The morphometric analysis of Eurasian coot eggs (Fulica atra) under the local conditions from Câmpenești, North-Western Romania
===SHORT COMMUNICATION===
DOI:
https://doi.org/10.24193/subbbiol.2021.1.04Keywords:
egg length, egg breadth, egg volume, intraspecific variation,Abstract
The aim of the present paper was to analyze the measurements of the Eurasian Coot (Fulica atra) eggs in order to evaluate if the local conditions, presented here, differ in some way from older data found in references dating to 1955 in Romania. The data were collected from the Eurasian Coot nests identified (N=8) at Câmpenești fishponds, located in North-Western Romania, in May 2018. The clutch size was 7.5 ±1.6, ranging from 5 to 10 eggs. The mean egg length was 50.81 mm, and the mean egg breadth was 34.5 mm with higher variability in case of the first measurement. The mean egg volume was 31.3 cm3 which is much smaller than reported in the Romanian references (36.13 cm3). Regarding intra-clutch variance, we found that some clutches manifest a higher length, breadth and volume variance than others which can be a result of the intraspecific nest parasitism or environmental variances. The results brought some extensions of egg length and egg breadth limits and also may reflect a decrease in egg size over time.
Article history: Received 17 April 2020; Revised 27 November 2020; Accepted 29 April 2021; Available online 30 June 2021.
References
Blackburn, T. M. (1991). An intraspecific relationship between egg size and clutch size in birds. Auk, 108: 209-211.
Cheng, K., Cheng, Z., Cai, T., & Ha., L. (2016). The effectiveness of egg morphology for detecting parasitized nests and eggs for common coots (Fulica atra) in Heilongjiang, China. Waterbirds, 39(3):306-311.
Christians, J., K. (2002). Avian egg size: variation within species and inflexibility within individuals Biol. Rev 77: 1–26
Cramp, S., & Simmons, K. E. L. (1980). The Birds of the Western Palearctic, Vol. 2. Oxford University Press, Oxford.
Custer, T. W., & Frederick, P. C. (1990). Egg size and laying order of Snowy Egrets, Great Egrets and Black-crowned Night-herons, The Condor, 92: 772-775.
David, A., Stermin, A. N., & Sevianu, E. (2018). Clutch size and egg repetability in three elusive bird species: Little Bittern (Ixobrychus minutus), Little Crake (Zapornia parva) and Water Rail (Rallus aquaticus) from north-west Romanian populations, Studia Universitatis Babeș-Bolyai Biologia, 63, 1, 81-88.
Figuerola, J., & Green A. (2005). A comparative study of egg mass and clutch size in the Anseriformes. J. Oenithol. 147: 57–68.
Glutz U. N., Bauer K., & Bezzel E. (1981). Handbuch der Vögel Mitteleuropas. Wiesbaden B.5: 688.
Gregory, R. D., Gibbons, D. W., & Donald, P. F. (2004). Bird census and survey techniques 1: 38-40 DOI: 10.1093/acprof:oso/9780198520863.003.0002
Hoyt, F. D. (1978). Practical methods of estimating volume and fresh weight of bird eggs. The Auk 96:73-77.
Kiss, V. A., & Pripon L. R. (2019a). Differences regarding habitat preferences of the Eurasian Coot (Fulica atra Linnaeus 1758) in the breeding and non-breeding season in local conditions of Câmpenești (Cluj, Transylvania), Conference paper: 12th congress of the European Ornithologists’ Union - Cluj-Napoca.
Kiss, V. A., & Pripon, L. R. (2019b). A reevaluation of the avifauna from Câmpenești fishing complex (Cluj County – Romania) in the context of high human impact, Brukenthal Acta Musei XIV 3, 657-672.
Linția, D. (1955). Păsările din R.P.R. vol. III. Editura Academiei Republicii Populare Române, București.
Mitrus, C., & Rogala, B. (2001). Egg size variation in the Collared Flycatcher Ficedula albicollis in the Bialowieza Forest (NE Poland). Acta Ornithologica 36: 7-12.
Nieoczym, M., & Kloskowski, J. (2018). Habitat selection and reproductive succes of coot Fulica atra on ponds under different fish size and density conditions. Hydrobiologia 820: 267–279
Polak, M. (2010). Clutch and egg size variation in the coot Fulica atra breeding on fishponds in eastern Poland – test of the optimal egg dimensions hypothesis, Acta zoologica cracoviensia, 53A (1-2): 35-40.
Profus, P., Tryjanowski, P., Tworek, S., & Zduniak, P. (2004). Intrapopulation variation of egg size in the White Stork (Ciconia ciconia) in southern Poland, Polish Journal of Ecology, 52: 75-78.
Salathé, T. (1986). Habitat Use by Coots Nesting in a Mediterranean Wetland. Wildfowl 37: 136–171.
Samraoui, F., & Samraoui, B. (2007). The reproductive ecology of the Common Coot (Fulica atra) in the Hauts Plateux, Northeast Algeria, Waterbirds 30(1): 133-139.
Uzun, A., Uzun B., & Kopij G. (2010). The Effect of Clutch Size on Egg and Hatchling Mass and Measurements in the Common Coot Fulica atra, Ekoloji 19, 74:160-163.
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