Acoustic Surveys of Spawning Japanese Sardine, <i>Sardinops melanostictus</i>, in the Waters off Western and Southern Kyushu, Japan
-
- Ohshimo Seiji
- Seikai National Fisheries Research Institute, Kokubu-machi
-
- Mitani Takumi
- Nansei National Fisheries Research Institute, Kouchi branch
-
- Honda Satoshi
- Hokkaido National Fisheries Research Institute
Bibliographic Information
- Other Title
-
- Acoustic Surveys of Spawning Japanese Sardine,Sardinops melanostictus,in the Waters off Western and Southern Kyushu,Japan
- Acoustic Surveys of Spawning Japanese S
- Acoustic surveys of spawning Japanese sardine, , in the waters off western and southern Kyushu, Japan.
Search this article
Abstract
Biomass of Japanese sardine Sardinops melanostictus was estimated using a quantitative echo sounder (Furuno, FQ-70; 50kHz) from 1990 to 1994 in the waters off western and southern Kyushu, in southwestern Japan, and the relative estimation error was calculated by geostatistics (1-D transitive theory). Sea surface water temperature and current vectors were measured using an electrical thermometer and ADCP (acoustic doppler current profiler), respectively. The estimated biomass of Japanese sardine using -31.5dB/kg of target strength was over 10 million metric tons in 1990, however, the estimated biomass was continuously decreasing. The estimated biomass was about 100 thousand tons in 1994. The distribution pattern of Japanese sardine was changed with biomass strength. In large biomass phase, Japanese sardine was widely distributed over the survey area, but restricted on the neritic area in small biomass phase.
Journal
-
- Fisheries science
-
Fisheries science 64 (5), 665-672, 1998
The Japanese Society of Fisheries Science
- Tweet
Details 詳細情報について
-
- CRID
- 1390282679405020416
-
- NII Article ID
- 130003903222
- 10004875752
-
- NII Book ID
- AA10993718
-
- NDL BIB ID
- 4591577
-
- ISSN
- 09199268
-
- Text Lang
- en
-
- Data Source
-
- JaLC
- NDL
- Crossref
- CiNii Articles
-
- Abstract License Flag
- Disallowed