Nomadic Movements Research Articles

The contribution of movement to social network structure and spreading dynamics under simple and complex transmission.

The structure of social networks fundamentally influences spreading dynamics. In general, the more contact between individuals, the more opportunity there is for the transmission of information or disease to take place. Yet, contact between individuals, and any resulting transmission events, are determined by a combination of spatial (where individuals choose to move) and social rules (who they choose to interact with or learn from). Here, we examine the effect of the social-spatial interface on spreading dynamics using a simulation model. We quantify the relative effects of different movement rules (localized, semi-localized, nomadic and resource-based movement) and social transmission rules (simple transmission, anti-conformity, proportional, conformity and threshold rules) to both the structure of social networks and spread of a novel behaviour. Localized movement created weakly connected sparse networks, nomadic movement created weakly connected dense networks, and resource-based movement generated strongly connected modular networks. The resulting rate of spreading varied with different combinations of movement and transmission rules, but-importantly-the relative rankings of transmission rules changed when running simulations on static versus dynamic representations of networks. Our results emphasize that individual-level social and spatial behaviours influence emergent network structure, and are of particular consequence for the spread of information under complex transmission rules.This article is part of the theme issue 'The spatial-social interface: a theoretical and empirical integration'.

Local resource availability drives habitat use by a threatened avian granivore in savanna woodlands.

Conserving threatened species relies on an understanding of their habitat requirements. This is especially relevant for granivorous birds, whose habitat use and movement patterns are intricately linked to the spatial and temporal availability of resources such as food and water. In this study, we investigated the habitat use, home range and daily activity patterns of the Endangered Southern Black-throated Finch (SBTF; Poephila cincta cincta) within a 75,000 ha savanna woodland study area in northeastern Australia. This semi-arid region is one of the key remaining strongholds for the species and is characterised by substantially different habitat and climatic conditions than areas where previous research on this species has been undertaken. We radio tracked 142 SBTF using both manual tracking and an array of 27 automated radio towers, which revealed a strong preference for eucalypt-dominated grassy woodland communities. The preference for these habitats also increased with decreasing distance to permanent water. While SBTF occupied large home ranges, individual SBTF were largely sedentary during the radio tracking period (21.8, range = 0.83-120 days), with few landscape-scale movements of more than 4.5 km. Daily foraging activity of SBTF exhibited bimodal peaks in the early morning and late afternoon, while other activities were greatest from the late morning to the early afternoon. Compared to other estrildid finches, our research suggests that SBTF track resources at a local scale across a large home range. We postulate that in times of resource scarcity SBTF may use dietary diversification, instead of landscape or regional-scale nomadic movements, to meet their resource needs. The species' movement patterns underscore the importance of local scale habitat management to facilitate resource availability throughout the year. Furthermore, our research helps target monitoring designs for granivorous birds that focus on the species' diurnal activity patterns.

Movement patterns of a small-bodied minnow suggest nomadism in a fragmented, desert river

BackgroundUnfettered movement among habitats is crucial for fish to access patchily distributed resources and complete their life cycle, but many riverscapes in the American Southwest are fragmented by dams and dewatering. The endangered Rio Grande silvery minnow (Hybognathus amarus, RGSM) persists in a fragmented remnant of its former range (ca. 5%), and its movement ecology is understudied.MethodsWe tracked movements of hatchery-reared RGSM, tagged with passive integrated transponder tags, using stationary and mobile antennas from 2019 to 2022. We quantified probability of movement and total distance moved by RGSM released above and below a dam. We then assessed how well two prevailing riverine movement theories (i.e., restricted movement paradigm [RMP] and colonization cycle hypothesis [CCH]) explained RGSM movement patterns.ResultsWe detected 36.8% of released RGSM (n = 37,215) making at least one movement. Movements were leptokurtic and substantially greater than expected based on the RMP for both stationary (1.7–5.9 m) and mobile (30.3–77.8 m) individuals. On average, RGSM were detected at large for 75 days and moved a total of 12.2 rkm within a year. The maximum total distance moved by RGSM was 103 rkm. Similarly, we observed a multimodal distribution of detected range sizes with a mean detected range of 2.4 rkm and a maximum detected range of 78.2 rkm. We found little support for an upstream movement bias, as expected under the CCH, and most movements (74%) were directed downstream.ConclusionsOur data suggest RGSM are highly mobile, with the ability to make long-distance movements. Neither movement theory adequately described movement patterns of RGSM; instead, our findings support a nomadic movement pattern and an apparent drift paradox matching recent studies of other pelagic-broadcast spawning minnows where populations persist upstream despite experiencing downstream drift as larvae. Resolution of the drift paradox may be achieved through further, targeted studies into different aspects of the species’ life history. Quantification of RGSM movement provides crucial insights into the species’ movement ecology and may help define the appropriate scale of recovery efforts.

