Feeding and Metabolism

Lucas, J. S. (2008). Feeding and Metabolism. In Paul C. Southgate and John S. Lucas (Ed.), The Pearl Oyster (pp. 103-130) Oxford UK: Elsevier Press. doi:10.1016/B978-0-444-52976-3.00004-8


Author Lucas, J. S.
Title of chapter Feeding and Metabolism
Title of book The Pearl Oyster
Place of Publication Oxford UK
Publisher Elsevier Press
Publication Year 2008
Sub-type Research book chapter (original research)
DOI 10.1016/B978-0-444-52976-3.00004-8
Open Access Status
ISBN 9780444529763
0444529764
Editor Paul C. Southgate
John S. Lucas
Chapter number 4
Start page 103
End page 130
Total pages 28
Total chapters 16
Language eng
Subjects B1
070401 Aquaculture
Abstract/Summary Pearl oysters are typical bivalve molluscs in the general morphology and functioning of their feeding, ingestion, digestion, defecation, and excretion. Like most other bivalve molluscs, pearl oysters are filter or suspension feeders throughout the free-living stages of their lifecycle. They filter fine suspended particles, seston, from the water around them. There are often significant amounts of dissolved organic matter (DOM) in seawater and this is another potential source of nutrients for pearl oysters. There are several factors that affect their ability to capture these particles and the nutritional value of the particles, that is, whether they are organic or inorganic, their abundance, size, shape, surface characteristics, density, digestibility, and biochemical composition. The energy-yielding oxidative processes of metabolism are usually aerobic in pearl oysters, although anaerobic metabolism may occur in some circumstances. Oxygen for aerobic metabolism is extracted from the water fl owing through the mantle cavity and CO is discharged. The gill filaments contain hollow tubes through which hemolymph flows and deoxygenated hemolymph thereby comes into close proximity with the seawater flowing over the filaments. There is reciprocal exchange of O and CO as they diffuse passively across the fine filament membranes according to the gradients between seawater and hemolymph.
Q-Index Code B1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Thu, 16 Apr 2009, 01:20:34 EST by Peter Fogarty on behalf of Faculty of Science