Migration of Bristle-Thighed Curlews on Laysan Island: Timing, Behavior and Estimated Flight Range

Marks, Jeffrey S.; Redmond, Roland L.

doi:10.2307/1369317

Cited by 26 publications

(24 citation statements)

References 36 publications

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“…Geese and cranes even migrate in family groups, which could theoretically benefit juvenile storks as well, though presumably at the expense of fitness costs for the parents due to the extended nurturing period. Nevertheless, in many species, juveniles may carry out their first migration without adults (Marks & Redmond ; Newton ), and in such cases, they apparently benefit from longer stopovers (Hake, Kjellen & Alerstam ; Mellone et al . ).…”

Section: Discussionmentioning

confidence: 99%

The challenges of the first migration: movement and behaviour of juvenile vs. adult white storks with insights regarding juvenile mortality

Rotics

Kaatz²,

Resheff

et al. 2016

Journal of Animal Ecology

165

209

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Summary 1.Migration conveys an immense challenge, especially for juvenile birds coping with enduring and risky journeys shortly after fledging. Accordingly, juveniles exhibit considerably lower survival rates compared to adults, particularly during migration. Juvenile white storks (Ciconia ciconia), which are known to rely on adults during their first fall migration presumably for navigational purposes, also display much lower annual survival than adults. 2. Using detailed GPS and body acceleration data, we examined the patterns and potential causes of age-related differences in fall migration properties of white storks by comparing first-year juveniles and adults. We compared juvenile and adult parameters of movement, behaviour and energy expenditure (estimated from overall dynamic body acceleration) and placed this in the context of the juveniles' lower survival rate. 3. Juveniles used flapping flight vs. soaring flight 23% more than adults and were estimated to expend 14% more energy during flight. Juveniles did not compensate for their higher flight costs by increased refuelling or resting during migration. When juveniles and adults migrated together in the same flock, the juvenile flew mostly behind the adult and was left behind when they separated. Juveniles showed greater improvement in flight efficiency throughout migration compared to adults which appears crucial because juveniles exhibiting higher flight costs suffered increased mortality. 4. Our findings demonstrate the conflict between the juveniles' inferior flight skills and their urge to keep up with mixed adult-juvenile flocks. We suggest that increased flight costs are an important proximate cause of juvenile mortality in white storks and likely in other soaring migrants and that natural selection is operating on juvenile variation in flight efficiency.

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Section: Discussionmentioning

confidence: 99%

The challenges of the first migration: movement and behaviour of juvenile vs. adult white storks with insights regarding juvenile mortality

Rotics

Kaatz²,

Resheff

et al. 2016

Journal of Animal Ecology

165

209

View full text Add to dashboard Cite

show abstract

“…Information covers direct and indirect cues, memory of previous experiences, and even genetically coded ''memory.'' Juvenile bristlethighed curlews, for example, navigate a nonstop 4,000-km route from Alaska to the small island of Laysan in the Pacific with no prior experience or guidance by adults (30). Equivalently, the seed abscission traits of plants synchronize seed release with conditions favorable for long-distance dispersal (21).…”

Section: Figmentioning

confidence: 99%

A movement ecology paradigm for unifying organismal movement research

Nathan

Getz

Revilla

et al. 2008

Proc. Natl. Acad. Sci. U.S.A.

2,301

2,423

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Movement of individual organisms is fundamental to life, quilting our planet in a rich tapestry of phenomena with diverse implications for ecosystems and humans. Movement research is both plentiful and insightful, and recent methodological advances facilitate obtaining a detailed view of individual movement. Yet, we lack a general unifying paradigm, derived from first principles, which can place movement studies within a common context and advance the development of a mature scientific discipline. This introductory article to the Movement Ecology Special Feature proposes a paradigm that integrates conceptual, theoretical, methodological, and empirical frameworks for studying movement of all organisms, from microbes to trees to elephants. We introduce a conceptual framework depicting the interplay among four basic mechanistic components of organismal movement: the internal state (why move?), motion (how to move?), and navigation (when and where to move?) capacities of the individual and the external factors affecting movement. We demonstrate how the proposed framework aids the study of various taxa and movement types; promotes the formulation of hypotheses about movement; and complements existing biomechanical, cognitive, random, and optimality paradigms of movement. The proposed framework integrates eclectic research on movement into a structured paradigm and aims at providing a basis for hypothesis generation and a vehicle facilitating the understanding of the causes, mechanisms, and spatiotemporal patterns of movement and their role in various ecological and evolutionary processes.''Now we must consider in general the common reason for moving with any movement whatever.'' (Aristotle, De Motu Animalium, 4th century B.C.) motion capacity ͉ navigation capacity ͉ migration ͉ dispersal ͉ foraging

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“…Well-cited examples include the long treks undertaken yearly by passerine birds, shorebirds, sea turtles, and whales. From breeding to wintering grounds, distances of 4000 to 5400 km (and maybe as far as 8000 km) are covered nonstop over 3 to 4 days by the great knot (Calidris tenuirostris), bar-tailed godwit (Limosa lapponica), bristle-thighed curlew (Numenius tahitiensis), and the Pacific golden plover (Pluvialis fulva) (29,31,295,349). Female green sea turtles (Chelonia mydas) swim 2200 km from foraging grounds off the coast of Brazil to the Ascension Island to nest and then subsequently return, possibly without feeding during each leg of the trip or during nesting (251).…”

Section: Migrationmentioning

confidence: 99%

Integrative Physiology of Fasting

Secor

Carey

2016

Comprehensive Physiology

149

144

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Extended bouts of fasting are ingrained in the ecology of many organisms, characterizing aspects of reproduction, development, hibernation, estivation, migration, and infrequent feeding habits. The challenge of long fasting episodes is the need to maintain physiological homeostasis while relying solely on endogenous resources. To meet that challenge, animals utilize an integrated repertoire of behavioral, physiological, and biochemical responses that reduce metabolic rates, maintain tissue structure and function, and thus enhance survival. We have synthesized in this review the integrative physiological, morphological, and biochemical responses, and their stages, that characterize natural fasting bouts. Underlying the capacity to survive extended fasts are behaviors and mechanisms that reduce metabolic expenditure and shift the dependency to lipid utilization. Hormonal regulation and immune capacity are altered by fasting; hormones that trigger digestion, elevate metabolism, and support immune performance become depressed, whereas hormones that enhance the utilization of endogenous substrates are elevated. The negative energy budget that accompanies fasting leads to the loss of body mass as fat stores are depleted and tissues undergo atrophy (i.e., loss of mass). Absolute rates of body mass loss scale allometrically among vertebrates. Tissues and organs vary in the degree of atrophy and downregulation of function, depending on the degree to which they are used during the fast. Fasting affects the population dynamics and activities of the gut microbiota, an interplay that impacts the host's fasting biology. Fasting-induced gene expression programs underlie the broad spectrum of integrated physiological mechanisms responsible for an animal's ability to survive long episodes of natural fasting.

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Migration of Bristle-Thighed Curlews on Laysan Island: Timing, Behavior and Estimated Flight Range

Cited by 26 publications

References 36 publications

The challenges of the first migration: movement and behaviour of juvenile vs. adult white storks with insights regarding juvenile mortality

The challenges of the first migration: movement and behaviour of juvenile vs. adult white storks with insights regarding juvenile mortality

A movement ecology paradigm for unifying organismal movement research

Integrative Physiology of Fasting

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