Movements and habitat use of painted button-quail, Turnix varius, in tropical savanna of northern Queensland

Despite painted button-quail, Turnix varius, being one of Australia’s most common and widespread button-quail, knowledge of the species’ habitat use and movements is poor, and largely based on incidental observations. We GPS tracked eight painted button-quail individuals near Mareeba in northern Queensland during both dry (May to June 2020) and wet (January to February 2021) seasons. We found no evidence of nomadic or migratory movements; individuals occupied small home ranges (1.38–10.3 ha) and the species was present year-round. Differences in home-range size were detected between sexes and between seasons, likely reflecting the species’ polyandrous mating system. In both wet and dry seasons, painted button-quail occupied open savanna with a groundcover of native perennial tussock grasses. The home ranges of all tracked birds were associated mostly with ridges and slopes, although some use of alluvial flats was observed. The presence of perennial tussock grasses was consistent across the areas used by tracked individuals. In contrast to anecdotal reports, painted button-quail utilised areas with open groundcover (as low as 5% groundcover vegetation) as well as areas of dense cover (95% groundcover vegetation). Given that this is the first GPS-based movement study of any button-quail species, our findings provide potentially important insights into the daily and annual movements of this cryptic genus.

Prevalence and associated risk factors of peste des petits ruminants in selected districts of the northern border region of Pakistan

BackgroundPeste des Petits Ruminants (PPR) is a world organization for animal health (WOAH) notifiable and economically important transboundary, highly communicable viral disease of small ruminants. PPR virus (PPRV) belongs to the genus Morbillivirus of the family Paramyxoviridae.AimThe present cross-sectional epidemiological investigation was accomplished to estimate the apparent prevalence and identify the risk factors linked with peste des petits ruminants (PPR) in the previously neglected northern border regions of Pakistan.MethodA total of 1300 samples (serum = 328; swabs = 972) from 150 flocks/herds were compiled from sheep (n = 324), goats (n = 328), cattle (n = 324), and buffaloes (n = 324) during 2020–2021 and tested using ELISA for detection of viral antibody in sera or antigen in swabs.ResultsAn overall apparent prevalence of 38.7% (504 samples) and an estimated true prevalence (calculated by the Rogan and Gladen estimator) of 41.0% (95% CI, 38.0–44 were recorded in the target regions. The highest apparent prevalence of 53.4% (85 samples) and the true prevalence of 57.0%, 95% Confidence Interval (CI) were documented in the Gilgit district and the lowest apparent prevalence of 53 (25.1%) and the true prevalence of 26.0%, 95% Confidence Interval (CI), 19.0–33.0) was reported in the Swat district. A questionnaire was designed to collect data about associated risk factors that were put into a univariable logistic regression to decrease the non-essential assumed risk dynamics with a P-value of 0.25. ArcGIS, 10.8.1 was used to design hotspot maps and MedCalc’s online statistical software was used to calculate Odds Ratio (OR). Some of the risk factors significantly different (P < 0.05) in the multivariable logistic regression were flock/herd size, farming methods, nomadic animal movement, and outbreaks of PPR. The odds of large-sized flocks/herds were 1.7 (OR = 1.79; 95% Confidence Interval (CI) = 0.034–91.80%) times more likely to be positive than small-sized. The odds of transhumance and nomadic systems were 1.1 (OR = 1.15; 95% Confidence Interval (CI) = 0.022–58.64%) and 1.0 (OR = 1.02; 95% Confidence Interval (CI) = 0.020–51.97%) times more associated to be positive than sedentary and mixed farming systems, respectively. The odds of nomadic animal movement in the area was 0.7 (OR = 0.57; 95% Confidence Interval (CI) = 0.014–38.06%) times more associated to be positive than in areas where no nomadic movement was observed. In addition, the odds of an outbreak of PPR in the area were 1.0 (OR = 1.00; 95% Confidence Interval (CI) = 0.018–46.73%) times more associated to be positive than in areas where no outbreak of PPR was observed.ConclusionsIt was concluded that many northern regions considered endemic for PPR, large and small ruminants are kept and reared together making numerous chances for virus transmission dynamic, so a big threats of disease spread exist in the region. The results of the present study would contribute to the global goal of controlling and eradicating PPR by 2030.

