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Histological Abnormalities and Bacterial Proliferation in Red Drum and Black Drum Ovaries
Author(s) -
Nieland David L.,
Wilson Charles A.
Publication year - 1995
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1995)124<0139:haabpi>2.3.co;2
Subject(s) - epizootic , biology , staining , pathology , ovarian tissue , atresia , ovary , anatomy , immunology , medicine , endocrinology , virus , genetics
Histological examination of formalin‐fixed ovarian tissues from sexually mature red drums Sciaenops ocellatus and black drums Pogonias cromis revealed abnormally shaped oocytes, modified histological staining properties, and infections of a large, gram‐positive, rod‐shaped bacterium. These conditions were encountered only during the speciesˈ respective spawning seasons and occurred at seasonal incidences of 0–33%. We have variously interpreted the abnormalities as artifacts of poor tissue preparation, as an unusual form of midseason atresia, as an epizootic, and as artifacts of delayed or incomplete preservation of tissues. While a definitive interpretation has yet to be reached, a return to and strict adherence to prompt and complete preservation of all ovarian tissues has drastically decreased incidences of the anomalies and bacterial infections in both species.