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- Title
Physiological energetics of the protobranch bivalve Yoldia hyperborea in a cold ocean environment.
- Authors
Stead, Robert A.; Thompson, Raymond J.
- Abstract
Yoldia hyperborea is a deposit-feeding circumpolar protobranch that also inhabits muddy sediments of the cold water boreal system of Conception Bay, Newfoundland, Canada. Little is known about this species, despite its wide distribution and frequent high density in the benthos. The present work deals with oxygen consumption and ammonia excretion under cold ambient conditions. Y. hyperborea showed low basal metabolism [0.051 ml O2 h-1·(g dry weight)-1, T=-1°C] and low ammonia excretion rates [4.212 µg·NH4-N·h-1·(g dry weight)-1, T=-1°C]. Low metabolic activity could prove a useful strategy during periods of low food availability. In addition, Y. hyperborea was able to regulate its O2 consumption rate at very low pO2 levels, which may be advantageous for a species that may experience periods of hypoxia.
- Subjects
YOLDIA; NUCULANIDAE; BIVALVES; OXYGEN; NONMETALS; METABOLISM
- Publication
Polar Biology, 2003, Vol 26, Issue 2, p71
- ISSN
0722-4060
- Publication type
Article
- DOI
10.1007/s00300-002-0457-9