scholarly journals Migratory Movements of Sharp-Shinned Hawks (Accipiter Striatus) Captured in New Mexico in Relation to Prevalence, Intensity, and Biogeography of Avian Hematozoa

The Auk ◽  
2004 ◽  
Vol 121 (3) ◽  
pp. 837-846
Author(s):  
Ruth B. Smith ◽  
Ellis C. Greiner ◽  
Blair O. Wolf
Keyword(s):  
New Mexico ◽  
North America ◽  
Hydrogen Isotope ◽  
Migratory Birds ◽  
Parasite Fauna ◽  
Blood Parasites ◽  
Infection Prevalence ◽  
Accipiter Striatus ◽  
Stable Hydrogen Isotope ◽  
Hydrogen Isotope Ratios

Abstract Previous interspecific studies have shown that migratory birds have a higher prevalence of blood parasites than nonmigratory birds. It is thought that birds that move greater distances are exposed to a larger parasite fauna, because of uneven distribution of vectors that carry such parasites. Current hypotheses also suggest that the stress of migration may allow parasites to persist, by weakening the immune system and allowing latent infections to recur. We captured migrating hatching-year Sharp-shinned Hawks (Accipiter striatus) in New Mexico and estimated natal latitudes of each individual by analyzing stable-hydrogen isotope ratios of feathers. That enabled us to estimate distances traveled up to point of capture. We also collected blood to quantify hematozoan infection prevalence and intensity. We related distance traveled to prevalence and intensity of hematozoan infections. Contrary to previous hypotheses, our results show no relationship between distance traveled by migrants and prevalence and intensity of hematozoan infections. Of 75 individuals examined, 24% were infected with Leucocytozoon toddi, 37% with Haemoproteus elani, and 5% with H. janovyi. To our knowledge, this is the first documented occurrence of H. janovyi in North America and in Sharp-shinned Hawks. Our stable-hydrogen isotope analyses indicated that H. janovyi was detected only in birds that originated in southwestern North America, which may be of significance in regard to biogeography of that parasite species.

scholarly journals A Geographic-Information-System Approach to Estimating the Origin of Migratory Raptors in North America Using Stable Hydrogen Isotope Ratios in Feathers

The Auk ◽  
2006 ◽  
Vol 123 (3) ◽  
pp. 822-835 ◽  
Author(s):  
Casey A. Lott ◽  
Jeff P. Smith
Keyword(s):  
North America ◽  
North American ◽  
Regional Variation ◽  
Hydrogen Isotope ◽  
Reference Sample ◽  
Bird Species ◽  
Strong Relationship ◽  
Isotope Ratios ◽  
Stable Hydrogen Isotope ◽  
Hydrogen Isotope Ratios

Abstract Analysis of stable hydrogen isotope ratios in feathers (δDf) is a promising method for investigating population connectivity in migratory birds. Stable hydrogen isotope ratios in precipitation (δDp) vary across North America with respect to latitude, elevation, and seasonal air-mass trajectories. A strong relationship between δDf and δDp at locations of feather growth has been documented for several bird species. Some studies have used measurements of δDf to plot the origins of migrants on maps of long-term weighted-average, growing-season North American δDp (hereafter “δDp maps”) using the observed relationship between δDf and δDp from a reference sample of known-origin birds. The accuracy of this method depends on the strength of the δDf and δDp relationship and accuracy of the δDp maps. Recently, a high-resolution (1-km2) model of North American δDp was published (Meehan et al. 2004) that accounts for the effect of elevation on δDp where previous models did not. We compared δDf measurements from a geographically diverse sample of 264 raptor feathers with δDp estimates for feather-sample locations. We documented a strong relationship between raptor δDf and δDp across North America. However, we also documented substantial regional variation in this relationship. We created a “base map” of North American raptor δDf that incorporated the regional variation described by our sample. We plotted δDf values from migrant Sharp-shinned Hawks (Accipiter striatus) captured in eastern Nevada directly on this map to demonstrate how it can be used to view the origins of migrants. Un Procedimiento Basado en Sistemas de Información Geográfica para Estimar el Origen de las Aves Rapaces Migratorias en Norte América Usando los Cocientes de Isótopos Estables de Hidrógeno Presentes en las Plumas

scholarly journals Round-trip across the Sahara: Afrotropical Painted Lady butterflies recolonize the Mediterranean in early spring

2018 ◽  
Vol 14 (6) ◽  
pp. 20180274 ◽  
Author(s):  
Gerard Talavera ◽  
Clément Bataille ◽  
Dubi Benyamini ◽  
Martin Gascoigne-Pees ◽  
Roger Vila
Keyword(s):  
Hydrogen Isotope ◽  
Migratory Birds ◽  
Early Spring ◽  
Round Trip ◽  
Reverse Migration ◽  
Vanessa Cardui ◽  
Tangible Evidence ◽  
Stable Hydrogen Isotope ◽  
Sub Saharan ◽  
Work Supports

The Palearctic–African migratory circuit has been typically associated with birds. Very few insects are known to endure annual trans-Saharan circuits, but the Painted Lady butterfly ( Vanessa cardui ) is an exception. While it was demonstrated that this species massively migrates from Europe to the Afrotropics during the autumn, the existence of a reverse migration from the Afrotropics to Europe in the early spring remains hypothetical. Here, we analysed wing stable hydrogen isotope values (δ 2 H) of V. cardui migrants collected from February to April across the circum-Mediterranean region. We assessed their region of natal origin by comparing their wing isotope signature predicted δ 2 H values (isoscape). The results unambiguously demonstrate a sub-Saharan origin for many individuals, especially those collected in February, representing the first tangible evidence for a reverse northwards trans-Saharan migration in spring. This work supports the view that the Afrotropics (mostly exploited from September to February) is key in the V. cardui Palearctic–African population dynamics. This species relies on both temperate and tropical habitats to complete their multigenerational cycle, an unprecedented adaptation for butterflies and for most migratory insects. Such a migratory circuit has strong parallelisms with those of migratory birds.

