Carry‐over effects of winter habitat quality on en route timing and condition of a migratory passerine during spring migration

Paxton, Kristina L.; Moore, Frank R.

doi:10.1111/jav.00614

Cited by 58 publications

(62 citation statements)

References 80 publications

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“…After crossing the Gulf of Mexico, migrants congregate in coastal habitats before moving on to breeding areas throughout North America (40,41). Migrating songbirds can move thousands of kilometers in just a few days (16,42), and we found that 3% of the migrants in coastal Texas harbored ticks across the Gulf of Mexico, over two-thirds (67%) of which were neotropical tick species not known to occur in the United States.…”

Section: Discussionmentioning

confidence: 92%

“…Additionally, we estimated a range for annual neotropical tick propagule pressure using the minimum and maximum values from species-specific infestation frequency across infested bird species. Although our data come from only a single field site, we assume migrants captured at this site are representative of neotropical migrants entering the United States, because (i) migratory birds that stop over along the northern coast of the Gulf of Mexico during spring breed across North American latitudes (40,41), and (ii) the only other study to systematically examine northbound spring migrants arriving in the United States found a remarkably similar exotic tick infestation prevalence (7).…”

Section: Pathogen Identificationmentioning

confidence: 99%

See 1 more Smart Citation

Avian Migrants Facilitate Invasions of Neotropical Ticks and Tick-Borne Pathogens into the United States

Cohen

Auckland

Marra

et al. 2015

Appl Environ Microbiol

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bMigratory birds have the potential to transport exotic vectors and pathogens of human and animal health importance across vast distances. We systematically examined birds that recently migrated to the United States from the Neotropics for ticks. We screened both ticks and birds for tick-borne pathogens, including Rickettsia species and Borrelia burgdorferi. Over two spring seasons (2013 and 2014), 3.56% of birds (n ‫؍‬ 3,844) representing 42.35% of the species examined (n ‫؍‬ 85) were infested by ticks. Ground-foraging birds with reduced fuel stores were most commonly infested. Eight tick species were identified, including seven in the genus Amblyomma, of which only Amblyomma maculatum/Amblyomma triste is known to be established in the United States. Most ticks on birds (67%) were neotropical species with ranges in Central and South America. Additionally, a single Ixodes genus tick was detected. A total of 29% of the ticks (n ‫؍‬ 137) and no avian blood samples (n ‫؍‬ 100) were positive for infection with Rickettsia species, including Rickettsia parkeri, an emerging cause of spotted fever in humans in the southern United States, a species in the group of Rickettsia monacensis, and uncharacterized species and endosymbionts of unknown pathogenicity. No avian tick or blood samples tested positive for B. burgdorferi, the etiologic agent of Lyme disease. An extrapolation of our findings suggests that anywhere from 4 to 39 million exotic neotropical ticks are transported to the United States annually on migratory songbirds, with uncertain consequences for human and animal health if the current barriers to their establishment and spread are overcome.T he large-scale seasonal movements of migrants provide opportunities for bird-associated parasites to rapidly disperse over large spatial scales, with implications for human and animal health (1, 2). Birds are increasingly recognized for their roles as reservoirs and hosts to vectors for a suite of emerging zoonotic diseases, including West Nile virus, Lyme disease, influenza A virus, and H5N1 avian influenza virus (3, 4), and they have been implicated in the range expansion and introduction of new pathogens. Additionally, migratory birds have the potential to disperse ectoparasites and their associated pathogens over long distances (5-7).Migratory birds that overwinter in Central and South America are frequently infested with Amblyomma tick species (family Ixodidae), which are common carriers of Rickettsia species parasites (8-11). There are 45 Amblyomma species endemic to the Neotropics (12), where parasitism rates on birds have been found to vary from 6.5% in Panama (10) to 40% in the Brazilian Amazon (9). Rickettsia species of bacteria are transmitted to vertebrates by arthropod vectors, including Amblyomma ticks. The pathogenicity of many tick-borne Rickettsia species is unknown, but there are Ͼ25 recognized species in the zoonotic spotted fever group, including those that cause Rocky Mountain spotted fever, Mediterranean spotted fever, North Asian tick typhus, and Q...

