Environmental factors in migratory route decisions: a case study on Greenlandic Arctic Terns (Sterna paradisaea)

Hensz, Christopher Michael

doi:10.1515/ami-2015-0004

Cited by 7 publications

(8 citation statements)

References 44 publications

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“…Such patterns in Arctic terns were first documented by McKnight et al (2013) as birds from Alaska migrated along the west coast of the Americas. Similar patterns were described in a study where terns were tracked from Greenland and Iceland (Hensz 2015). During both migration periods, one of the main stopover areas of our tracked birds corresponded with the well-known refuelling area for migrating seabirds in the North Atlantic (Catry et al 2011, Sittler et al 2011, Gilg et al 2013, also known as the North Atlantic drift province (Longhurst 2010).…”

Section: Migration Patterns and The Environmentsupporting

confidence: 83%

Seasonally specific responses to wind patterns and ocean productivity facilitate the longest animal migration on Earth

Hromádková

Pavel

Flousek³

et al. 2020

Mar. Ecol. Prog. Ser.

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Migratory strategies of animals are broadly defined by species’ eco-evolutionary dynamics, while behavioural plasticity according to the immediate environmental conditions en route is crucial for energy efficiency and survival. The Arctic tern Sterna paradisaea is known for its remarkable migration capacity, as it performs the longest migration known by any animal. Yet, little is known about the ecology of this record-breaking journey. Here, we tested how individual migration strategies of Arctic terns are adapted to wind conditions and fuelling opportunities along the way. To this end, we deployed geolocators on adult birds at their breeding sites in Svalbard, Norway. Our results confirm fundamental predictions of optimal migration theory: Arctic terns tailor their migration routes to profit from (1) tailwind support during the movement phase and (2) food-rich ocean areas during the stopover phase. We also found evidence for seasonally distinct migration strategies: terns prioritize fuelling in areas of high ocean productivity during the southbound autumn migration and rapid movement relying on strong tailwind support during the northbound spring migration. Travel speed in spring was 1.5 times higher compared to autumn, corresponding to an increase in experienced wind support. Furthermore, with their pole-to-pole migration, Arctic terns experience approximately 80% of all annual daylight on Earth (the most by any animal), easing their strictly diurnal foraging behaviour. However, our results indicate that during migration daylight duration is not a limiting factor. These findings provide strong evidence for the importance of interaction between migrants and the environment in facilitating the longest animal migration on Earth.

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Section: Migration Patterns and The Environmentsupporting

confidence: 83%

Seasonally specific responses to wind patterns and ocean productivity facilitate the longest animal migration on Earth

Hromádková

Pavel

Flousek³

et al. 2020

Mar. Ecol. Prog. Ser.

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“…There are several examples showing that other species track NPP during migration. In the marine environment, the arctic tern fall migration routes are driven by the increase in NPP and winds, while the main factor during the spring migration is the decrease of sea surface temperature (Hensz, ). However, in both periods, high levels of NPP slow down travelling speeds, suggesting that terns adjust their migratory strategy to profit from available resources.…”

Section: Discussionmentioning

confidence: 78%

“…There is a growing evidence that extant species profit and track resources during migration (e.g. Helbig, ; La Sorte et al ., ; Hensz, ; Thorup et al ., ). Although productivity itself depends strongly on climate, a recent study tracking cuckoos during migration (Thorup et al ., ) has shown that migratory birds track areas at the peak of productivity compared to the annual mean.…”

Section: Discussionmentioning

confidence: 97%

“…Our results cannot disentangle if NPP has been one of the main drivers of bird migration or it is a consequence of bird migratory behaviour, but it seems clear that there is and has been a tight relationship between migratory behaviour and productivity in birds. There is a growing evidence that nor present or past climates but productivity peaks drive bird migratory movements (Helbig, ; La Sorte et al ., ; Hensz, ; Thorup et al ., ), and this relationship seems to be at the root of the rise of bird migratiory strategies. The relationship between NPP and migration at deeper temporal scales needs to be further explored in other bird clades, both subject to past glaciations and from areas with low exposure to ice, as different factors may be acting, alone or in interaction, in different geographic regions.…”

