Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences >
Peer-reviewed Journal Articles, etc >
An allometric smoothing function to describe the relation between otolith and somatic growth over the lifespan of walleye pollock (Theragra chalcogramma)
Title: | An allometric smoothing function to describe the relation between otolith and somatic growth over the lifespan of walleye pollock (Theragra chalcogramma) |
Authors: | Katakura, Seiji Browse this author | Ikeda, Hisatoshi Browse this author | Nishimura, Akira Browse this author | Nishiyama, Tsuneo Browse this author | Sakurai, Yasunori Browse this author →KAKEN DB |
Issue Date: | 2007 |
Publisher: | NMFS Scientific Publications Office |
Journal Title: | Fishery Bulletin |
Volume: | 105 |
Issue: | 4 |
Start Page: | 447 |
End Page: | 456 |
Abstract: | We propose a new equation to describe the relation between otolith length (OL) and somatic length (fork length [FL]) of fish for the entire lifespan of the fish. The equation was developed by applying a mathematical smoothing method based on an allometric equation with a constant term for walleye pollock (Theragra chalcogramma) —a species that shows an extended longevity (>20 years). The most appropriate equation for defining the relation between OL and FL was a four-phase allometric smoothing function with three inf lection points. The inf lection points correspond to the timing of settlement of walleye pollock, changes in sexual maturity, and direction of otolith growth. Allometric smoothing functions describing the relation between short otolith radius and FL, long otolith radius and FL, and FL and body weight were also developed. The proposed allometric smoothing functions cover the entire lifespan of walleye pollock. We term these equations "allometric smoothing functions for otolith and somatic growth over the lifespan of walleye pollock." |
Type: | article |
URI: | http://hdl.handle.net/2115/35249 |
Appears in Collections: | 水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
|
Submitter: 桜井 泰憲
|