Fluctuations in population size and migration of two species of crossbills in relation to seed crop size of spruce and pine: asymmetric importance of alternative food resources

Bird species depending on seeds from masting trees face large temporal and spatial variation in food availability and perform nomadic or irruptive movements to locate food. In northern Europe, the Common Crossbill (Loxia curvirostra) is specialized on seeds from Norway Spruce (Picea abies) which usually has peak years followed by crop failure. Common Crossbills breed in mast years and emigrate when spruce seeds are no longer available. On the other hand, the Parrot Crossbill (L. pytyopsittacus) is specialized on seeds from Scots Pine (Pinus sylvestris) in which seed production is more stable from year to year. The Parrot Crossbill is therefore thought to be more sedentary. However, both species may switch food if there is low abundance of their 'own' seed type, but little is known about the relative importance of crop size of the two tree species on breeding population size and migration of the two crossbill species. Here, we analyse time series (up to 36 years) of crossbills and crop size of spruce and pine in Norway and Sweden to investigate this. We found that breeding population sizes of both species were positively related to spruce crop size. Surprisingly, pine crop size had no positive influence, not even on the Parrot Crossbill. Emigration of both crossbill species (based on autumn migration counts in southern Sweden) increased when there were small seed crops of spruce, but pine crop size had no influence, not even on the Parrot Crossbill. There was no influence of population size on emigration. These results suggest that alternative food resources had an asymmetric effect, only influencing the Parrot Crossbill. This asymmetry explains why the two crossbill species often have synchronous eruptions despite being specialized on different tree species with different seed crop size dynamics.

Male mating season range expansion results from an increase in scale of daily movements for a polygynous-promiscuous bird.

Males of species with promiscuous mating systems are commonly observed to use larger ranges during the mating season relative to non-mating seasons, which is often attributed to a change in movements related to reproductive activities. However, few studies link seasonal range sizes to variation in daily space use patterns to provide insight into the behavioral mechanisms underlying mating season range expansion. We studied 20 GPS-tagged male wild turkeys (Meleagris gallopavo), a large upland gamebird, during the mating and summer non-mating seasons to test the hypothesis that larger mating season ranges resulted from male wild turkeys expanding the scale of daily movement activities to locate and court females. We delineated mating and non-mating seasons based on intensity of gobbling, a vocalization tied to courtship behavior, recorded by autonomous recording units distributed across the study area. Mating season ranges were significantly larger than non-mating season ranges. Daily ranges were larger in the mating season, as were distances between roost sites used on consecutive nights. Variance in daily range size was greater in the mating season, but low temporal autocorrelation suggested considerable daily variability in both seasons. We found no evidence that male wild turkeys changed how they distributed daily movements within seasonal ranges, or differences in habitat use, suggesting larger mating season ranges result from male wild turkeys increasing the scale of their daily movements, rather than a systematic shift to a nomadic movement strategy. Likely, the distribution of females is more dynamic and ephemeral compared to other resources, prompting males to traverse larger daily ranges during the mating season to locate and court females. Our work illustrates the utility of using daily movement to understand the behavioral process underlying larger space use patterns.

