An allometric smoothing function to describe the relation between otolith and somatic growth over the lifespan of walleye pollock (Theragra chalcogramma)

Katakura, Seiji and Ikeda, Hisatoshi and Nishimura, Akira and Nishiyama, Tsuneo and Sakurai, Yasunori (2007) An allometric smoothing function to describe the relation between otolith and somatic growth over the lifespan of walleye pollock (Theragra chalcogramma). Fishery Bulletin, 105(4), pp. 447-456.

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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 inflection points. The inflection 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.”

Item Type: Article
Title: An allometric smoothing function to describe the relation between otolith and somatic growth over the lifespan of walleye pollock (Theragra chalcogramma)
Personal Creator/Author:
CreatorsEmail
Katakura, Seiji
Ikeda, Hisatoshi
Nishimura, Akira
Nishiyama, Tsuneo
Sakurai, Yasunori
Refereed: Yes
Journal or Publication Title: Fishery Bulletin
Volume: 105
Number: 4
Page Range: pp. 447-456
Date: 2007
ISSN: 0090-0656
Issuing Agency: United States National Marine Fisheries Service
Subjects: Biology
Ecology
Fisheries
Item ID: 8860
Depositing User: Patti M. Marraro
Date Deposited: 14 Jun 2012 17:12
Last Modified: 14 Jun 2012 17:12
URI: http://aquaticcommons.org/id/eprint/8860

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