Sheep Pastures Research Articles

Analysis of urine pH and specific gravity in pasture sheep

AbstractUrine pH and specific gravity represent the routine objectively verifiable parameters in urinalysis. Urinalysis is presently an underutilised analytical tool in ovine medicine but holds the same potential for predictive, diagnostic and prognostic use in sheep as it does in human and small animal medicine. Urine pH and specific gravity were measured as a health screening tool to ascertain normal physiological ranges in sheep on free-range summer pastures with free access to drinking water. Both sexes, different ages and various breeds including Dorper, Karakul, Damara and cross-breeds were recruited into the study to investigate possible sources of variation. Experimental animals were selected through stratified random sampling using farm records from a population of 69 rams, 135 ewes and 115 lambs. Samples of urine were collected from 60 rams, 60 ewes and 60 lambs by free catch following induction of micturition by transient apnoea. Urine pH was measured by a pH metre whilst urine specific gravity was evaluated with an optical refractometer. The urine pH ranged from 6.81 to 9.08, with a mean of 8.52 ± 0.02 (se). Only one animal had a urine pH value below the existing reference level (7.4–8.5). Concurrent abnormalities of the urine in dipstick analysis included proteinuria and glucosuria. Urine specific gravity varied from 1.003 to 1.050 with a mean of 1.021 ± 0.001 (se). Four sheep, all of them lambs, had urine-specific gravity values above the existing reference level (1.015 to 1.045). The high urine specific gravity was associated with diverse pathological findings including proteinuria, pyuria and glucosuria as well as the presence of urine sediment. Urine pH was influenced by gender and breed and specific gravity by age. The results affirmed that sheep naturally produce alkaline urine and aciduria points to an underlying pathological problem. An association between high urine specific gravity and systemic/urinary system disorders was evident in lambs. Isosthenuria and hyposthenuria were frequently encountered in healthy adult sheep and were considered indices of positive water balance rather than renal dysfunction. Collated data confirmed existing reference levels but revised the upper limit of normal urine pH to 9 instead of 8.5, and the lower limit of normal urine specific gravity to 1.003 instead of 1.015.

Chronology of colonization of the nematophagous fungus Duddingtonia flagrans in sheep pastures

Chronology of colonization of the nematophagous fungus Duddingtonia flagrans in sheep pastures

A juhlegeltetési módok hatása a gyepen felvételezhető endoparazita populációra

Sampling for the occurrence of internal parasites of sheep was carried out in three extensively cultivated Achilleo - Festucetum pseudovinae grass communities with different grazing systems but with the same site conditions, in 2022 - 2023, at the MATE Research Institute in Karcag, Hungary. The sheep grazing regimes studied were: pastoral grazing, rotational grazing, and permanent, delta - forest grazing used on all grazing days. Microscopic analysis of the genomes and numbers of potentially infective oviposition and L3 larval stage endoparasites in sheep pastures was carried out on samples of faecal matter from grazed pastures and grass samples prepared using a 'larval feeder'. Our research objective was to clarify the effect of different sheep grazing practices on parasite infestation in a semi - natural grassland community with a solonyec soil composition.

Soil Phosphorus Partition and Transformations Under Diverse Land Uses

ABSTRACT This study investigates soil phosphorus (P) partitioning and transformations through chemical fractionation and modeling across various land uses to elucidate their impact on P dynamics and the potential for eutrophication. Geo-referenced soils (0–30 cm at various depth intervals) were collected from diverse land uses, including corn, soybean, wheat stubble, modified relay intercropping, corn-soybean with rye under conventional tillage and no-till systems, and sheep pastures, alongside an adjacent forest (control). Processed soils were sequentially extracted to quantify soluble reactive (SRP), exchangeable (EP), Ca and Mg bound (CaMgP), Fe and Al bound (FeAlP), particulate organic (POP), residual (RP), and total P pools. Results showed significant effects of land use and soil depth on extracted P pools. Notably, corn-soybean with rye exhibited a higher SRP accumulation (2.8 mg/kg) compared to the forest. The labile (SRP + EP), moderately labile (FeAlP + CaMgP + POP), and non-labile P (RP) pools accounted for 1 to 2, 23 to 29, and 65 to 76% of total P, respectively. The structural equation model elucidated soil P transformation, indicating the contribution of labile, moderately labile, and non-labile P pools to SRP accumulation in various land uses. Our findings underscore the critical link between land use, soil P dynamics, and eutrophication risk, offering valuable insights for developing agricultural management practices aimed at mitigating edge-of-field P loss and protecting water quality against eutrophication.

