Vol. 58, 2019
(update: 2019.04.25; 05.22)
and Biochemical Thermoregulatory Responses in Male Chinese Hwameis to
Seasonal Acclimatization: Phenotypic Flexibility in a Small Passerine
Wang1,§, Shuangshuang Shan1,§, Haodi Zhang1,
Beibei Dong1, Weihong Zheng1,2, and Jinsong Liu1,2,*
of Life and Environmental Sciences, Wenzhou University, Wenzhou 325035,
China. *Correspondence: E-mail: firstname.lastname@example.org (Liu)
2Zhejiang Provincial Key Lab for Subtropical Water
Environment and Marine Biological Resources Protection, Wenzhou 325035,
§YW and SS contributed
equally to this work
Received 23 October 2018 / Accepted 24 March 2019
Communicated by Shou-Hsien Li
small birds living in regions with seasonal fluctuations and ambient
temperatures typically respond to cold by increasing metabolic
thermogenesis, internal organ mass and the oxidative capacity of
certain tissues. In this study, we investigated seasonal adjustments in
body mass, resting metabolic rate (RMR), evaporative water loss (EWL),
the mass of selected internal organs, and two indicators of cellular
aerobic respiration (mitochondrial state-4 respiration and cytochrome c oxidase activity) in Chinese
hwamei (Garrulax canorus)
that had been captured in summer or winter, from Wenzhou, China.
RMR and EWL were higher in winter than in summer. State-4 respiration
in the heart, liver, kidneys and pectoral muscle, as well as cytochrome
c oxidase activity in the liver, kidneys and pectoral muscle were also
higher in winter than summer. In addition, there was a positive
correlation between RMR and EWL, and between RMR and indicators of
cellular metabolic activity in the heart, liver, kidneys and pectoral
muscle. This phenotypic flexibility in physiological and biochemical
thermoregulatory responses may be important to the hwamei’s ability to
survive the unpredictable, periodic, cold temperatures commonly
experienced in Wenzhou in winter.
Key words: Chinese hwamei (Garrulax canorus), Cytochrome c oxidase, Evaporative water loss,
Organ mass, Resting metabolic rate, State-4 respiration.
Wang Y, Shan S, Zhang H, Dong B, Zheng W, Liu J. 2019. Physiological
and biochemical thermoregulatory responses in male Chinese hwameis to
seasonal acclimatization: phenotypic flexibility in a small passerine.
Zool Stud 58:6.