Respiration rates of the Japanese pearl oyster, Pinctada fucata martensii, feeding on Pavlova lutheri and Chaetoceros gracilis |
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| Authors: | Yuji Tomaru Sachi Ebisuzaki Zen'ichiro Kawabata & Shin&#;ichi Nakano |
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| Institution: | Department of Environmental Conservation, Faculty of Agriculture, Ehime University, Tarumi 3–5–7, Matsuyama 790–8566, Ehime, Japan; Centre for Ecological Research, Kyoto University, Otsuka 509–3, Kamitanakami‐Hirano‐cho, Otsu 520–2113, Shiga, Japan; Centre for Coastal Environmental Science Research, Ehime University, Tarumi 3–5–7, Matsuyama 790–8566, Ehime, Japan |
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| Abstract: | We examined the relationship between algal food (Chaetoceros gracilis and Pavlova lutheri) density and the respiration rate of Japanese pearl oysters, Pinctada fucata martensii. The respiration rate increased consistently with food density, independent of algal species. However, the respiration rate decreased at food densities >107 µm3 mL?1, suggesting inactivation of the digestion system by the high‐food density. Our results suggested that eutrophicated or turbid environments may be unfavourable to the growth of P. fucata martensii. |
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| Keywords: | food concentration respiration pearl oyster |
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