A microregional reindeer herding landscape in Yamal: patterns and dynamics of movements

Human and animal mobility lies at the core of any nomadic pastoralist system. Anthropological studies of migratory patterns of mobile pastoralists’ movements have revealed two universal sets of factors—ecological and non-ecological—that influence such movements differently. Our study focuses on the nomadic movement of the Yamal Nenets reindeer herders in the Russian Arctic using a microregional approach to study the indigenous communities on a large scale. The Nenets households of the Mordyyakha microregion in the northwest of the Yamal Peninsula have changed winter pasture sites several times over the past 15–20 years, while maintaining a stable summer route. Based on fieldwork among these people, we analyse how environmental and non-environmental factors influence the dynamics of their summer and winter meridional nomadic routes. We argue that long-term changes in their winter mobility are mainly related to the quality of pastures. Changing winter sites is a strategy that relates to ecological factors and still remains relevant for the households migrating via the meridional pastoral corridors of Yamal. In contrast, changing summer areas, as a rule, occurs in response to developing industry and, thus, relates to non-ecological factors.

Nomadic ungulate movements under threat: Declining mobility of Mongolian gazelles in the Eastern Steppe of Mongolia

Increasing habitat fragmentation and disturbance threaten long-distance movements of ungulates. While the effects of impermeable barriers on ungulate migrations have been well researched, quantitative evidence for gradual, long-term changes of mobility remains rare.We investigated changes in movement behavior of Mongolian gazelle Procapra gutturosa using GPS tracking data collected from 62 gazelle individuals between 2007 and 2021. We quantified 16-day displacement distances as a metric for long-distance movements before using linear mixed models, generalized additive models and quantile regressions to assess how anthropogenic and environmental factors affected gazelle movement behavior.Long-distance 16-day movements decreased by 36 %, from 142 km in 2007 to 92 km in 2021. Changes in mobility were affected by increasing vehicle numbers in Mongolia, but could not be explained by concurrent changes in other environmental factors like temperature, precipitation or vegetation greenness. Gazelle movement decreased close to roads, and gazelles stayed further away from roads during the snow-free season, when traffic likely is most intense.Conserving landscape permeability is essential for maintaining populations of highly mobile species. Our study provides evidence for a gradual decline in gazelle mobility over fifteen years as a response to increasing anthropogenic impact. The transportation infrastructure permeating the Eastern Steppe does not pose physical barriers, yet our findings suggest that increasing traffic volume may create semipermeable barriers to gazelle movement. As human activity is increasing, interactions between ungulates and vehicle traffic need to be closely monitored to identify and mitigate semipermeable barrier effects before landscape permeability is severely altered.

Sero-Epidemiology and Associated Risk Factors of Foot-and-Mouth Disease (FMD) in the Northern Border Regions of Pakistan.

The present cross-sectional survey was carried out to investigate the distribution and risk factors of FMD in Pakistan's northern border regions. About 385 serum samples were compiled from small ruminants (239) and large ruminants (146) and tested using 3ABC-Mab-bELISA. An overall apparent seroprevalence of 67.0% was documented. The highest seroprevalence of 81.1% was reported in the Swat, followed by 76.6% in Mohmand, 72.7% in Gilgit, 65.6% in Shangla, 63.4% in Bajaur, 46.6% in Chitral and lowest 46.5% in Khyber region. Statistically significant variations in seroprevalence of 51.5%, 71.8%, 58.3%, and 74.4% were recorded in sheep, goats, cattle, and buffaloes, respectively. From the different risk factors investigated, age, sex, species of animal, seasons, flock/herd size, farming methods, outbreak location, and nomadic animal movement were found to be significantly associated (p < 0.05) with the seroprevalence of FMD. It was concluded that proper epidemiological study, risk-based FMD surveillance in small ruminants, vaccination strategy, control measures for transboundary animal movement, collaborations, and awareness programs need to be practiced in the study regions to investigate the newly circulating virus strains in large and small ruminants and associated factors for the wide seroprevalence to plan proper control policies to bound the consequence of FMD in the region.

