期刊
JOURNAL OF EXPERIMENTAL MARINE BIOLOGY AND ECOLOGY
卷 326, 期 2, 页码 144-156出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jembe.2005.05.014
关键词
Adamussium colbecki; food availability; Laternula elliptica; nucleic acid ratios; primary productivity; RNA
Growth of Antarctic benthic organisms is very slow due to temperature and food availability, and subtle differences in growth rate may be difficult to detect. Nucleic acid ratios (RNA/DNA, RNA/protein or total RNA concentration) are measures of protein synthesis potential and may be used to assess short-term growth rate in a range of marine organisms. We quantified nucleic acid ratios in the scallop Adamussium colbecki and the clam Laternula elliptica at five locations in the Ross Sea, Antarctica. We were able to detect species-specific, habitat-specific, and seasonal differences in nucleic acid ratios and related these to associated differences in primary productivity. By using nucleic acid ratios, future studies could relatively easily obtain a measure of growth rate from a multitude of locations with contrasting habitat characteristics, food availability and temperature regimes around the Antarctic continent. This would yield a unique understanding of spatial and temporal patterns in bivalve growth in this extreme environment. (c) 2005 Elsevier B.V. All rights reserved.
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