Changes in growth of marbled sole Pseudopleuronectes yokohamae between high and low stock-size periods in Tokyo Bay, Japan

Abstract

We examined age and growth of the marbled sole Pseudopleuronectes yokohamae collected from Tokyo Bay, Japan, during 2002−2008 when the stock size remained low. The von Bertalanffy growth equations differed significantly between sexes, and females attained a larger standard length than males of the same age. We compared the results with those reported for 1974−1983 and 1986−1988, when the stock size was high. The growth of marbled sole in Tokyo Bay during the 2000s was significantly higher than the growth in the 1970s and 1980s for both sexes. To explore possible factors causing changes in the growth, we examined bottom water temperature and population density. We found that the population density decreased and the bottom water temperature increased between the late 1970s and the 2000s. However, despite evidence of changes in population densities and water temperatures, further study is needed to determine the main factors causing the observed changes in growth.

Diel feeding rhythms, daily ration, and seasonal changes thereof in marbled flounder Pseudopleuronectes yokohamae

“…The lower values in the present study may be related to the high stock level. In another locality, density‐dependent effects in the growth of marbled flounder have been observed (Lee et al, ). The stock of marbled flounder has increased considerably in the study area because of the temporal termination and subsequent reduction of fishing efforts of coastal fisheries after the environmental disaster in 2011.…”

A preliminary study of dietary protein requirement of juvenile marbled flounder (Pseudopleuronectes yokohamae)

“…There are various factors determining the success of aquaculture, including water quality, environmental aspects, genetics, reproduction and life cycles, nutrition, food and feeding, disease, post-harvest technology and processing, and economics and marketing ( Lucas and Southgate, 2012 ). To date, most research conducted on this species is related to ecology, including the development of fertilized eggs, larvae, and juveniles ( Yusa, 1960 ; Han et al., 2001 ), reproduction and population dynamics ( Lee et al., 1985 ; Kang et al., 1985 ; Kume et al., 2006 ; Seo et al., 2010 ), feeding habits ( Huh et al., 2012 ), age, and growth ( Solomon et al., 1987 ; Kim et al., 1991 , 2015 ; Lee et al., 2009 ; Joo and Gwak, 2014 ). Among the factors for successful aquaculture, foods are critical because they generally constitute half of the total production costs.…”

Maturity and Spawning of the Marbled Flounder Pseudopleuronectes yokohamae off the Coast of Pohang, East Sea

“…, (Yusa, 1960;Han et al, 2001), (Lee et al, 1985;Kang et al, 1985), (Huh et al, 2012), (Suzuki, 1967;Solomon et al, 1987;Kim et al, 1991;Shafieipour et al, 1999;Kooka et al, 2000;Kume et al, 2006;Lee et al, 2009;Hoshio et al, 2012;Joo and Gwak., 2014;Kim et al, 2015), (Kume et al, 2006;Tanda et al, 2008;Seo et al, 2010) . , .…”