Geographical Markers Research Articles

Integrating mineral elements and metabolite features to distinguish Lotus seeds from different geographic origins

The characteristics of lotus seeds (LS) are influenced by variety and environment. However, it remains unknown the difference of metabolites and elements of LS from different origins. In this study, an accurate quantification method (97–107 %) for 20 mineral elements in LS was developed, and a metabolomic method was established to identify a total of 323 metabolites in LS. Mineral composition analysis revealed significant variations in the mineral element contents among LS samples from seven geographical regions. LS were rich in potassium (14,710 mg/kg), manganese (67.19 mg/kg), with a low level of sodium (210 mg/kg). A total of 10 mineral elements and 117 metabolites (p < 0.05 and VIP > 1) were identified as the potential geographical markers of LS by integration analysis. The linear discriminant analysis model showed high prediction accuracy. This study provides strong experimental evidence to maintain the authenticity and quality of LS in the food industry.

Fisheries shocks provide an opportunity to reveal multiple recruitment sources of sardine in the Sea of Japan

The abrupt decline in sardine catches in the Sea of Japan and the East China Sea (SJ-ECS) in 2014 and 2019 and the recovery in the following years call into question the current assumption that sardines in the SJ-ECS form a self-recruiting subpopulation. To test this hypothesis, we analysed otolith stable oxygen and carbon isotope profiles (δ18O, δ13C) of age-0 and age-1 sardines from 2010 and 2013–2015 year-classes captured in the SJ-ECS, as geographic markers for nursery areas. Age-0 sardines generally showed a significant ontogenetic decrease in otolith δ18O from larval to juvenile stages. However, the majority of age-1 captured in spring 2011, 2015 and 2016 showed non-decreasing otolith δ18O profiles, suggesting that the age-0 off the Japanese coast were not the main source of recruitment. Different migration groups were thus indicated: the “locals” growing up off the Japanese coast and the migrating “nonlocals”. The isotope profiles of the “nonlocals” overlapped with those of age-0 captured in the subarctic North Pacific, suggesting that they may be migrants from the Pacific, or perhaps an unobserved northward migration group in the SJ-ECS. Our results highlight the considerable uncertainty in the population structure assumed in current stock assessment models for Japanese sardine.

A comparative analysis of the ballads of V.A. Zhukovsky, J.G. Byron and V.M. Hugo

The object of this study is the ballads of V.A. Zhukovsky, J. Byron and V.M. Hugo. The purpose of the work: to conduct a comparative analysis of "Lyudmila" by V.A. Zhukovsky, "The Bride of Abydos" by J. Byron and "The Bride of the Timpani Player" by V.M. Hugo. The material basis of the study was the work of the following authors: R.S. Buurma, B.M. Gasparov, Z.N. Bakalova, A.S. Bakalova. The article examines the role of epigraphs in ballads; analyzes how fantastic images are reflected in the ballads of V.A. Zhukovsky, J. Byron and V.M. Hugo; the difference between the poetic dimensions of works is noted; analyzes how historical, geographical and temporal markers are represented in ballads. The ballads of Byron and Hugo also differ in their relation to romantic ideals. Byron placed the loneliness and torment of the hero at the center of his ballads, and also reflected in them his negative attitude towards society and power. Hugo, on the contrary, preached the ideals of struggle and freedom, heroic overcoming of difficulties. The article examines aspects of the study of the ballad genre in Russian and Western European romanticism. The Russian ballad is largely influenced by folklore ballads, both national and Western European, and represents a heterogeneous genre formation. The ballads of Byron and Hugo also differ in their relation to romantic ideals. Byron put the loneliness and torment of the hero at the center of his ballads, and also reflected in them his negative attitude towards society and power. Hugo, on the contrary, preached the ideals of struggle and freedom, heroic overcoming of difficulties and catastrophes, which resonated in the hearts of many of his contemporaries. A comparative examination of the poems "The Bride of Abydos" by George Gordon Byron and "Lyudmila" by Vasily Andreevich Zhukovsky allows us to look at both works through the prism of romantic literature, to identify their distinctive features and the general context of the era in which they were created. The main difference between the two poems lies in the cultural contexts in which the plots develop. Based on the above, we conclude that the ballads of V.M. Hugo, J. Byron and V.A. Zhukovsky demonstrate the presence of both similarities and differences.

