Fuel Supply and Metabolic Constraints in Migrating Birds

1998 ◽  
Vol 29 (4) ◽  
pp. 521 ◽  
Author(s):  
Lukas Jenni ◽  
Susanne Jenni-Eiermann
Keyword(s):  
Fuel Supply ◽  
Migrating Birds

Comparative Use of Riparian Corridors and Oases by Migrating Birds in Southeast Arizona

1998 ◽  
Vol 12 (4) ◽  
pp. 896-909 ◽  
Author(s):  
Susan K. Skagen ◽  
Cynthia P. Melcher ◽  
William H. Howe ◽  
Fritz L. Knopf
Keyword(s):  
Riparian Corridors ◽  
Migrating Birds

scholarly journals Improving the performance of tractor diesel engines by optimizing the fuel supply characteristics

2021 ◽  
Vol 677 (4) ◽  
pp. 042084
Author(s):  
A K Apazhev ◽  
Y A Shekikhachev ◽  
V I Batyrov ◽  
A L Bolotokov ◽  
L Z Shekikhacheva
Keyword(s):  
Diesel Engines ◽  
Fuel Supply ◽  
Tractor Diesel

scholarly journals Sex and age-specific differences in wing pointedness and wing length in blackcaps Sylvia atricapilla migrating through the southern Baltic coast

2020 ◽  
Author(s):  
Agnieszka Ożarowska ◽  
Grzegorz Zaniewicz ◽  
Włodzimierz Meissner
Keyword(s):  
Wing Length ◽  
Sub Saharan Africa ◽  
Migration Route ◽  
Sylvia Atricapilla ◽  
Climatic Effects ◽  
Migration Distance ◽  
Baltic Coast ◽  
Southern Baltic ◽  
Sub Saharan ◽  
Migrating Birds

Abstract The blackcap Sylvia atricapilla shows a complex migratory pattern and is a suitable species for the studies of morphological migratory syndrome, including adaptations of wing shape to different migratory performance. Obligate migrants of this species that breed in northern, central, and Eastern Europe differ by migration distance and some cover shorter distance to the wintering grounds in the southern part of Europe/North Africa or the British Isles, although others migrate to sub-Saharan Africa. Based on ˃40 years of ringing data on blackcaps captured during autumn migration in the Southern Baltic region, we studied age- and sex-related correlations in wing pointedness and wing length of obligate blackcap migrants to understand the differences in migratory behavior of this species. Even though the recoveries of blackcaps were scarce, we reported some evidence that individuals which differ in migration distance differed also in wing length. We found that wing pointedness significantly increased with an increasing wing length of migrating birds, and adults had longer and more pointed wings than juvenile birds. This indicates stronger antipredator adaptation in juvenile blackcaps than selection on flight efficiency, which is particularly important during migration. Moreover, we documented more pronounced differences in wing length between adult and juvenile males and females. Such differences in wing length may enhance a faster speed of adult male blackcaps along the spring migration route and may be adaptive when taking into account climatic effects, which favor earlier arrival from migration to the breeding grounds.

Sign in / Sign up

Export Citation Format

Share Document