Yoshitsugu Masuda | Researchain

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Featured researches published by Yoshitsugu Masuda.

Fish Physiology and Biochemistry | 2013

MECHANISM OF OOCYTE MATURATION AND OVULATION, AND ITS APPLICATION TO SEED PRODUCTION IN THE JAPANESE EEL

Hirohiko Kagawa; Y. Sakurai; R. Horiuchi; Yukinori Kazeto; Koichiro Gen; Hitoshi Imaizumi; Yoshitsugu Masuda

Reduction in eel resources and catches of glass eels as seedlings for aquaculture have been a serious concern in recent years in both Europe and East Asia. Thus, technical advancement to produce eel seeds for artificial cultivation is most desired. Fundamental information on oocyte maturation and ovulation and its application to artificial induction of sexual maturation are needed to produce good quality seeds of the Japanese eel. This review introduces hormonal mechanisms of cytoplasmic maturation (such as hydration, lipid coalescence, and clearing of the ooplasm) and the maturational competence (the ability to respond to maturation-inducing steroid) and nuclear maturation (germinal vesicle breakdown). In addition, previous and newly developed methods for induction of spawning have been described.

Fisheries Science | 2013

Effect of feeding rotifers enriched with taurine on the growth and survival of larval amberjack Seriola dumerili

Hiroyuki Matsunari; Hiroshi Hashimoto; Takashi Iwasaki; Kentaro Oda; Yoshitsugu Masuda; Hitoshi Imaizumi; Kazuhisa Teruya; Hirofumi Furuita; Takeshi Yamamoto; Kazuhisa Hamada; Keiichi Mushiake

Aquaculture Research | 2012

Effects of docosahexaenoic acid on growth, survival and swim bladder inflation of larval amberjack ( Seriola dumerili, Risso)

Hiroyuki Matsunari; Hiroshi Hashimoto; Kentaro Oda; Yoshitsugu Masuda; Hitoshi Imaizumi; Kazuhisa Teruya; Hirofumi Furuita; Takeshi Yamamoto; Kazuhisa Hamada; Keiichi Mushiake

Fisheries Science | 2013

A step forward in development of fish protein hydrolysate-based diets for larvae of Japanese eel Anguilla japonica

Yoshitsugu Masuda; Tadao Jinbo; Hitoshi Imaizumi; Hirofumi Furuita; Hiroyuki Matsunari; Koji Murashita; Hiroshi Fujimoto; Jirou Nagao; Yutaka Kawakami

Aquaculture | 2013

Administration of 17α-hydroxyprogesterone into mature male Japanese eel reduces sperm motility by decreasing potassium ion concentrations in the seminal plasma

Akira Miura; Kazuharu Nomura; Hitoshi Imaizumi; Tadao Jinbo; Yoshitsugu Masuda; Hideki Tanaka; Hiromi Ohta

Aquaculture | 2013

Using osmotic pumps to deliver hormones to induce sexual maturation of female Japanese eels, Anguilla japonica

Hirohiko Kagawa; Nobuhiro Fujie; Hitoshi Imaizumi; Yoshitsugu Masuda; Kentaro Oda; Junichi Adachi; Akefumi Nishi; Hiroshi Hashimoto; Kazuhisa Teruya; Shunji Kaji

Aquaculture International | 2012

Effect of different algae used for enrichment of rotifers on growth, survival, and swim bladder inflation of larval amberjack Seriola dumerili

Hiroyuki Matsunari; Hiroshi Hashimoto; Kentaro Oda; Yoshitsugu Masuda; Hitoshi Imaizumi; Kazuhisa Teruya; Hirofumi Furuita; Takeshi Yamamoto; Kazuhisa Hamada; Keiichi Mushiake

Aquaculture Science | 2013

Optimal Photoperiod Condition for Culturing Early Larvae of Greater Amberjack Seriola dumerili Inferred from Diurnal Rhythm of Feeding Activity and Mass Seed Production

Hiroshi Hashimoto; Keishi Matsuda; Yoshitsugu Masuda; Tadao Jinbo; Hitoshi Imaizumi; Kazuhisa Teruya; Kazuhisa Hamada; Keiichi Mushiake; Katsuyuki Hamasaki

Aquaculture Science | 2013