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Section: Discussionmentioning

confidence: 92%

Section: Pathogen Identificationmentioning

confidence: 99%

Avian Migrants Facilitate Invasions of Neotropical Ticks and Tick-Borne Pathogens into the United States

Cohen

Auckland

Marra

et al. 2015

Appl Environ Microbiol

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“…Moore and Yong ). If a migratory bird expects to ‘catch‐up’ with the overall time‐schedule and maintain a margin of safety in the face of anticipated energetic demands, she must refuel faster than average (Paxton and Moore ). Birds that experience en route delays in their migration schedules may arrive late and experience negative reproductive consequences (Smith and Moore , , Moore et al ).…”

Section: Discussionmentioning

confidence: 99%

Effect of fuel deposition rate on departure fuel load of migratory songbirds during spring stopover along the northern coast of the Gulf of Mexico

Moore

Covino

Lewis

et al. 2017

Journal of Avian Biology

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Migrants are generally assumed to minimize their overall migration time by adjusting their departure fuel loads (DFL) in relation to anticipated and experienced fuel deposition rates (FDRs). We utilized a 21‐yr long migration banding station dataset to examine the relationship between FDR and DFL during spring migration in six Nearctic‐Neotropical migratory songbird species during stopover along the northern coast of the Gulf of Mexico (GOM) following trans‐gulf flight. Estimates of fuel stores, stopover durations, and FDRs from our long term migration data set were combined to determine DFL. We expected and found that migrants across all six species adjust their DFL to the rate at which they deposit fuel reserves. This robust finding suggests that songbird migrants are sensitive to time constraints during spring passage presumably to fine‐tune their stopover schedule in relation to experienced and anticipated habitat quality. Two of the species studied showed an effect of age on the FDR–DFL relationship: one was consistent with the expectation that older birds would be less sensitive to changes in FDR, while the second was contrary to our expectations and likely suggesting an age‐dependent response to habitat quality. We found sex‐dependent differences consistent with male DFL being more sensitive to FDR in only two of six species studied, and argue that both males and females are time constrained during spring passage in relation to arrival at breeding destinations. The positive relationship between FDR and DFL among all species and for age and sex groups in some species reflects a migration strategy sensitive to time.

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“…In particular, winter habitat is known to influence spring migration timing and energetic condition (Bearhop et al 2004, Boone et al 2010, González-Prieto and Hobson 2013, Paxton and Moore 2015, Graham et al 2016. In particular, winter habitat is known to influence spring migration timing and energetic condition (Bearhop et al 2004, Boone et al 2010, González-Prieto and Hobson 2013, Paxton and Moore 2015, Graham et al 2016.…”

Section: Introductionmentioning

confidence: 99%

The strength of migratory connectivity for birds en route to breeding through the Gulf of Mexico

et al. 2018

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The strength of migratory connectivity is a measure of the cohesion of populations among phases of the annual cycle, including breeding, migration, and wintering. Many Nearctic-Neotropical species have strong migratory connectivity between breeding and wintering phases of the annual cycle. It is less clear if this strength persists during migration when multiple endogenous and exogenous factors may decrease the cohesion of populations among routes or through time along the same routes. We sampled three bird species, American redstart Setophaga ruticilla, ovenbird Seiurus aurocapilla, and wood thrush Hylocichla mustelina, during spring migration through the Gulf of Mexico region to test if breeding populations differentiate spatially among migration routes or temporally along the same migration routes and the extent to which withinpopulation timing is a function of sex, age, and carry-over from winter habitat, as measured by stable carbon isotope values in claws (δ 13 C). To make quantitative comparisons of migratory connectivity possible, we developed and used new methodology to estimate the strength of migratory connectivity (MC) from probabilistic origin assignments identified using stable hydrogen isotopes in feathers (δ 2 H). We found support for spatial differentiation among routes by American redstarts and ovenbirds and temporal differentiation along routes by American redstarts. After controlling for breeding origin, the timing of American redstart migration differed among ages and sexes and ovenbird migration timing was influenced by carry-over from winter habitat. The strength of migratory connectivity did not differ among the three species, with each showing weak breeding-to-spring migration MC relative to prior assessments of breeding-wintering connectivity. Our work begins to fill an essential gap in methodology and understanding of the extent to which populations remain together during migration, information critical for a full annual cycle perspective on the population dynamics and conservation of migratory animals.

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Carry‐over effects of winter habitat quality on en route timing and condition of a migratory passerine during spring migration

Cited by 58 publications

References 80 publications

Avian Migrants Facilitate Invasions of Neotropical Ticks and Tick-Borne Pathogens into the United States

Avian Migrants Facilitate Invasions of Neotropical Ticks and Tick-Borne Pathogens into the United States

Effect of fuel deposition rate on departure fuel load of migratory songbirds during spring stopover along the northern coast of the Gulf of Mexico

The strength of migratory connectivity for birds en route to breeding through the Gulf of Mexico

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