NDLI: Immunohistochemical demonstration of oxytocin-like, neuropeptide Y-like and gonadotropin-releasing hormone-like substances in the hypothalamo-hypophysial system of ayu,plecoglossus altivelis altivelis, in osmotically different environments

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Immunohistochemical demonstration of oxytocin-like, neuropeptide Y-like and gonadotropin-releasing hormone-like substances in the hypothalamo-hypophysial system of ayu,plecoglossus altivelis altivelis, in osmotically different environments

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Ichthyological Research : Volume 45, Issue 4, January 1998

Ichthyological Research : Volume 44

Immunohistochemical demonstration of oxytocin-like, neuropeptide Y-like and gonadotropin-releasing hormone-like substances in the hypothalamo-hypophysial system of ayu,plecoglossus altivelis altivelis, in osmotically different environments

Content Provider	Springer Nature Link
Author	Honma, Yoshiharu Shigehisa, Hiroyuki Chiba, Akira Oka, Shunya
Copyright Year	1998
Abstract	To ascertain the role of neuropeptides on the hypothalamo-hypophysial system of a fish in osmotically different environments, an immunohistochemical study of oxytocin (OXT), neuropeptide Y (NPY) and gonadotropin-releasing hormone (GnRH) was carried out on the anadromous salmonoid fish,Plecoglossus altivelis altivelis, commonly known as Ayu. River fish caught were acclimatized in a freshwater aquarium, half of them being subsequently kept as a control group and the remainder being transferred to a sea water aquarium, through 1/3 diluted sea water, as an experimental group. OXT-like immunoreactivity as demonstrated in the neurosecretory pathway, having the same pattern was that shown by aldehyde fuchsin staining. Noticeably, a mass of nucleus preopticus (NPO) and a marginal portion of the pars nervosa in the control group became strongly immunoreactive, whereas a very weak reaction was obtained in the sea water-retained fish, suggesting the release of the labelled substance. In the latter, NPY-like substance was widely distributed in the brain without NPO, with the positive substance being dense in the terminal rami of the pars nervosa bordering the pars distalis. However, no remarkable difference in GnRH-like and NPY-like immunoreactivities in the hypothalamo-hypophysial system was apparent between the two groups. These results suggested that OXT (probably isotocin)-like substance may play a role in osmoregulation.
Starting Page	35
Ending Page	42
Page Count	8
File Format	PDF
ISSN	13418998
Journal	Ichthyological Research
Volume Number	45
Issue Number	1
e-ISSN	16163915
Language	English
Publisher	Springer-Verlag
Publisher Date	1998-01-01
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Immunohistochemistry oxytocin neuropeptide Y GnRH osmosis Plecoglossus Ecology Marine Ecology Zoology Animal Systematics/Taxonomy/Biogeography
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

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Immunohistochemical and ultrastructural characterization of the terminal nerve ganglion cells of the ayu, Plecoglossus altivelis (Salmoniformes, Teleostei)

Dimorphism in the dorsal fin shape of immature ayu,plecoglossus altivelis, through a status-dependent secondary change

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Immunohistochemical demonstration of oxytocin-like, neuropeptide Y-like and gonadotropin-releasing hormone-like substances in the hypothalamo-hypophysial system of ayu,plecoglossus altivelis altivelis, in osmotically different environments

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