Arrival timing and hematological parameters in Gray Catbirds (Dumetella carolinensis)

Hatch, Margret I.; Smith, Robert J.; Owen, Jennifer C.

doi:10.1007/s10336-009-0487-y

Cited by 24 publications

(18 citation statements)

References 47 publications

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“…In support of this, we found that males arriving with high androgen have high haematocrit. Further, in agreement with previous studies (Ninni et al 2004, Hatch et al 2010), we found that haematocrit was positively associated with early arrival. Together, these findings suggest that males who elevate androgen benefit from associated erythropoietic effects, increasing oxygen capacity.…”

Section: Discussionsupporting

confidence: 93%

“…However, researchers have repeatedly found that changes in haematocrit are a physiological component of the migratory state, often independent of energetic condition. Haematocrit increases in migratory birds around the time of migration (Wingfield and Farner 1980, Bairlein and Totzke 1992, Morton 1994, Piersma et al 1996), decreases following arrival at breeding areas in males (Saino et al 1997), and has been positively associated with early arrival (Ninni et al 2004, Hatch et al 2010). Androgen‐induced erythrocyte synthesis could result in greater oxygen carrying capacity during migration in birds, increasing flight performance.…”

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confidence: 99%

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Migration phenology and winter habitat quality are related to circulating androgen in a long-distance migratory bird

Tonra

Marra²,

Holberton³

2011

Journal of Avian Biology

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In migratory birds, the timing of departure from wintering grounds is often dependant on the quality of habitat on an individual's territory and may influence individual fitness, resulting in an interaction of life history stages across large geographical distances. American redstart Setophaga ruticilla males who overwinter in high quality habitats arrive early to breed and subsequently produce more offspring than late arrivers. Since many migratory species overlap vernal migration with the physiological transition to breeding, we examined if breeding preparation plays a role in this seasonal interaction. We tested the hypothesis that early arriving male redstarts from high quality winter habitats are in superior breeding condition by simultaneously measuring winter habitat quality (stable‐carbon isotopes) and breeding preparation (circulating androgen, cloacal protuberance (CP) diameter) upon arrival at breeding grounds. Compared with late arrivers, early arriving males were from higher quality winter habitats and had higher androgen, but smaller CPs. Males arriving with higher androgen were in more advanced physiological migratory condition, as measured by haematocrit. Early arrivers were more likely to successfully breed, but there was no significant relationship between androgen upon arrival and breeding success. One possible explanation for these relationships is that androgen measured during arrival is most relevant in a migratory context, such that birds with high androgen may benefit from effects on migratory condition, positively influencing fitness through earlier arrival.

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Section: Discussionsupporting

confidence: 93%

mentioning

confidence: 99%

Migration phenology and winter habitat quality are related to circulating androgen in a long-distance migratory bird

Tonra

Marra²,

Holberton³

2011

Journal of Avian Biology

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“…ISSN 0004-8038, electronic ISSN 1938-4254. © (Hatch et al 2010, Knowles et al 2010. Although the widespread use of these techniques has opened many new and exciting lines of inquiry, with the increased regularity of blood collection comes an increased need for researchers to ensure that they safely handle birds and minimize threats to survival.…”

Section: Análisis Multiestado De Marcado-recaptura Revela Ausencia Dementioning

confidence: 99%

Multistate Mark–Recapture Analysis Reveals No Effect of Blood Sampling on Survival and Recapture of Eastern Kingbirds (Tyrannus tyrannus)

