A millennium of north-east Atlantic cod juvenile growth trajectories inferred from archaeological otoliths.

Archaeological excavations of historical fishing sites across the North Atlantic have recovered high quantities of Atlantic cod (Gadus morhua) bones. In the current study we use Atlantic cod otoliths from archaeological excavations of a historical fishing sites in north-west Iceland, dated to AD 970...

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Bibliographic Details
Published in:PLOS ONE
Main Authors: Guðbjörg Ásta Ólafsdóttir, Gróa Pétursdóttir, Hlynur Bárðarson, Ragnar Edvardsson
Format: Article in Journal/Newspaper
Language:English
Published: Public Library of Science (PLoS) 2017
Subjects:
Medicine
R
Science
Q
atlantic cod
Gadus morhua
Iceland
North Atlantic
North East Atlantic
Online Access:https://doi.org/10.1371/journal.pone.0187134
https://doaj.org/article/04264720daa34c769f8c45961c47d880
Description
Summary:Archaeological excavations of historical fishing sites across the North Atlantic have recovered high quantities of Atlantic cod (Gadus morhua) bones. In the current study we use Atlantic cod otoliths from archaeological excavations of a historical fishing sites in north-west Iceland, dated to AD 970 -AD 1910 to examine historical growth trajectories of cod. No large scale growth variations or shifts in growth patterns were observed in the current chronologies, supporting the stability of historical Atlantic cod growth trajectories. The most significant variation in growth patterns was consistent with those that have been observed in recent times, for example, reduced early juvenile growth during periods of colder ocean temperature. The current results represent a high resolution chronological record of north-east Atlantic cod growth, greatly increasing the prior temporal range of such data, thereby providing a valuable baseline for a broad range of studies on Atlantic cod growth.

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