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Text
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URL Address
<a href="http://doi.org/10.1111/mms.12476" target="_blank" rel="noreferrer noopener">http://doi.org/10.1111/mms.12476</a>
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Pages
347-364
Issue
2
Volume
34
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Dublin Core
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Title
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Age estimation in bowhead whales using tympanic bulla histology and baleen isotopes
Publisher
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Marine Mammal Science
Date
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2018
2018-04
Subject
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Arctic; Balaena; Balaena mysticetus; bone; carbon; corpora; GLGs; growth; LAGs; layers; Marine & Freshwater Biology; minke whales; stable isotopes; tympanic bulla; Zoology
Creator
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Sensor J D; George J C; Clementz M T; Lovano D M; Waugh D A; Givens G H; Suydam R; Stimmelmayr R; Thewissen J G M
Description
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Tympanic bullae and baleen plates from bowhead whales of the Western Arctic population were examined. Growth layer groups (GLGs) in the involucrum of the tympanic bone were used to estimate age of the whales, and compared to stable isotope signatures along transects of baleen plates and the involucrum. The involucrum of the tympanic bone consists of three regions that form in utero, during nursing in the first year, and during the first decades of life, respectively. Life history events, such as annual migration, are recorded in the bowhead tympanic bulla. It is likely that bone growth in the bowhead tympanic occurs during periods of high food intake, while slow or arrested growth occurs during periods of low food intake. Comparisons between numbers of GLGs in the tympanic, number of isotopic oscillations in a baleen plate, length of the baleen plate, and total whale length show correlation coefficients as high as 0.97. The tympanic GLG method is particularly useful for estimating the age of whales up to 20 yr old.
Identifier
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<a href="http://doi.org/10.1111/mms.12476" target="_blank" rel="noreferrer noopener">10.1111/mms.12476</a>
Format
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Journal Article
2018
Arctic
Balaena
Balaena mysticetus
Bone
carbon
Clementz M T
corpora
George J C
Givens G H
GLGs
growth
Journal Article
LAGs
layers
Lovano D M
Marine & Freshwater Biology
Marine Mammal Science
minke whales
Sensor J D
Stable isotopes
Stimmelmayr R
Suydam R
Thewissen J G M
tympanic bulla
Waugh D A
Zoology