. 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. epidemics in fishes and in immature and adult forms have been found in such numbers in the gills of young goldfishes as to cause the death of en- tire hatchings. These worms grow to such size that they force the operculae from the sides of the head and produce death from exhaustion and inability of the fishes to breathe. No preventive means or parasiticides have been devised to eradicate these destructi
. 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. epidemics in fishes and in immature and adult forms have been found in such numbers in the gills of young goldfishes as to cause the death of en- tire hatchings. These worms grow to such size that they force the operculae from the sides of the head and produce death from exhaustion and inability of the fishes to breathe. No preventive means or parasiticides have been devised to eradicate these destructive parasites, most of the species of which do not exceed i cm. in length, and many of them are much smaller. HiRUDiNiD^ OR Leeches. These parasites are divided into two groups, the Rhynchobdellidte which pierce the tissues of their hosts by means of a fine protrusile stomodaeum or proboscis, and the Gnathobdellida which bite their prey by means of triangular horny jaws. They are carniv- orous oblong . and generally depressed contractile worms, having the mouth encircled with a lip and a flat disc at the posterior end, both adopted to ad- here to other bodies and to serve as organs of locomotion. Leeches abound in both fresh and salt water and in tropical countries some forms live on Fishes, frogs and turtles are most frequently attacked, but they also attach themselves to other animals which come to the water to drink. The larger blood-sucking forms are Hirudo and Macrobdella; and the true parasitic forms belong to Ichthyobdella, Cystobranchus and Clepsine which feed principally on fishes, and Nephilis and Aulastomus on snails and worms. The North American leeches which prey on freshwater fishes and amphibia are the species Piscicola funduli, known as the Carp-leech, Figs. 94 and 95, P. punclata, Actinobdella inequiannulata, Philobdella gracile, Clepsine elegans, and C. par- asitica. Young leeches infest the gills of fishes, especially the fry, literally packing them solid, and
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectaquariu, bookyear1908