POMPEY'S APULIAN ESTATES

Pompey owned numerous properties in Italy, but except for a few residential villas little is known of their location or economic function. However, two amphora stamps have been attributed to him, which show that he was involved in the manufacture of amphorae, and probably in the production of the wine. Four tile stamps, found in the vicinity of Gravina in Puglia and at a villa at San Gilio in the upper Bradano valley, can also be attributed to Pompey for reasons discussed in detail in this paper. Since they were found in locations close to a drove road, it is inferred that Pompey had invested in properties which could be used as pasture for transhumant sheep. The circumstances in which he acquired the estate near Gravina are discussed, and it is suggested that it fell within the territory of Silvium and is likely to have been acquired by him after the War of Spartacus in which the settlement was destroyed. It is also suggested that the estate was bought by Octavian in the sale of Pompey's properties, which was still ongoing in 44 BC.

Az évjárat hatásának pontosítása feltétlen juhlegelők koratavaszi növényállomány fejlettségére

The feasibility of first grazing of extensive sheep pastures was investigated by monitoring the height of grassland in the spring of 2022 and 2023 at the Karcag Research Institute, focusing on the effect of vintage in this manuscript. For 6 grassland plots with different parameters, potentially suitable for early spring sheep grazing, in a meadow on solonyec soil with no level of inputs due to environmental subsidies, we refined soil temperature, soil moisture and height of grassland vegetation at the same time of year. For both years, it was concluded that it is justified to start grazing sheep on the fallow grassland and the pasture forest.

Tracking free-ranging sheep to evaluate interrelations between selective grazing, movement patterns and the botanical composition of alpine summer pastures in northern Italy

Extensive sheep pasturing in alpine regions has a long tradition and fulfils numerous sociological, economic and ecological functions. The effects of sheep grazing on the floristic composition and vice versa depend on various factors. Knowledge of potential interrelations is crucial to developing adequate management systems to maintain pasture productivity and its unique biodiversity. The aim of the present study was to discuss the potential interrelations between movement and selective grazing behaviour of free-ranging unherded sheep and the botanical composition of high-altitude mountain pastures in northern Italy. General movement patterns were determined by using GPS tracking. The floristic composition of areas roamed by the sheep was analysed by collecting physical data during the summer of 2022. The energy content of ingested herbage biomass was determined based on faecal samples. Ranging between 2296 and 3015 m above sea level (a.s.l.), the average altitude used by the sheep was 2654 m a.s.l. Correlation analyses showed that the sheep used significantly higher altitudes with increasing temperature and sunshine duration and with decreasing air humidity and rainfall. A clear selective grazing behaviour was revealed, namely a preference for species with better nutritional attributes. Poa alpina was the most preferred species, while areas dominated by Nardus stricta were avoided. Furthermore, the sheep showed an uphill migration over the season, possibly caused by the delayed start of grassland growth at higher altitudes. Analyses of faecal samples revealed sufficient energy contents, presumably as a result of the targeted selection of nutritious plant species. Future studies should evaluate the feeding value of herbage on offer in order to validate the current results. The study highlights the opportunity of animal tracking in remote areas and provides indications for selective grazing of sheep under conditions of free choice.

Montane Ecoclines in Ancient Central Asia: A Preliminary Study of Agropastoral Economies in Juuku, Kyrgyzstan

