Morphological differences in the skin of marble trout Salmo marmoratus and of brown trout Salmo trutta

0378715 - ÚBO 2013 RIV PL eng J - Journal Article
Sivka, U. - Halačka, Karel - Sušnik Bajec, S.
Morphological differences in the skin of marble trout Salmo marmoratus and of brown trout Salmo trutta.
Folia Histochemica Et Cytobiologica. Roč. 50, č. 2 (2012), s. 255-262. ISSN 0239-8508. E-ISSN 1897-5631
R&D Projects: GA AV ČR 1QS500450513
Institutional support: RVO:68081766
Keywords : melanophore * epidermis * dermis * colour pattern * pigmentation
Subject RIV: EG - Zoology
Impact factor: 1.101, year: 2012
http://czasopisma.viamedica.pl/fhc/article/view/14750

Despite being genetically very closely related, the marble trout Salmo marmoratus and the brown trout Salmo trutta exhibit marked phenotypic differences, particularly with regard to skin pigmentation. Histological analysis of skin from the head and gill cover of differently aged individuals of the two species was carried out in order to characterize differences in skin structure. The basic structure of skin of the individuals studied corresponded with that described for other salmonids, though the head epidermis was somewhat thicker in S. marmoratus than in S. trutta, thickening with age in both species. Numerous secretory goblet cells and sporadic secretory sacciform cells were observed in the upper and middle part of the epidermis in both species. Melanophores were present in both species only in the dermis, and were bigger in S. marmoratus and present at lower average density than in S. trutta, and more or less constant across all age classes. In adult S. marmoratus with fully established marble pigmentation, light areas at low density with small (i.e. aggregated) melanophores were present, while in S. trutta melanophores were more uniformly distributed.
Permanent Link: http://hdl.handle.net/11104/0210121