Papers - Ichikawa Takashi
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mtDNA ND5とND6領域の塩基配列によるシシャモの遺伝的手段構造 Reviewed
市川卓，柳本卓，工藤智
DNA多型 31 ( 1 ) 12 - 17 2023.07
Authorship：Lead author, Corresponding author Language：Japanese Publishing type：Research paper (scientific journal)
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Dietary effects on larval survival and development of three sesarmid crabs Reviewed International journal
Toyota Kenji, Ichikawa Takashi, Suzuki Nobuo, Ohira Tsuyoshi
Plankton and Benthos Research 18 ( 2 ) 84 - 92 2023.05
Language：English Publishing type：Research paper (scientific journal) Publisher：The Plankton Society of Japan, The Japanese Association of Benthology
<p>Semi-terrestrial brachyuran sesarmid crabs are the most diverse and important faunal components of mangrove forest and temperate coastal communities worldwide. To establish a stable larval rearing method for understanding their larval developmental processes including molecular mechanisms of molting and metamorphosis, we examined the effects of diet on the survival and growth of three sesarmid crabs, <i>Chiromantes haematocheir</i>, <i>Orisarma intermedium</i>, and <i>O</i>. <i>dehaani</i> under larval development. Zoea of each species, immediately after hatching, were reared under different feeding conditions as follows: non-feeding; fed only nutrition-enriched rotifers; fed only Artemia (brine shrimp) nauplii; and fed a combination of both nutrition-enriched rotifers and brine shrimp. Larvae of each species survived almost to megalopa when they were fed both rotifer and brine shrimp, but all <i>C. haematocheir</i> larvae had died by zoeal stage 2 when they were only fed brine shrimp. <i>Chiromantes haematocheir</i> larvae could survive into the megalopa stage when fed only nutrition-enriched rotifer, whereas both <i>O</i>. <i>dehaani</i> and <i>O</i>. <i>intermedium</i> showed 50% or less survival and metamorphosis rates into megalopa. The duration of larval development and survival rates of the three crabs were shorter and higher, respectively, in the mixed feeding group (both rotifer and brine shrimp) than when only fed rotifer or brine shrimp. This study provides baseline knowledge of the interspecific variability in larval survival and duration under different diets for sympatric sesarmid crab species.</p>
DOI： 10.3800/pbr.18.84
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A microplate incubation method for assessing egg quality of the barfin flounder: effects of well size and rearing medium on larval viabilit Reviewed
Tatsuya Unuma, Takashi Ichikawa, Sayumi Sawaguchi, Natsuki Hasegawa
Aquaculture International 27 ( 1 ) 195 - 208 2019
Language：English Publishing type：Research paper (scientific journal)
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Larval survival, development and growth in the horsehair crab, Erimacrus isenbeckii, cultured under different photoperiod condition Reviewed
Ichikawa Takashi, Hamasaki Katsuyuki, Murakami keisuke.
