Body condition of long-distance migrant birds from the Eastern Baltic before and after a population decline

V.A. Payevsky

Proceedings of the Zoological Institute RAS, 2021, 325(3): 339–347 · https://doi.org/10.31610/trudyzin/2021.325.3.339

Full text

Abstract

According to standardized bird trapping for banding purposes the population trends of Wrynecks (Jynx torquilla Linnaeus, 1758), Lesser Whitethroats (Sylvia curruca Linnaeus, 1758), Tree Pipits (Anthus trivialis Linnaeus, 1758), and Red-backed Shrikes (Lanius collurio Linnaeus, 1758) over 45 years in the Courish Spit, Eastern Baltic, indicate two periods, an initial population growth and a subsequent significant decline. All results, including the already published data on the Barred Warblers, indicate that 5 species of long-distance trans-Saharan migrants experienced a significant decline in numbers since the mid-1970s. Ringing protocol included determination of age and taking biometric measurements, the wing length as a proxy of structural size, and body mass. During the period of population decline, neither wing length, nor body mass of birds changed. None of the indicators of population productivity (clutch size, average brood size, breeding success) did not change, either. Presumably this may mean that the reasons for the population decline of the species are related to factors affecting birds on migration route or in wintering areas, and not on their breeding grounds. It is known that in catastrophic droughts on the African continent, the quality of habitats deteriorates, and competition for food leads to an increase in the mortality rate of wintering birds.

Key words

body condition, droughts in Africa, Lesser Whitethroat, population decline, Red-backed Shrike, Tree Pipit, Wryneck

Submitted May 11, 2021 · Accepted June 17, 2021 · Published September 25, 2021

References

Aloni I., Markman S. and Ziv Y. 2019. Autumn temperatures at African wintering grounds affect body condition of two passerine species during spring migration. PLoS ONE, 14(5): 1–15. https://doi.org/10.1371/journal.pone.0217619

Berryman A.A. 2004. Limiting factors and population regulation. Oikos, 105: 667–670. https://doi.org/10.1111/j.0030-1299.2004.13381.x

Berthold P. 1973. Über starken Rückgang der Dorngrasmücke und anderer Singvogelarten im westlichen Europa. Journal für Ornithologie, 114(3): 348–360. https://doi.org/10.1007/BF01640341

Berthold P., Fiedler W., Schlenker R. and Querner U. 1998. 25-year study of the population development of Central European songbirds: A general decline, most evident in long-distance migrants. Naturwisstnschaften, 85: 350–353. https://doi.org/10.1007/s001140050514

Berthold P., Fiedler W., Schlenker R. and Querne U. 1999. Bestandsveränderungen mitteleuropäischer Kleinvögel: Abschlußbericht zum MRI-Programm. Vogelwarte, 40: 1–10.

BirdLife International 2021. IUCN Red List for birds. Available from: http://www.birdlife.org (accessed 27 January 2021).

Bolshakov C.V., Shapoval A.P. and Zelenova N.P. 2001. Results of bird ringing by the Biological Station “Rybachy” on the Courish Spit: long-distance recoveries of birds ringed in 1956–1997. Part 1. Avian Ecology and Behaviour, Suppl. 1: 1–126.

Busse P. 1994. Population trends of some migrants at the southern Baltic coast – autumn catching results 1961–1990. The Ring, 16 (1–2): 1–115.

Busse P. 2018. Migration patterns of individual populations a key requirement in studies on climate-caused changes of migration strategy. Conference: A joint conference of the “Birds as Early Warning Systems” of the Poland–South Africa collaboration project, the Migrant Landbird Study Group, and the Polish Network of Bird Ringing Stations (KSSOP) Migrant birds as indicators of climate change (13–16 December, Gdansk). The Polish Network of Bird Ringing Stations (KSSOP), Gdansk, Poland. https://doi.org/10.13140/RG.2.2.23468.92804

Busse P., Baumanis J., Leivits A., Pakkala H., Payevsky V.A. and Ojanen M. 1995. Population number dynamics 1961–1990 of Sylvia species caught during autumn migration at some North and Central European bird stations. The Ring, 17: 12–30.

