Morphometrics of the Chinese grouse Bonasa sewerzowi |
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| Authors: | Yue-Hua Sun Yun Fang Jon E Swenson Siegfried Klaus and Guang-Mei Zheng |
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| Institution: | (1) College of Biological Sciences, Beijing Normal University, 100875 Beijing, People s Republic of China;(2) Institute of Zoology, Chinese Academy of Sciences, 100080 Beijing, Peoples Republic of China;(3) Department of Ecology and Natural Resource Management, Agricultural University of Norway, Box 5003, 1432 Ås, Norway;(4) Norwegian Institute for Nature ResearchNorwegian Institute for Nature Research, Tungasletta 2, 7485 Trondheim, Norway;(5) Thüringer Landesanstalt für Umwelt und Geologie, Prüssingstrasse 25, 07749 Jena, Germany |
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| Abstract: | We report on the body size and mass and egg size and mass of the Chinese grouse (Bonasa sewerzowi), one of the least known grouse in the world. Although reported to be the smallest grouse in the world, not enough data have been available to substantiate this claim. We document that the Chinese grouse is, in fact, the smallest grouse in the world. It shows significant changes in body mass between the reproductive and nonreproductive season (males average 310 g in the reproductive season and 341 g in the nonreproductive season; females averaged 338 and 315 g, respectively). Egg mass averages 20.6–21.6 g and shows significant annual variation. The Chinese grouse shows some of the highest relative reproductive investment among grouse, both for egg mass (6.1–6.9% of female body mass) and clutch mass (38–43%). |
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| Keywords: | Allometrics Body size Bonasa sewerzowi Egg mass Reproductive investment |
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