In this paper, we use preliminary archaeological data spanning the Iron Age through Medieval periods (ca. 800 BCE to 1200 CE) in the Juuku Valley on the south side of Lake Issyk-Kul to model land use across vertical mountain zones. We have (1) established a radiometric chronology; (2) conducted test excavations of an Iron Age settlement at 2100 m asl and a Turkic period burial at 1934 m asl; (3) undertaken preliminary archaeobotanical research; and (4) performed pedestrian surveys. Seed remains of wheat (Triticum aestivum), barley (Hordeum vulgare), broomcorn millet (Panicum milaceum) and foxtail millet (Setaria italica), and legumes were recovered in very small quantities from both sites. We compare these preliminary archaeobotanical results with previously published data from the Talgar Iron Age settlements on the north side of the Tian Shan Mountain range in Kazakhstan. A small assemblage of faunal remains found at the Turkic period kurgan and from a profile at the upland Iron Age settlement demonstrates the practice of herding sheep/goats, cattle, and horses in the Juuku Valley. The goal of this study was to test the hypothesis that pastoral transhumance and agropastoralism were interchangeable economic strategies used by peoples in the Iron Age through Medieval periods in mountain-river valleys between 600 m to 2100 m asl. These economic strategies combined the pasturing of sheep, goats, cattle, and horses with the cultivation of cereals were adapted to different vegetational zones along a vertical gradient. This paper is based on preliminary research of upland sites of the Juuku Valley in Kyrgyzstan, and initiates a long-term research study of four millennia of settlements that ranged from pastoral transhumance and combined mountain agriculture using survey data and test excavations.

Selected Biotopes of Juniperus communis L. in Slovakia and Their Chemotype Determination

The objective of this work was to map population of common juniper (Juniperus communis L.) in the territory of Slovak Republic. Common juniper is not protected by Slovakian law or the authorities; therefore, there is no law to preserve these plant populations. Biotopes of common juniper consist of light- to heavy-density trees and shrubs. The expansion of its habitat is also connected to human involvement. The loss of juniper naturally in observed plants is caused by a change in land use, loss of feeding pastures for cattle and sheep, and eutrophication of the environment. The current study was focused on monitoring the population of this plant species in the years of 2018–2020, the isolation of essential oils, and the identification of qualitative and quantitative characteristics. It was confirmed that juniper berries usually contain from 0.5 ± 0.05 to 1.8 ± 0.06%, usually 1.2 ± 0.16%, volatile oil depending on geography, altitude, ripeness, and other factors. Volatile oil is made up mostly of monoterpenes, mainly α-pinene (from 37.60 ± 2.23 to 61.00 ± 0.60%), β-myrcene (from 8.03 ± 2.02 to 10.56 ± 0.05%), and sabinene (from 3.50 ± 0.30 to 22.0 ± 0.96%). The dendrogram was constructed after a hierarchical cluster analysis based on the essential oil substances, which showed four different confirmed chemotypes. The essential oil is widely used in medicines, perfumes, insect repellents, insecticides, shoe polish, and in microscopy as a clearing agent of an immersion oil. The quality and chemotypes of juniper berries are very important for the Slovak national beverage “Borovicka” and the distillery industry on a whole in this country.

Selective grazing behavior of Coopworth sheep in New Zealand

This study focused on confirming the grazing selectivity of sheep, more and less selective, in pasture in New Zealand, under two different phenological stages of forage. Two experiments were conducted: 1) Comparison of selective and non-selective sheep in pasture irrigated with perennial ryegrass and white clover. 2) A comparison was performed with selective and non-selective sheep in pasture with a high rate of senescence composed of perennial ryegrass, barley and barnyard grass. The botanical composition of the forage was studied using the point analysis method. The forage canopy height and forage mass were measured using a disk meter. There was no significant difference between treatments in the variables analyzed. In the first experiment there was a lower clover ratio and increased litter ratio for the botanical composition and point analysis. With regards to height, there was a decrease in grazed clover pasture and grazed ryegrass pasture, as well as the forage mass. In the second experiment the grass ratio, clover height and forage mass decreased and the proportion of litter and grazed grass increased. Despite the differences in the botanical and morphological aspects of the pasture, the selective and non-selective sheep showed similar grazing behavior.

