High individual repeatability of the migratory behaviour of a long-distance migratory seabird

Movement Ecology, Journal Year: 2022, Volume and Issue: 10(1)

Published: Feb. 5, 2022

Abstract Background Understanding the evolution of migration requires knowledge patterns, sources, and consequences variation in migratory behaviour, a need exacerbated by fact that many species show rapid population declines require knowledge-based conservation measures. We therefore detailed on spatial temporal distribution individuals across their annual cycle, quantify how components behaviour vary within among individuals. Methods tracked 138 journeys undertaken 64 adult common terns ( Sterna hirundo ) from breeding colony northwest Germany to identify spatiotemporal these birds evaluate individual repeatability eleven traits describing behaviour. Results Birds left early September, then moved south along East Atlantic Flyway. Wintering areas were reached mid-September located at west coasts West Africa as well Namibia South Africa. wintering late March mid-April. The timing, total duration distance migration, location areas, moderately highly repeatable (repeatability indexes: 0.36–0.75, 0.65–0.66, 0.93–0.94, 0.98–1.00, respectively), estimates not strongly affected population-level inter-annual Conclusions found large between-individual tern strong several aspects

Language: Английский

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The importance of migratory drop-off for island colonization in birds

Proceedings of the Royal Society B Biological Sciences, Journal Year: 2024, Volume and Issue: 291(2021)

Published: April 17, 2024

Seasonal migration is an underappreciated driver of animal diversification. Changes in migratory behaviour may favour the establishment sedentary founder populations and promote speciation if there sufficient reproductive isolation between populations. From a systematic literature review, we here quantify role drop-off—the loss behaviour—in promoting birds on islands. We identify at least 157 independent colonization events likely initiated by species that led to speciation, including 44 cases among recently extinct species. By comparing, for all islands, proportion island endemic derived from drop-off with potential colonizers, showed seasonal has larger effect richness than direct dispersal. also found increases geographic Furthermore, success depends part biogeographic ecological factors, positively associated greater range size flock sizes. These results highlight importance shifts process calls consideration distribution birds.

Language: Английский

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Introgression and disruption of migration routes have shaped the genetic integrity of wildebeest populations

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: April 12, 2024

Abstract The blue wildebeest ( Connochaetes taurinus ) is a keystone species in savanna ecosystems from southern to eastern Africa, and well known for its spectacular migrations locally extreme abundance. In contrast, the black C. gnou endemic barely escaped extinction 1900s feared be danger of genetic swamping wildebeest. Despite ecological importance wildebeest, there lack understanding how unique migratory ecology has affected gene flow, structure phylogeography. Here, we analyze whole genomes 121 22 across genus’ range. We find discrete consistent with morphologically defined subspecies. Unexpectedly, our analyses reveal no signs recent interspecific admixture, but rather late Pleistocene introgression into populations. Finally, that populations exhibit combination long-range panmixia, higher diversity lower inbreeding levels compared neighboring whose migration recently been disrupted. These findings provide crucial insights evolutionary history tangible evidence negative effects anthropogenic activities on highly ungulates.

Language: Английский

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Phylogenomics, Lineage Diversification Rates, and the Evolution of Diadromy in Clupeiformes (Anchovies, Herrings, Sardines, and Relatives)

Systematic Biology, Journal Year: 2024, Volume and Issue: 73(4), P. 683 - 703

Published: May 17, 2024

Migration independently evolved numerous times in animals, with a myriad of ecological and evolutionary implications. In fishes, perhaps the most extreme form migration is diadromy, between marine freshwater environments. Key long-standing questions are: how many has diadromy frequently do diadromous clades give rise to non-diadromous species, does influence lineage diversification rates? Many fishes have large geographic ranges constituent populations that use isolated habitats. This may limit gene flow some populations, increasing likelihood speciation lineages relative nondiadromous lineages. Alternatively, reduce rates if associated enhanced dispersal capacity facilitates within populations. Clupeiformes (herrings, sardines, shads, anchovies) model clade for testing hypotheses about evolution because it includes an exceptionally high proportion species several independent origins diadromy. However, relationships among major clupeiform remain unresolved, existing phylogenies sparsely sampled limiting resolution phylogenetically informed statistical analyses. We assembled phylogenomic dataset used multi-species coalescent concatenation-based approaches generate comprehensive, highly resolved phylogeny date, clarifying associations identifying recalcitrant needing further examination. determined variation sequence (heterotachy) base-composition (nonstationarity) had little impact on our results. Using this phylogeny, we characterized patterns tested differences diadromous, marine, identified 13 transitions all during Cenozoic Era (10 anadromy, 2 catadromy, 1 origin amphidromy), 7 losses Two rapidly generated demonstrating not dead end. discovered considerably faster transition out than The largest rate increase was but uncovered support categorically versus fishes. propose potential accelerated diversification, particularly migrate long distances. only be realized certain biogeographic contexts, such as when allows access ecosystems which there limited competition from incumbent species.

