Body Condition and Fat Score in Local and Passage Populations of the Great Reed Warbler (Acrocephalus arundinaceus) During the Spring Migration in NE Bulgaria
The fat level and the body mass of local Great Reed Warblers in the Kalimok Field Station, NE Bulgaria (41°00'N, 26°26'E) were compared with those of passing birds. During the springs of 1998-2004, 591 individuals of this species were mist-netted and handled according to the guidelines in the Manual of Field Methods (ESF project) and to the South-East European Bird Migration Network (SEEN) standards. As local birds we identified 60 individuals caught at least twice in different seasons. The means of the fat score and the body mass calculated for the local birds and for the passing Great Reed Warblers were similar. Also, the time of the local birds arrival and the passage of the species in the region studied coincided. Therefore, we suggest that the southern and northern populations have equal potentials for realization of their migratory state and birds from southern populations could spread in spring to the north, being an important interregional gene flow in Great Reed Warblers.
If the inline PDF is not rendering correctly, you can download the PDF file here.
Bairlein F. 1995. Manual of field methods. European-African Songbird Migration Network Institut für Vogelforschung Wilhelmshaven.
Berthold P. 1975. Migration: control and metabolic physiology. In: Franes D.S. King J.R. (Eds). Avian biology. vol. 5. Acad. Press London.: pp. 77-128.
Berthold P. 2001. Bird migration: A general survey. Oxford Univ. Press Oxford.
Blem C.R. 1990. Avian energy storage. Current Ornithol. 7: 59-113.
Blyumenthal T. 1971. [The development of the autumnal migratory state in some wild passerine birds: bioenergetic aspect.] In: Bykhovsky B.E. (Ed.). [Ecological and physiological aspects of bird migration.] Nauka Press Leningrad: pp. 111-182. (In Russian).
Busse P. 1970. Measurements of weight and fatness in migrating populations of birds. Not. Orn. 11 1-4: 1-15.
Busse P. 1976. The spring migration of birds at the east part of Polish Baltic coast. Acta zool. crac. 21 6: 121-261.
Busse P. 2000. Bird station manual. SEEN University of Gdańsk Gdańsk.
Chernetsov N. 1999. Timing of spring migration body condition and fat score in local and passage populations of the Reed Warbler Acrocephalus scirpaceus on the Courish Spit. Avian Ecol. Behav. 2: 75-88.
Dolnik V.R. 1975. [Migratory disposition in birds.] Nauka Moscow. (In Russian).
Franson T. Jakobsson S. 1998. Fat storage in male Willow Warblers in spring: Do residence arrive lean or fat? Auk 115: 759-763.
Fransson T. Jakobsson S. Johansson P. Kullberg C. Lind J. Vallin A. 2001. Magnetic cues trigger extensive refuelling. Nature 414: 35.
Hansson B. Bensch S. Hasselquist D. 2003. A new approach to study dispersal: immigration of novel alleles reveals female biased dispersal in great reed warblers. Mol. Ecol. 3: 631-637.
Hansson B. Bensch S. Hasselquist D. 2004. Lifetime fitness of short- and long-distance dispersing great reed warblers. Evol. Int. J. Org. Evol. 11: 2546-2557.
Kaiser A. 1993. A new multi-category classification of subcutaneous fat deposits of songbirds. J. Field Ornithol. 64: 246-255.
Lapshin N.V. 1978. [Peculiarities of spring migration of Willow Warblers in north-western Russia.] Absr. II All-Union Conf. Bird Migration. part 2. Alma-Ata: 85-86 (In Russian).
Potti J. 1998. Arrival time from spring migration in male pied flycatchers: individual consistency and familial resemblance. Condor 100 702-708.
Sandberg R. 1996. Fat reserves of migrating passerines at arrival on the breeding grounds in Swedish Lapland. Ibis 138: 514-524.
Schaub M. Jenni. L. 2000. Fuel deposition of three passerine bird species along the migration route. Oecologia 122: 306-317.
Wiltschko R. Wiltschko W. 1978. Relative importance of stars and the magnetic field for the accuracy of orientation in night-migrating birds. Oikos 30: 195-206.
Wiltschko W. Wiltschko R. 1998. The navigation system of birds and its development. In: Balda R.P. Pepperberg I.M. Kamil A.C. Animal Cognition in Nature. Acad. Press San Diego: pp. 155-199.