DECADAL VARIATION IN EGG ABUNDANCE OF A MESOPELAGIC FISH, MAUROLICUS JAPONICUS, IN THE JAPAN SEA DURING 1981-2005

Authors

Tadanori Fujino, Japan Sea National Fisheries Research Institute, Niigata Prefecture, Japan.Follow
Tsuneo Goto, Japan Sea National Fisheries Research Institute, Niigata Prefecture, Japan.
Tsuyoshi Shimura, Tottori Prefectural Fisheries Experimental Station, Tottori Prefecture, Japan
Hiroki Yasuma, Field Science Center for Northern Biosphere, Hokkaido University, Hokkaido, Japan
Yongjun Tian, Japan Sea National Fisheries Research Institute, Niigata Prefecture, Japan
Hideaki Kidokoro, Japan Sea National Fisheries Research Institute, Niigata Prefecture, Japan
Shinya Masuda, Tottori Prefectural Fisheries Experimental Station, Tottori Prefecture, Japan.
Kazushi Miyashita, Field Science Center for Northern Biosphere, Hokkaido University, Hokkaido, Japan.

Abstract

Egg abundance of Maurolicus japonicus, a dominant mesopelagic fish in the Japan Sea, was analyzed during 1981-2005 as an index of the spawning-adult abundance. There was a major change in egg abundance around 1988/1989, with negative anomalies occurring during 1981-1988 and positive anomalies occurring from l989. At about the same time (1986/1987), the Tsushima Current shifted from cold to warm conditions. Environmental indices were found to be positively correlated with egg abundance two years later. Our results suggest that the abundance of M. japonicus is affected by climatic regime shifts, and that it could be used as an indicator species.

Recommended Citation

Fujino, Tadanori; Goto, Tsuneo; Shimura, Tsuyoshi; Yasuma, Hiroki; Tian, Yongjun; Kidokoro, Hideaki; Masuda, Shinya; and Miyashita, Kazushi (2013) "DECADAL VARIATION IN EGG ABUNDANCE OF A MESOPELAGIC FISH, MAUROLICUS JAPONICUS, IN THE JAPAN SEA DURING 1981-2005," Journal of Marine Science and Technology: Vol. 21: Iss. 1, Article 8.
DOI: 10.6119/JMST-011-0919-1
Available at: https://jmstt.ntou.edu.tw/journal/vol21/iss1/8