Sex differences in the stopover ecology of Curlew Sandpipers<i>Calidris ferruginea</i>at a refuelling area during autumn migration

Figuerola, Jordi; Bertolero, Albert

doi:10.1080/00063659809461102

Cited by 9 publications

(5 citation statements)

References 18 publications

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“…Nevertheless, the starting date of northward migration estimated from the data collected on yellow‐dyed birds agrees with our counts indicating that most birds started to leave after 27 May. Moreover, our resighting rate of 23.8% in colour‐ringed birds is similar to that from other colour‐ringing studies estimating staging time in waders (Butler et al . 1987, Goede et al .…”

Section: Discussionsupporting

confidence: 91%

“…A relationship between body mass at catching and minimal staging time was found only in colour‐ringed birds from later catches (23–25 May). A correlation between body mass, body condition and stopover length is not regularly found (see Lyons & Haig 1995, Skagen & Knopf 1994, Iverson et al . 1996, Figuerola & Bertolero 1998, Warnock & Bishop 1998, Nebel et al .…”

Section: Discussionmentioning

confidence: 99%

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Fast fuelling but light flight in Broad‐billed Sandpipers Limicola falcinellus: stopover ecology at a final take‐off site in spring (Sivash, Ukraine)

Verkuil

Have

Winden

et al. 2006

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We studied phenology, staging time and refuelling in Broad-billed Sandpipers Limicola falcinellus stopping over during spring migration in the Sivash (Black Sea, Ukraine) in May 1991-94. In the study area, peak staging numbers of 2000-2500 individuals occurred in the third week of May. In May 1993, 460 birds were marked with a yellow dye and 126 of these were colour-ringed. Before 28 May no departure of birds dyed yellow could be detected; by 3 June all birds had departed. Colour-ringed adults in mid May 1993 staged for a minimum of 8.2 days. After the observed departure of large flocks (24 May and later) the staging time of colour-ringed birds decreased significantly with body mass at the time of capture. Of birds mist-netted in 1991-94, 99.3% were in full summer plumage and 89% were adults. In second-year birds, fuel deposition rate (measured between individuals) was 0.44 g/day. In adults caught from early May to 24 May, overall fuel deposition rate was 1.04 g/day (3.4% of lean body mass). Mean adult body mass in early May was 34.8 g, increasing to 45.5 g after 24 May. Estimated body mass at departure was 51 g. Departure body mass and flight range estimates suggest that although birds refuelled quickly, fuel loads are only just sufficient for an unbroken flight to Scandinavia and the Kola Peninsula. We suggest that Broad-billed Sandpipers use the Sivash as a crucial final take-off stopover site, and that they follow a 'jumping' migration strategy, performed under narrow time constraints.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Fast fuelling but light flight in Broad‐billed Sandpipers Limicola falcinellus: stopover ecology at a final take‐off site in spring (Sivash, Ukraine)

Verkuil

Have

Winden

et al. 2006

Ibis

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“…This could partially explain why most studies that have searched for a relationship between body condition and length of stay on staging grounds (which is an equivalent test to ours when birds are passing through a site; Lyons & Haig 1995, Iverson et al . 1996, Figuerola & Bortolero 1998, Warnock & Bishop 1998, Farmer & Wiens 1999) have failed to find a relationship, or found only a weak relationship.…”

Section: Discussionmentioning

confidence: 88%

Do body condition and plumage during fuelling predict northwards departure dates of Great Knots Calidris tenuirostris from north‐west Australia?