The combination of HSI and NMR techniques with deep learning for identification of geographical origin and GI markers of Lycium barbarum L.

Lycium barbarum L. (L. barbarum) is renowned worldwide for its nutritional and medicinal benefits. Rapid and accurate identification of L.barbarum's geographic origin is essential because its nutritional content, medicinal efficacy, and market price significantly vary by region. This study proposes an innovative method combining hyperspectral imaging (HSI), nuclear magnetic resonance (NMR), and an improved ResNet-34 deep learning model to accurately identify the geographical origin and geographical indication (GI) markers of L.barbarum. The deep learning model achieved a 95.63% accuracy, surpassed traditional methods by 6.26% and reduced runtime by 29.9% through SHapley Additive exPlanations (SHAP)-based feature selection. Pearson correlation analysis between GI markers and HSI characteristic wavelengths enhanced the interpretability of HSI data and further reduced runtime by 33.99%. This work lays the foundation for portable multispectral devices, offering a rapid, accurate, and cost-effective solution for quality assurance and market regulation of L.barbarum products.

Phenolic Profiles in Olive Leaves from Different Cultivars in Tuscany and Their Use as a Marker of Varietal and Geographical Origin on a Small Scale.

Olive leaves are a rich source of polyphenols with healthful properties and represent one of the most abundant waste products of olive oil production. The aims of this study were to explore the phenolic composition of olive leaves from the three main Tuscan cultivars (Leccino, Moraiolo and Frantoio) collected in Siena and Grosseto provinces and to investigate the possible use of these compounds as varietal and geographic origin markers. Discriminant factorial analysis (DFA) was used for distinguishing between different cultivars and locations. Apigenin and caffeoyl-secologanoside showed significant differences between cultivars. DFA showed that ligstroside, apigenin and luteolin have the most influence in determining the differences between sites, whereas total polyphenols, olacein and hydroxytyrosol acetate allowed for separation between leaves from the same province. The results of the present study indicate that concentrations of phenolic compounds, measured through high-resolution mass spectrometry, can be used as a marker for both the cultivar and of geographical origin of olive leaves, and possibly of olive-related products, as well as across small geographic scales (less than 50 km distance between sites).

P-719 The fertility clinic landscape in England 2012-2017: a study of the impact of clinic size and environment on success rates

