Identifier: annualreportof4189718newy (
find matches)Title:
Annual report of the Commissioners of Fisheries, Game and Forests of the State of New YorkYear:
1895 (
1890s)Authors:
New York (State). Commissioners of Fisheries, Game and ForestsSubjects:
Forests and forestry Fisheries Game and game-birdsPublisher:
(Albany, N.Y. : The Commission)Contributing Library:
Smithsonian LibrariesDigitizing Sponsor:
Biodiversity Heritage LibraryView Book Page:
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view book online to see this illustration in context in a browseable online version of this book.Text Appearing Before Image:he same group as the Myxosporida, i. c, to the Sporozoa, but whichcannot be classified among the usual fish parasites. This parasite, which has neverbeen described, I shall name LympJiosporidium truttce, and in the following report Iwill give as much of its life history as could be made out. Characteristic 5^mpt°ms °f tl)e Disease. The epidemic was equally fatal to fish of all ages. Mr. Thompson estimates that2,000 yearlings, 1,000 two and three year old fish, and some 10,000 fingerlings (from four to six inches long), were lost. They died as rapidly during the cold daysof November as in the hot days of July and August; indeed, the ponds are fed bysprings and Mr. Thompson asserts that the temperature of the water never rises abovesixty degrees F. The fish, especially the yearlings, were characterized by sluggish motion andinability to withstand rough treatment of any kind, most of them dying within a fewminutes after removal from the waters of the runways to a pail. In the water theText Appearing After Image:FISHERIES, GAME AND FORESTS. 177 actions of the fish were indicative of their diseased condition, for they wouldfrequently rise to the surface and swim upon the side or turn belly-up on the surface,while at one period hundreds of the dead fish were daily removed from the runways.In some of these there were no external indications of the disease; in others, and inthe majority of the cases, great red spots or ulcers were visible, sometimes on thebelly, again on the back, but most often on the sides. The bases of the fins wereparticularly subject to these sores and the eyes were often disfigured by them. Moreserious disfigurements were frequently seen in the entire loss of one half of the lowerjaw, bone and tissues being eaten entirely away (Plate I); or, again, the ulcers in thesides would give rise to holes through the body wall and into the body cavity, andlive fish were occasionally seen with parts of their viscera hanging out of the holesthus made (Plate II). The red ulcers which arNote About Images Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.