Ontogenetic changes in the live weight of Saker falcon (Falco cherrug) chicks during the artificial feeding from hatching to transferring


live weight
postnatal ontogenesis
artificial breeding

How to Cite

Snigirev, S. I., & Mendel, L. B. (2022). Ontogenetic changes in the live weight of Saker falcon (Falco cherrug) chicks during the artificial feeding from hatching to transferring. Acta Biologica Sibirica, 8, 871–878. https://doi.org/10.5281/zenodo.7686849


The dynamics of changes in the live weight of saker falcon (Falco cherrug) chicks in the early postnatal period and the comparison of the growth energy of chicks of different morphometric groups during artificial feeding from hatching to transferring were investigated. The average period of minimum live weight gain in saker falcon chicks was 144–192 hours. The chicks with a smaller initial weight compensated it with higher growth energy on days 6–7 compared to the larger chicks.



Armstrong D, Seddon P (2008) Directions in reintroduction biology. Trends in Ecology & Evolution 23 (1): 20-25. https://doi.org/10.1016/j.tree.2007.10.003

Baumgart W (1991) Der Sakerfalke. Die Neue Brehm-Bucherei. Band 514. A. Ziemsen Verlag, Wittenberg Lutherstadt, 160 pp.

Cade T, Enderson J, Thelander C, White C (Eds) (1988) Peregrine falcon populations, their management and recovery. The Peregrine Fund, Inc, Boise, ID USA.

Dixon A, Ragyov D, Acebes D, Rahman L, Klisurov I (2020) Movement and survival of captive-bred Saker Falcons, Falco cherrug, released by wild hacking: implications for reintroduction management. Acta Ornithologica 54 (2): 157–170. https://doi.org/10.3161/00016454AO2019.54.2.003

Dzialak MR, Lacki MJ, Vorisek S (2007) Survival, mortality, and morbidity among Peregrine Falcons reintroduced in Kentucky. Journal of Raptor Research 41 (1): 61–65. https://doi.org/10.3356/0892-1016(2007)41[61:SMAMAP]2.0.CO;2

Gál J, Bagyura J, Attila B, Marosan M, Irhzi Z, Kardos K, Radvnyi S (2007) Examination of eggs recovered from Hungarian Saker Falcon (Falco cherrug) nests. Magyar Allatorvosok Lapja 129 (6): 371–375.

Iankov P, Gradinarov D (2012) Conservation strategy of the Saker Falcon (Falco cherrug) in Bulgaria. Aquila 119: 31-45.

Knaus P, Antoniazza S, Wechsler S, Guélat J, Kéry M, Strebel N, Sattler T (2018) Swiss Breeding Bird Atlas 2013–2016. Distribution and population trends of birds in Reintroduction of the Saker Falcon (Falco cherrug) in Bulgaria, Switzerland and Liechtenstein. Swiss Ornithological Institute, Sempach.

Kovács A, Williams NP, Galbraith CA (2014) Saker Falcon, Falco cherrug, Global Action Plan (SakerGAP). CMS Raptors MOU Technical Publication No. 2. CMS Technical Series No. 31. Coordinating Unit of the Raptors MOU, Abu Dhabi.

Krist M (2011) Egg size and offspring quality: a meta-analysis in birds. Biological Reviews 86: 692–716. https://doi.org/10.1111/j.1469-185X.2010.00166.x

Lazarova I, Petrov R, Andonova Y, Klisurov I, Dixon A (2021) Reintroduction of the Saker Falcon (Falco cherrug) in Bulgaria – preliminary results from the ongoing establishment phase by 2020. Biodiversity Data Journal 9: e63729. https://doi.org/10.3897/BDJ.9.e63729

Lindberg P, Sjoberg U (2009) Captive breeding and restocking of the Peregrine Falcon in Sweden. In: Sielicki J, Mizera T (Eds) Peregrine Falcon populations: status and perspectives in the 21st century. Turul Publishing & Poznan University of Life Sciences Press, Warsaw-Poznan.

Medammal Z, Azeez PA (2013) Food Consumption and Pellet Regurgitation Rates in Captive Breeding Falcon Peregrine Falcon Falco peregrinus and Saker Falcon Falco cherrug. Scientia 9 (1): 183–189.

Orta J, Boesman P, Sharpe CJ, Marks JS (2020) Saker Falcon (Falco cherrug). In: del Hoyo J, Elliott A, Sargatal J, Christie DA, de Juana E (Eds). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona.

Ragyov D, Shishkova V (2006) Saker Falcon in Bulgaria: past, present and future. Falco 27: 4–8.

Ragyov D, Kmetova E, Dixon A, Franz K, Koshev Y, Nedialkov N (2009) Saker Falcon, Falco cherrug, reintroduction in Bulgaria: Feasibility study. SESN, Sofia.

Ragyov D, Dixon A, Kowalczyk K (2010) Reintroduction of the saker falcon to Bulgaria, South-East Europe. In: Soorae PS (Ed.) Global reintroduction perspectives: additional case studies from around the globe. IUCN/SSC Reintroduction Specialist Group, Abu Dhabi, UAE.

Ragyov D, Koshev Y, Kmetova E, Gradev G, Stoyanov G, Stoev I, Marinov D (2012) Preparatory activities for Saker Falcon (Falco cherrug) reintroduction in Bulgaria: habitat management and electrocution risk assessment. Aquila 119: 91–103.

Sielicki S, Sielicki J (2009) Restoration of Peregrine Falcon in Poland 1989-2007. In: Sielicki J, Mizera T (Eds) Peregrine Falcon populations – status and perspectives in the 21st century. Turul/ Poznań University of Life Sciences Press, Warsaw – Poznań, 699–722 p.

Watson M, Clarke R (2000) Saker Falcon diet: the implications of habitat change: British Birds 93 (3): 136–143.

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