Battley

Piersma

Rogers

et al. 2003

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It is often assumed that strong selection pressures give rise to trade‐offs between body condition and time in long‐distance migrating birds. Birds that are ‘behind schedule’ in fuel deposition or moult should delay departure, and this should result in a negative correlation between initial condition and departure date. We tested this hypothesis in the Great Knot Calidris tenuirostris migrating from north‐west Australia to eastern Asia en route to Siberia. Great Knot gain mass and moult into breeding plumage before leaving northern Australia in late March and early April, and fly 5400–6000 km to eastern China and Korea. We radiotracked 27 individuals (17 males and ten females) to determine departure dates; 23 migrated and four remained in Australia. We characterized body condition at capture using body mass, predicted pectoral muscle mass (based on ultrasound estimates of the size of the pectoral muscles) and breeding plumage scores. Residual condition indices were uncorrelated, indicating that at the individual level, variation in one fuelling component was not strongly associated with variation in the other components. Birds that did not depart had lower residual body mass and breeding plumage indices than those that did migrate; these four birds may have been subadults. Neither sex, size nor the condition indices explained variation in departure date of migrants. Reasons for this are explored. Departure dates for northward migrating waders indicate that the migration window (span over which birds depart) decreases with proximity to the northern breeding grounds. We suggest that migration schedules become tighter as birds get nearer to the breeding grounds. Thus the lack of a relationship between condition and departure date in Great Knots may reflect the fact that the departure episode under study is the first one in sequence and is still 4–8 weeks before breeding.

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“…Variation in migration patterns by sex is mainly a result of the pressures posed by the relative roles of parental care, individual tolerance, and intrasexual competition [1]. Sex differences in migratory patterns in species with sexual size dimorphism (a phenotypic difference between males and females of a species [8]) may be more obvious because of their highly intersexual selection [9], intrasexual competition [10], environmental tolerance [11,12] or energy consumption [13][14][15] related to their body size [16].…”

Section: Introductionmentioning

confidence: 99%

Migration patterns and conservation status of Asian Great Bustard (Otis tarda dybowskii) in northeast Asia

et al. 2022

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BackgroundThe great bustard (Otis tarda) holds the distinction of the heaviest bird to undergo migration as well as the greatest degree of sexual size dimorphism among living birds. Though the migration of the species has been widely discussed in the literature, researchers know little about the migration patterns of the subspecies in Asia (Otis tarda dybowskii), especially the males. MethodsIn 2018 and 2019, we captured six O. t. dybowskii ( ve males and one female) at their breeding sites in eastern Mongolia and tagged them with GPS-GSM satellite transmitters. This constitutes the rst time that male great bustards of the eastern subspecies have been tracked. We combined the tracking data of our only female with other three females from central Mongolia, which was published in previous study for analysis. ResultsWe found notable differences between the sexes: 1) males started migration later but arrived early than females in the spring, but not in autumn; 2) males had 1/3 of the migration duration of females (16.44 ± 14.68 days vs. 49.34 ± 21.28 days); 3) males migrated about 1/2 the distance of females (945.13 ± 79.00 km vs. 1922.88 ± 87.08 km). Additionally, we found bustards exhibited high delity to their breeding, postbreeding and wintering sites. Indeed, most of the wintering sites found by GPS tracking in this study were also utilized 70 years earlier, according to previous work. For conservation, we found only 22.20% of GPS location xes of bustards were within protected areas and less than 5.0% for wintering sites and during migration. ConclusionsOur ndings suggest that the migration patterns of eastern great bustards are sex-speci c and more conservation effort is needed for the Asian populations of this threatened species.

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Sex differences in the stopover ecology of Curlew SandpipersCalidris ferrugineaat a refuelling area during autumn migration

Cited by 9 publications

References 18 publications

Fast fuelling but light flight in Broad‐billed Sandpipers Limicola falcinellus: stopover ecology at a final take‐off site in spring (Sivash, Ukraine)

Fast fuelling but light flight in Broad‐billed Sandpipers Limicola falcinellus: stopover ecology at a final take‐off site in spring (Sivash, Ukraine)

Do body condition and plumage during fuelling predict northwards departure dates of Great Knots Calidris tenuirostris from north‐west Australia?

Migration patterns and conservation status of Asian Great Bustard (Otis tarda dybowskii) in northeast Asia

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