Mathematical Investigations into the Longevity of the Ocean Quahog Arctica islandica (Mollusca: Bivalvia)
Abstract Annual internal growth banding of Arctica islandica has shown that the species has a surprising longevity of up to 149 years as stated by THOMPSON , JONES and DREIBELBIS (1980). The authors have compiled 100 values of valve height against age as reproduced in Figure 1. Visually gained growt...
| Published in: | Internationale Revue der gesamten Hydrobiologie und Hydrographie |
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| Main Authors: | , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Wiley
1983
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1002/iroh.19830680107 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Firoh.19830680107 https://onlinelibrary.wiley.com/doi/pdf/10.1002/iroh.19830680107 |
| Summary: | Abstract Annual internal growth banding of Arctica islandica has shown that the species has a surprising longevity of up to 149 years as stated by THOMPSON , JONES and DREIBELBIS (1980). The authors have compiled 100 values of valve height against age as reproduced in Figure 1. Visually gained growth curves have been added for single specimens that leave some doubt as to the existence of an inflexion point. In this paper a cross‐sectional evaluation of growth behaviour is carried out with nine funtions using nonlinear regressions. Five growth functions yield almost equally good results with a final valve height just below 100 mm. An inflexion point is either present in early youth or lacking altogether, depending on the growth function used. |
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