Redmond

Murphy

2011

The Auk

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The experimentally supported and prevailing opinion is that blood sampling has few to no long-term effects on survival of birds when conducted properly, and blood sampling has become a vital addition to the toolbox of many ornithologists. However, many of the studies that concluded that blood sampling had negligible effects on birds used approaches that did not account for temporary emigration and probability of capture. To date, the only study to have done so found that blood sampling had a strong negative efifect on survival. We conducted a mark-recapture analysis of 8 years of banding and bleeding data on Eastern Kingbirds {Tyrannus tyrannus) to determine whether survival was negatively influenced by blood sampling. Our analyses adjusted for temporary emigration and probability of recapture and accounted for (1) transitions between the bled and the nonbled state and (2) a change in protocol roughly midway through the study that resulted in a change from single to often multiple (and larger) draws of blood per year from single individuals. We found that survival rates of nonbled (0.61) and bled (0.67) males were statistically indistinguishable and that bled females had a higher probability of survival than nonbled females (0.68 and 0.58, respectively). The change to larger and more frequent blood samples was also not associated with a change in survival. Our data show that when accepted protocols were followed, blood sampling had no detectable influence on the survival of adult Eastern Kingbirds. Whether this applies generally awaits analyses using similarly rigorous methods on other species.RESUMEN.-Una opinión prevalente que ha sido apoyada experimentalmente es que la toma de muestras de sangre tiene pocos o ningún efecto de largo plazo sobre la supervivencia de las aves cuando se hace adecuadamente. Además, el muestreo de sangre se ha convertido en una adición vital a la caja de herramientas de muchos ornitólogos. Sin embargo, muchos de los estudios que concluyeron que la toma de muestras de sangre tenia efectos despreciables sobre las aves emplearon enfoques que no tuvieron en cuenta la emigración temporal ni la probabilidad de captura. A la fecha, el único estudio que tuvo en cuenta estos factores encontró que la toma de muestras de sangre tenía un efecto negativo fuerte sobre la supervivencia. Realizamos un análisis de marcado-recaptura de 8 años de datos de anillado y toma de muestras en Tyrannus tyrannus para determinar si la supervivencia era influenciada negativamente por la toma de muestras de sangre. Nuestros análisis fueron ajustados de acuerdo a la emigración temporal y a la probabilidad de recaptura y tuvieron en cuenta (1) las transiciones entre el estado de aves a las que les tomaron sangre y las que no, y (2) un cambio en protocolo más o menos a la mitad del estudio, que llevó a un cambio de una sola a frecuentemente varias (y más grandes) tomas de sangre por año en aves individuales. Encontramos que las tasas de supervivencia de los machos a los que no se les tomaron muestras de sangre (0.61)...

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“…Within populations, phenotypic correlations have been established between arrival dates and wing shape (Bowlin, 2007; Choi et al. , 2010) and arrival dates and individual condition (Hatch et al. , 2010).…”

Section: Introductionmentioning

confidence: 99%

Quantitative genetics of migration syndromes: a study of two barn swallow populations

Teplitsky¹,

Mouawad²,

Balbontı́n³

et al. 2011

Journal of Evolutionary Biology

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Migration is a complex trait although little is known about genetic correlations between traits involved in such migration syndromes. To assess the migratory responses to climate change, we need information on genetic constraints on evolutionary potential of arrival dates in migratory birds. Using two long‐term data sets on barn swallows Hirundo rustica (from Spain and Denmark), we show for the first time in wild populations that spring arrival dates are phenotypically and genetically correlated with morphological and life history traits. In the Danish population, length of outermost tail feathers and wing length were negatively genetically correlated with arrival date. In the Spanish population, we found a negative genetic correlation between arrival date and time elapsed between arrival date and laying date, constraining response to selection that favours both early arrival and shorter delays. This results in a decreased rate of adaptation, not because of constraints on arrival date, but constraints on delay before breeding, that is, a trait that can be equally important in the context of climate change.

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Arrival timing and hematological parameters in Gray Catbirds (Dumetella carolinensis)

Cited by 24 publications

References 47 publications

Migration phenology and winter habitat quality are related to circulating androgen in a long-distance migratory bird

Migration phenology and winter habitat quality are related to circulating androgen in a long-distance migratory bird

Multistate Mark–Recapture Analysis Reveals No Effect of Blood Sampling on Survival and Recapture of Eastern Kingbirds (Tyrannus tyrannus)

Quantitative genetics of migration syndromes: a study of two barn swallow populations

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