Busse P. and Cofta T. 1986. Population trends of migrants at the Polish Baltic coast and some new problems in the interpretation of migration counts. Vår Fågelvärld, Supplement, 11: 27–31. https://www.researchgate.net/publication/270276615

Calkins D.G., Becker E.F. and Pitcher K.W. 1998. Reduced body size of female Steller sea lions from a declining population in the Gulf of Alaska. Marine Mammal Science, 14: 232–244. https://doi.org/10.1111/j.1748-7692.1998.tb00713.x

Dolnik V.R. and Payevsky V.A. 1976. Rybachy trap. In: V.D. Ilyichev (Ed.). Ringing in the study of avian migration in the USSR. Nauka, Moscow: 73–81. [In Russian].

Dolnik V.R. and Payevsky V.A. 1980. Dynamics of numbers in Baltic bird populations in 1960–1976. Soviet Journal of Ecology, 10: 316–325.

Green R.E. 1999. Diagnosing the causes of bird population declines using comparative methods: The value of data from ringing. Ringing & Migration, 19 (Suppl. 1): 47–56. https://doi.org/10.1080/03078698.1999.9674211

Heldbjerg H. and Fox T. 2008. Long-term population declines in Danish trans-Saharan migrant birds. Bird Study, 55: 267–279. https://doi.org/10.1080/00063650809461532

Karlsson L., Ehnbom S., Persson K. and Walinder G. 2002. Changes in numbers of migrating birds at Falsterbo, South Sweden, during 1980–1999, as reflected by ringing totals. Ornis svecica, 12: 113–137.

Lack D. 1954. The natural regulation of animal numbers. Clarendon Press, Oxford, 343 p.

Lack D. 1966. Population studies of birds. Clarendon Press, Oxford, 343 p.

Laidre K.L., Estes J.A., Tinker M.T., Bodkin J., Monson D. and Schneider K. 2006. Patterns of growth and body condition in sea otters from the Aleutian archipelago before and after the recent population decline. Journal of Animal Ecology, 75: 978–989. https://doi.org/10.1111/j.1365-2656.2006.01117.x

Malchevsky A.S. and Pukinsky Y.B. 1983. Birds of the Leningrad region and adjacent territories. Vol. 1. Leningrad University Publishing House, Leningrad, 480 p. [In Russian].

Marchant J.H. 1992. Recent trends in breeding populations of some common trans-Saharan migrant birds in Northern Europe. Ibis, 134 (1): 113–119. https://doi.org/10.1111/j.1474-919X.1992.tb04741.x

Moritz D. 1993. Long-term monitoring of Palaearctic-African migrants at Helgoland/German Bight, North Sea. Annales of Royal Museum for Central Africa, 268: 579–586.

Newton I. 2003. Population regulation in birds: is there anything new since David Lack? Avian Science, 3(2–3): 75–84.

Newton I. 2004. Population limitation in migrants. Ibis, 146 (2):197–226. https://doi.org/10.1111/j.1474-919X.2004.00293.x

Newton I. 2006. Can conditions experienced during migration limit the population levels of birds? Journal of Ornithology, 147: 146–166. https://doi.org/10.1007/s10336-006-0058-4

Newton I. 2008. The Migration Ecology of Birds. Academic Press, London, 976 p.

Österlöf S. and Stolt B.O. 1982. Population trends indicated by birds ringed in Sweden. Ornis scandinavica, 13 (2): 135–140. https://doi.org/10.2307/3676200

Pavlova E.A. and Vysotsky V.G. 1989. A new data on the Murgab pheasant Phasianus colchicus principalis. Proceedings of the Zoological Institute of the Russian Academy of Sciences, 197: 98–104. [In Russian].

