Comparison of spawning zone absence and presence in two NEA cod otoliths.
a) 10-year-old fish with no visible spawning zones; b) 10-year-old fish with five visible spawning zones, identified as a cluster of similar-looking narrow increments with significantly wider translucent zones. Black circles mark regular growth increments; white circles mark spawning zones as descri...
Main Authors: | , , , |
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Format: | Still Image |
Language: | unknown |
Published: |
2021
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Subjects: | |
Online Access: | https://doi.org/10.1371/journal.pone.0257218.g001 |
Summary: | a) 10-year-old fish with no visible spawning zones; b) 10-year-old fish with five visible spawning zones, identified as a cluster of similar-looking narrow increments with significantly wider translucent zones. Black circles mark regular growth increments; white circles mark spawning zones as described above; semi-filled white circles indicate an incomplete marginal increment that would likely be a spawning zone when fully formed. |
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