This Article Full Text (PDF) References Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Suga, S. Articles by Ogawa, M. Search for Related Content PubMed PubMed Citation Articles by Suga, S. Articles by Ogawa, M. Pubmed/NCBI databases Compound via MeSH Substance via MeSH Hazardous Substances DB IRON Social Bookmarking                         What's this?

Iron in the Enameloid of Perciform Fish

Department of Pathology, The Nippon Dental University, School of Dentistry at Tokyo, 1-9-20, Fujimi, Chiyoda-ku, Tokyo, 102, Japan

Y. Taki

Tokyo University of Fisheries, 5-7, Konan-4, Minato-ku, Tokyo, 108, Japan

M. Ogawa

Department of Pathology, The Nippon Dental University, School of Dentistry at Tokyo, 1-9-20, Fujimi, Chiyoda-ku, Tokyo, 102, Japan

It is known that a high concentration of iron is deposited in the enameloid of some teleostean fish. Previously, Suga et al. (1989) pointed out that the iron concentration in the enameloid is related to the phylogeny of fish rather than to the feeding habits, according to the results of quantitative iron analyses on the teeth of marine teleost fish of the Tetraodontiformes. In the present study, in order for the previous idea to be verified, quantitative iron analysis was made with an electron microprobe on the enameloid offish belonging to the Perciformes, which is the largest group of teleostean fish in the world and consists of both marine and freshwater species. The enameloid of all the fish examined (57 species) contained high iron concentrations ranging from 0.2% to 10.2% at the surface or middle layer, whereas that of an advanced suborder, Tetraodontoidei, of the Tetraodontiformes was very low in iron, at a level which could not be discriminated from the background value of the emission intensity. The distribution pattern of iron in the enameloid was classified into at least two types, namely, type A, in which a high iron concentration was observed mainly in the surface layer, and type B, in which iron was deposited throughout the entire layer, although there were differences in concentration. There were some differences in the concentration and distribution of iron in the enameloid for the families; for example, those of the Scaridae had a type A distribution, with about 0.2% iron only at the surface layer, whereas those of the Cichlidae, Centrarchidae, and Acanthuridae, which showed a type B distribution, contained iron ranging from 2.9% to 10.5% at the surface or middle layer of enameloid. Such differences seemed to be associated with the difference in timing of the commencement of the iron deposition into the developing enameloid, which is probably related to the phylogeny of fish. There was no evidence to support the idea that the iron concentration in the enameloid is associated with the feeding habits offish, as proposed by previous investigators.

Journal of Dental Research, Vol. 71, No. 6, 1316-1325 (1992)
DOI: 10.1177/00220345920710060901


CiteULike    Complore    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter    What's this?

This article has been cited by other articles:

				S. Sugat, Y. Taki, and M. Ogawa Fluoride and Iron Concentrations in the Enameloid of Lower Teleostean Fish Journal of Dental Research, May 1, 1993; 72(5): 912 - 922. [Abstract] [PDF]