Patterns of Fuel Use and Storage in Migrating Passerines in Relation to Fruit Resources at Autumn Stopover Sites

Smith, Sheryl S.; McWilliams, Scott R.

doi:10.1525/auk.2009.09139

Cited by 61 publications

(55 citation statements)

References 44 publications

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“…However, diet may also drive some of the interspecific differences we observed. Vireos are more frugivorous during the fall migratory period than blackpolls (Parrish 1997, Smith andMcWilliams 2010). A frugivore's greater capacity for rapid fat mobilization (Bairlein andGwinner 1994, Smith et al 2007) could aid vireos in making shorter, less frequent stops and longer flights between stops.…”

Section: Discussionmentioning

confidence: 99%

Prolonged stopover and consequences of migratory strategy on local-scale movements within a regional songbird staging area

Smetzer

King

2018

The Auk

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Section: Discussionmentioning

confidence: 99%

Prolonged stopover and consequences of migratory strategy on local-scale movements within a regional songbird staging area

Smetzer

King

2018

The Auk

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“…During autumn migration, many species of songbirds rely on seasonally abundant fruit to refuel during stopovers, and the presence of fruiting species may be more important than habitat structure in determining habitat use by birds during migration (Eggers, 2000;Parrish, 1997;Sapir et al, 2004;Smith and McWilliams, 2014;Smith et al, 2007;Suthers et al, 2000). Birds consume fruit during migration as an important source of fat (Smith and McWilliams, 2010;Smith et al, 2007;Thompson and Willson, 1979), but there is also evidence that birds select fruits based on dietary antioxidant content ( Fig. 3; Bolser et al, 2013;Schaefer et al, 2008;Skrip et al, 2015).…”

Section: Evidence That Birds Benefit From Choosing Foods High In Dietmentioning

confidence: 99%

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

Cooper-Mullin

McWilliams

2016

Journal of Experimental Biology

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

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“…We have not included these measures here because the former suffers methodological issues and may not provide reliable estimates of mass change under a variety of conditions (Bayly et al 2012, Minias andKaczmarek 2013), while the latter is costly and may not reflect fueling performance over periods of days (Smith and McWilliams 2010). Importantly, neither of these approaches discriminates between mass changes in birds undertaking multiday stopovers versus transients.…”

Section: Indicators Of Habitat Qualitymentioning

confidence: 99%

Prioritizing tropical habitats for long-distance migratory songbirds: an assessment of habitat quality at a stopover site in Colombia

Bayly¹,

Gómez²,

Hobson³

et al. 2016

ACE

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ABSTRACT. Long-distance migratory birds are declining globally and migration has been identified as the primary source of mortality in this group. Despite this, our lack of knowledge of habitat use and quality at stopovers, i.e., sites where the energy for migration is accumulated, remains a barrier to designing appropriate conservation measures, especially in tropical regions. There is therefore an urgent need to assess stopover habitat quality and concurrently identify efficient and cost-effective methods for doing so. Given that fuel deposition rates directly influence stopover duration, departure fuel load, and subsequent speed of migration, they are expected to provide a direct measure of habitat quality and have the advantage of being measurable through body-mass changes. Here, we examined seven potential indicators of quality, including body-mass change, for two ecologically distinct Neotropical migratory landbirds on stopover in shade-coffee plantations and tropical humid premontane forest during spring migration in Colombia: (1) rate of body-mass change; (2) foraging rate; (3) recapture rate; (4) density; (5) flock size; (6) age and sex ratios; and (7) body-mass distribution. We found higher rates of mass change in premontane forest than in shade-coffee in Tennessee Warbler Oreothlypis peregrina, a difference that was mirrored in higher densities and body masses in forest. In Gray-cheeked Thrush Catharus minimus, a lack of recaptures in shade-coffee and higher densities in forest, also suggested that forest provided superior fueling conditions. For a reliable assessment of habitat quality, we therefore recommend using a suite of indicators, taking into account each species' ecology and methodological considerations. Our results also imply that birds stopping over in lower quality habitats may spend a longer time migrating and require more stopovers, potentially leading to important carryover effects on reproductive fitness. Evaluating habitat quality is therefore imperative prior to defining the conservation value of newly identified stopover regions.Priorisation de milieux tropicaux visant des passereaux migrateurs de longue distance : évaluation de la qualité de l'habitat dans une halte migratoire en Colombie RÉSUMÉ. Les oiseaux migrateurs de longue distance sont en diminution sur la planète et la migration a été pointée du doigt comme source primaire de mortalité chez ce groupe. Malgré ce constat, notre manque de connaissance sur l'utilisation et la qualité de l'habitat aux haltes migratoires -c.-à-d. les sites où les oiseaux accumulent l'énergie en vue de la migration -limite notre capacité à déterminer les mesures de conservation appropriées, spécialement dans les régions tropicales. L'évaluation de la qualité de l'habitat aux haltes est donc urgente, de même que la détermination de méthodes efficaces et rentables pour s'y prendre. Étant donné que les taux d'accumulation d'énergie influent directement sur la durée de séjour aux haltes, la charge d'énergie au départ d'une halte et la vitesse subséqu...

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Patterns of Fuel Use and Storage in Migrating Passerines in Relation to Fruit Resources at Autumn Stopover Sites

Cited by 61 publications

References 44 publications

Prolonged stopover and consequences of migratory strategy on local-scale movements within a regional songbird staging area

Prolonged stopover and consequences of migratory strategy on local-scale movements within a regional songbird staging area

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

Prioritizing tropical habitats for long-distance migratory songbirds: an assessment of habitat quality at a stopover site in Colombia

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