Payevsky V.A. 1973. Atlas of bird migration according to banding data at the Courland Spit. In: B.E. Bykhovskii (Ed.). Bird migration – ecological and physiological factors. Halstead Press of John Wiley and Sons, New York, 124 p.

Payevsky V.A. 1985. Avian demography. Nauka Press, Leningrad, 285 p. [In Russian].

Payevsky V.A. 1991. The extinct population of the Wryneck: its history and parameters. Materialy 10 Vsesojuznoy ornitologicheskoy konferentsii. Navuka i tekhnika, Minsk, 2: 132–134 [In Russian].

Payevsky V.A. 1999. Breeding biology, morphometrics, and population dynamics of Sylvia warblers in the Eastern Baltic. Avian Ecology and Behaviour, 2: 19–50.

Payevsky V.A. 2000. Rybachy-type trap. In: P. Busse (Ed.). Bird Station Manual. Gdan´sk University, Gdan´sk, 20–24.

Payevsky V.A. 2006. Mechanisms of population dynamics in trans-Saharan migrant birds: a review. Entomological Review, 86: S82–S94. https://doi.org/10.1134/S001387380610006X

Payevsky V.A. 2009. Songbird Demography. KMK Scientific Press, Moscow, 235 p.

Payevsky V.A., Vysotsky V.G. and Zelenova N.P. 2003. Extinction of a Barred Warbler Sylvia nisoria population: long-term monitoring, demography, and biometry. Avian Ecology and Behaviour, 11: 89–105.

Pettersson J. 1997. Fågelräkning vid Ottenby 1996. Degerhamn, Naturvårdsverket. 31 p.

Ryttman H. 2003. Breeding success of Wryneck Jynx torquilla during the last 40 years in Sweden. Ornis svecica, 13: 25–28.

Shapoval A.P. 1988. Some reproduction parameters of a declining population of Red-backed Shrike in the Courish Spit. Abstracts of 12th Baltic Ornithological Conference (15–18 November 1988, Palanga). Academy of Sciences of the Lithuanian SSR, Vilnius: 241–243. [In Russian].

Sokolov L.V. 1999. Population dynamics in 20 sedentary and migratory passerine species of the Courish Spit on the Baltic Sea. Avian Ecology and Behaviour, 3: 23–50.

Sokolov L.V., Yefremov V.D., Markovets M.Y., Shapoval A.P. and Shumakov M.E. 2000. Monitoring of numbers in passage populations of passerines over 42 years (1958–1999) on the Courish Spit of the Baltic Sea. Avian Ecology and Behaviour, 4: 31–53.

Sokolov L.V., Baumanis A., Leivits A., Poluda A.M., Yefremov V.D., Markovets M.Yu., Morozov Y.Yu. and Shapoval P.P. 2001. Comparative analysis of long-term monitoring data on numbers of passerines in nine European countries in the second half of the 20th century. Avian Ecology and Behaviour, 7: 41–74.

Svensson L. 1970. Identification Guide to European Passerines 1st edition. Naturhistoriska Riksmuseet, Stockholm, 152 p.

Svensson L. 1992. Identification Guide to European Passerines. 4th edition. Stockholm. Naturhistoriska Riksmuseet, Stockholm, 368 p.

Svensson S. 2000. Övervakning av fåglars population-sutveckling. Årsrapport för 1999. Ekologiska institutionen and Lunds universitet, Lund, 20 p.

Vickery J.A., Ewing S.R., Smith K.W., Pain D.J., Bairlein F., Škorpilová J. and Gregory R.D. 2014. The decline of Afro-Palaearctic migrants and an assessment of potential causes. Ibis, 156: 1–22. https://doi.org/10.1111/ibi.12118

Vinogradova N.V., Dolnik V.R., Yefremov V.D., and Payevsky V.A. 1976. Identification of Sex and age in passerine birds of the USSR. Nauka Press, Moscow, 192 p. [In Russian].