Aquaculture Research 49 ( 7 ) 2511 - 2517 2018.05
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (scientific journal)
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Determination of the spawning history of Pacific saury Cololabis saira from rearing experiments: identification of post‑spawning fish from histological observations of ovarian arterioles Reviewed International journal
Satoshi Suyama, Akio Shimizu, Sayoko Isu, Hitomi Ozawa, Taizo Morioka, Mitsuhiro Nakaya, Toru Nakagawa, Naoto Murakami, Takashi Ichikawa, Yasuhiro Ueno
Fishriese Science 85 445 - 457 2016.04
Language：English Publishing type：Research paper (scientific journal)
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ICHIKAWA TAKASHI, NAWA YOKO, HAMASAKI KATSUYUKI, MURAKAMI KEISUKE
NIPPON SUISAN GAKKAISHI 80 ( 3 ) 349 - 359 2014.05
Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Fisheries Science
The larval sinking phenomenon is a cause of larval mass mortality during seed production of the horsehair crab <i>Erimacrus isenbeckii</i>. As a basis for developing larval rearing techniques to prevent this phenomenon, we examined the larval phototaxis, vertical distribution, body density and external morphology such as carapace spines, which may provide drag force while larvae are sinking in seawater. Larvae showed positive phototaxis in the first zoeal stage, and showed strengthened negative phototaxis after the second zoeal stage. Higher incidences of negative phototactic behavior were recorded at longer wavelengths of more than 620 nm in all larval stages. Newly hatched larvae floated in the vertical test chamber, but they tended to sink in the chamber one day after hatching. Larval body density was greater than the specific gravity of the seawater. The length of carapace spines tended to decrease with larval growth. The horsehair crab larvae thus showed a behavioral habit that makes them sink in seawater under the light condition. Further studies should examine methods for rearing horsehair crab larvae under dark conditions or under light of longer wavelengths from the bottom of the vertical chamber.<br>
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ケガニ種苗生産における光環境が幼生の沈降と発育に及ぼす影響 Reviewed
市川 卓, 村上 直人, 森岡 泰三, 村上 恵祐, 浜崎 活幸
水産増殖 62 ( 1 ) 65 - 73 2014.03
Authorship：Lead author Language：English Publishing type：Research paper (scientific journal) Publisher：水産増殖談話会
ケガニの種苗生産において，幼生が沈降した後に大量死することが問題になっている。幼生の沈降を回避する飼育技術を開発する基礎として，水槽内の光環境が幼生の沈降と発育に及ぼす影響を透明ポリカーボネート製と黒色ポリエチレン製の水槽を用いて調べた。また，攪拌機による飼育水の攪拌効果も予備的に検討した。昼間の光環境は水槽種類で大きく異なり，光量子束密度は黒色水槽では水深に比例して減少したが，透明水槽では中層と下層で大きい値を示した。水槽内の下層に分布したケガニ幼生の割合（沈降率）は日齢とともに大きくなった。昼間の水槽内分布は飼育水の機械的攪拌から影響を受けなかったが，沈降率は透明水槽を使用した場合に高かった。また，幼生の発育は透明水槽で遅延した。さらには，沈降率は昼間より夜間の値が低く，水槽間の差が縮小した。以上のように，水槽内の光環境が幼生の水槽内分布と発育に大きな影響を及ぼすことが明らかとなった。
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Aquaculture Science 61 ( 3 ) 293 - 302 2013.09
Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)
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Species identification of pufferfish juveniles collected in Shibetsu Bay, Hokkaido, Japan, using nucleotide sequences of mitochondrial DNA Reviewed
Takashi Yanagimto1, Tomotaka Nishio, Masaki Ichimura, Takashi Ichikawa
Aquqtic Animals 2024 ( 0 ) AA2024-13 2024.06
Authorship：Last author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Aquos Institute
Tetraodontid juveniles (n = 54) were collected from Shibetsu Bay, Hokkaido, Japan, on August 30, 2022. Since morphological identification to species was difficult, DNA barcoding was performed. The nucleotide sequences of mitochondrial 16S rDNA (16S), cytochrome c oxidase subunit I (COI), cytochrome b (Cyt b), and the control region (CR) of these juveniles were determined. Database homology search and phylogenetic analysis using COI, Cyt b and CR sequences unambiguously determined these juveniles as the purple puffer Takifugu porphyreus, whereas those using 16S sequence could not diagnostically identify these juveniles. In recent years, the catch of T. porphyreus in Hokkaido has increased rapidly, but information on the juveniles from this area is scarce. Future research is needed to explore the possibility that earlier life stages of T. porphyreus may exist in the vicinity of Shibetsu Bay.
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Morphometric approaches reveal sexual differences in the carapace shape of the horsehair crab, Erimacrus isenbeckii (Brandt, 1848). Reviewed
Kenji Toyota, Kentaro Izumi, Takashi Ichikawa, Tsuyoshi Ohira, Ken Takeuchi.