scholarly journals Stable Isotope Evidence Links Breeding Geography and Migration Timing in Wood Warblers (Parulidae)

The Auk ◽  
2006 ◽  
Vol 123 (2) ◽  
pp. 431-437 ◽  
Author(s):  
Jeffrey F. Kelly
Keyword(s):  
Hydrogen Isotope ◽  
Life Histories ◽  
Isotope Ratios ◽  
Interspecific Variation ◽  
Autumn Migration ◽  
Breeding Sites ◽  
Migration Timing ◽  
Wood Warblers ◽  
Stable Hydrogen Isotope ◽  
Hydrogen Isotope Ratios

AbstractTracking seasonal movements of songbirds is a key step in understanding the annual cycle of migrants. To better understand autumn migration of wood warblers, I analyzed stable-hydrogen isotope ratios of feathers collected from three species captured during stopover at the Bosque del Apache National Wildlife Refuge, New Mexico. To assess the form and strength of the relationship between timing of migration and breeding origins, I regressed stable-hydrogen isotope ratios of feathers against date of capture. These analyses indicated that Orange-crowned Warblers (Vermivora celata) and Common Yellowthroats (Geothlypis trichas) breeding in the southern portion of these species' ranges precede their northern conspecifics in autumn migration. By contrast, Yellow Warblers (Dendroica petechia) from northern breeding sites arrived before more southerly breeding conspecifics. This pattern is similar to that reported previously in Wilson's Warbler (Wilsonia pusilla). These findings suggest that, among wood warblers, (1) timing of autumn migration is often strongly related to breeding location and (2) interspecific variation in the direction of this relationship is large. The direction and strength of these patterns have implications for our understanding of inter- and intraspecific geographic variation in the life histories of migrants.Evidencia de Isótopos Estables Conecta la Geografía de Nidificación con el Momento de la Migración en Especies de Parulidae

scholarly journals Using Hydrogen Isotope Geochemistry to Estimate the Natal Latitudes of Immature Cooper's Hawks Migrating Through the Florida Keys

The Condor ◽  
2001 ◽  
Vol 103 (1) ◽  
pp. 11-20 ◽  
Author(s):  
Timothy D. Meehan ◽  
Casey A. Lott ◽  
Zachary D. Sharp ◽  
Ruth B. Smith ◽  
Robert N. Rosenfield ◽  
...  
Keyword(s):  
Hydrogen Isotope ◽  
Isotope Geochemistry ◽  
Florida Keys ◽  
Accipiter Cooperii ◽  
New Information ◽  
Stable Hydrogen Isotope ◽  
Males And Females ◽  
Hydrogen Isotope Ratios ◽  
The Relationship ◽  
Cooper's Hawks

Abstract We constructed a regression model for the relationship between stable-hydrogen isotope ratios in immature Cooper's Hawk (Accipiter cooperii) feathers (δDf) and precipitation in areas where feathers were grown (δDp) across much of the latitudinal and longitudinal extent of the species' breeding range. We used our model to estimate δDp values from δDf values of immature Cooper's Hawks captured during migration in the Florida Keys. We compared these estimated δDp values to a published map of δDp values of North American precipitation to learn the latitudinal origins of migrants. We reviewed previous migration banding studies to estimate the longitudinal range of migrants. Our analysis suggested that most of the immature Cooper's Hawks migrating through the Keys originated in natal areas in the Mid-Atlantic and Southeast regions of the continent. We found no difference in the passage date of northern and southern birds or in the latitudinal origins of males and females. This new information will aid in the interpretation of population trends generated from the ongoing migration count in the Keys.

Using Stable Hydrogen Isotope Analysis of Feathers to Delineate Origins of Harvested Sandhill Cranes in the Central Flyway of North America

Waterbirds ◽  
2006 ◽  
Vol 29 (2) ◽  
pp. 137-147 ◽  
Author(s):  
Keith A. Hobson ◽  
Steven Van Wilgenburg ◽  
Leonard I. Wassenaar ◽  
Helen Hands ◽  
William P. Johnson ◽  
...  
Keyword(s):  
North America ◽  
Hydrogen Isotope ◽  
Isotope Analysis ◽  
Stable Hydrogen Isotope ◽  
Sandhill Cranes ◽  
Central Flyway

Potential and Limits in Detecting Altitudinal Movements of Bats using Stable Hydrogen Isotope Ratios of Fur Keratin

2011 ◽  
Vol 13 (2) ◽  
pp. 431-438 ◽  
Author(s):  
Anna Erzberger ◽  
Ana G. Popa-Lisseanu ◽  
Gerlind U. C. Lehmann ◽  
Christian C. Voigt
Keyword(s):  
Hydrogen Isotope ◽  
Isotope Ratios ◽  
Stable Hydrogen Isotope ◽  
Hydrogen Isotope Ratios

Ecological and dietary correlates of stable hydrogen isotope ratios in fur and body water of syntopic tropical bats

Ecology ◽  
2013 ◽  
Vol 94 (2) ◽  
pp. 346-355 ◽  
Author(s):  
Christian C. Voigt ◽  
Karin Schneeberger ◽  
Anja Luckner
Keyword(s):  
Hydrogen Isotope ◽  
Isotope Ratios ◽  
Body Water ◽  
Stable Hydrogen Isotope ◽  
Hydrogen Isotope Ratios
Sign in / Sign up

Export Citation Format

Share Document