Abstract Study question How are fertility clinics in England distributed and has this changed over time? Does clinic size, geography and local deprivation level influence live birth rates? Summary answer A clinic’s size, urban/rural environment and local deprivation level shows no statistically significant impact on a clinic’s live birth rates. What is known already It has been established that children born through assisted reproduction are more likely to have parents from higher socioeconomic groups compared to those conceived through natural conception. However, studies examining the relationship between socioeconomic status and fertility treatment success rates have varied outcomes and occasionally conflicting results. There has so far been little research internationally as to whether geographical, environmental and socioeconomic markers influence fertility treatment outcomes on a national scale. Study design, size, duration Publicly available HFEA data from 2012 to 2017 for all registered clinics in England was accessed. The total number of IVF/ICSI cycles for all age groups and live birth rate per embryo transferred were recorded. 56 clinics (32,091 treatment cycles) were recorded in 2012, rising to 69 clinics (36,638 treatment cycles) in 2017. Clinic postcode was used to determine Rural-Urban Classification and postcode-level and local authority-level deprivation according to the Index of Multiple Deprivation (IMD). Participants/materials, setting, methods Statistical analysis was performed using R Statistical Software and Datawrapper was used to generate map infographics. Clinic size was categorised by the number of IVF/ICSI cycles conducted per year – small (0-499), medium (500-999) and large (&amp;gt;1000). Clinic environment was classified as urban or rural and IMD was used to categorise clinics into deprivation quintiles. Weighted live birth rates were analysed to determine any difference in clinic success based on its size and environment. Main results and the role of chance The majority of clinics conducted between 0-499 IVF/ICSI cycles per year. There was no statistically significant difference in the live birth rate per embryo transferred based on clinic size with an average success rate of 31.8% in small clinics, 33.9% in medium clinics and 32.2% in large clinics (p-value 0.885). A large proportion of clinics were located in London (28-29% of clinics and 34-40% treatment cycles) between 2012 and 2017 despite only ∼16% of the population of England living in London. There were significantly fewer clinics (p-value 0.047) and treatment cycles (p-value &amp;lt;0.001) conducted in rural, compared to urban locations. There was a small, but not statistically significant, increase in success rate in clinics located in the least, compared to most deprived quintile. The difference in average live births/embryo transferred between the most and least deprived quintile across all years studied was 3.8% (31.1% in most deprived vs 34.9% in least deprived, p-value 0.227). There was also no statistical difference between the live birth rates per embryo transferred across the local-authority deprivation quintiles, although there was a trend for slightly higher success rates in the least deprived quintile compared to most deprived quintile. (30.3% compared to 33.9% (p-value 0.211)). Limitations, reasons for caution Clinic postcode only was used, therefore deprivation may not be representative of the whole population it treats. All IVF/ICSI treatments for all age groups were included, but some clinics may treat an older population of patients. Many IVF laboratories have satellite clinics in surrounding areas, whose postcodes were not included. Wider implications of the findings It is reassuring that local environment and deprivation do not significantly impact on clinic success rates. More detailed analysis of individual patient data on a nationwide level is required to understand this further either through access to primary care records or collaboration between clinics. Trial registration number not applicable

He niwan geeode þa fyrran Fresan: Geographical Marker or Literary Topos in the Old English Bede?

Abstract In his Historia ecclesiastica gentis Anglorum, V.10, Bede apparently introduced a two- fold division of Frisia when he called Frisia citerior the region to where Ecgberht sent missionaries. Neither Bede nor the Old English translator of Bede’s work offer a precise identification of the region at issue; moreover, the passage does not mention a possible counterpart, that is, Frisia ulterior. While Bede uses Frisia citerior, the translator refers to fyrran Fresan. An analysis of possible sources does not yield any parallel to Bede’s reference, nor to the use of the term as a geographically identifiable territory. On the other hand, the use of Old English feorr in similar geographical contexts, whether in translations or original texts, vouches for a free and imaginative employment of the comparative fyrran, which was not used as a precise geographical marker. This essay suggests that the mission to Frisia, which was of great importance in both Bede’s narrative and the Lives of missionaries, such as that of Willibrord, had the effect of striking the translator’s imagination. He chose a suggestive term, rich in connotations, rather than supplying a geographical identifiable information.

Comparison of data processing strategies using commercial vs. open-source software in GC-Orbitrap-HRMS untargeted metabolomics analysis for food authentication: thyme geographical differentiation and marker identification as a case study