Movement patterns of juvenile and immature eastern imperial eagles from Bulgaria

Eastern Imperial Eagle (Aquila heliaca) populations in Central Europe and Balkans are non-migratory while most of those in the eastern part of the range are migratory. However, the juveniles from the non-migratory populations disperse over a large area. We studied the movement pattern of juvenile and immature Eastern Imperial Eagle from Southeast of Bulgaria using satellite telemetry. In total, 23 juvenile Eastern Imperial Eagles have been fitted with Argos/GPS transmitters in their nests in Bulgaria in 2008–2013 and seven eagles were tagged with GPS/GSM transmitters in 2021–2022. Dispersal distance varies significantly as some birds reached Israel, Syria, Saudi Arabia, and Africa while others wintered on the Balkan Peninsula and in Turkey. Majority of the birds spent their first winter outside Europe in Anatolia, Middle East, and Africa while three birds wintered in the Southeastern Balkans and one in the island of Crete. In the spring all eagles moved from the wintering areas to Bulgaria, close to their natal areas. Long distance nomadic movements northward during the spring and summer to Central Europe, Ukraine, Belarus and northernmost to Latvia and Russia have been recorded as well. The results indicate that international collaboration should be part of the conservation strategies for the Bulgarian Eastern Imperial Eagle population with Turkey as a key country for conservation interventions.

Body mass and triglycerides predict departure of free‐living nomadic pine siskins

Abstract Facultative migrations are observed across vertebrate taxa, include irruptive and nomadic movements, and occur in response to ephemeral and unpredictably variable resources. While the physiology underlying seasonal, obligate migrations is thoroughly studied, much less is known about the physiological mechanisms of facultative movements. We test two hypotheses in a free‐living, nomadic bird, the pine siskin (Spinus pinus). The Prepare Hypothesis predicts that, like obligate migrants, siskins increase fuel stores to prepare for migratory movements and elevations of baseline corticosterone (CORT) support departure. The Escape Hypothesis predicts that siskins do not prepare for departure, body condition declines as food availability declines, and stress‐related levels of CORT induce escape from resource‐poor areas. Under the controlled lab conditions of previous studies, food restriction induces declines in body condition and increases in CORT and locomotor activity, supporting the Escape Hypothesis. This study evaluates the ecological relevance of these captive findings by testing the Prepare and Escape Hypotheses in the field for the first time. During two fall field seasons, we radio‐tagged siskins and tracked their local movements using handheld and automated telemetry. We assess how body condition and CORT relate to feeding behaviour [estimated via plasma triglycerides (TRIG)], space use and departure. We do not find support for either the Prepare or Escape Hypothesis, but rather observe an intermediate pattern. Birds with higher TRIG, and therefore greater food intake, are more likely to depart. Birds in poor condition stay longer near the field site; however, above a threshold body mass, body condition does not predict departure. These findings suggest moderate energy stores are necessary for departure, but movement decisions depend on other factors among birds with sufficient fuel. Siskin movements are physiologically distinct from both obligate and fugitive movements, and we discuss how food availability and body condition interact to drive different types of movement. Read the free Plain Language Summary for this article on the Journal blog.

Ландшафты Средневековья: Фернан Бродель о проблеме кочевничества в средневековом мире Средиземноморья