O-095 Tick-borne pathogens on sheep pasture in Norway

O-095 Tick-borne pathogens on sheep pasture in Norway

Resource partitioning between Caucasian chamois and domestic sheep in mountain pastures of the eastern Caucasus, Dagestan, Russia

Feeding and spatial distribution of Caucasian chamois and domestic sheep were studied in the eastern Caucasus. Trophic analysis showed that the chamois diet consisted of 12 herbaceous species and 21 for sheep. Chamois selected forbs and fabaceous species, whereas sheep foraged less selectively. The trophic niche breadth (averaged) of sheep was significantly greater (9.75) than that of chamois (4.33). Trophic niche overlap reached 86% in spring and 56.6% in autumn, and the summer spatial niche breadth of chamois was lower (0.83) than that of sheep (1.46). The spatial niche overlapping of both species was low (17%). Five environmental parameters made the highest contributions to interspecific differences. Chamois habitats in spring were characterised by a lower total phytomass level and higher-calorie herbaceous group biomass (forbs, fabaceous) than in sheep-grazing areas, whereas in autumn, the high-calorie herbaceous-group biomass was higher in chamois habitats than in sheep pastures. We deduce that the chamois spatial pattern is a potential response to sheep presence; chamois moves to difficult-to-reach habitats. Therefore, ecological segregation could be potentially expected due to divergence along the spatial axis of the ecological niche.

Bioeconomic evaluation of pasture sheep finishing using castor bean cake

Resumo Objetivou-se avaliar a economicidade de sistemas de terminação de ovinos em pastagem irrigada de capim-tamani sob lotação contínua, utilizando torta de mamona. Foram simulados quatro sistemas de produção: ovinos suplementados com farelo de soja e o pasto adubado com ureia (FSUR), ovinos suplementados com torta de mamona destoxificada e o pasto adubado com ureia (TMdUR), ovinos suplementados com farelo de soja e o pasto adubado com torta de mamona in natura (FSTM) e ovinos suplementados com torta de mamona destoxificada e o pasto adubado com torta de mamona in natura (TMdTM). Foi considerada a unidade mínima de 3 hectares e determinado um peso médio ao abate de 28 kg de peso corporal. Estabeleceu-se um preço de venda mínimo, no qual o sistema de criação menos lucrativo se tornasse rentável de 2,38 e 4,45 dólares por quilograma de peso corporal e por equivalente de peso da carcaça, dotando uma taxa mínima de atratividade de 3,5% ao ano, com base na taxa Selic. Os custos com adubação orgânica, em média, são 46,01% superiores aos sistemas que utilizam adubação química. A venda de animais vivos não é atrativa em nenhum dos sistemas avaliados, sendo o contrário observado para a comercialização de carcaças e dos não componentes da carcaça de ovinos. O sistema de produção FSUR se mostrou mais lucrativo, com ganho de US$ 0.53 centavos por kg de carcaça.

Molecular Networking and Cultivation Profiling Reveals Diverse Natural Product Classes from an Australian Soil-Derived Fungus Aspergillus sp. CMB-MRF324.

This study showcases the application of an integrated workflow of molecular networking chemical profiling (GNPS), together with miniaturized microbioreactor cultivation profiling (MATRIX) to successfully detect, dereplicate, prioritize, optimize the production, isolate, characterize, and identify a diverse selection of new chemically labile natural products from the Queensland sheep pasture soil-derived fungus Aspergillus sp. CMB-MRF324. More specifically, we report the new tryptamine enamino tripeptide aspergillamides E-F (7-8), dihydroquinoline-2-one aflaquinolones H-I (11-12), and prenylated phenylbutyrolactone aspulvinone Y (14), along with an array of known co-metabolites, including asterriquinones SU5228 (9) and CT5 (10), terrecyclic acid A (13), and aspulvinones N-CR (15), B (16), D (17), and H (18). Structure elucidation was achieved by a combination of detailed spectroscopic and chemical analysis, biosynthetic considerations, and in the case of 11, an X-ray crystallographic analysis.

The Caseous lymphadenitis Increases the Vulnerability of the Sheep Herders in Algeria (Case of the Ziban-East Province)

The pastoral sheep system in Algeria is organized on the sale, particularly to male over six months old, on the occasion of the religious festivities. For the sake of its wide emergence and enormous economic losses, Caseous lymphadenitis (CLA) can put this type of animal production suffering and its sustainability may be in suspicion. The aim of this study was to estimate the prevalence ratio of CLA in Algeria (case of Ziban- East province). A cross-sectional epidemiological survey was undertaken (January 2021 to Mai 2021) on 33 randomly selected sheep farms conducted in extensive pastoral care. On the basis of clinical examination of 7265 sheep (1150 male and 6115 female), the farm level infection with CLA in the target area was estimated to be 87.88% [95% confidence interval (CI):71.8- 96.6 %]. The disease was significantly higher in males (7.22%) than in females (4.67%) (χ 2 test, P< 0.005). Moreover, sheep between 6 and 24 months old were significantly the more infected (14%) (F test, P< 0.01). We concluded that C. lymphadenitis infection is widely disseminated in sheep flocks in Ziban-East in Algeria and eradication programs are very necessary.

