Badge Size of Male Eurasian Tree Sparrows Passer montanus Correlates with Hematocrit During the Breeding Season

Shin Matsui; Satoe Kasahara; Takahiro Kato; Hiroe Izumi; Gen Morimoto; Keisuke Ueda; Osamu K. Mikami

doi:10.2326/osj.16.87

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Shin Matsui,^1,*,** Satoe Kasahara,¹ Takahiro Kato,¹ Hiroe Izumi,² Gen Morimoto,^1,3,4 Keisuke Ueda,¹ Osamu K. Mikami⁵

¹1 Laboratory of Animal Ecology, Department of Life Sciences, Rikkyo University, 3–34–1 Nishi-Ikebuku
²2 Division of Biology, Department of Science, Hokkaido University, Kita 10, Nishi 8, Kita-ku, Sappor
³3 Tokyo-bay ecosystem research center, Department of Life Sciences, Toho University, 2–2–1 Funabashi
⁴4 The Yamashina Institute for Ornithology, Konoyama 115, Abiko, Chiba pref. Japan
⁵5 Department of Humanities and Regional Science, Hokkaido University of Education, 5–3–1 Ainosato, K

^* Corresponding author, E-mail: matsuishin@hotmail.com
^** Present address: Hokkaido Seabird Center, Kita 6–jo 1–chome, Tomamae-gun, Hokkaido 078–4116, Japan

Abstract

We investigated whether the badge size of the Eurasian Tree Sparrow Passer montanus is correlated with morphological traits and hematocrit during the breeding season in order to elucidate the function of badge size as a potential signal of body size and physiological condition. We found a positive correlation in males between badge size and hematocrit, but not in females. As individuals with larger hematocrit values can transport more oxygen to their tissues or organs, male badge size may be linked with oxygen transport ability. We suggest that male badge size may be a signal of physiological status.

Citation Download Citation

Shin Matsui, Satoe Kasahara, Takahiro Kato, Hiroe Izumi, Gen Morimoto, Keisuke Ueda, and Osamu K. Mikami "Badge Size of Male Eurasian Tree Sparrows Passer montanus Correlates with Hematocrit During the Breeding Season," Ornithological Science 16(1), 87-91, (1 January 2017). https://doi.org/10.2326/osj.16.87

Received: 28 November 2015; Accepted: 1 July 2016; Published: 1 January 2017

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