Ryosuke Murata
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View article: Exploring lactic acid bacteria in food, human health, and agriculture
Exploring lactic acid bacteria in food, human health, and agriculture Open
Lactic acid bacteria (LAB) are ubiquitous multifaceted microorganisms widely used in food and agricultural industries due to their metabolic adaptability, safety and beneficial bioactivities. This review provides a comprehensive synthesis …
View article: Water temperature effects on embryonic development and GnRH-like expression in kisslip cuttlefish (Sepia lycidas) hinting the potential role of GnRH-like peptide
Water temperature effects on embryonic development and GnRH-like expression in kisslip cuttlefish (Sepia lycidas) hinting the potential role of GnRH-like peptide Open
Gonadotropin-releasing hormone (GnRH)-like peptides are multifunctional neuropeptides involved in cardiac control, early ontogenesis, and reproduction in cephalopods. However, the precise role of GnRH-like peptides in embryonic development…
View article: Endocrine Regulation of Maturation and Sex Change in Groupers
Endocrine Regulation of Maturation and Sex Change in Groupers Open
Groupers are widely distributed in tropical and subtropical areas worldwide, are key species to coastal ecosystems, and valuable fishery targets. To facilitate artificial seed production technology for grouper aquaculture, the mechanisms o…
View article: Expression of the Antimicrobial Peptide Piscidin 1 and Neuropeptides in Fish Gill and Skin: A Potential Participation in Neuro-Immune Interaction
Expression of the Antimicrobial Peptide Piscidin 1 and Neuropeptides in Fish Gill and Skin: A Potential Participation in Neuro-Immune Interaction Open
Antimicrobial peptides (AMPs) are found widespread in nature and possess antimicrobial and immunomodulatory activities. Due to their multifunctional properties, these peptides are a focus of growing body of interest and have been character…
View article: Male Pheromones Induce Ovulation in Female Honeycomb Groupers (Epinephelus merra): A Comprehensive Study of Spawning Aggregation Behavior and Ovarian Development
Male Pheromones Induce Ovulation in Female Honeycomb Groupers (Epinephelus merra): A Comprehensive Study of Spawning Aggregation Behavior and Ovarian Development Open
This study characterizes the spawning phenomena of the honeycomb grouper (Epinephelus merra), which is a lunar-synchronized spawner that spawns a few days after full moon. To elucidate the aggregation characteristics of wild honeycomb grou…
View article: Morphological and physiological studies on sex change in tropical fish: Sexual plasticity of the ovaries of hermaphroditic and gonochoristic fish
Morphological and physiological studies on sex change in tropical fish: Sexual plasticity of the ovaries of hermaphroditic and gonochoristic fish Open
To clarify the role of estrogens in the onset of sex change in fish, estrogen levels were artificially reduced in hermaphroditic and gonochoristic female fish via the treatment with aromatase inhibitors (AIs). AI treatments caused depletio…
View article: Lunar-related maturation and spawning migration in the honeycomb grouper, <i>Epinephelus merra</i>
Lunar-related maturation and spawning migration in the honeycomb grouper, <i>Epinephelus merra</i> Open
To better understand the eco-physiological characteristics of reproduction in the coral reef small honeycomb grouper, Epinephelus merra, we investigated their spawning migration using biotelemetry, in addition to reproductive physiology an…
View article: Testicular inducing steroidogenic cells trigger sex change in groupers
Testicular inducing steroidogenic cells trigger sex change in groupers Open
Vertebrates usually exhibit gonochorism, whereby their sex is fixed throughout their lifetime. However, approximately 500 species (~ 2%) of extant teleost fishes change sex during their lifetime. Although phylogenetic and evolutionary ecol…
View article: Morphological and physiological studies regarding gonadal differentiation and sex change in Serranidae
Morphological and physiological studies regarding gonadal differentiation and sex change in Serranidae Open
重要な養殖対象魚種であるハタ科魚類の生殖生理機構の特性解明に取り組んだ。最初にヤイトハタ幼魚の生殖腺を形態学的に解析し，ハタ科魚類の性分化と性ステロイドホルモンの関係を調べた。次に小型のカンモンハタを対象に，性転換の生理機構を明らかにした。更に，これらの基礎知見に基づき未成魚および成魚の人為的性転換誘導技術の開発に取り組み，従来法に加えてアロマターゼインヒビターおよび生殖腺刺激ホルモンを用いた新たな性転換誘導技術を開発した。
View article: A Study on the Downsizing Plan for the Renewal of the Main Distribution Pipeline in Consideration of Future Fluctuations in Water Demand
A Study on the Downsizing Plan for the Renewal of the Main Distribution Pipeline in Consideration of Future Fluctuations in Water Demand Open
本研究では，配水管網ネットワーク内での基幹管路である配水本管に着目して，水需要の経年変化を考慮した更新計画について分析を行った．管路更新後の配水ネットワークの冗長性を確保する目的で，供給点からの管路延長を基準とした３つの区分（上流，中流，下流）に分けて，給水に必要な配水小管上での有効水頭を確保できる縮径の組み合わせを検討した．更新の対象管路は非耐震継手管として，【更新優先度順】【布設年度順】【流量順】の３つの更新シナリオを設定し，配水小管上での最小有効水頭や更新工事費用，更…