Untargeted analysis of gas chromatography–high-resolution mass spectrometry (GC-HRMS) data is a key and time-consuming challenge for identifying metabolite markers in food authentication applications. Few studies have been performed to evaluate the capability of untargeted data processing tools for feature extraction, metabolite annotation, and marker selection from untargeted GC-HRMS data since most of them are focused on liquid chromatography (LC) analysis. In this framework, this study provides a comprehensive evaluation of data analysis tools for GC-Orbitrap-HRMS plant metabolomics data, including the open-source MS-DIAL software and commercial Compound Discoverer™ software (designed for Orbitrap data processing), applied for the geographical discrimination and search for thyme markers (Spanish vs. Polish differentiation) as the case study. Both approaches showed that the feature detection process is highly affected by unknown metabolites (Levels 4–5 of identification confidence), background signals, and duplicate features that must be carefully assessed before further multivariate data analysis for reliable putative identification of markers. As a result, Compound Discoverer™ and MS-DIAL putatively annotated 52 and 115 compounds at Level 2, respectively. Further multivariate data analysis allowed the identification of differential compounds, showing that the putative identification of markers, especially in challenging untargeted analysis, heavily depends on the data processing parameters, including available databases used during compound annotation. Overall, this method comparison pointed out both approaches as good options for untargeted analysis of GC-Orbitrap-HRMS data, and it is presented as a useful guide for users to implement these data processing approaches in food authenticity applications depending on their availability.Graphical

Morphological Variation in the Shape of Tongue: A Potential Geographical Marker

Introduction- The human tongue is of great significance to forensic odontologists. It aids in identification. Studies about variations in the morphological shape of the tongue are extremely rare among pediatric populations. This study aimed to observe the morphological variations in the shape of the tongue among pediatric population of the age group of 10-13 years in Gujarat, India. It also aimed to determine the gender predilection for each type of the shape of the tongue. Research Methods- A cross-sectional study was conducted among 400 children (n=400) of the age group of 10-13 years in a dental camp in Gandhinagar, Gujarat. Visual examination and evaluation of the shape of the tongue was done individually for all the children followed by digital documentation and statistical analysis in Microsoft Excel 2019. Results- Out of 400 subjects, 200 (50%) were males and 200 (50%) were females. Seven shapes of the tongue were observed that included- acute triangular, obtuse triangular, elliptical, round, rectangular, square and bifid tongue. Gender distribution was observed among all shapes of the tongue. The acute triangular tongue was predominantly found in 114 individuals (28.5%) of the entire study population that showed a female predilection. The non-syndromic bifid tongue was also observed in 48 individuals (12%) of the entire population with a male predilection. Conclusion- Gender distribution in the shapes of the tongue varies in different geographical locations. More such research studies need to be carried out among the pediatric populations of different regions of the world.

Geographical component of the chronotope of the English scientific discourse and the forms of its representation

The article deals with the geographical component of the chronotope of the English scientific discourse. The authors identify the forms of geographical representation of the chronotope of scientific discourse, determine the degree of identifiability of these forms, and also explore the significance of the geographical component of the chronotope in the categorization of scientific discourse. 112 English scientific articles from 4 disciplinary areas (linguistics, literature, economics, biology) published in scientific periodicals are used as practical material. In the course of the study, the authors discover three types of geographical markers used in the texts of scientific discourse: the topos of publishing a scientific work, the topos of writing a scientific work, and the topos of the object, subject and material of the study (intratext topos). The authors analyze the degree of identification of each type of markers in scientific texts, and also conduct a comparative analysis of these markers. The level of coincidence of the topos of the publication, the topos of writing and the topos of the object of study is investigated. As a result of the analysis, the authors observe a low level of interdependence of geographical markers, which suggests that the geographical component of the chronotope is of little importance for the categorization of a scientific text. On the basis of the data obtained, the authors believe that the geographical markers of a scientific text should be perceived as elements of the formal and technical design of a scientific text, and not as its constituent characteristic. In conclusion, the authors give a number of directions for further considering the constituent topos in the chronotope of scientific discourse, in particular, its disciplinary and thematic component.

Characterization of Flavor Profiles of Cigar Tobacco Leaves Grown in China via Headspace-Gas Chromatography-Ion Mobility Spectrometry Coupled with Multivariate Analysis and Sensory Evaluation.

