A manual for age determination of Pacific bluefin tuna Thunnus orientalis
Year: 2015
Type: article
Abstract: Age determination techniques for Pacific bluefin tuna Thunnus orientalis using sectioned otoliths have been developed in recent years and a protocol of age determination is described. Opaque zones close to the core in the sectioned otoliths are difficult to recognize and some criteria are provided. The distance from the core is useful to recognize the 1st and 2nd opaque zones. The 1st to ca. 9th opaque zones are formed with similar distances between opaque zones. After ca. 9th opaque zones are relatively easy to recognize. This information facilitates age and growth studies of Pacific bluefin tuna which is used for stock assessment of this valuable fish species.
Authors: Tamaki Shimose, Taiki Ishihara
Language: Japanese
Subfield: Aquatic Science
Domain: Life Sciences
SDG: Life below water
Open Access status: green
OpenAlex ID: W856171435