Adjustments and Exploitation of Body Stores During Post-Juvenile Molt in Common Snipe<i>Gallinago gallinago</i>

Minias, Piotr; Kaczmarek, Krzysztof; Włodarczyk, Radosław; Janiszewski, Tomasz

doi:10.1675/063.033.0115

Cited by 10 publications

(30 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Minias et al . ). For Ruff Philomachus pugnax , a highly size‐dimorphic species with males much larger than females, regression equations were calculated separately for each sex.…”

Section: Methodsmentioning

confidence: 97%

Wing shape and migration in shorebirds: a comparative study

Minias

Meissner

Włodarczyk

et al. 2015

Ibis

Self Cite

View full text Add to dashboard Cite

Migration is an energetically expensive and hazardous stage of the annual cycle of non‐resident avian species, and requires certain morphological adaptations. Wing shape is one of the morphological traits that is expected to be evolutionarily shaped by migration. Aerodynamic theory predicts that long‐distance migrants should have more pointed wings with distal primaries relatively longer than proximal primaries, an arrangement that minimizes induced drag and wing inertia, but this prediction has mostly been tested in passerine species. We applied the comparative method of phylogenetically independent contrasts to assess convergent evolution between wing shape and migration within shorebirds. We confirmed the assumption that long‐distance migrants have less rounded wings than species migrating shorter distances. Furthermore, wing roundedness negatively correlates with fat load and mean distance of migratory flights, the basic components of migration strategies. After controlling for interspecific differences in body size, we found no support for a link between wing length and migration, indicating that wing shape is a more important predictor of shorebird migratory behaviour than wing length. The results suggest that total migration distance and migratory strategy may simultaneously act on the evolution of wing shape in shorebirds, and possibly in other avian species.

show abstract

“…Minias et al . ). For Ruff Philomachus pugnax , a highly size‐dimorphic species with males much larger than females, regression equations were calculated separately for each sex.…”

Section: Methodsmentioning

confidence: 97%

Wing shape and migration in shorebirds: a comparative study

Minias

Meissner

Włodarczyk

et al. 2015

Ibis

Self Cite

View full text Add to dashboard Cite

show abstract

“…Klaassen 1995;Guillemette et al 2007), the process of moult in the Common Snipe has been shown to be energetically costly. Young snipe were found to have lost more than 50% of their fat reserves during the postjuvenile moult (Minias et al 2010b), and depletion of endogenous fat was accompanied by a significant decrease in plasma concentrations of triglycerides during the advanced stage of moult (Podlaszczuk et al 2017). However, it remains unknown whether overlapping costs of moult and migration produce elevated levels of organismal stress in species such as the Common Snipe.…”

Section: Introductionmentioning

confidence: 99%

Leukocyte profiles indicate nutritional, but not moulting stress in a migratory shorebird, the Common Snipe (Gallinago gallinago)

et al. 2017

Self Cite

View full text Add to dashboard Cite

The relative ratio of the two main leukocyte types, heterophils (H) and lymphocytes (L), is known to change proportionally to the concentrations of stress hormones in the circulating blood. Thus, analysis of leukocyte profiles serves as a reliable proxy of stress in vertebrates, as high H/L ratios indicate stronger stress response. Moult and migration are among the most energetically demanding and nutritionally stressful processes in the annual cycle of wild birds. Although most birds separate these two activities in time, a moult-migration overlap has been reported for several avian species. The aim of this study was to examine whether overlapping energy requirements of moult and migration produce an increased organismal stress in a shorebird species, the Common Snipe (Gallinago gallinago). For this purpose, we assessed leukocyte profiles and nutritional condition in more than 350 moulting and non-moulting snipe during autumn migration through central Europe. We found negative correlations between H/L ratios and different measures of condition, including size-corrected body mass, fat load, and plasma concentrations of triglycerides and total protein. However, no evidence was found for the effect of moult status on H/L ratios. Our study indicates that while migration in a poor nutritional state can be associated with elevated stress response, the process of feather replacement may not constitute a serious stress for migrating Common Snipe. We suggest that these results may help to explain the occurrence of moult-migration overlap in the Common Snipe and possibly in other avian species.

show abstract

“…A fraction of completely moulted first-year snipes did not exceed 10% of all caught birds at the end of September (unpublished data). Contrastingly, as much as 52% of first-year birds did not yet begin post-juvenile moult at this time of year (MINIAS et al 2010).…”

mentioning

confidence: 83%

“…In waders, length of migration is known to be one of the main determinants of moult onset (HOLMES 1971 (HOLMES 1966;BENGTSON 1970;SUMMERS et al 2004;SERRA et al 2006). At Jeziorsko reservoir first-year snipes which started moult in body feathers were recorded since the middle of July, whereas intensively moulting birds appeared at the beginning of August (MINIAS et al 2010). A fraction of completely moulted first-year snipes did not exceed 10% of all caught birds at the end of September (unpublished data).…”

mentioning

confidence: 94%

Pattern of Post-Juvenile Moult in Common Snipe (Gallinago Gallinago) and Its Implications for Ageing of the Species

et al. 2010

Self Cite

View full text Add to dashboard Cite

External ageing of Common Snipe (Gallinago gallinago) still engenders considerable problems. To improve precision of age determination on the basis of plumage characteristics a scheme of post-juvenile moult was investigated in approximately 1200 first-year Common Snipes caught during autumn migration in central Poland. Post-juvenile moult was commenced from body feathers followed by moult of rectrices, lesser/median wing coverts and tertials. Moult sequence showed high inter-individual variability and was started in rectrices (36.9%), wing coverts (25.3%), tertials (8.4%) or simultaneously in several of these tracts of feathers (29.4%). Moult of rectrices was finished before completion of moult of wing coverts and tertials. Moult of tertials finished as the last from all age-indicative tracts of feathers. Consequently, tertials were suggested as the most useful for ageing of first-year Common Snipes in an advanced stage of moult. There was no case of moult of the outermost tertial in first-year birds. The second tertial from distal side of wing was moulted as the last one within this tract of feathers and thereby should be of special interest during plumage examination.

show abstract

Adjustments and Exploitation of Body Stores During Post-Juvenile Molt in Common SnipeGallinago gallinago

Cited by 10 publications

References 14 publications

Wing shape and migration in shorebirds: a comparative study

Wing shape and migration in shorebirds: a comparative study

Leukocyte profiles indicate nutritional, but not moulting stress in a migratory shorebird, the Common Snipe (Gallinago gallinago)

Pattern of Post-Juvenile Moult in Common Snipe (Gallinago Gallinago) and Its Implications for Ageing of the Species

Contact Info

Product

Resources

About