Although cigar tobacco leaves (CTLs) have a high economic value, research regarding the flavor characteristics of CTLs is currently limited. A comprehensive study of the flavor characteristics of CTLs from different regions of China was conducted by identifying their volatile-flavor-containing compounds (VFCs) and flavors. The samples were analyzed via gas chromatography-ion mobility spectrometry (GC-IMS) and sensory evaluation. Results revealed considerable differences in the VFC contents of CTLs from different regions of China, suggesting that the VFLs of CTLs could be influenced by geographical origin. Mainly, phenols, pyrazines, and aldehydes were present in the CTLs from Sichuan. High contents of esters and pyrazines were present in the CTLs from Hubei, while esters were the major components of the CTLs from Hainan. Multivariate analysis results showed the effective differentiation of samples from different geographical origins based on the GC-IMS results. Sensory evaluation revealed that the flavors of CTLs from different geographical origins were different. 1,8-Pinene, 3-methyl-3-butene-1-ol, 2,3-dimethyl-5-ethylpyrazine, 4-methyl-3-penten-2-one, and (E)-2-pentenal might serve as geographical marker compounds, indicating the geographical origin of CTLs based on the results of GC-IMS and sensory evaluation. This study may be beneficial for the trade of CTLs and the development of cigar products.

Sociological and geographical markers in favour of a distance and potential availability score for the children of the very elderly

Old age is a time of emotional, social and physiological challenges. The role of the family remains essential in coping with these challenges. This is particularly true of non-cohabiting children, who in 2020 accounted for just under half of all those helping elderly people with loss of autonomy and/or pathologies. Following on from sociological research on close caregivers, this article first looks at the level and influence of children's relationships and assistance towards their elderly parents, and then proposes the construction of a territorial indicator - in this case, a score - to measure the spatial proximity and potential availability of children. Subject to further development, this indicator represents a first milestone in the territorial understanding of children's relationships with and help for their elderly parents.

The 1955 Japanese mission to New Guinea

In January 1955, an official mission departed Japan for New Guinea to collect remains of the war dead and to erect commemorative monuments to fallen soldiers. Just before its departure, a diplomatic contretemps arose about the English wording on the Japanese stones: the Japanese government considered them memorials to the dead, whereas the Australian government insisted that they be mere geographical markers noting the search for remains. This article examines how the divergent politics of commemoration in Japan and Australia created this dispute, demonstrating how the remains of soldiers functioned as important signifiers well beyond their material existence. In Japan, the search for remains spoke to the nature of national duty, the acknowledgement of mourning and the possibilities for atonement. In Australia, however, they stimulated visceral resentment, because the soldiers’ remains symbolised Japanese aggression and war crimes.

S. H. Manto’s legendary contribution to partition of India

The brutality and anguish of the Indian partition drastically altered the social and political development of the Indian subcontinent, and its effects can still be felt today. Along with the deaths and damage, the incident also left a lasting psychological scar on the minds of millions of individuals, particularly the minds of women and children. No writer of the time and its aftermath could escape the age of foolishness, the season of darkness and the time of despair. It is difficult to sweep beneath the rug actual acts of kidnapping, uprooting, train raids, trauma, Insanity, suicide, murder, and the acts of destruction. Both Hindus and Muslims on either side of the Borders, which were once porous and shared by the community, were impacted by the violent riots and massacres that followed. Many more people were displaced, endured poverty, were raped, were subjected to brutality, suffered bodily and mental anguish, and millions of people lost their lives. The bloody mayhem that occurred both during and after the partition drowned out the victims’ cries.Several writers, authors, and poets, including Saadat Hasan Manto, let these stifled voices be heard. Manto, an Indian-born Pakistani writer who immigrated to Pakistan after the country’s independence, brought the horrific facts of Partition to light clearly and uncomfortable. Indeed, the cataclysmic event of India's partition had a profound effect on the society, culture, and literature of the nation. That was a particular trauma that destroyed the lives of regular people. Manto’s representation of the partition violence pinches the intellect rather than appeal to the emotion. It is highly realistic and achieves remarkable objectivity, for it neither shows any biasedness for contending nationalisms of the traumatic times, nor hide own socialism or specific cultural visibility, nor any geographical, political or religious markers. It does not either present detailed characterization or grant the narrator hide authorial voice.

