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The Gonadotropic Cell in Parr, Precocious Parr Male and Smolt of the Atlantic Salmon, Salmo salar. An Immunocytological, Light‐ and Electron Microscopical Study

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Abstract

Lindahl, K. 1980. The gonadotropic cell in parr, precocious parr male and smolt of the Atlantic salmon, Salmo salar. An immunocytological, light‐ and electron microscopical study. (Department of Zoology, University of Stockholm, Sweden.) — Acta zool. (Stockh.) 61(2): 117–125.

Only one GTH cell type was identified in the pars distalis of the parr, smolt and precocious parr male. On a fine structural basis four phases with transitional forms of the GTH cell were recognized. In parr and smolt the GTH cells have numerous secretory granules and their cytology substantiate that they are in a storing phase with a possibly low release rate. On the contrary, in the precocious parr male all phases of the GTH cell are present. The great number of active cells and frequent degranulation and vacuolization indicate a high activity and release level.
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Document Type: Original Article

Affiliations: Department of Zoology, University of Stockholm, Sweden

Publication date: 01 June 1980

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