Variation in Timing of the Siberian Knot<i>Calidris c. canutus</i>Autumn Migration in the Puck Bay Region (Southern Baltic)

Meissner, Włodzimierz

doi:10.3161/068.040.0205

Cited by 13 publications

(20 citation statements)

References 7 publications

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“…As a consequence, earlier arriving females can settle at the better sites, in our case site A (note though that sex-and age-related differences in arrival timing cannot explain the larger body sizes at A). In years of breeding failure, males migrate at the same time as females (Meissner 2005). Their earlier arrival might enable some males to upgrade to better sites, thus partially "compensating" for reproductive failure by subsequent survival benefits.…”

Section: Discussionmentioning

confidence: 99%

Small-scale demographic structure suggests preemptive behavior in a flocking shorebird

et al. 2012

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Small-scale demographic structure suggests preemptive behavior in a flocking shorebird Leyrer, Jutta; Lok, Tamar; Brugge, Maarten; Dekinga, Anne; Spaans, Bernard; van Gils, Jan A.; Sandercock, Brett K.; Piersma, Theunis Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum. Under the ideal-free distribution, omniscient individuals with similar habitat requirements that are free to move should be distributed such that no individual can improve fitness by changing sites; deviations would indicate trade-offs and constraints on ranging behavior. We studied site occupancy and annual survival in red knots Calidris c. canutus at their main wintering area Banc d'Arguin, Mauritania. We collected mark-resighting data at 2 high-tide roosts (A and B) that were only 3 km apart and within sight. Birds were faithful to their roosts and foraged in nearby intertidal areas, with no overlap between birds from A and B. Shellfish-rich seagrass beds were of greater abundance for birds roosting at A than at B. During 8 winters, we found different sex ratios (48% and 58% males at A and B, respectively) and different proportion of juveniles (22% and 45%) at the 2 roosts. Adult annual survival was higher at A (0.83 ± 0.01 standard error [SE]) than at B (0.81 ± 0.03). Though rare, between winter season movements were 3 times more frequent from B to A than vice versa, indicating that knots can assess the differences in site quality: birds behaved as if they were "ideal". As larger females and older birds occurred more at A, differences in competitive ability might maintain the site occupancy pattern. As females return from the high Arctic breeding grounds first, and adults return before juveniles, priority of occupancy may also play a role. Such an advantage of arriving earlier would represent a seasonal carryover effect.

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Section: Discussionmentioning

confidence: 99%

Small-scale demographic structure suggests preemptive behavior in a flocking shorebird

et al. 2012

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“…Alternatively, in seasons of high predation pressure, waders tend to nest early in the season, which reduces the risk of predation, and also provides the advantage of an increased opportunity for renesting (Smith et al 2010). Another factor influencing the timing of waders' departure towards the wintering areas is breeding success (Meissner 2005;Barshep et al 2012). In years when there has been no time for replacement of the clutch or when the predation pressure has been high, adult birds have been observed to depart relatively earlier on their autumn migration and to arrive earlier at stop-over sites (Blomqvist et al 2002;Meissner 2005).…”

Section: Introductionmentioning

confidence: 99%

“…Another factor influencing the timing of waders' departure towards the wintering areas is breeding success (Meissner 2005;Barshep et al 2012). In years when there has been no time for replacement of the clutch or when the predation pressure has been high, adult birds have been observed to depart relatively earlier on their autumn migration and to arrive earlier at stop-over sites (Blomqvist et al 2002;Meissner 2005). However, it remains unknown if high predation pressure, which is the main factor leading to low breeding success in Arctic waders (Underhill et al 1993), differentially affects adult birds and inexperienced immature birds breeding for the first time.…”

Section: Introductionmentioning

confidence: 99%

Immature dunlins Calidris alpina migrate towards wintering grounds later than adults in years of low breeding success

Meissner

2015

J Ornithol

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Ein neuer Befund ist, dass in Saisons mit insgesamt niedrigem Bruterfolg das Gegenteil der Fall war, d. h. immature Tiere zogen später als Altvögel und deutlich später als in anderen Saisons ab. Eine plausible Erklärung hierfür ist, dass immature Tiere aus Mangel an Erfahrung eher dazu neigen, nach Verlust des ersten Geleges erneut zu brüten, besonders wenn hohe Brutverluste der früher im Brutgebiet eintreffenden Altvögel die Konkurrenz im Brutgebiet verringern. In Jahren mit niedrigem Bruterfolg bestand jedoch kein Unterschied im mittleren Zugdatum zwischen immaturen Männchen und Weibchen, was darauf hindeutet, dass der Bruterfolg der immaturen Tiere sehr niedrig war, obwohl sie länger im Brutgebiet blieben.

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“…Juvenile Knots start to depart from the Taimyr Peninsula not earlier than at the end of the first August decade (Tomkovich and Soloviev 1996), so at the same time (or even a little bit later) when the first Knots in juvenile plumage were observed along the Polish coast (Gromadzka 1992, Meissner 2005. The distance between the Taimyr Peninsula and southern Baltic coast is about 4000 km.…”

Section: Phenologymentioning

confidence: 99%

“…Some juveniles however were observed earlier at the beginning of August (Gromadzka 1992;Meissner 1992Meissner , 2005.…”

Section: Phenologymentioning

confidence: 99%

Does the Nearctic Knot (Calidris canutus islandica) Appear in Poland?

Meissner

Gromadzka

2006

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Does the Nearctic Knot (Calidris canutus islandica) Appear in Poland? The probability of the Nearctic Knot occurrence in Poland is discussed. Occasional appearing of this subspecies in Poland seems to be probable. The Nearctic Knot may be represented by individuals observed in Poland during winter and early spring or occurring during autumn migration and then recorded on wintering grounds in western Europe, and also by juveniles appearing not numerously in the first half of August, hence earlier than the probable period of arriving juveniles of the Siberian subspecies Calidris canutus canutus at the Baltic.

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Variation in Timing of the Siberian KnotCalidris c. canutusAutumn Migration in the Puck Bay Region (Southern Baltic)

Cited by 13 publications

References 7 publications

Small-scale demographic structure suggests preemptive behavior in a flocking shorebird

Small-scale demographic structure suggests preemptive behavior in a flocking shorebird

Immature dunlins Calidris alpina migrate towards wintering grounds later than adults in years of low breeding success

Does the Nearctic Knot (Calidris canutus islandica) Appear in Poland?

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