Section: Discussionmentioning

confidence: 99%

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Productivity as the main factor correlating with migratory behaviour in the evolutionary history of warblers

et al. 2018

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The evolution of migration in birds and its causes are still subject of debate. Recent studies tracking current bird migration have identified peaks in net primary productivity (NPP) as a main driver of bird migratory behaviour. However, it is unclear which variables may have played a major role in the evolution of bird migration at deeper phylogenetic levels. Here, we used phylogenetic comparative methods to assess whether the evolutionary patterns of migratory distances, as a proxy for migratory behaviour, are correlated with several biometric, climatic and productivity variables in a phylogenetic context, using Sylvia warblers as a case study. Our results recover NPP in the breeding range and during the breeding season as the variable with stronger positive correlation with migratory distances, being always included in the best models considering all potential variables. Several climatic variables show a correlation with the evolution of migration, but those are also tightly correlated with NPP. Among morphological variables, migratory lineages tend to have longer wings than sedentary ones. Although NPP has been identified as a driver of migratory behaviour in current species, in a phylogenetic scale it is not possible to disentangle if it was a main driver in the evolution of bird migratory behaviour or a consequence of it, yet migration and NPP seem to be tightly related today and along the long evolutionary history of these passerines.

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“…O segundo modelo apresentado corresponde a uma extensão do modelo de dispersão de Johnson e Wehrly, que associa o parâmetro de concentração da von Mises à uma única covariável com suporte na reta. Hensz (2015) utilizou esse modelo para investigar os fatores ambientais que influenciam a rota de migração das andorinhas do ártico. Por fim, o terceiro modelo provém da combinação direta entre os dois primeiros e, portanto, foi denotado por modelo misto.…”

Section: Modelo Von Mises De Regressãounclassified

Extensões do resíduo quantílico

Andrade¹

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Agradeço ao meu filho Carlos, minha maior fonte de motivação.À Deus, pelas oportunidades e condições que tive até chegar aqui.Aos meus pais, Thales e Alessandra, que me ensinaram desde cedo o valor do estudo. Mesmo frente às dificuldades, sempre me proporcionaram as melhores condições de estudo e conforto. Por todo suporte e incentivo para que eu alcançasse meus sonhos. Meus sucessos são e sempre serão divididos com vocês.Ao meu irmão Iago e sua esposa Láisa, por se fazerem presentes nos cuidados com meus pais, já que a distância geográfica não me permite estar perto o quanto eu gostaria.Ao meu esposo Alessandro, por todo apoio e compreensão. Por ouvir com tanta atenção quando explico algo sobre minha pesquisa, mesmo não entendendo a maioria das palavras.Ao meu orientador, Gustavo, pela confiança em me aceitar como orientanda e pelo saber que transmitiu. Por ser presente em todas as etapas do doutorado, sempre disposto a me ouvir, ajudar, incentivar e corrigir. Sobretudo, por todo respeito e compreensão, que sem dúvidas tornaram essa caminhada mais leve. Por viabilizar nossas reuniões semanais durante a gestação e após o nascimento do meu filho, adequando seus horários às sonecas do Carlos.À todos os funcionários e professores do ICMC-USP e DEs-UFSCar, por serem sempre cordiais, atenciosos e dedicados, em especial ao Julio Cezar de Barros e à Monique da Conceição, e aos professores Alexsandro Giacomo Grimbert Gallo e Daiane Aparecida Zuanetti.Ao professor Rinaldo Artes, pela enorme contribuição no Capítulo 2. À UNIVESP, pelo apoio financeiro e oportunidade de vivência prática da docência, podendo também estar no papel de orientadora de alunos da graduação.Agradeço aos membros da banca examinadora, Cibele Russo Maria Novelli, Cristian Marcelo Villegas Lobos, Manoel dos Santos Neto e Tiago Maia Magalhães, pelo interesse, disponibilidade e pelas valiosas críticas e sugestões ao trabalho.O presente trabalho foi realizado com apoio da Coordenação de Aperfeiçoamento de Pessoal de Nível Superior -Brasil (CAPES) -Código de Financiamento 001.Palavras-chave: análise de diagnóstico, regressão beta inflacionada, regressão circular, resíduo quantílico, seleção de modelos.

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Environmental factors in migratory route decisions: a case study on Greenlandic Arctic Terns (Sterna paradisaea)

Cited by 7 publications

References 44 publications

Seasonally specific responses to wind patterns and ocean productivity facilitate the longest animal migration on Earth

Seasonally specific responses to wind patterns and ocean productivity facilitate the longest animal migration on Earth

Productivity as the main factor correlating with migratory behaviour in the evolutionary history of warblers

Extensões do resíduo quantílico

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