA Style

Jan Hultgren, Katarina Arvidsson Segerkvist, Charlotte Berg, Anders H. Karlsson, Bo Algers. Animal handling and stress-related behaviour at mobile slaughter of cattle. Preventive Veterinary Medicine. 2020; 177 ():104959.

Chicago/Turabian Style

Jan Hultgren; Katarina Arvidsson Segerkvist; Charlotte Berg; Anders H. Karlsson; Bo Algers. 2020. "Animal handling and stress-related behaviour at mobile slaughter of cattle." Preventive Veterinary Medicine 177, no. : 104959.

Journal article
Published: 02 December 2019 in Animals
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This study compared animal performance and carcass characteristics in steers born to a dairy breed dam and a dairy or beef breed sire allocated to one out of two production systems, both including grazing semi-natural pastures during summer. Spring-born groups comprising 16 purebred dairy (D) steers and 16 dairy × Charolais crossbreeds (C) were allocated to moderately high indoor feed intensity with slaughter at 21 months of age (H), while two corresponding autumn-born groups of 16 D and 16 C animals were allocated to low indoor feed intensity with slaughter at 28 months of age (L). The animals were mainly fed grass-clover silage while housed. The H steers grazed semi-natural pastures for one summer, whereas the L steers grazed semi-natural pastures for two summers. From weaning to slaughter, liveweight gain was 0.94 and 0.77 kg day−1 for H and L steers, respectively (p < 0.0001), with no breed effect on weight gain. However, C carcasses had a higher weight, conformation score, and proportion of high-valued retail cuts than D carcasses (p ≤ 0.004). Moreover, conformation differed more between LC and LD than between HC and HD. From this study on forage and pasture-based beef production, we concluded that breed had no effect on the performance of living animals, but that dairy × beef crossbred steers produced heavier and higher-quality carcasses than pure-bred dairy steers.

ACS Style

Anna Hessle; Margrethe Therkildsen; Katarina Arvidsson-Segerkvist. Beef Production Systems with Steers of Dairy and Dairy × Beef Breeds Based on Forage and Semi-Natural Pastures. Animals 2019, 9, 1064 .

AMA Style

Anna Hessle, Margrethe Therkildsen, Katarina Arvidsson-Segerkvist. Beef Production Systems with Steers of Dairy and Dairy × Beef Breeds Based on Forage and Semi-Natural Pastures. Animals. 2019; 9 (12):1064.

Chicago/Turabian Style

Anna Hessle; Margrethe Therkildsen; Katarina Arvidsson-Segerkvist. 2019. "Beef Production Systems with Steers of Dairy and Dairy × Beef Breeds Based on Forage and Semi-Natural Pastures." Animals 9, no. 12: 1064.

Conference paper
Published: 10 September 2019 in Sustainable governance and management of food systems
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ACS Style

H. Hansson; K. Arvidsson Segerkvist; U. Sonesson; S. Gunnarsson. 5. Sustainability in animal food production – a systematic literature map to identify knowledge gaps. Sustainable governance and management of food systems 2019, 1 .

AMA Style

H. Hansson, K. Arvidsson Segerkvist, U. Sonesson, S. Gunnarsson. 5. Sustainability in animal food production – a systematic literature map to identify knowledge gaps. Sustainable governance and management of food systems. 2019; ():1.

Chicago/Turabian Style

H. Hansson; K. Arvidsson Segerkvist; U. Sonesson; S. Gunnarsson. 2019. "5. Sustainability in animal food production – a systematic literature map to identify knowledge gaps." Sustainable governance and management of food systems , no. : 1.

Journal article
Published: 08 May 2019 in Veterinary Parasitology
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We investigated the effects of gastrointestinal nematode (GIN) challenge on activity patterns in first season grazing (FSG) steers exposed to two different levels of Ostertagia ostertagi and Cooperia oncophora. At turn-out, experimental animals were allocated to one of two treatment groups grazing in different enclosures each with 32 animals. The first group (High) received 5000 third stage (L3) O. ostertagi (50%) and C. onchophora (50%) larvae; whereas the second group (Low) were dewormed monthly with 0.5 mg ivermectin (Noromectin®, Pour-on) per kg bodyweight. Activity patterns were monitored by fitting some animals in each group (High, n = 10; Low, n = 8) with leg mounted sensors (IceTag® 3D-accelerometers) during three two-week periods. In animals fitted with sensors body weight gain (BWG) was recorded every fortnight, whereas faecal and blood samples were collected every four weeks for nematode faecal egg count (FEC) and serum pepsinogen concentrations (SPC). Differences between the periods in daily (P = 0.046) and diurnal (P = 0.0502) activities were recorded between groups during the course of the study. A significant (P = 0.038) increase in the number of lying bouts was recorded in group High during the second period (days 74–86), which was correlated (r = 0.55, P = 0.018) to an increase in SPC ≈ 85 days after turn-out. BWG was reduced (P = 0.037) in group High compared to group Low, deviating from day 45. Strongyle nematode eggs were observed in both groups 29 days after turn-out, however the mean EPG remained low in group Low throughout the experiment. An increase in SPC was observed (P < 0.0038) in group High with levels peaking on day 58. In conclusion, our data supports that changes in activity patterns monitored with sensors could contribute to the identification of animals challenged with GIN, but also improve our understanding in the potential welfare impairments caused by such infections.

