Light and electron microscopic immunocytochemical localization of thyroglobulin in the thyroid gland of the anadromous sea lamprey, Petromyzon marinus L., during its upstream migration

1978 ◽  
Vol 187 (3) ◽  
Author(s):  
GlendaM. Wright ◽  
M.F. Filosa ◽  
J.H. Youson
Keyword(s):  
Thyroid Gland ◽  
Petromyzon Marinus ◽  
Sea Lamprey ◽  
Upstream Migration ◽  
Immunocytochemical Localization ◽  
Electron Microscopic

scholarly journals [First occurrence of Sea Lamprey, Petromyzon marinus Linnaeus 1758 (Agnatha, Petromyzontiformes, Petromyzontidae) in the River Mignone (Northern Lazio).]

2021 ◽  
Vol 8 (1) ◽  
pp. 29-34
Author(s):  
Vincenzo Ferri ◽  
Paolo Crescia ◽  
Christiana Soccini ◽  
Alessio Olini ◽  
Stefano Celletti
Keyword(s):  
Endangered Species ◽  
Petromyzon Marinus ◽  
Sea Lamprey ◽  
Environmental Context ◽  
Upstream Migration ◽  
Rare And Endangered Species ◽  
Fish Ladder ◽  
First Occurrence ◽  
Rare And Endangered

[The spring presence of two individuals of the Sea lamprey, Petromyzon marinus, in the River Mignone near Tarquinia (Northern Lazio) could highlight a new Italian reproductive site of this rare and endangered species. This exceptional possibility could certainly be favored by the good quality of both the waters of the Mignone, and the environmental context of the record, but would require the urgent equipment of the barrier of Le Mole with a fish ladder in order to allow the sea lamprey’s upstream migration towards the areas of the upper course, even more suitable for their reproduction].   [Article in Italian]

scholarly journals Upstream migration, reproduction and fishery of sea lamprey (Petromyzon marinus Linnaeus, 1758) in the River Ulla (NW Spain)

2015 ◽  
Vol 2 ◽  
Author(s):  
Silva Sergio ◽  
Barca Sandra ◽  
Vieira-Lanero Rufino ◽  
Servia María ◽  
Lago Lorena ◽  
...  
Keyword(s):  
Petromyzon Marinus ◽  
Sea Lamprey ◽  
Upstream Migration ◽  
Nw Spain

Blood cell destruction in the opisthonephric kidney of the sea lamprey, Petromyzon marinus L.

1971 ◽  
Vol 49 (6) ◽  
pp. 962-963 ◽  
Author(s):  
John H. Youson
Keyword(s):  
Blood Cell ◽  
Blood Cells ◽  
Petromyzon Marinus ◽  
Sea Lamprey ◽  
Electron Microscopic ◽  
Cell Destruction

Electron microscopic observations reveal that blood cells are engulfed by macrophages within interstitial sinusoids of the opisthonephric kidneys of larval and adult Petromyzon marinus. Therefore the kidneys represent one site where blood cell destruction may occur in this animal.

Structure of the conus arteriosus and ventral aorta in the sea lamprey, Petromyzon marinus, and the Atlantic hagfish, Myxine glutinosa: microfibrils, a major component

1984 ◽  
Vol 62 (12) ◽  
pp. 2445-2456 ◽  
Author(s):  
Glenda M. Wright
Keyword(s):  
Extracellular Matrix ◽  
Connective Tissue ◽  
Petromyzon Marinus ◽  
Sea Lamprey ◽  
Elastic Fibre ◽  
Electron Microscopic ◽  
Primitive Form ◽  
Myxine Glutinosa ◽  
Ventral Aorta ◽  
Adult Lamprey

Light and electron microscopic observations of the conus arteriosus (CA) and ventral aorta (VA) of the sea lamprey, Petromyzon marinus, and the Atlantic hagfish, Myxine glutinosa, reveal the presence of a unique form of fibrous extracellular matrix within their media and an unusual type of connective tissue forming the lateral subendothelial distensions found only in the lamprey CA. The extracellular matrix of the media in lamprey and hagfish CA and VA is characterized by large concentrations of tubular, elastic fibrelike microfibrils 11–17 nm in diameter. No elastic fibrelike elastin component could be found. Collagen fibrils, matrix granules, and intergranular filaments make up the remainder of the matrix. The loose connective tissue composing the lateral distensions of the larval and adult lamprey CA contains ultrastructural features similar to those of lamprey mucocartilage. It is speculated that since lampreys and hagfish are living representatives of the most primitive group of vertebrates, the microfibrils present in their major arteries may represent a primitive form of elastic fibre in which elastin has not yet developed. The functional significance of the extracellular microfibrils in the CA and VA of lamprey and hagfish and the occurrence of lateral distensions in the lamprey CA are discussed.

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