. Goldfish breeds and other aquarium fishes, their care and propagation; a guide to freshwater and marine aquaria, their fauna, flora and management. Aquariums; Goldfish. AILMENTS AND DISEASES mostly of the first-named genus; of which some are marine and others freshwater forms. Those on migratory fishes are able to change with their hosts from salt to freshwater and the reverse. They are wholly external parasites, either in the gills or on the surface, and frequently change their host, though each species prefers a certain genus or closely related kinds, to which it is usually confined. They
. Goldfish breeds and other aquarium fishes, their care and propagation; a guide to freshwater and marine aquaria, their fauna, flora and management. Aquariums; Goldfish. AILMENTS AND DISEASES mostly of the first-named genus; of which some are marine and others freshwater forms. Those on migratory fishes are able to change with their hosts from salt to freshwater and the reverse. They are wholly external parasites, either in the gills or on the surface, and frequently change their host, though each species prefers a certain genus or closely related kinds, to which it is usually confined. They have a flat rounded carapace, notched on either side and bluntly projecting in the centre, nearly trans- parent, and elegantly marked in colors; smooth above and armed below with spines to attach themselves on the surface of their hosts, to which they also cling by anterior maxillipeds which are modified into sucking discs, and by clasping posterior legs or maxillipeds. They can swim freely and the males frequently abandon their hosts in the breeding season, as do also the larger females, at times, as unlike other copopods, the hun- dreds of eggs are not carried in sacs but are fastened in rows on objects on the bottom. As their food is the blood of their host, extracted through the sucking discs, they are destructive parasites which become serious menaces, especially in the confines of the aquarium, where they are prevented from changing to a number of fishes. They are of frequent occurrence on both pond- raised and imported goldfishes, usually easy of detection by their size and shape. FIG. loo. yirru/us catosiomi, a Crvatacenn , â i a ⢠r i c parasite. Enlarged ventral and doreai views, and The general American trcshwater torm IS natural size. Avgulus catostomt. Fig. lOO. Other com- mon Crustacean parasites on the gills and surface of freshwater fishes are Achtheres laca, A. -percar urn, Ergasilus funduli, Lernao-poda fontinalis, L. siscowet, L. coregoni, L. pomotidis, L
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectaquariu, bookyear1908