Language: Английский

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North American avian species that migrate in flocks show greater long-term non-breeding range shift rates

Movement Ecology, Journal Year: 2025, Volume and Issue: 13(1)

Published: Jan. 13, 2025

Abstract Background Many species are exhibiting range shifts associated with anthropogenic change. For migratory species, colonisation of new areas can require novel programmes that facilitate navigation between independently-shifting seasonal ranges. Therefore, in some cases range-shifts may be limited by the capacity for to transferred generations, which genetically and socially mediated. Methods Here we used 50 years North American Breeding Bird Survey Audubon Christmas Count data test prediction breeding and/or non-breeding more prevalent among flocking migrants, possess a rapid social transmission migration routes. Results Across 122 bird was significant positive predictor magnitude centre abundance (COA) shift within our study region (conterminous United States Southern Canada). subset 81 where age-structured determined, migrating mixed-age flocks produced greatest solo migrants lowest. Flocking not COA shifts, were better explained absolute population trends distance. Conclusions Our results suggest grouping play an important role facilitating distributional responses climate change species. We highlight need gain understanding programme inheritance, how this influences spatiotemporal dynamics under environmental

Language: Английский

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Migratory microbiomes: the role of the gut microbiome in bird migration eco‐physiology

Journal of Avian Biology, Journal Year: 2025, Volume and Issue: 2025(2)

Published: March 1, 2025

Long‐distance bird migration is one of the most metabolically and immunologically challenging feats in animal kingdom, with birds often needing to double their weight a matter days facing increased exposure novel pathogens. The physiological behavioural adaptations required survive such journeys may be facilitated by gut microbiome, diverse community symbiotic microbes that produce rare nutrients, fatty acids, immune compounds can confer rapid changing environmental conditions. However, causal role microbiome regulating physiology remains mystery. In this review, we synthesize current knowledge composition function during migration, outline possible mechanisms which changes could benefit migrants, identify future research priorities. We find active usually associated reduced diversity expansion several study‐specific taxa. Additionally, some microbial traits have been found correlate host condition fat deposits migration. there little understanding how relate parameters, molecular linking or underlying ecological, dietary, intrinsic drivers across migratory cycle. Our review draws from examples non‐migratory systems explore microbiomes adaptively regulate relevant highlight need for studies connect circulating metabolites experimental test metabolite dynamics controlled settings. Given its demands ubiquity, presents an excellent model system investigate adaptive potential natural populations.

Language: Английский

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Large Yearly Fluctuations in Congregation Sizes of Migratory Danainae Butterflies in the Western Ghats, India

Biotropica, Journal Year: 2025, Volume and Issue: 57(3)

Published: May 1, 2025

ABSTRACT We documented the overwintering congregations of migratory Danainae butterflies (Nymphalidae) over six seasons in threatened tropical forests Western Ghats, India. Congregation sizes fluctuated drastically (> 90%), indicating vulnerability to chance events. Continued monitoring is needed explain these fluctuations and identify declining trends for timely conservation action.

Language: Английский

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White-crested elaenias (Elaenia albiceps chilensis) breeding across Patagonia exhibit similar spatial and temporal movement patterns throughout the year

PLoS ONE, Journal Year: 2024, Volume and Issue: 19(4), P. e0299954 - e0299954

Published: April 18, 2024

For migratory birds, events happening during any period of their annual cycle can have strong carry-over effects on the subsequent periods. The strength between non-breeding and breeding grounds be shaped by degree connectivity: whether or not individuals that breed together also migrate and/or spend season together. We assessed White-crested Elaenia (Elaenia albiceps chilensis), longest-distance migrant flycatcher within South America, which breeds in Patagonia spends as far north Amazonia. Using light-level geolocators, we tracked movements elaenias southern compared it with northern (1,365 km north) using Movebank Repository data. found successively used two separate regions while Brazilian grounds, already for site. Elaenias both showed high spread overlap among from sites, similar migration phenology, all suggests weak connectivity this species. Elucidating species, particular emphasis females juveniles, still requires further research across a wide expanse America. This information will critical to understanding possibly predicting species' response climate change rapid land-use changes.

Language: Английский

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High carbohydrate consumption increases lipid storage and promotes migratory flight in locusts

Journal of Experimental Biology, Journal Year: 2023, Volume and Issue: 226(3)

Published: Jan. 19, 2023

Migration allows animals to track favorable environments and avoid harmful conditions. However, migration is energetically costly, so migrating must prepare themselves by increasing their energy stores. Despite the importance of locust migratory swarms, we still understand little about physiology migration. During long-distance flight, locusts rely on lipid oxidation, despite fact that lipids are relatively rare in leaf-based diets. Therefore, other insect herbivores synthesize store from ingested carbohydrates, which also important for initial flight. These data suggest diets high carbohydrate should increase stores capacity flight locusts. As predicted, performance increased with an relative content food. termination was not associated complete depletion. We propose potential testable mechanisms might explain how macronutrient consumption can affect endurance.

Language: Английский

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Genetics and Evolution of Bird Migration

Annual Review of Animal Biosciences, Journal Year: 2023, Volume and Issue: 12(1), P. 21 - 43

Published: Oct. 31, 2023

Bird migration has long been a subject of fascination for humankind and is behavior that both intricate multifaceted. In recent years, advances in technology, particularly the fields genomics animal tracking, have enabled significant progress our understanding this phenomenon. review, we provide an overview latest advancements genetics bird migration, with particular focus on genomics, examine various factors contribute to evolution behavior, including climate change. Integration research from ecology, can enhance comprehension complex mechanisms involved inform conservation efforts rapidly changing world.

Language: Английский

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