Energetics of the extremely long-living bivalve Arctica islandica based on a Dynamic Energy Budget model
The ocean quahog Arctica islandica is the longest–living mollusk on Earth with a lifespan of at least 500 years. The slow senescence of this bivalve has promoted a great interest in its metabolic strategy. A dynamic energy budget (DEB) model was applied to describe how this species allocates its ene...
Published in: | Journal of Sea Research |
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Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2019
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Subjects: | |
Online Access: | https://research.vu.nl/en/publications/96c3ae3f-9d41-4f8e-8e0f-cc73c573e2bd https://doi.org/10.1016/j.seares.2018.09.016 https://hdl.handle.net/1871.1/96c3ae3f-9d41-4f8e-8e0f-cc73c573e2bd http://www.scopus.com/inward/record.url?scp=85054447062&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85054447062&partnerID=8YFLogxK |
Summary: | The ocean quahog Arctica islandica is the longest–living mollusk on Earth with a lifespan of at least 500 years. The slow senescence of this bivalve has promoted a great interest in its metabolic strategy. A dynamic energy budget (DEB) model was applied to describe how this species allocates its energy to maintenance, growth, maturation, and reproduction in a variable environment. We studied the relationship between A. islandica growth, lifespan, and food availability at eight different locations in the North Atlantic Ocean. Our results indicate that A. islandica's extreme longevity arises from its low somatic maintenance cost ṗ M and low ageing acceleration h¨ a , but there was not a direct relationship between food availability and lifespan in these A. islandica locations. Monkey Bank (North Sea), Iceland, and Ingøya (northern Norway) had the highest food availability estimates of all the localities but did not have the lowest longevities, in contrast to the theory of caloric restriction. |
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