2000 Fiscal Year Final Research Report Summary
Molecular Basis for Neurohormonal Control of Salmonid Spawning Migration
| Project/Area Number |
10102001
|
|---|
| Research Category |
Grant-in-Aid for Specially Promoted Research
|
| Allocation Type | Single-year Grants |
|---|
| Review Section |
Biological Sciences
|
|---|
| Research Institution | Grant-in Aid for Specially Promoted Research (2) |
|---|
Principal Investigator |
URANO Akihisa Hokkaido Univ., Grad.Sch.of Sci., Prof., 大学院・理学研究科, 教授 (00142232)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
ANDO Hironori Hokkaido Univ., Grad.Sch.of Sci., Assist.Prof., 大学院・理学研究科, 助手 (60221743)
ITO Etsuro Hokkaido Univ., Grad.Sch.of Sci., Assoc.Prof., 大学院・理学研究科, 助教授 (80203131)
ABE Shuiti Hokkaido Univ., Fac.of Sci., Assoc.Prof., 理学部, 助教授 (80125278)
|
|---|
| Project Period (FY) |
1998 – 2000
|
| Keywords | Salmon / Migration / Neurohormone / GnRH / Vasotocin / Genetic Program / Instinctive Behavior |
|---|
| Research Abstract |
Spawning migration of salmon is a typical stereotyped or instinctive behavior which is genetically programmed. However, molecular approaches are rare to reveal what is a genetic program of salmon migration. Aiming clarification of such genetic program as the final goal, we examined molecular bases of neuroendocrine mechanisms for salmon spawning migration. Since spawning migration is reproductive behavior, we hypothesized that preoptic neurons producing gonadotropin-releasing hormone (GnRH) and vasotocin (VT) have a crucial role in coordination of the sensory, motor and motivational function of the central nervous system and the neuroendocrine function of the brain-pituitary-gonadal axis. The coordinated activity of the central nervous system and the neuroendocrine system should be crucial for the success of reproduction, that is, the neural controls of migratory and spawning behavior must be temporally and spacially coincident. Herewith. we determined absolute changes in the amounts of mRNAs encoding neurohormones and pituitary hormones along migratory pathways to elucidate changes in expression of hormonal genes during migration. We further analyzed regulatory mechanisms of expression of hormonal genes in salmonids. The results obtained through the present project actually support our hypothesis mentioned above.
|
-
-
-
-
-
-
-
-
-
-
[Publications] Taniyama, S., Kitahashi, T., Ando, H., Kaeriyama, M., Zohar, Y., Ueda, H.and Urano, A.: "Effects of GnRH analogue on expression of genes encoding GH/PRL/SL family and Pit-1/GHF-1 in the pituitaries of pre-spawning sockeye salmon."General and Comparative Endocrinology. 118(3). 418-424 (2000)
Description
「研究成果報告書概要(欧文)」より
-
-
[Publications] Higa, M., Kanda, H., Kitahashi, T., Ito, M., Shiba, T.and Ando, H.: "Quantitative analysis of fushi tarazu factor 1 homolog mRNAs in the pituitary of salmon at different pre-spawning stages."Biology of Reproduction. 63. 1756-1763 (2000)
Description
「研究成果報告書概要(欧文)」より
-
[Publications] Kitahashi, T., Ando, H., Urano, A., Ban, M., Saito, S., Tanaka, H., Naito, Y.and Ueda, H.: "Micro data logger analyses of homing behavior of chum salmon in Ishikari bay."Zoological Science. 17(9). 1247-1253 (2000)
Description
「研究成果報告書概要(欧文)」より
-
[Publications] Sato, S., Ando, J., Ando, H., Urawa, S., Urano, A.and Abe, S.: "Genetic variations among Japanese populations of chum salmon inferred from the nucleotide sequences of the mitochondrial DNA control region."Zoological Science. 18(1). 99-106 (2001)
Description
「研究成果報告書概要(欧文)」より
-
[Publications] Saito, D., Ota, Y., Hiraoka, S., Hyodo, S., Ando, H.and Urano, A.: "Effects of sexual maturation and osmoregulatory capacity on expression of vasotocin gene in pre-spawning chum salmon."Zoological Science. 18(in press). (2001)
Description
「研究成果報告書概要(欧文)」より
-
-