Walking distance and maintenance energy requirements of sheep during mountain pasturing (transhumance)

Sheep pasturing has become an important means for landscape management and conservation in marginal areas of mountain regions by reducing succession with dwarf shrubs and bushes, thus creating space for valuable forage grasses. Furthermore, mountain sheep pasturing for meat production also contributes to local food security. However, little is known about the energetic expenditures of sheep during mountain pasturing, which is important information for optimizing the productivity and economic efficiency, environmental aspects (e.g., biodiversity) as well as animal welfare. Therefore, the aim of the following study was to estimate the maintenance energy requirements of ewes over the whole mountain pasturing period (transhumance) considering movement patterns assessed by using satellite-based Global Positioning System (GPS) tracking devices. Energy requirements for walking increased rapidly at the beginning of transhumance (May - June), which could be explained by the longer walked distance and by overcoming variable altitude during that phase. Walking speed was slower compared to previous findings due to the difficult terrain of mountain pastures on which sheep moved. Energy demand for walking was strongly correlated with walking distance and walking speed. Results out of this study contribute in promoting the efficiency and consequently the rentability of alpine sheep pasturing systems. The latter ensures the production of local food and further preserves the ecosystem services linked to this low-input production system.

Using Pruning-Based YOLOv3 Deep Learning Algorithm for Accurate Detection of Sheep Face.

Simple SummaryThe identification of individual animals is an important step in the history of precision breeding. It has a great role in both breeding and genetic management. The continuous development of computer vision and deep learning technologies provides new possibilities for the establishment of accurate breeding models. This helps to achieve high productivity and precise management in precision agriculture. Here, we demonstrate that sheep faces can be recognized based on the YOLOv3 target detection network. A model compression method based on K-means clustering algorithm and combined with channel pruning and layer pruning is applied to individual sheep identification. In addition, the results show that the proposed non-contact sheep face recognition method can identify sheep quickly and accurately.Accurate identification of sheep is important for achieving precise animal management and welfare farming in large farms. In this study, a sheep face detection method based on YOLOv3 model pruning is proposed, abbreviated as YOLOv3-P in the text. The method is used to identify sheep in pastures, reduce stress and achieve welfare farming. Specifically, in this study, we chose to collect Sunit sheep face images from a certain pasture in Xilin Gol League Sunit Right Banner, Inner Mongolia, and used YOLOv3, YOLOv4, Faster R-CNN, SSD and other classical target recognition algorithms to train and compare the recognition results, respectively. Ultimately, the choice was made to optimize YOLOv3. The mAP was increased from 95.3% to 96.4% by clustering the anchor frames in YOLOv3 using the sheep face dataset. The mAP of the compressed model was also increased from 96.4% to 97.2%. The model size was also reduced to 1/4 times the size of the original model. In addition, we restructured the original dataset and performed a 10-fold cross-validation experiment with a value of 96.84% for mAP. The results show that clustering the anchor boxes and compressing the model using this dataset is an effective method for identifying sheep. The method is characterized by low memory requirement, high-recognition accuracy and fast recognition speed, which can accurately identify sheep and has important applications in precision animal management and welfare farming.

Farmers' perception on the control of gastrointestinal parasites in organic and conventional sheep production in Sweden.