Origin tracing and adulteration identification of bird's nest by high- and low-field NMR combined with pattern recognition

Edible bird’s nest (EBN) is a high-value health food with various nutrients and bioactive components. With increasing demand for EBN, they are often adulterated with cheaper ingredients or falsely labeled by the origin information, thus harming consumer interests. In this study, high- and low-field nuclear magnetic resonance (HF/LF-NMR) technology combined with multivariate statistical analysis was used to identify the geographical marker of EBN from different origins and authenticate the adulterated EBN with various adulterants at different adulteration rates. Authentic EBN samples from Malaysia were used to simulate adulteration using gelatin (GL), agar (AG) and starch (ST) at 10 %, 20 %, 40 %, 60 %, 80 %, and 100 % w/w, respectively. The results showed significant differences in composition among EBN from different origins, with isocaproate and citric acid serving as geographical markers for Malaysia and Vietnam, respectively. Leucine, glutamic acid, and N-acetylglycoprotein serving as geographical markers for Indonesia. In addition, PLS model further verified the accuracy of origin identification of EBN. The LF-NMR results of adulteration EBN showed a linear correlation between the transverse relaxation (T2, S2) and the adulterated ratio. The OPLS-DA based on T2 spectra could accurately identify authentic EBN from adulterated with GL, AG and ST at 40 %, 20 %, and 20 %, respectively. Fisher discrimination model was able to differentiate at 20 %, 20 %, and 40 %, respectively. These results show that the 1H NMR combined with multivariate statistical analysis method could be a potential tool for the detection of origin and adulteration of EBN.

In Silico Primer Design for geographical detection of Apis florea using Cytochrome c oxidase subunit 1 (COX1) gene

The yellow dwarf honey bee, Apis florea are well distributed in South Asia to South East Asia. This species is expanded and introduce area from their original distribution. However, the distribution of this honey bee in Indonesia is unexplored. The cytochrome c oxidase subunit 1 (COX1) gene are success to detect original geographic of introduce A. florea found in Egypt. The A. florea specific primer of COX1 gene are needed to produce the molecular marker for geographical origin detection. Thus, this study aims to in silico design the COX1 gene primer of A. florea using Primer3 and Primer-BLAST. This study results the best candidate primer of Af6_COX1_F and Af6_COX1_R primers that start from 212 to 983 regarding the A. florea COX1 gene (NC_021401) and produce 772 bp of amplicon. The melting temperature of forward primer are 54. 63 and 55.58°C, GC content of 40 and 45%, GC clamp of 3 and 2 for forward and reverse primer, respectively. There are no secondary structure of those primer and 100% homolog with A. florea COX1 sequences, thus those primer is potentially as the geographical origin marker of A. florea.

Untargeted Metabolomics Analysis Revealed the Difference of Component and Geographical Indication Markers of Panax notoginseng in Different Production Areas.

Panax notoginseng (P. notoginseng) has excellent medicinal and food dual-use characteristics. However, P. notoginseng with a unique origin label has become the target of fraud because of people confusing or hiding its origin. In this study, an untargeted nuclear magnetic resonance (NMR)-based metabolomics approach was used to discriminate the geographical origins of P. notoginseng from four major producing areas in China. Fifty-two components, including various saccharides, amino acids, saponins, organic acids, and alcohols, were identified and quantified through the NMR spectrum, and the area-specific geographical identification components were further screened. P. notoginseng from Yunnan had strong hypoglycemic and cardiovascular protective effects due to its high acetic acid, dopamine, and serine content, while P. notoginseng from Sichuan was more beneficial for diseases of the nervous system because of its high content of fumarate. P. notoginseng from Guizhou and Tibet had high contents of malic acid, notoginsenoside R1, and amino acids. Our results can help to distinguish the geographical origin of P. notoginseng and are readily available for nutritional recommendations in human consumption.