ACS Style

Niclas Högberg; Lena Lidfors; Anna Hessle; Katarina Arvidsson Segerkvist; Anders Herlin; Johan Höglund. Effects of nematode parasitism on activity patterns in first-season grazing cattle. Veterinary Parasitology 2019, 276, 100011 .

AMA Style

Niclas Högberg, Lena Lidfors, Anna Hessle, Katarina Arvidsson Segerkvist, Anders Herlin, Johan Höglund. Effects of nematode parasitism on activity patterns in first-season grazing cattle. Veterinary Parasitology. 2019; 276 ():100011.

Chicago/Turabian Style

Niclas Högberg; Lena Lidfors; Anna Hessle; Katarina Arvidsson Segerkvist; Anders Herlin; Johan Höglund. 2019. "Effects of nematode parasitism on activity patterns in first-season grazing cattle." Veterinary Parasitology 276, no. : 100011.

Journal article
Published: 01 January 2018 in Veterinary Parasitology
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Body weight gain (BWG) and gastrointestinal nematode challenge (GIN) were investigated in two genetically diverse groups of cattle. Thirty-two dairy calves (D=Swedish Red/Holstein) and 31 dairy×beef crosses (C=Swedish Red/Holstein×Charolais) pairwise matched by dam breed and birth dates, were monitored for ≈20 weeks on a pasture grazed by cattle in the previous year. At turn-out, animals (between 6 and 12 months age) from each genotype were either infected with 5000 third stage (L3) Ostertagia ostertagi (50%) and Cooperia oncophora (50%) larvae (H, high-exposure); or treated monthly with 0.5mg ivermectin (Noromectin®, Pour-on) per kg bodyweight to remove worms ingested (L, low-exposure). Animals were weighed every fortnight and individual BWG was calculated. Faecal and blood samples were collected every four weeks throughout the experiment for nematode faecal egg counts (FEC) and larvae cultures and serum pepsinogen concentrations (SPC), respectively. Nematode eggs were observed 29 days post turn-out in both H groups. FEC peaked to around 200 eggs per gram (epg) on days 58 and 85 respectively in both H groups. FEC were also observed in the L groups at the same time, but mean epg remained very low (3.5 IU tyrosine whereas only six DH animals reached similar pepsinogen levels. The level of infection (H and L) significantly affected BWG in both genotypes. Even though there was no statistically significant genotype (C or D)×treatment (H or L) interaction, there was a larger difference in body weight of H and L in C (37kg) compared to D (17kg) genotypes at the end of the experiment. Our data collectively support the view crossbred (C) animals experience the impact of gastrointestinal parasitism more severely compared to pure dairy (D) first season grazers. The mechanisms that underpin this remains speculative.

ACS Style

Johan Höglund; Anna Hessle; Konstantinos Zaralis; Katarina Arvidsson Segerkvist; Spiridoula Athanasiadou. Weight gain and resistance to gastrointestinal nematode infections in two genetically diverse groups of cattle. Veterinary Parasitology 2018, 249, 88 -91.

AMA Style

Johan Höglund, Anna Hessle, Konstantinos Zaralis, Katarina Arvidsson Segerkvist, Spiridoula Athanasiadou. Weight gain and resistance to gastrointestinal nematode infections in two genetically diverse groups of cattle. Veterinary Parasitology. 2018; 249 ():88-91.

Chicago/Turabian Style

Johan Höglund; Anna Hessle; Konstantinos Zaralis; Katarina Arvidsson Segerkvist; Spiridoula Athanasiadou. 2018. "Weight gain and resistance to gastrointestinal nematode infections in two genetically diverse groups of cattle." Veterinary Parasitology 249, no. : 88-91.