Understanding the ecological and evolutionary function of stopover in migrating birds

Biological reviews/Biological reviews of the Cambridge Philosophical Society, Journal Year: 2022, Volume and Issue: 97(4), P. 1231 - 1252

Published: Feb. 8, 2022

ABSTRACT Global movement patterns of migratory birds illustrate their fascinating physical and physiological abilities to cross continents oceans. During voyages, most land multiple times make so‐called ‘stopovers’. Our current knowledge on the functions stopover is mainly based proximate study departure decisions. However, such studies are insufficient gauge fully ecological evolutionary stopover. If we how a focal trait, e.g. changes in energy stores, affects decision depart from without considering trait(s) that actually caused bird land, unfavourable environmental conditions for flight, misinterpret function It thus important realise acknowledge stopovers have many different functions, not every migrant has same (set of) reasons stop‐over. Additionally, may obtain contradictory results because significance traits context dependent. For instance, late spring migrants be more prone risk‐taking with lower stores than early migrants. Thus, neglect decisions subject selection minimise immediate (mortality risk) and/or delayed (low future reproductive output) fitness costs. To alleviate these issues, first define as an interruption endurance flight costs . Second, review all probable stopover, which include accumulating energy, various forms recovery avoiding adverse list potential other less well studied, minimising predation, exhaustion spatiotemporal adjustments migration. Third, derived aspects, argue paradigm shift ecology research. This includes focusing why individual interrupts its likely identify individual‐specific function(s) correctly departure‐decision studies. Moreover, highlight selective forces acting dependent expected differ between, K −/ r ‐selected species, sexes migration strategies. example, else being equal, species survival rate, high rate) should stronger urge continue or resume increase suffered offset by higher success subsequent breeding season. Finally, propose focus mechanisms controlling landing decisions, ultimate shaping ideas limited but can applied any species. revised definition proposed stimulate fruitful discussion towards better understanding Furthermore, identifying will support targeted measures conserve restore functionality sites threatened anthropogenic changes. especially long‐distance migrants, currently alarming decline.

Language: Английский

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How Bar-Headed Geese Fly Over the Himalayas

Physiology, Journal Year: 2015, Volume and Issue: 30(2), P. 107 - 115

Published: March 1, 2015

Bar-headed geese cross the Himalayas on one of most iconic high-altitude migrations in world. Heart rates and metabolic costs flight increase with elevation can be near maximal during steep climbs. Their ability to sustain high oxygen demands air that is exceedingly oxygen-thin depends unique cardiorespiratory physiology birds general along several evolved specializations across O 2 transport cascade.

Language: Английский

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How do energy stores and changes in these affect departure decisions by migratory birds? A critical view on stopover ecology studies and some future perspectives

Journal of Comparative Physiology A, Journal Year: 2017, Volume and Issue: 203(6-7), P. 411 - 429

Published: March 22, 2017

Language: Английский

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Red blood cells open promising avenues for longitudinal studies of ageing in laboratory, non-model and wild animals

Experimental Gerontology, Journal Year: 2015, Volume and Issue: 71, P. 118 - 134

Published: Sept. 8, 2015

Language: Английский

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Migrating songbirds on stopover prepare for, and recover from, oxidative challenges posed by long‐distance flight

Ecology and Evolution, Journal Year: 2015, Volume and Issue: 5(15), P. 3198 - 3209

Published: July 14, 2015

Managing oxidative stress is an important physiological function for all aerobic organisms, particularly during periods of prolonged high metabolic activity, such as long-distance migration across ecological barriers. However, no previous study has investigated the status birds at different stages and whether that depends on condition birds. In this study, we compared (1) energy stores circulating measures in (a) two species Neotropical migrants with differing strategies were sampled autumn stopover site before barrier; (b) a trans-Saharan migrant spring after crossing (2) indicators fat metabolism stopovers varying duration (0-8 nights), based recapture records. We found to be positively correlated antioxidant capacity Blackpoll Warblers Red-eyed Vireos preparing fall Block Island, USA, but uncorrelated Garden island Ponza, Italy, Sahara Desert Mediterranean Sea. circumstances, lipid oxidation levels. Among anabolism increased while damage levels decreased. Our provides evidence build they sites long flights, does not support idea remain elevated fuel barrier. results further suggest may inescapable hazard using fats primary flight. Yet, also show are capable recovering from have accrued migration, decrease time stopover. Thus, strategy migrating songbirds prophylactic concert flight, then repair refueling

Language: Английский

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Oxidative balance in birds: an atoms‐to‐organisms‐to‐ecology primer for ornithologists

Journal of Field Ornithology, Journal Year: 2016, Volume and Issue: 87(1), P. 1 - 20

