| アイテムタイプ |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2025-07-24 |
| タイトル |
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|
タイトル |
Relationship between seawater temperature, brain GnRH-like peptide expression, and gonadal development in wild bigfin reef squid (Sepioteuthis lessoniana) |
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言語 |
en |
| 言語 |
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|
言語 |
eng |
| キーワード |
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言語 |
en |
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主題Scheme |
Other |
|
主題 |
Cephalopod |
| キーワード |
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言語 |
en |
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主題Scheme |
Other |
|
主題 |
Reproduction |
| キーワード |
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|
言語 |
en |
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主題Scheme |
Other |
|
主題 |
GnRH-like peptide |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
Ovary |
| キーワード |
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|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
Testes |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
Sexual maturation |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
Gonadal development |
| キーワード |
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|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
Wild squid |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
Seawater temperature |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 著者 |
Kubo, Umina
Lee, Jaewoo
Murata, Ryosuke
Aoshima, Takashi
Mushirobira, Yuji
Soyano, Kiyoshi
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| 抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
Background: Cephalopods are widely distributed in oceans worldwide and are important fishery resources. Most species have a lifespan of approximately one year and die after reproduction. In cephalopods, gonadal development may be influenced by seawater temperature; however, the endocrine mechanisms underlying reproductive maturity remain unclear. In recent years, gonadotropin-releasing hormone (GnRH)-like peptide has been identified in invertebrates, including cephalopods, as a possible endocrine regulator, similar to their role in vertebrates. Nevertheless, knowledge of its specific functions in cephalopod reproduction remains limited. This study aimed to clarify the involvement of the endogenous peptide in gonadal development in cephalopods in the bigfin reef squid (Sepioteuthis lessoniana). We performed histological observations of gonadal maturation and analyzed brain expression levels and localization of the peptide throughout sexual maturation. Additionally, we examined the relationship between annual gonadal maturation and the seawater temperature cycle. Results: We identified coding sequences for peptides with conserved functional regions similar to those of other mollusks. Quantitative analysis revealed that brain expression significantly increased during the spermatid stage of testicular development, whereas no association with ovarian development was observed. Immunoreactivity was primarily localized in the optic lobe and around the optic gland, a central site of reproductive regulation in cephalopods. Although ovarian development progressed with increasing seawater temperature, testicular development showed no clear association with the temperature cycle. Conclusions: These findings suggest that GnRH-like peptides may contribute to early testicular development in S. lessoniana through optic gland signaling or direct neural pathways. In contrast, ovarian maturation appears to be strongly influenced by seawater temperature. This study provides foundational insight into the reproductive physiology of cephalopods and highlights regulatory mechanisms governing male and female gonadal development. |
|
言語 |
en |
| 書誌情報 |
en : Biological Research
巻 58,
号 1,
p. art. no. 46,
発行日 2025-07-02
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| 出版者 |
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出版者 |
BioMed Central Ltd |
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言語 |
en |
| ISSN |
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|
収録物識別子タイプ |
ISSN |
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収録物識別子 |
0717-6287 |
| DOI |
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関連タイプ |
isIdenticalTo |
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|
識別子タイプ |
DOI |
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関連識別子 |
10.1186/s40659-025-00626-1 |
| 権利 |
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|
権利情報 |
© The Author(s) 2025, corrected publication (2025). Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data. |
|
言語 |
en |
| 著者版フラグ |
|
|
出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| 引用 |
|
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内容記述タイプ |
Other |
|
内容記述 |
Biological Research, 58 (1), art. no. 46; 2025 |
|
言語 |
en |
BR58_46.pdf (2.8 MB)