Untargeted 1H NMR-based metabolomics and multi-technique data fusion: A promising combined approach for geographical and processing authentication of thyme by multivariate statistical analysis

Thyme is a culinary herb highly susceptible to increasing mislabeling occurring in the spice industry. In this study, proton nuclear magnetic resonance spectroscopy (1H NMR) combined with multivariate statistics was successfully applied with two authenticity purposes: (1) tracing thyme metabolic differences among three relevant geographical regions (Morocco, Spain, and Poland), and (2) assessing the influence of sterilization processing on the metabolic fingerprint. Multivariate data analysis provided six and seven key geographical and processing markers, respectively, including thymol, organic acids, chlorogenic acid, and some carbohydrates (e.g., sucrose). Additionally, for the first time, a mid-level data fusion approach was tested for thyme authenticity combining three complementary and synergic analytical platforms: gas and liquid chromatography coupled with high-resolution mass spectrometry, and 1H NMR spectroscopy, providing a comprehensive metabolomics insight into the origin and processing effects on thyme fingerprinting, and opening the path to new metabolomics approaches for quality control in the spice industry.

Una herida abierta: Considerations for (re)theorizing the border in teaching and research

No term defined the last U.S. presidency, and public discourse accompanying it, more so than “the Wall” and, with it, the U.S.-Mexico border more broadly. That discourse, however, has mostly been characterized by an a-historic, unproblematized, and under-theorized notion of “border.” Our experiences as curriculum scholars and teacher educators have illustrated that a similar stance about the border has taken place in public education. We begin from the assumption that the border is very real, but it is socially constructed and maintained, and impacts different groups differently. Borders are thus not only geographic markers but political, cultural, economic, and psychological disruptors of places and those living in them. In order to better understand these complex dimensions, we engage in an extended analysis of two cases, the U.S.-Mexico border and the internal displacement of the Rohingya of Myanmar, building upon prior theorizing by considering both the discursive and affective dimensions of each and implications for curriculum and pedagogy. The paper concludes with suggestions for applying these considerations in practice and questions for future inquiry.

Can routine data be used to estimate the mental health service use of children and young people living on Gypsy and Traveller sites in Wales? A feasibility study.

Gypsies and Travellers have poorer physical and mental health than the general population, but little is known about mental health service use by Gypsy and Traveller children and young people. Finding this group in routine electronic health data is challenging, due to limited recording of ethnicity. We assessed the feasibility of using geographical markers combined with linked routine datasets to estimate the mental health service use of children and young people living on Traveller sites. Welsh Government supplied a list of Traveller site postcodes included in Caravan Counts between 2012 and 2020. Using spatial filtering with data from the Adolescent Mental Health Data Platform (ADP) at Swansea University's SAIL Databank, we created a cohort of Traveller site residents aged 11-25 years old, 2010-2019. ADP algorithms were used to describe health service use, and to estimate incidence and prevalence of common mental disorders (CMD) and self-harm. Our study found a subgroup of young Gypsies and Travellers (n = 802). We found no significant differences between our cohort and the general population for rates of CMD or self-harm. The rate of non-attendance for psychiatric outpatient follow-up appointments was significantly higher in our cohort. Rates were higher (but not statistically significant) among Gypsies and Travellers for measures suggesting less well-managed care, including emergency department attendance and prescribed CMD medication without follow-up. The small size of the cohort resulted in imprecise estimates with wide confidence intervals, compared with those for the general population. Gypsies and Travellers are under-represented in routine health datasets, even using geographical markers, which find only those resident in authorised traveller sites. Routine data is increasingly relied upon for needs assessment and service planning, which has policy and practice implications for this underserved group. To address health inequalities effort is required to ensure that health datasets accurately capture ethnicity.