A questionnaire was sent to sheep owners in Sweden to get information about anthelmintic drug use. The survey also investigated how respondents experienced problems with gastrointestinal nematode infections (GIN) focusing on Haemonchus contortus. The response rate was 31% and included both conventional and organic farms. The use of anthelmintics was low (45%), among which a majority (76%) drenched ewes on a single occasion, mostly with ivermectin (59%) followed by albendazole (19%). Other drugs were used rarely, however, unawareness of GIN risk was high (19%), especially among respondents with few animals. Anthelmintic dose calculations were done after visual appraisal by 63% and 22% calibrated the equipment before drug delivery, which is worrying since underdosing is a risk factor for the development of anthelmintic resistance. Like with anthelmintics, the perceived risk for GIN increased with herd size both by conventional and organic farmers. Faecal examination for the presence of GIN was done by 65% of the respondents and, among their sheep, H. contortus was or had been diagnosed in 41% of the herds. Irrespective of new stock had been imported from other countries or not, common problems were reported by 5% and 7% of the organic and conventional producers, respectively. Land use and grazing management strategies differed more in relation to herd size than by production form, with a majority (47%) having their sheep grazed in several paddocks, or at least the lambs were moved when separated from the ewes at weaning (25%). In contrast set stocked grazing was mainly reported on smaller farms. Co-grazing with cattle and horses were also frequently reported irrespective of production form, but with cattle to a somewhat greater degree on larger organic farms. Wild cervids, especially roe deer, were frequently observed on sheep pastures (87%). The veterinary involvement was higher on organic (65%) than on conventional farms (53%), and only 5% considered advice unimportant. Still, some conventional and organic producers treated sheeps routinely without a prior diagnosis, against the national regulations. 46% of the respondents drenched new and replacement stock. In conclusion, although some differences were observed between conventional and organic producers, the divergences were mainly due to herd size categories. Furthermore, despite a high veterinary involvement, we identified factors which can contribute to anthelmintic use, such as poor quarantine procedures, and deworming routines that can contribute to anthelmintic resistance in H. contortus.

Ground nesting Capped Wheatear Oenanthe pileata in the Western Cape South Africa

Capped Wheatear Oenanthe pileata is a medium sized passerine that readily inhabits agricultural landscapes. Several Oenanthe species occur worldwide, many of which are considered cavity nesters. Here I present what is to my knowledge the first recorded case of a nest built above ground versus in a rodent tunnel or sheltered under a structure. The wheatear nest was located on the ground in a sheep pasture on the 21st of October 2021 20 km south of Swellendam in the Western Cape, South Africa. No structure or foliage covered the nest. The nest was discovered during construction. The female laid a total of three eggs over the following five days. The eggs were a very pale blue with two having fine dark black ‘scribble’ marks on the shells. The nest failed six days after discovery, presumably trampled by grazing sheep. Despite having failed, this record does suggest a degree of flexibility in the nesting requirements of Capped Wheatears. The ability to exploit novel nesting habitats should be to the advantage of a species inhabiting rapidly changing landscapes.

Cattle grazing results in greater floral resources and pollinators than sheep grazing in low-diversity grasslands.

Land‐use and land‐cover change associated with agriculture is one of the main drivers of biodiversity loss. In heavily modified agricultural landscapes, grazing lands may be the only areas that can provide essential resources for native grassland species. Management decisions, such as choice of livestock species, affect the extent to which grazing lands provide suitable habitat for native species such as pollinators.Our study compared how sheep versus cattle herbivory affected floral resources and butterfly abundance across low‐diversity, former Conservation Reserve Program (CRP) pastures managed with patch‐burn grazing.Across all years (2017–2019), flowering species richness and abundance were significantly higher in cattle pastures than sheep pastures. On average, we recorded 6.9 flowering species/transect in cattle pastures and 3.8 flowering species/transect in sheep pastures. The average floral abundance per transect was 1278 stems/transect in cattle pastures and 116 stems/transect in pastures grazed by sheep.Similarly, we observed higher butterfly species richness, diversity, and abundance in cattle than in sheep pastures. In cattle pastures, we observed an average of 75 butterflies and 6.75 species per transect, compared with an average of 52 butterflies and 3.37 species per transect in sheep pastures. However, the butterfly community composition did not significantly differ between grazing treatments likely because agricultural‐tolerant, habitat generalists comprised the majority of the butterfly community. Five generalist butterflies comprised 92.3% of observations; Colias philodice was the most abundant (61% of observations). Speyeria idalia and Danaus plexippus, two butterflies of conservation concern, comprised less than 0.5% of butterfly observations.Our results, which are among the first attempt quantifying butterfly use of post‐CRP fields grazed by livestock, show that increased precipitation and cattle grazing promoted higher forb abundance and richness. However, additional interventions may be needed to enhance floral resources to sustain and improve pollinator diversity in these landscapes.