The scientific heritage of Fernand Braudel, the outstanding French scientist and the recognized leader of the second generation of the historical school “Annales”, continues to be of great historiographical interest. However, not all aspects of his research have been adequately evaluated. The authors of this study examine the conceptual approaches of F. Braudel to the history of interaction between man and nature in the Mediterranean and adjacent regions through the problem of nomadism. The method of considering this issue corresponds to the basic principles of historiographic research: Identifying the author’s substantive position by analyzing his works, characterizing the source base and methods of criticizing the sources used. Braudel’s nomadism is not only a phenomenon of the steppes of Central Asia, the pastures of the Iranian Highlands, the sands of the Sahara, but an organic part of the life of the developing societies of the Iberian Peninsula, Provence, Apennines, Balkans, Asia Minor. F. Braudel was faced with the task of covering in its entirety the numerous problems associated with driving livestock to grazing and with the nomadic way of life, that is, with the regular movement of human masses and herds of livestock. Braudel revives the model of the nomadic life of the Balkans, Anatolia and North Africa. Here, in his opinion, different types of society, different types of economic management, different civilizations and ways of life collide. Braudel agrees with the identification of several types of seasonal movement of livestock. According to F. Braudel, seasonal movements of livestock are associated with a variety of factors: physical, social, historical. Nomadism, Braudel believes, has a more ancient origin than distant-pasture animal husbandry. Nomadic herders were gradually and consistently driven out of the inner plains and lowlands and were driven back to the mountainous outskirts and peripheral plains. An overabundance of empty spaces dooms, from the perspective of F. Braudel, society and economy to perpetual motion. He considered the pendulum movement of the steppe nomads to the sea, and then back from the sea to the desert to be one of the essential factors in the history of the Mediterranean. Nomadism, with its harsh closed “culture” speaks, according to F. Braudel, of obvious determinism.

‘Languages are so like their boots’: Linguistic Incompossibility in Flush

Reading the 1933 biography Flush alongside Woolf’s translation theory and Braidotti’s nomadic ‘multilinguism’, this paper argues that Woolf’s modernist dislocation of English both informs and is informed by her relationship with non-English languages. Using the Deleuzean idea of the ‘incompossible’ as a way of considering a world made up of multiple co-existing yet contradictory relations, I trace the presence of a ‘linguistic incompossibility’ throughout Woolf’s oeuvre. As a writer, publisher and translator, Woolf articulates a mode of being in and relating to the world that is positively constituted through the multilingual, and which in turn often constitutes the monolingual as static, ineffective, and even impossible. From the contradictory etymologies of ‘Spaniel’ offered in Flush, to the process-orientated relationship with languages in Woolf's non-fiction writing, the old idea of a closed, objective and monolithic language is inadequate for communicating the nomadic movements of modernist subjectivity. Linguistic incompossibility becomes a way of figuring the affirmatory possibilities of difference across, between and within languages to reveal the fluidity and multiplicity of language itself.

Short-Eared Owl Land-Use Associations during the Breeding Season in the Western United States

ABSTRACT The Short-eared Owl (Asio flammeus) is a species of conservation concern in the western USA, with evidence for declining population sizes. Monitoring of Short-eared Owls is complicated because of their low site fidelity and nomadic movements. We recruited community-science participants to implement a multi-year survey of Short-eared Owls across eight states in the western USA, resulting in a program of sufficient temporal and spatial dimensions to overcome many of the challenges in monitoring this species. We implemented both multi-scale occupancy and colonization/extinction modeling to provide insights into land-cover use, and to identify which cover types supported higher occurrence. Short-eared Owls were associated with native and anthropogenic land-cover types, but site occupancy varied among these categories and at different scales. Native grasslands, marsh/riparian, hay/fallow agriculture, and cultivated croplands were occupied most consistently across years. Occupancy rates differed at different scales (e.g., marsh/riparian was the only land-cover type positively associated with occupancy at both transect and point scales). Contrary to expectations, native shrubland was negatively associated with occupancy at the point scale, and exhibited low colonization and high extinction rates. Our results suggest that conserving native landscapes in general, and grasslands, marsh, and riparian areas specifically, would benefit Short-eared Owls. Furthermore, Short-eared Owl occupancy was positively associated with hay/fallow land-cover types, suggesting that some nonnative land-cover types can function as Short-eared Owl habitat. Lastly, our results highlight how developing a broad-scale community science survey can inform conservation for a species not well monitored by existing survey programs.

