- Original Paper
-
Hideaki KIDOKORO, Shigeru YASUGI, Tsuyoshi SHIMURA and Osamu KATOHBull. Fish. Res. Agen. No.14, 1-6, 2005
-
Yuji TOMARU, Noriaki KATANOZAKA, Yuichi KOTANI, Goro YOSHIDA, Satoshi YAMANAKA, Hiroshi TANABE, Mineo YAMAGUCHI, and Keizo NAGASAKIBull. Fish. Res. Agen. No.14, 7-20, 2005
-
Motoharu UCHIDABull. Fish. Res. Agen. No.14, 21-85, 2005
Doctoral Thesis
abstract
Original PaperTitle | Distribution of pre-recruit Jack mackerel (Trachurus japonicus) in the south-western Sea of Japan and its relation to the Tsushima Current |
---|---|
Authers | Hideaki KIDOKORO *1, Shigeru YASUGI *2, Tsuyoshi SHIMURA *3 and Osamu KATOH *1 |
Keywords | Jack mackerel, Trachurus japonicus, Tsushima Current, prerecruit |
Citation | Bull. Fish. Res. Agen. No.14, 1-6, 2005 |
Abstract |
Most jack mackerel Trachurus japonicus caught from the Sea of Japan are mainly spawned in the East China Sea and migrate into the Sea of Japan through the Tsushima Strait. This study was conducted to identify this migration route. Surveys were conducted by three research vessels using midwater trawls to determine the distribution of pre-recruit Jack mackerel and its relation to the Tsushima Current from late May to middle of June in 2002. Jack mackerel were caught in 42 of 48 tows (maximum catch : 474, station average : 38.2). The average fork length at each station ranged 28.3-54.2mm. Based on previously published age-length data, these fish were estimated to have hatched between April and early May in 2002. Jack mackerel were caught mainly in the onshore branch of the Tsushima Current, and few were caught in the offshore branch, suggesting that most pre-recruit jack mackerel were transported into the Sea of Japan by the onshore branch of Tsushima Current.
|
Received on September 24, 2004
*1 Japan Sea National Fisheries Research Institute, Suido-cho, Niigata 951-8121, Japan
*2 Shimane Prefectural Fisheries Experimental Station, Setogashima, Hamada 697-0051, Japan
*3 Tottori Prefectural Fisheries Experimental Station, Takeuchi-Danchi, Sakaiminato 684-0046, Japan
Title | Effects of viruses infecting harmful algae, HaV, HcV and HcRNAV on bivalves, zooplankton, seaweeds, fishes, and a mouse |
---|---|
Authers | Yuji TOMARU *1, Noriaki KATANOZAKA *2, *3, Yuichi KOTANI *4, Goro YOSHIDA *5, Satoshi YAMANAKA *2, Hiroshi TANABE *2, Mineo YAMAGUCHI *5, and Keizo NAGASAKI *5 |
Keywords | Red tide, Algal virus, Acute toxicity, Safety |
Citation | Bull. Fish. Res. Agen. No.14, 7-20, 2005 |
Abstract |
Harmful bloom-forming algae, Heterosigma akashiwo (Hada) Hada (Raphidophyceae) and Heterocapsa circularisquama Horiguchi (Dinophyceae) cause a mass mortality of cultured fish and bivalves, respectively. In recent years, a double-stranded DNA (dsDNA) virus HaV infectious to H. akashiwo, and a dsDNA virus HcV and a single-stranded RNA (ssRNA) virus HcRNAV, both infectious to H. circularisquama were isolated from natural seawaters in Japan. These viruses have some important characteristics suitable as microbiological algicidal agents. However, from the viewpoint of risk management, evaluation of their effects on various organisms is essential to assess the possibility of their use for eliminating the harmful algal blooms. In the present study, we have evaluated effects of the viruses on marine organisms (bivalves, zooplankton, seaweeds and fishes) and mammals (a mouse), and revealed that there was no significant acute toxicity against the tested organisms through the experiments. These results suggest that the algal viruses are safe for other organisms.
|
Received on October 25, 2004
*1 National Research Institute of Fisheries and Environment of Inland Sea, 2-17-5 Maruishi, Ohno, Saeki, Hiroshima 739-0452, Japan
*2 SDS Biotech K.K, Midorigahara 2-1, Tsukuba, Ibaraki 300-2646, Japan
*3 Hitec Co. Ltd., 1-8-30 Tenmabashi, Kita, Osaka 530-6025, Japan
*4 National Research Institute of Fisheries Science, Hukuura 2-14-4, Kanazawa, Yokohama, Kanagawa 236-8648, Japan
*5 National Research Institute of Fisheries and Environment of Inland Sea, 2-17-5 Maruishi, Ohno, Saeki, Hiroshima 739-0452, Japan
Doctoral Thesis
Title | Studies on lactic acid fermentation of seaweed |
---|---|
Authers | Motoharu UCHIDA * |
Keywords | Fermentation, Seaweed, Lactic acid bacteria, Lactobacillus brevis, Undaria pinnatifida |
Citation | Bull. Fish. Res. Agen. No.14, 21-85, 2005 |
Abstract |
Marine bio-resources have been utilized mostly by catch by mankind. In future, however, the marine bio-resources are expected to be highly utilized by developing novel fish culture skills and food processing techniques. Fermentation skills are greatly contributing to food producing and processing industries today. However, most fermented products are terrestrial origin and marine origin products are quite limited. Especially, a skill to ferment algal materials (plant materials of marine origin) has never been developed in the field of fisheries industry.
|
Received on August 1, 2005
*1 National Research Institute of Fisheries and Environment of Inland Sea, Maruishi 2-17-5, Ohno, Saeki, Hiroshima 739-0452, Japan