. Preliminary report on the fish and fisheries of Ontario [microform]. Fishes; Fisheries; Poissons; Pêche commerciale. ^. Daphnia pulcx. Cyprii Candida. x 16. ^^â ^C3 Cyclops sp. X. 12. larger shrimp-like forms. Others again, more agile, leap to secure the insects on which they t'c'ed, while many are carnivorous, feeding on other smaller species of tish. Unquestionably the microscopic life of the fresh waters is the prime .source of much of the food of our fresh water fishes, and mo^t comprehensive investi- gations are therefore being carried on in regard to the life of the larger bodies of f
. Preliminary report on the fish and fisheries of Ontario [microform]. Fishes; Fisheries; Poissons; Pêche commerciale. ^. Daphnia pulcx. Cyprii Candida. x 16. ^^â ^C3 Cyclops sp. X. 12. larger shrimp-like forms. Others again, more agile, leap to secure the insects on which they t'c'ed, while many are carnivorous, feeding on other smaller species of tish. Unquestionably the microscopic life of the fresh waters is the prime .source of much of the food of our fresh water fishes, and mo^t comprehensive investi- gations are therefore being carried on in regard to the life of the larger bodies of fresli water in Europe with the object of ascertaining the conditions which appear favourable to the abundance of food-material of this character, and the species which appear to contribute most to the sustenance of the tish. As the smaller species of fish serve as food for the larger rapacious forms, which may thus be regarded as inimical to them, so also the various fish-eating bird^ and reptiles may be regarded as enemies of the class. There are, however, some more insidious enemies which are deserving of mentionâthe various fish- eating insects, and the various parasites, animal and vegetal, which afiiict fish. Amongst the former are specially to be noted the larger water-beetles, Dytisoua and Ac'Uiti^, which may completely devour small fish by the aid of their rapa- cious jaws; the larger and smaller water-bugs and water-boatmen, Belostoma, N'dotiecta and Ranatra, which attack fish by grasping them with their power- ful front legs and then sting them and suck their blood by their sucking proboscis. ,. 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 Wright, R. Ramsay (Robert Ramsay), 1852-1933. [Toronto? : s. n. ]
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectfi, booksubjectfishes