Checklist of the birds of Mato Grosso do Sul state, Brazil: diversity and conservation

Several phytogeographic regions (Cerrado, Pantanal, Atlantic Forest, Gran Chaco, and Chiquitano Dry Forests) converge in the state of Mato Grosso do Sul, Brazil, and influence regional biodiversity. Despite a list of birds in the state of Mato Grosso do Sul being published by Nunes et al. (2017), it is necessary to update and critically review avifauna records. In this study, we gathered the results of several records obtained from species lists and online data platforms of the 336 sites in this state over the last decades and grouped them into Main (Primary and Secondary) and Tertiary Lists. The avifauna of Mato Grosso do Sul is composed of 678 species, of which 643 (95%) have records proving their occurrence (Primary List), whereas 34 still lack documentation (Secondary List). The number of related species for Mato Grosso do Sul represents 34% of the Brazilian avifauna. Some species stand out for their unique occurrence in Mato Grosso do Sul, such as Melanerpes cactorum, Celeus lugubris, Phaethornis subochraceus, and Cantorchilus guarayanus, reflecting the influence of different phytogeographic regions of the Chaco and Chiquitano Dry Forests. Migrants represent 20% of the bird community occurring in the state, of which 93 species correspond to migrants from various regions of South America (south and west) and 40 to boreal migrants. Thirty-three species perform nomadic movements across the Pantanal Plain and other regions of the state. Thirty-one species are included in some conservation-threatened categories of global and/or national endangered species lists. Other 30 species are included in the near-threatened category at the global level and 23 at the national level. In addition, species typical of dry forests (in Serra da Bodoquena and Maciço do Urucum) and those from the Atlantic Forest in the south of the state deserve attention due to their restricted distribution and the high anthropogenic pressure on their habitat.

A gazelle's extraordinary, 18,000-km-long journey through the steppes of Mongolia.

A gazelle's extraordinary, 18,000-km-long journey through the steppes of Mongolia.

Seasonal movements in caribou ecotypes of Western Canada

BackgroundSeveral migratory ungulates, including caribou, are dramatically declining. Caribou of the Barren-ground ecotype, which forms its own subspecies, are known to be mainly migratory. By contrast, within the Woodland subspecies, animals of the Boreal ecotype are known to be mainly sedentary, while those within the Northern and Central Mountain ecotypes to be partially migratory, with only some individuals migrating. Promotion of conservation actions (e.g., habitat protection) that are specific to both residents and migrants, as well as to the areas they frequent seasonally (which may be separate for migrants), requires distinguishing migration from other movement behaviours, which might be a challenge.MethodsWe aimed at assessing seasonal movement behaviours, including migratory, resident, dispersing, and nomadic, for caribou belonging to the Barren-ground and Woodland subspecies and ecotypes. We examined seasonal displacement, both planar and altitudinal, and seasonal ranges overlap for 366 individuals that were GPS-collared in Northern and Western Canada. Lastly, we assessed the ability of caribou individuals to switch between migratory and non-migratory movement behaviours between years.ResultsWe detected migratory behaviour within each of the studied subspecies and ecotypes. However, seasonal ranges overlap (an index of sedentary behaviour) varied, with proportions of clear migrants (0 overlap) of 40.94% for Barren-ground caribou and 23.34% for Woodland caribou, and of 32.95%, 54.87%, and 8.86% for its Northern Mountain, Central Mountain, and Boreal ecotype, respectively. Plastic switches of individuals were also detected between migratory, resident, dispersing, and nomadic seasonal movements performed across years.ConclusionsOur unexpected findings of marked seasonal movement plasticity in caribou indicate that this phenomenon should be better studied to understand the resilience of this endangered species to habitat and climatic changes. Our results that a substantial proportion of individuals engaged in seasonal migration in all studied ecotypes indicate that caribou conservation plans should account for critical habitat in both summer and winter ranges. Accordingly, conservation strategies are being devised for the Woodland subspecies and its ecotypes, which were found to be at least partially migratory in this study. Our findings that migration is detectable with both planar and altitudinal analyses of seasonal displacement provide a tool to better define seasonal ranges, also in mountainous and hilly environments, and protect habitat there.