Published: Jan. 19, 2016

All air-breathing organisms must face the challenge of oxidative damage, and understanding how animals cope can lend insight into their ecology. Unlike other vertebrates, birds rely primarily on fats to fuel endurance exercise such as migration, therefore a greater potential for damage from reactive by-products own metabolism. We review physiological ecology migrating through lens oxidation–reduction chemistry, underscoring balance in wild may affect dietary choices use critical stopover habitats during migration. Recent studies reveal that migratory prepare challenges either by up-regulating endogenous antioxidants or consuming them diet, they repair after long flights, although much remains be discovered about maintain over course conclude describing some most used useful measures antioxidant status field ornithologists include tool kit techniques probe birds. Balance oxidativo en aves: introducción para ornitólogos desde los átomos hocia organismos y la ecología Todos que respiran aire deben enfrentarse al reto del daño por oxidación. Entender como animales pueden manejar este puede dar indicios sobre su ecología. Contrario otros vertebrados, las aves se basan primordialmente grasas combustible ejercicios requieren una resistencia alta, migración. Por lo tanto, enfrentan un mayor potencial parte de subproductos reactivos propio metabolismo. Aquí revisamos fisiológica migratorias través lupa química oxido-reducción, resaltando el silvestres afectar sus preferencias dieta uso hábitats críticos escala durante Estudios recientes revelan preparan retos oxidativos mediante incremento antioxidantes endógenos, o consumo reparan daños después vuelos largos. Sin embargo, aun queda mucho descubrir mantienen largo transcurso Concluimos describiendo algunos medidas útiles mas utilizadas estatus antioxidante campo incluir dentro técnicas exploración silvestres.

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Environmental, ecological and mechanistic drivers of avian seasonal metabolic flexibility in response to cold winters

Journal of Ornithology, Journal Year: 2015, Volume and Issue: 156(S1), P. 377 - 388

Published: March 12, 2015

Language: Английский

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The role of the antioxidant system during intense endurance exercise: lessons from migrating birds

Journal of Experimental Biology, Journal Year: 2016, Volume and Issue: 219(23), P. 3684 - 3695

Published: Nov. 30, 2016

ABSTRACT During migration, birds substantially increase their metabolic rate and burn fats as fuel yet somehow avoid succumbing to overwhelming oxidative damage. The physiological means by which vertebrates such migrating can counteract an increased production of reactive species (RS) are rather limited: they upregulate endogenous antioxidant system and/or consume dietary antioxidants (prophylactically or therapeutically). Thus, alter different components respond the demands long-duration flights, but much remains be discovered about complexities RS protection throughout migration. Here, we use bird migration example discuss how produced during endurance exercise complex protect against cellular damage caused RS. Understanding a bird's responds lend insights into other life-history stages when may high, from exercise.

Language: Английский

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Bird migration within the Neotropics

Ornithology, Journal Year: 2020, Volume and Issue: 137(4)

Published: July 31, 2020

Abstract Although the migration ecology of birds breeding in Neotropics is still poorly studied relative to that their counterparts at north-temperate latitudes, studies conducted over last 2 decades have revealed much more common and diverse than previously thought. These identified dozens species migrate latitudinally within South America, altitudinally various mountain ranges, between Caribbean islands, longitudinally across ecosystems such as Amazon rainforest. Advances miniaturized tracking technologies, enormous citizen science databases, powerful analytical approaches provide an unprecedented ability detect evaluate temporally spatially fine-scale patterns, greatly facilitating study migratory patterns tropical regions. We argue a renewed effort research on short- long-distance bird will allow (1) comparative identify emergent properties behavior, (2) identification convergent or unique mechanistic drivers ecological settings, (3) formulation effective conservation management plans for Neotropical birds, (4) predictions about how respond large-scale climatic changes Neotropics. Here, we review current state knowledge migration, with focus America. specifically examine similarities differences observed breed Nearctic compared highlight key future questions.

Language: Английский

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Oxidative status and metabolic profile in a long-lived bird preparing for extreme endurance migration

Scientific Reports, Journal Year: 2019, Volume and Issue: 9(1)

Published: Nov. 26, 2019

The high metabolic activity associated with endurance flights and intense fuelling of migrant birds may produce large quantities reactive oxygen species, which cause oxidative damage. Yet it remains unknown how long-lived prepare for challenges prior to extreme flights. We combined blood measurements status enzyme fat metabolism in Hudsonian godwits (Limosa haemastica, a shorebird) before they embarked on non-stop longer than 10,000 km during their northbound migrations. found that increased total antioxidant capacity (TAC) reduced damage (TBARS) as the pre-migratory season progressed, despite higher basal rates departure. Elevations plasma β-hydroxybutyrate uric acid suggest lipid protein breakdown supports energetic requirements migration. Significant associations between mitochondrial cytochrome-c oxidase TAC (negative) TBARS (positive) winter indicate greater can result responses. However remained unchanged premigratory stages, so be unable adjust anticipation future demands. These results enhance migratory preparation, might represent an adaptation diminish physiological costs long-distance

Language: Английский

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