Body weights and fat deposition of Palaearctic passerine migrants in the central Sahara
- 167 Downloads
Data on body weight, fat score and length of stopover of Palaearctic passerine migrants trapped at two sites in the central Algerian Sahara in autumn 1983 are presented.
Birds found grounded in oases were in good condition. They were not critically short of fat reserves.
Some of the migrant species found there have probably terminated their migration whereas other species do only stopover for fattening and do in fact continue their migration if they have restored sufficient fat for a further flight.
The daily activity pattern of caged migrants depended on their fat reserves.
The available food supplies were high enough for fattening.
Unable to display preview. Download preview PDF.
- Alerstam Th (1972) Nocturnal bird migration in Skåne, Sweden, as recorded by radar in autumn 1971. Ornis Scand. 3:141–151Google Scholar
- Bairlein F (1983) Habitat selection and associations of species in European passerine birds during southward, postbreeding migrations. Ornis Scand. 14:239–245Google Scholar
- Bairlein F, Beck P, Feiler W, Querner U (1983) Autumn weights of some Palaearctic passerine migrants in the Sahara. Ibis 125:404–407Google Scholar
- Baldwin SP, Kendeigh SC (1938) Variations in the weight of birds. Auk 55:416–467Google Scholar
- Berthold P (1975) Migration: control and metabolic physiology. In: Farner DS, King JR (eds) Avian Biology, Vol. 5. Academic Press, London, New York, pp 77–128Google Scholar
- Bibby CJ, Green RE (1981) Autumn migration strategies of Reed and Sedge Warblers. Ornis Scand 12:1–12Google Scholar
- Bibby CJ, Green RE (1983) Food and fattening of migrating warblers in some French marshlands. Ringing & Migration 4:175–184Google Scholar
- Bruderer B (1977) Beitrag der Radar-Ornithologie zu Fragen der orientierung, der Zugphysiologie und der Umweltabhängigkeit des Vogelzuges. Vogelwarte 29, Suppl:83–91Google Scholar
- Bruderer B (1982) Do migrating birds fly along straight lines? In: Papi F, Wallraff HG (ed) Avian Navigation. Springer, Berlin, Heidelberg, pp 3–14Google Scholar
- Caldwell LD, Odum EP, Marshall SG (1963) Comparison of fat levels in migrating birds killed at a central Michigan and a Florida Gulf Coast television tower. Wilson Bull 75:428–434Google Scholar
- Cherry JD (1982) Fat deposition and length of stopover of migrant White-crowned Sparrows. Auk 99:725–732Google Scholar
- Connell CE, Odum EP, Kale H (1960) Fat-free weights of birds. Auk 77:1–9Google Scholar
- Emlen ST, Emlen JT (1966) A technique for recording migratory orientation of captive birds. Auk 83:361–367Google Scholar
- Finlayson JC (1981) Seasonal distribution, weights and fat of passerine migrants at Gibraltar. Ibis 123:88–95Google Scholar
- Fry CH, Ash JS, Ferguson-Lees IJ (1970) Spring weights of some palaearctic migrants at Lake Chad. Ibis 112:58–82Google Scholar
- Hails CJ (1979) A comparison of flight energetics in Hirundines and other birds. Comp. Biochem Physiol 63A:581–585Google Scholar
- Langslow DR (1976) Weights of Blackcap on migration. Ringing & Migration 1:78–91Google Scholar
- Moreau RE (1961) Problems of Mediterranean-Sahara migration. Ibis 103:373–421, 580–623Google Scholar
- Moreau RE (1972) The Palaearctic-African bird migration systems. Academic Press, London, New YorkGoogle Scholar
- Moreau RE, Dolp RM (1970) Fat, water, weights and wing-lengths of autumn migrants in transit on the northwest coast of Egypt. Ibis 112:209–228Google Scholar
- Mueller HC, Berger DD (1966) Analyses of weight and fat variations in transient Swainson's Thrushes. Bird Banding 37:83–111Google Scholar
- Rappole JH, Warner DW (1976) Relationships between behavior, physiology and weather in avian transients at a migration stopover site. Oecologia 26:193–212Google Scholar
- Robbins CT (1983) Wildlife feeding and nutrition. Academic Press, New York, LondonGoogle Scholar