Kazakh Variations for Herders and Animals in the Mongolian Altai: Methodological Contributions to the Study of Nomadic Pastoralism

Abstract Kazakh herders of the Mongolian Altai practice a form of nomadism characterised by high altitudinal amplitude and more frequent movements than in other regions of Mongolia. This paper proposes a local scale study of nomadic practices using an original multidisciplinary methodological approach combining anthropological surveys and several years' GPS data tracking of five herder families' herds. The dialogue between geo-localised and qualitative data over several consecutive years makes it possible to better understand the environmental, economic, social and individual factors that determine nomadic routes and calendars. It also highlights the ways in which herders cope with interannual variations. In particular, this new methodology reveals the importance of temporary herd separations and re-evaluates the frequency of nomadic movements, which might have been underestimated by the classical anthropological approach.

Where Butterflies Fill the Sky: A Story of Immigration, Family, and Finding Home by Zahra Marwan

Reviewed by: Where Butterflies Fill the Sky: A Story of Immigration, Family, and Finding Home by Zahra Marwan Betty Bush Where Butterflies Fill the Sky: A Story of Immigration, Family, and Finding Home Written and illustrated by Zahra Marwan Home is shaped as much by region and culture as it is small, unique details, and it’s those specific, special elements that make a place feel truly our own. Drawing from her experiences in Kuwait and then New Mexico, Marwan offers a soothing tribute to homes old and new, as well as encouragment to child readers displaced from familiar turf and trying to gain a foothold on new ground. The interplay of simple, literal prose and complex, figurative illustration here lifts this sensitive and useful picture book on immigration into an inviting exploration of how experiences are transformed by time and memory. Young Zahra knows she lives in the perfect place, where the sky hosts butterflies and where “my ancestors live and are always watching.” She really cannot comprehend why her father insists they must leave, telling her only that they are not welcome anymore: “I say my goodbyes without knowing why.” While the new place across the ocean has no seashore, its air carries music and joy, the people look beyond her language struggles and make her feel at home, and long distance phone calls keeps her in touch with her beloved aunties: “In this new place of high desert, I have found a home.” Viewers will readily see why Zahra’s homeland is hard to leave. The golden warmth of the earthen buildings harmonizes with the rich turquoise of the sea, dotted with boats and under a sky filled with colorful butterflies. Friends and family gather on rooftops, and if the aunties look a bit intimidating in their black garb, there are clear signs of familial belonging in their close, protective body language and their streaming dark hair that matches Zahra’s own. Fortunately, her new home is equally beautiful, with lush green along a river and buildings made of new shapes but familiar earthen walls. There’s music and dancing and the possibility of a new friend as bright hot air balloons cheerfully float above. The concreteness of these there-and-here images notwithstanding, Marwan nudges viewers slightly off-balance. Exactly where are these places? Why do proportions shift? What are those white bulls that trail Zahra from old home to new? Essential back matter answers these questions, suppling not only the specifics of Marwan’s personal immigration experience, but also keys and clues to interpreting her evocative paintings. Marwan explains in accessible terms how nomadic movements, illiteracy, and lack of contact with formal government structures in 1989 led families like hers, with a Kuwaiti mother and a stateless father, to end up unregistered and pressured to emigrate. Absent observable catastophes such as [End Page 211] war or famine or natural disaster, it’s understandable a little girl would be baffled by political disturbance to her own happy life. Now, under adult reflection, she remembers the experience as “…dreamlike. A collage of different people, places, and things that all appear at once.” With a few contextual clues, the imagery isn’t difficult to parse: the smoking box carried by a looming auntie is myrrh incense for protection; the family’s airborne drift away from Kuwait and tumble into New Mexico, literally portrayed, is quite probably an airplane flight; the balloon-embellished sailboat far out to sea is a tribute to friends whose immigration stories did not share the happy ending of her own. Perhaps the most important recurring image is a playful one: the white bulls Marwan envisions as ancestors. Fore- or backgrounded, they watch her while she sleeps, carry packing boxes before her departure, and nap contentedly as she acclimates, which invites younger viewers to play seek and find, and older readers to appreciate that home never leaves you. Readers who use the contextual and symbolic keys can unlock discussion of what makes memory potent, what they might miss from a home left behind, and what they might value most in a new one—topics that can bridge age and experience within families on the move...