Re-examination of growth and maturation of red tilefish Branchiostegus japonicus in the East China Sea

Hideyuki Yamashita, Takeshi Sakai, Satoshi Katayama, Tadashi Tokai

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

The catch of red tilefish Branchiostegus japonicus in the East China Sea steeply decreased in the 1990s. Although life history of the red tilefish was studied before the 1970s, the life history traits of the red tilefish will have changed with the decline of population size in the 1990s. We validated the aging method of otolith observation and re-researched the growth and maturation of the fish using monthly samples in 1996-2000. Bertalanffy growth equations of female and male fish were estimated as l(t) = 375(1-e-0.317(t+0.420)) and l(t) = 520(1-e-0.194(t+0.761)), respectively. Fifty percent maturation sizes in total length were 302 mm and 253 mm for males and females, respectively. The spawning season was from May to December with a peak of September to October, and the main spawning season varied among fishing grounds. Obvious changes in age and growth, spawning period, and maturation characteristics were not detected after the steep decline in the 1990s. Based on the life history traits obtained in this study, fisheries management strategies should be re-examined focusing on the variation in spawning season among fishing grounds.

Original languageEnglish
Pages (from-to)188-198
Number of pages11
JournalNippon Suisan Gakkaishi (Japanese Edition)
Volume77
Issue number2
DOIs
Publication statusPublished - 2011
Externally publishedYes

Keywords

  • Branchiostegus japonicus

ASJC Scopus subject areas

  • Aquatic Science

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