Aquatic Animals AA2020-1. 2020.03
Language：English Publishing type：Research paper (scientific journal)
DOI： https://doi.org/10.34394/aquaticanimals.AA2020.0_AA2020-1
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Genetic diversity in type B of Palaemon paucidens Reviewed
Aquatic Animals 2019 2019
Language：Japanese Publishing type：Research paper (scientific journal)
DOI： https://doi.org/10.34394/aquaticanimals.AA2019.0_AA2019-11
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Gonadal maturation and spawning migration of stocked female barfin flounder Verasper moseri off the Pacific coast of northern Japan Reviewed
Takaaki Kayaba, Toshihiro Wada, Kyoichi Kamiyama, Osamu Murakami, Hidetsugu Yoshida, Sayumi Sawaguchi, Takashi Ichikawa, Yuichiro Fujinami, Shinsaku Fukuda
Fishriese Science 80 735 - 748 2014.06
Language：English Publishing type：Research paper (scientific journal)
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Determination of ghrelin structure in the barfin flounder (Verasper moseri) and involvement of ingested fatty acids in ghrelin acylation Reviewed
Hiroyuki Kaiya, Tadashi Andoh, Takashi Ichikawa, Noriko Amiya, Kouhei Matsuda, Kenji Kangawa and Mikiya Miyazato
Frontiers in Endocrinology 4 ( 117 ) 1 - 11 2013.09
Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)
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SHIRAFUJI Norio, MURAKAMI Naoto, MORIOKA Taizo, ICHIKAWA Takashi, FUKUNAGA Kyohei, ANDOH Tadashi
Aquaculture Science 59 ( 3 ) 403 - 410 2011.09
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japanese Society for Aquaculture Science
Larval Pacific herring <I>Clupea pallasii</I> has been considered a potential prey item of juvenile chum salmon <I>Oncorhynchus keta</I> because they share habitat in the coastal area of northern Japan, in spring. We experimented on predation of larval herring by juvenile salmon in captivity. The juvenile salmon fed 4.7-7.4% body weight of live and the frozen-thawed larval herrings. The larvae were digested quickly in the stomach and 50% of them were evacuated from the stomach in 2-4 hours. They were morphologically identifiable up to 3-6 hours after being fed. Quick digestion and short duration time of fish in the stomach need to be considered in field surveys of salmon feeding habit. Predation mortality by juvenile salmon may have considerable impact on larval survival of herring.
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Verification of growth dependent survival in early life history of Pacific saury Cololabis saira using laboratory experiment Reviewed
Mitsuhiro Nakaya, Taizo Morioka, Kyohei Fukunaga, Naoto Murakami, Takashi Ichikawa, Sachio Sekiya, Satoshi Suyama, Yasuhiro Ueno, Akio Shimizu
Environmental Biology of Fishes 92 113 - 123 2011.05
Language：English Publishing type：Research paper (scientific journal)
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Aquaculture Science 58 ( 2 ) 301 - 303 2010.06
Language：English Publishing type：Research paper (scientific journal)
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57 ( 4 ) 625 - 626 2009.12
Language：English Publishing type：Research paper (scientific journal)
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Relationships Between Survival Period and Temperature of Newly Hatched Pacific saury Cololabis saira under Starvation Conditions Reviewed
Mitsuhiro Nakaya, Taizo Morioka, Kyohei Fukunaga, Naoto Murakami, Takashi Ichikawa, Sachio Sekiya, Satoshi Suyama
Aquaculture Science 57 ( 4 ) 625 - 626 2009.12
Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)
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黒色水槽を用いたケガニ幼生の浮遊性を確保する飼育手法の検討 Reviewed
市川 卓, 福永 恭平, 村上 恵祐
栽培漁業センター技報 ( 9 ) 20 - 23 2009.03
Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：水産総合研究センター
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ケガニ幼生の沈降防止手法の検討 Reviewed
市川 卓, 福永 恭平, 村上 恵祐
栽培漁業センター技報 ( 6 ) 24 - 27 2007.05
Authorship：Lead author, Corresponding author Language：Japanese Publishing type：Research paper (bulletin of university, research institution) Publisher：水産総合研究センター
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Egg size and relationship between seawater temperature and egg incubation period of the red frog crab Ranina ranina (Decapoda: Raninidae) reared in the laboratory Reviewed
TAKASHI ICHIKAWA, KATSUYUKI HAMASAKI, KAZUHISA HAMADA
NIPPON SUISAN GAKKAISHI 70 ( 3 ) 343 - 347 2004
Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal)